US2358975A - Wall form tie - Google Patents

Description

Sept. 26,1944.

' B. HILLBERG WALL FORM '1 IE Fil ed Feb. 18, 1944 B Sheet S-Sheet 1 l w W Patented Sept. 26, 1944 UNITED STATES PATENT OFFICE WALL FORM TIE Bror Hillberg, Chicago, Ill., assignor to Superior Concrete Accessories, Chicago, 111., a partnership consisting of Lawrence H. Umbach, Ruth M. Umbach, and Bror Hillberg Application February 18, 1944, Serial No. 522,870

' 20 Claims. (Cl. 25-131) The present invention relates generally to clamps for use in tying together and holding against separation laterally spaced, upstanding forms for concrete walls or like structures. More particularly the invention relates to that type of clamp which is known in the building trade or art as a tie clamp, is adapted to be applied to one end of a combined tie and spreader rod extending between and through the forms, and comprises a holder member which is designed to fit against the outer surface of a single reenforcing beam, such as a stud or Wale, on the outer face of the form through which the one end of the tie rod extends, and has on the outer side thereof an elongated, inclined orangularly disposed surface which has a longitudinal slot therethrough for receiving the one end of the tie rod and is adapted when the holder member is slid in one direction relatively to the reenforcing beam to engage an enlargement on the extremity of said one end of the tie rod with such a wedge action as to urge the holder member inwards and cause it to clamp the beam against the adjacent form and hold the beam and form in connected relation with the combined tie and spreader rod.

One object of the invention is to provide a clamp of this type which is an improvement upon, and has certain inherent advantages over, previously designed tie clamps of the same general character and is characterized by'the fact that it is so designed and constructed that the clamping pressure resulting from sliding the holder member into wedged relation with the enlargement on the combined tie and spreader rod does not tend to roll or rock the reenforcing beam relatively to the adjacent form. 7

Another object of the invention is to provide a tie clamp of the type under consideration which comprises in addition to the holder member a U-shaped bracket which is positioned on the side of the reenforcing beam that is opposite the enlargement equipped end of the rod and has one leg thereof detachably connected to the adjacent form and its other legprovided with an outwardly extending head equipped shank which extends through a slot in the holder member and serves to connect the holder member to the bracket while at the same time permitting the holder member to slide relatively to the bracket in connection with shift thereof into its operative Position.

Another object of the invention is to provide a tie clamp of the last mentioned character in which the slot in the holder member for the head equipped shank on the outer or other leg of the U-shaped bracket is formed in a second elongated inclined or angularly disposed surface on the outer side of the member, and such sur face is longitudinally aligned with the inclined surface that coacts with the enlargement on the combined tie and spreader rod and is so designed and arranged that in donnection with sliding of the holder member into its operative position it engages the head of the shank with such a wedge action as additionally to urge the holder member into clamped relation with the reenforcing beam on the outer face of the adjacent form.

A further object of the invention is to provide a clamp of the type and character under consideration in which the slot in the holder member for the head'equipped shank on the outer leg of the U-shaped bracket is wider than, and communicates with, one end of the slot for the enlargement equipped end of the rod with the result that the enlargement equipped end of the tie rod may be inserted through the slot for the head equipped shank and then slid into its own slot in connection with manipulation of the holder member into operative relation with the combined tie and spreader rod.

A still further object of the invention is to provide a tie clamp which is generally of new and improved construction, effectively and efficiently fulfills its intended purpose, and may be mounted and dismantled with facility and also produced at a comparatively low cost.

Other objects of the invention and the various advantages and characteristics of the present tie clamp will be apparent from a consideration of the following detailed description.

The invention consists in the several novel features which are hereinafter set forth and are more particularly defined by claims at the conclusion hereof.

In the drawings which accompany and form a part of this specification or disclosure and in which like numerals and letters of reference denote corresponding parts throughout the several views:

Figure 1 is a fragmentary perspective View showing a pair of laterally spaced, upstanding wall forming forms with a combined tie and spreader rod therebetween, and also showing a clamp embodying one form of the invention applied to one end of the tie rod;

Figure 2 is a front-view of the clamp of Figure 1 illustrating in detail the construction, design and mode of operation of the holder member and the U-shaped bracket;

Figure 3 is a vertical section taken on the line 3-3 of Figure 2 and illustrating the manner in which the two inclined or angularly disposed surface on the outer side of the holder member of the clamp coact respectively with the enlargement on the combined tie and spreader rod and the head of the shank to produce a clamping action which serves to clamp the reenforcing beam against the adjacent form and also to hold the beam and form in connected relation with the rod;

Figure 4 is a horizontal section taken on the line 4-4 of Figure 3 and illustrating in detail the manner in which the inner leg of the U- shaped bracket of a clamp is detachably connected to the adjacent form;

Figure 5 is a front view of a clamp embodying a second or modified form of the invention;

Figure 6 is an enlarged vertical section taken on the line 6-6 of Figure 5; and

Figure '7 is a perspective view showing in detail the construction and design of the U-shaped bracket of the clamp of Figures 5 and 6 and illustrating the manner in which the inner leg of such bracket is detachably connected to the adjacent form.

The clamp which isshown in Figures 1, 2, 3 and 4 of the drawings constitfltes one form of the invention. It is essentially of the so-cal-led tie variety and is illustrated in connection with a combined tie and spreader rod R and a pair of upstanding wall forming forms F and F The forms are disposed in laterally spaced relation and are adapted to have concrete poured therebetween for wall formingpurposes. The rod R extends horizontally across the space between the two forms and together with the clamp serves to prevent separation of the forms during pouring of the concrete. As well understood in the art, the forms are removed after hardening or setting of the concrete. The form F, as shown :in Figure 1., is in,the form of a horizontal series of vertically extending planks f and F. The latter are arrangedso that the side edges thereof are in abut ment. One end of the combined tie and spreader I rodR extends through the form F and is anchored to the latter in any suitable manner. The other end of the rod extends through a notch f in one of the side margins of the plank f and projects outwards beyond the form F. Such projecting end of the rod directly overlies a horizontal reenforcing beam B, such as a stud or wale,

on the outer face of the form F. The beam B serves not only as a reenforcing instrumentality for the form F, but also as a medium for aligning the various planks constituting the form F. The outer extremity of the end of the combined tie and spreader rod R that .projects through the notch in the plank f projects slightly beyond the outer surface of the reenforcing beam B and is provided with .an enlargement r. The notch f in the plank f ofthe form F is of sufficient size to permit the erflargement .r to pass therethrough in connection with assembly of the combined tie and spreader rod with respect to the form F. Immediately adjacent the inner end of the notch f the rod R is provided with a bulge 1' and a washer T The washer is snugly mounted on the rod and is interposed between the bulge r and the inner face of the plank f. It serves to prevent out-fiow of concrete through the notch f and coacts with the bulge r to form a stop shoulder whereby inward movement of the form F with respect to the combined tie and spreader rod R is limited.

an elongated holder member 8 and a U-shaped bracket 9.

The holder member is preferably in the form of a one-piece casting and is adapted in connectiori with use thereof to extend vertically and fit against the outer surface of the reenforcing beam B. The inner side or face of the holder member 8 is flat in order that the member is free to slide vertically relatively to the outer surface of the reenforcing beam. On the upper central portion of the outer side of the holder member a vertically elongated, inclined or angularly disposed surface H1 is provided. This surface is inclined downwards and inwards and is adapted to engage, and coact with, the enlargement r on the extremity of the projecting end of the combined tie and spreader rod R. A vertically extending slot H is formed in, and extends transversely through, the upper end of the .holder member 8 and this slot is centrally positioned with respect to the side edges of the downwardly and inwardly inclined surface l0 and is adapted slidably to receive the portion of the rod R that is directly inwards of the enlargement r. The upper end of the slot H is closed. The width of the slot II is slightly greater than the thickness or diameter of the combined tie and spreader rod R but is less than the width of the enlargement 1". On the lower central portion of the outer side of the holder member -8 a vertically elongated, inclined or angularly disposed surface [2 is formed. This surface is downwardly and inwardly inclined in substantially the same manner as the surface it) and functions as hereinafter described. A vertical slot I3 is formed in, and extends transverselythrough, the lower end of the holder member 8. This slot is centrally positioned with respect to the side edges'of the inclined surface l2. It is of greater width than the slot H in the upper end of the holder member 8 and is sufficiently wide to accommodate the enlargement r on the projecting end of the rod R. The lower end of the slot 13 is closed and the upper end of the slot opens onto or communicates with the lower end of the slot II. In assembling the holder member 8 with respect to the enlargement equipped end of the combined tie and spreader rod R, i. e., the end which projects through the notch f in the plank f of the form F, the member is manipulated so as to bring the enlargement equipped end of the rod into the slot l3 and also to cause the lower central portion of the inner side or face of the member to engage the outer surface of the reenforcing beam B. Thereafter the member is slid downwards so as to cause the portion of the rod R directly inwards of the enlargement to enter the lower end of the slot II and the enlargement 1' to engage the inclined or angularly disposed surface 10 on the upper central portion of the outer side of the member 8. When the member is further slid downwards the surface I'D engages the enlargement r with a wedge action and causes inward movement of the member 8 with respect to the projecting .or enlargement equipped end of the rod R. Such inward movement on the part of the member serves to clamp the reenforcing beam B against the form F and results in such form being clamped against the washer'r and the beam and form being'held or maintained in connected relation with the combined tie and spreader rod R. The upper end of the member 8 is provided with a horizontal surface I4 whereby the member may be forced downwards into its operative position by a hammer or like tool. To

" release the member 8 it is only necessary to slide it upwards relatively to the reenforcing beam '3. When the member is slid upwards sothat the inclined or angularly disposedsurface I9 is out of contact with the enlargement r clamping pressure tending to urge the member 8 inwards is released. When the member 8 is shifted or slid upwards so that the enlargement r is aligned with the upper end of the slot I3 the member may be removed from the projecting or enlargement equipped end of the combined tie and spreader rod R. The lower end of the holder member 8 is provided with a flat horizontal surface I5 for receiving a hammer or other tool inconnection with upward shift or release of the member. The side portions of the holder member 8 are provided with a pair of vertically extending, laterally spaced, outwardly projecting integral ribs I6 which serve transversely to reenforce or strengthen the member.

The U-shaped bracket 9 is preferably in the form of a one-piece plate metal stamping. It serves as a medium for supporting the reenforcing beam B on the outer side of the form F and consists of a horizontally extending intermediate part I1, a depending inner leg I8 and a depending outer leg I9. The inner leg I8 is adapted to fit flatly against thecentral portion of the outer face of the plank f of the form F at a point directly beneath the reenforcin beam and is detachably connected to said plank f by way of a horizontally elongated bracket-like fixture 2D. The ends of the fixture are fixedly attached 7 by bolts 2I to the outer surface portions of the plank f. The central portion of the fixture is outwardly oiTset with respect to the end portions in order to form a pocket 22 between it and the adjacent outer face portion of said plank J. The pocket 22 is open at the top and bottom and is adapted slidably to receive the inner leg I8 of the U-shaped bracket 9. The bracket is detachably connected to the fixture 23 before positioning of the reenforcing beam B With respect to the form F. In connecting or mounting the bracket the inner leg I8 is slid downwards into the pocket 22. After insertion of the inner leg I8 into the pocket the reenforcing beam B is placed on top ofthe intermediatepart I? of the bracket'9, as shown in Figures 1, 2 and. 3. When it is desired to remove the clamp after formation of a concrete wall between the two forms F and F the holder member 8 is released by shifting it upwards andthen, after removal of the reenforcing beam B, the bracket 9 is shift ed upwards in order to remove the inner leg I8 from the pocket 22. The intermediate part H of the U-shaped bracket 9 is diagonally positioned in order that the lower end of the leg I9 i in vertical alignment with the notch f when the bracket is in its operative position. The lower end of the leg I9 of the bracket .is provided with an outwardly extending horizontal shank 23 and this extends through, and is of slightly less width than, the slot I3 in the holder member 8 and is provided at its outer end with an enlarged head 24; The head equipped shank 23 and the slot I3 in the lower end of the holder member 8 serve permanently to connect the holder 'member to the bracket while at the same time permitting the member to slide relatively to the bracket. The inner end of the shank 23 is welded or otherwise fixedly secured to the outer depending leg I9 of the U-shaped bracket 9 after insertion of the shank through the slot I3. The enlarged head 24 at the outer end of the shank is in sliding engagement with the downwardly and inwardly inclined surface I2 on the holder member 8 and coacts therewith in such manner that when the member is slid downwards into its operative position the lower end of the mem ber is urged inwards. When the member 8 is driven downwards so as to bring the surface I8 at the upper end thereof into wedging relation 'into wedgin-g relation with the enlarged head 24 on the outer end of the shank 23. The head 24 and the inclined surface I2 coact with the enlargement r and the inclined surface In to urge the holder member 8 inwards when it is shifted downwards. By reason of the fact that in con nection with downward shift of the holder member both the .inner and upper ends of the member are urged inwards the clamping pressure of the member on the reenforcing beam B is such that there is no tendency of the reenforcing beam B to roll or rock relatively to the form F. The outer depending leg I9 of the U -shaped bracket 9 is so positioned that when the clamp is in its operative position the outer face of the leg I9 is disposed inwards of the outer surface of the reenforcing beam B. The shank 23 is of such length that the inner face of the enlarged head 24 is coplanar with the inner face of the enlargement 1' on the rod R. When the holder member 8 is shifted upwards in connection with release thereof the enlarged head 24'at the outer end of the shank 23 slides out of engagement with the inclined surface I2 and this releases the clamping pressure which tends to urge inwards the lower end of the member.

In using the clamp of Figures 1 to 4, inclusive, the form F is first placed in operative relation with respect to the adjacent end of the combined tie and spreader rod R. When the form is in place the enlargement equipped end of the rod projects outwards through the notch f in, the plank 1. After proper positioning of the form F the bracket 9 is connected or attached to the plank f by inserting the inner depending leg I8 thereof into the upper end of the pocket 22 and:

the holder member 8 is slid upwards and is then manipulated so as to bring the enlargement 1' into the upper end of the slot I3 in thelowerend of the member. Thereafter the member 8 is slid downwards by hammering on the flat horizontal surface I4 at the upper end of the member. During downward shift of the member 8 the inclined surface I0 slides into engagement with the enlargement r and the inclined surface I2 slides into engagement with t he enlarged head 24. Due to the resultant wedge or cam action the member 8 is urged inwards into a position wherein it serves to clamp the reenforcing beam B against the form F and the form F against the washer r on the rod R. Since the clamping pressure on the member is applied to the upper and lower ends of such member because of the wedge action of the surface l2 with respect to the enlargement r and the wedge action of the surface [2 with respect to the enlarged head 24 the member, in connection with downward shift thereof, moves inwards in parallel relation with the outer face of the form F and hence does not exert any pressure which would tend to roll or rock the reenforcing beam with respect to the form F. After setting of the concrete which is poured between the two forms F and F the clamp is released by driving the holder member 8 upwards. When such member is driven upwards to its fullest extent the upper end of the holder may be disengaged from the enlargement equipped end of the rod. After disengagement of the member from the enlargement 1' the clamp may be removed from the form by withdrawing the inner dependnig leg I8 of the bracket from the pocket 22 within the central outwardly offset portion of the bracket-like fixture 20.

The clamp of Figures 1 to 4, inclusive, effectively and efficiently fulfills its intended purpose and is capable Of being produced at a low and reasonable cost. It may be assembled and dismantled with facility and is adapted or designed to be used with like clamps and combined tie and spreader rods. Whereas only a single clamp has been described it is to be understood that in practice a like or similar clamp may be used on the end of the rod R that projects through the form F (see Figure 1)., If it is desired merely to clamp the reenforcing beam B against the panels of the form F for panel aligning purposes the holder member 8 may be used without attaching it to the enlargement equipped end of the combined tie and spreader rod R. In this connection it is cn' templated that the bracket 9 will first be attached to the form'and then the holder member shifted downwards. of the holder member the head 24 coacts with the inclined surface I2 to urge the member 8 inwards and thus cause it to clamp the reenforcing beam against the planks.

The clamp which is shown in Figures 5, 6 and 7 constitutes a second or modified form of the invention. It is illustrated in connection with a form F and a combined tie and spreader rod R and consists of a holder member 25 and a U- shaped bracket 26. The form F comprises an upstanding pre-formed rectangular panel I which is adapted to be positioned in edge to edge relation with similar panels and is formed of a plurality of side by side upstanding planks f and a rectangular frame i The ends of the planks are nailed or otherwise rigidly connected to the upper and lower parts of the frame. In addition to the planks f and frame I the panel I of the form F embodies a horizontal reenforcing beam B This beam extends across the central portions of the outer faces of the planks f and has its ends secured to the central portions of the side parts of the rectangular frame i The combined tie and spreader rod R is the same as the rod R and is provided at one end thereof with an enlargement 1 Such end of the rod extends through a, hole I in the central portion In connection with downward shift of the panel I and overlies the central portion of the reenforcing beam B As shown in Figure 6 the extremity of the rod R that carries the enlargement r extends slightly outwards of the outer surface of the beam B The holder member 25 is exactly like the holder member 8 of the clamp of Figures 1 to 4, inclusive, and functions in the same manner. It has at the upper end thereof a vertically elongated downwardly and inwardly inclined surface 21 for engaging the enlargement r with a wedge action in connection with downward shift of the holder member 24. It also has in the upper end thereof a vertically extending transverse slot 23 for slidably receiving the portion of the rod R that is directly inwards of the enlargement T The lower end of the holder member 25 embodies a downwardly and inwardly inclined outer surface 29 and is provided with a vertically extending transverse slot 30. The slots 28 and 30 operate similarly to the slots II and I3 of the holder member 8 of the clamp of Figures 1 to 4, inclusive. The U-shaped bracket 2t comprises an intermediate part 3|, an inner leg 32 and an outer leg 33. It differs from the bracket 9 in that the intermediate part 3! extends vertically and the legs are in alignment with one another. The inner leg 32 extends horizontally in one direction from the intermediate part 3| and is detachably connected to the central portion of the panel 1 at a point directly beneath the central portion of the reenforcing beam B by way of a bracket-like fixture 34. Such fixture comprises a horizontally extending part 35 and a depending part 36. The lower end of the depending part fits against the central portion of the panel f and is securely fastened in place by Way of a bolt 31. The central and upper portions of the part 35 are outwardly offset to form a pocket 38 which has open sides and is adapted to receive the inner leg 32 of the bracket 26. The horizontally extending part 35 of the bracket-like fixture 34 projects outwards from the upper end of the depending part 36, as shown in Figures 6 and 7. It underlies the central portion of the reenforcing beam 3 and is secured thereto by way of a screw 39. When it is desired to attach the bracket 36 to the panel I of the form F the inner le 32 is aligned with one of the open sides of the pocket 38 and then the bracket is shifted horizontally so as to bring the leg 32 into seated relation with the pocket. The outer leg 32 of the bracket 26 projects from the intermediate part 25 in the same direction as the inner leg 32 and is provided with an outwardly extending shank 40 having an enlarged head M at its outer end. The shank fits slidably in the slot 30 in the lower end Of the holder member 25 and the head 4| coacts with the downwardly and inwardly inclined surface 26 in the same manner that the head 24 of the clamp of Figures 1 to 4, inclusive, coacts with the inclined surface l2 on the holder member 8. When, in connection with use of the clamp of Figures 5 to '7, inclusive, the holder member 25 is driven downwards the surface 21 is brought into wedging relation with the enlargement r on the rod R and the surface 29 is brought into wedging relation with the head M on the shank 45. The wedging action which results from the surfaces 21 and 29 contacting the enlargement and head causes the holder member to move inwards and brings the reenforcing beam B and the panel I into connected relation with the enlargement equipped end of the combined tie and spreader rod R When the holder member 25 is in place direction relatively to the beam to have said surface engage the enlargement with a wedge action and coact therewith in such manner as to urge the member inwards into clamped relation with the beam, a U-shaped bracket having one leg thereof connected to the form, and arranged so that its other leg is disposed adjacent but inwards of the other end of the holder member, and coacting means between said other leg of the bracket and said other end of the member operative in response to longitudinal sliding of the member in said one direction additionally to urge said member inwards into clamped relation with the beam.

6. A clamp designed for use in connection with a comibned tie and spreader rod having one end thereof anchored and its other end provided with an enlargement at its outer extremity and projecting through and beyond a form with a reenforcing beam on its outer face adjacent the projecting end of the rod, and comprising an elongated holder member designed to extend transversely across, and have its inner face engage slidably, the outer face of the beam, having at one end thereof an elongated angularly disposed outer wedging surface and in addition a transverse slot extending lengthwise of, and through, the surface and shaped slidably to receive the projecting end of the rod, having at its other end an elongated angularly disposed outer wedging surface inclined in the same direction as the first mentioned surface, and adapted in response to sliding movement thereof in one direction relatively to the beam to have said first mentioned surface engage the enlargement with a wedging action and to coact therewith in such manner as to urge the member inwards into clamped relation with the beam, and means including the second mentioned surface and operative in response to slide of said member in said one direction additionally to urge the member inwards into clamped relation with the beam,

7. A clamp designed for use in connection with a combined tie and spreader rod having one end thereof anchored and its other end provided with an enlargement at its outer extremity and projecting through and beyond a form with a reenforcing beam on its outer face adjacent the projecting end of the rod, and comprising an elongated holder member designed to extend transversely across, and have its inner face engage slidably, the outer face of the beam, having at one end thereof an elongated angularly disposed outer wedging surface and in addition a transverse slot extending lengthwise of, and through, the surface and shaped slidably to receive the projecting end of the rod, having at its other end an elongated angularly disposed outer wedging surface inclined in the same direction as the first mentioned surface, and adapted in response to sliding movement thereof in one direction relatively to the beam to have said first mentioned surface engage the enlargement with a wedging action and to coact therewith in such manner as to urge the member inwards into clamped relation with the beam, and a bracket provided with means for attachment to the form and embodying an element arranged so that when the member is slid in said one direction it engages and coacts with the second mentioned surface in such manner as additionally to urge the members inwards into clamped relation with the beam.

8. A clamp designed for use in connection with a combined tie and spreader rod, having one end thereof anchored and its other end provided with an enlargement at its outer extremity and projecting through and beyond a form with a reenforcing beam on its outer face adjacent the projecting end of the rod, and comprising an elongated holder member designed to extend transversely across, and have its inner face engage slidably, the outer face of the beam, having at one end thereof an elongated longitudinally extending angularly disposed outer wedging surface and a transverse slot extending lengthwise of, and through, the surface and shaped slidably to receive the projecting end of the rod, having at its other end an elongated longitudinally extending angularly disposed outer wedging surface inclined in the same direction as the first mentioned surface, and adapted in response to longitudinal sliding movement thereof in one direction relatively to the beam to have said first mentioned surface engage the enlargement with a wedge action and to coact therewith in such manner as to urge the member inwards into clamped relation with the beam, and a bracket provided with means for detachably connecting it to the form and embodying an element arranged so that when the bracket is connected to the form and theholder member is slid longitudinally in said one direction it engages and coacts with the second mentioned surface in such manner as additionally to urge the member inwards into clamped relation with the beam.

9. A clamp designed for use in connection with a combined tie and spreader rod, having one end thereof anchored and its other end provided with an enlargement at its outer extremity and projecting through and beyond a form with a reenforcing beam on its outer face adjacent the projecting end of the rod, and comprising an elongated holder member designed to extend transversely across, and have its inner face engage slidably, the outer face of the beam, having at one end thereof an elongated angularly disposed outer wedging surface and in addition a transverse slot extending lengthwise of, and through, the surface and shaped slidably to receive the projecting end of the rod, having at its other end an elongated angularly disposed outer wedging surface inclined in the same direction as the first mentioned surface and in addition a transverse slot extending lengthwise of, and through, the second mentioned surface, and adapted in response to sliding movement thereof in one direction relatively to the beam to have the first mentioned surface engage the enlargement with a wedge action and to coact therewith in such manner as to urge the member inwards into clamped relation with the beam, and a bracket provided with means for attachment to the form and embodying an outwardly extending shank extending through the second mentioned slot and equipped at its outer end with a head adapted when the bracket is attached to the form and the holder member is slid in said one direction to engage and coact with the second mentioned surface in such manner as additionally to urge the member into clamped relation with the beam.

10. A clamp designed for use in connection with a combined tie and spreader rod having one end thereof anchored and its other end provided with an enlargement at its outer extremity and projecting through and beyond a form with a reenforcing beam on its outer facev adjacent the projecting end of the rod, and comprising an elongated holder member designed to extend transversely across, and have its inner face en-- gage slidably, the outer surface of the beam, having at one end thereof an elongated longitudinal- 1y extending angularly disposed outer wedging surface and in addition a transverse slot extending lengthwise of, and through, the surface and shaped slidably to receive the projecting end of the rod, having at its other end an elongated longitudinally extending angularly disposed outer wedging surface inclined in the same direction as the first mentioned surface and in addition a transverse slot extending lengthwise of, and through, the second mentioned surface, and adapted in response to longitudinal sliding movement thereof in one direction relatively to the beam to have the first mentioned surface engage the enlargement with a wedge action and to coact therewith in such manner as to urge the member inwards into clamped relation with the beam, and a bracket provided with means for detachably connecting it to the form and embodying an outwardly extending shank extending through the second mentioned slot and equipped at its outer end with a head adapted when the bracket is attached to the form and the holder member is slid longitudinally in said one direction to engage and coact with the second mentioned surface in such manner as additionally to urge the member into clamped relation with the beam.

11. A clamp designed for use in connection with a combined tie and spreader rod having one end thereof anchored and its other end provided with an enlargement at its outer extremity and projecting through and beyond a form with a reenforcin-g beam on its outer face adjacent the projecting end of the rod, and comprising an elongated holder member designed to extend transversely across, and have its innerface engage slidably, the outer surface of the beam, having at one end thereof an elongated longitudinally extending angularly disposed outer wedging surface and in addition a transverse slot extending lengthwise of, and through, the surface and shaped slidably to receive theprojecting end of the rod, having at its other, end an elongated longitudinally extending angularly disposed outer wedging surface inclined in the same direction as the first mentioned surface and in addition a transverse slot of greater width than the first mentioned slot and extending lengthwise of, and through, the second mentioned surface,-

and having the inner end thereof joined to and communicating with the inner end of said first mentioned slot and adapted to have the enlargement inserted therethrough in connection with mounting of the member with respect to said projecting end of the rod, and adapted in response to longitudinal sliding movement thereof in one direction relatively to the beam to have the first mentioned surface engage the enlargement with a wedge action and to coact therewith in such manner as to urge the member inwards into clamped relation with the beam, and a bracket provided with means for detachabl connecting it to the form and embodying an outwardly extending shank extending through the second mentioned slot and equipped at its outer end with a head adapted when the bracket is attached to the form and the holder member is slid longitudinally in said one direction to engage and coact with the second mentioned surface in such manner as additionally to urge the member into clamped relation with the beam.

to urge th member into 12. In combination with a combined tie and spreader rod having one end thereof anchored and its other end provided with an enlargement at its outer extremity and projecting through and beyond a form with a reenforcing beam on its outer face adjacent the projecting end of the rod, a clamp comprising an elongated holder member extending transversely across, and having its inner face engaging slidably, the outer surface of the beam, embodying at one end thereof an elongated angularly disposed outer'wedging surface and in addition a transverse slot extending lengthwise of, and through, said surface and having the projecting end of the rod extending therethrough, embodying at its other end an elongated longitudinally extending angularly disposed outer wedging surface inclined in the sam direction as the first mentioned surface and in addition a transverse slot extending lengthwise of, and through, the second mentioned surface, and adapted in response to sliding movement thereof in one direction relatively to the beam to have said first mentioned surface engage the enlargement with a wedge action and to coact therewith in such manner as to urge the member inwards into clamped relation with the beam, a U-shaped bracket having one leg thereof connected to the form, arranged so that its other leg is disposed adjacent but inwards of the other end of the holder member, provided on said outer leg thereof with an outwardly extending shank extending throughthe second mentioned slot and equipped at its outer end with an enlarged head, adapted when the holder member is slid in said one direction to engage and coact with the second mentioned surface in such manner as additionally clamped relation with the beam.

13."In combination with a combined tie and spreader rod having one end thereof anchored and its other end provided with an enlargement at its outer extremity and projecting through and beyond a form with a reenforcing beam on its outer face adjacent the projecting end of the rod,

a clamp comprising an elongated holder member extending transversely across, and having its inner face engaging slidably, the outer surface of the beam, embodying at one end thereof an elongated longitudinally disposedouter wedging surface and in addition a transverse slot extend ing lengthwise of, and through, said surface and having the projecting end of the rod extending therethrough, embodying at its other end an elongated longitudinally extending angularly disposed outer wedging surface inclined in the same direction as the first mentioned surface and in addition a transverse slot of greater width than the first mentioned slot and extending lengthwise of, and through, the second mentioned surface,.

and having the inner end thereof joined to, and communicating with, the inner end of said first mentioned slot and adapted to have the enlargement inserted therethrough in connection with mounting of the member with respect to said projecting end of the rod, and adaptedin response to sliding movement thereof in one direction relatively to the beam to have said first mentioned surface engage the enlargement with a, wedge action and to coact therewith in such manner 'as to urge the member inwards into clamped relation with the beam, a U-shaped bracket having one leg thereof connected to the form, arranged so. that its other leg is disposed adjacent but inwards of the other end of the holder member, provided on said outer leg thereof with an outwardly extending shank extending through the second mentioned slot and equipped at its outer end with an enlarged head, adapted when the holder member is slid in said one direction to engage and coact with the second mentioned surface in such manner as additionally to urge the member into clamped relation with the beam.

14. A clamp designed for use in connection with a horizontally disposed combined tie and spreader rod having one end thereof anchored and its other end provided with an enlargement at its outer extremity and projecting through and beyond a form with a horizontal reenforcing beam on its outer face directly beneath said projecting end of the rod, and comprising an elongated vertically extending holding member designed to extend transversely across, and have its inner face engage slidably, the outer face of the beam, embodying at its upper end an elongated longitudinally extending outer wedging surface inclined downwards and inwards and in addition a transverse slot extending lengthwise of, and through, the surface and shaped slidably to receive the projecting end of the rod, embodying at its lower end an elongated longitudinally extending outer wedging surface inclined downwards and inwards and in addition a transverse slot extending lengthwise of, and through, the second mentioned surface, and adapted in response to downward sliding movement thereof relatively to the beam to have the first mentioned surface engage the enlargement with a wedge action and to coact therewith in such manner as to urge the member inwards into clamped relation with the beam, and a bracket provided with means whereby it may be attached to the form directly beneath the beam and opposite the projecting end of the rod and embodying an outwardly extending shank extending through the second mentioned slot and equipped at its outer end with an enlarged head adapted when the bracket is in place and the holder member is slid downwards to engage and coact with the second mentioned surface in such manner as additionally to urge the member into clamped relation with the beam.

15. A clamp designed for use in connection with a horizontally disposed combined tie and spreader rod having one end thereof anchored and its other end provided with an enlargement at its outer extremity and projecting through and beyond a form with a horizontal reenforcing beam on its outer face directly beneath said projecting end of the rod, and comprising an elongated vertically extending holding member designed to extend transversel across, and have its inner face engage slidably, the outer face of the beam, embodying at its upper end an elongated longitudinally extending outer wedging surface inclined downwards and inwards and in addition a transverse slot extending lengthwise of and through, the surf-ace and shaped slidably to receive the projecting end of the rod, embodying at its lower end an elongated longitudinally extending outer wedging surface inclined downwards and inwards and in addition a transverse slot of greater width than the first mentioned slot, extending lengthwise of, and through, the second mentioned surface, and having its upper end joined to and communicating with the lower end of the first mentioned slot and adapted to have the enlargement inserted therethrough in connection with mounting the member with re-- spect to the rod, and adapted in response to downward sliding movement thereof relatively to the beam to have the first mentioned surface engage the enlargement with a wedge action and to coact therewith in such manner as to urge the member inwards into clamped relation with the beam, and a bracket provided with means whereby it may be attached to the form directly beneath the beam and opposite the projecting end of the rod and embodying an outwardly extending shank extending through the second mentioned slot and equipped at its outer end with an enlarged head adapted when the bracket is in place and the holder member is slid downwards to engage and coact with the second mentioned surface in such manner as additionally to urge the member into clamped relation with the beam.

16. In combination with an upstanding concrete wall form having a hole therethrough, a combined tie and spreader rod having one end thereof anchored to a second upstanding form in spaced relation with the first mentioned form and its other end provided with an enlargement at its outer extremity and projecting through and beyond the hole in said first mentioned form, and horizontal reenforcing beam extending across the outer face of said first mentioned form and positioned directly beneath the hole, a clamp comprising an elongated holder member extending vertically across, and having its inner face engaging slidably, the outer face of the beam, embodying at its upper end an elongated inclined outer wedging surface and in addition a transverse slot extending lengthwise of, and through, said surface, and having the projecting end of the rod extending therethrough, and adapted in response to longitudinal sliding thereof in one direction relatively to the beam to have said surface engage said enlargement with a wedge action and coact therewith in such manner as to urge the member inwards into clamped relation with the beam, a bracket connected to the form and arranged to support the beam, and coacting means between the bracket and the other end of the holder member operative in response to longitudinal sliding of the member in said one direction additionally to urge the member inwards into clamped relation with the beam.

17. In combination with an upstanding concrete wall form having a hole therethrough, a combined tie and spreader rod having one end thereof anchored to a second upstanding form in spaced relation with the first mentioned form andits other end provided with an enlargement at its outer extremity and projecting through and beyond the hole in said first mentioned form, and a horizontal reenforcing beam extending across the outer face of said first mentioned form and positioned directly beneath the hole, a clamp comprising an elongated holder member extending vertically across, and having its inner face engaging slidably, the outer face of the beam, embodying at its upper end an elongated inclined outer wedging surface and in addition a transverse slot extending lengthwise of, and through, said surface, and having the projecting end of the rod extending therethrough, and adapted in response to longitudinal sliding thereof in one direction relatively to the beam to'have said sur face engage said enlargement with a wedge action and coact therewith in such manner as to urge the member inwards into clamped relation with the beam, a U-shaped bracket disposed under the beam beneath the projecting end of the rod embodying a horizontal intermediate part in supporting relation with the beam, depending inner leg connected to the adjacent portion of the outer face of the first mentioned form and an outer depending leg disposed inwards of the outer face of said beam, and coacting means between the outer leg of the bracketand the lower end of the holder member operative in response to longitudinal sliding of the member in said one direction additionally to urge the member inwards into clamped relation with the beam.

18. In combination with an upstanding concrete wall form having a hole therethrough, a

combined tie and spreader rod having one end thereof anchored to a, second upstanding form in spaced relation with the first mentioned form and its other end provided with an enlargement at its outer extremity and projecting through and beyond the hole in said first mentioned form, and a horizontal reenforcing beam extending across the outer face of said first mentioned form and positioned directly beneath the hole, a clamp comprising an elongated vertically extending holding member designed to extend transversely across, and have its inner face engage slidably, the outer face of the beam, embodying at its upper end an elongated longitudinally extending outer wedging surface inclined downwards and inwards and in addition a transverse slot extending lengthwise of, and through, the surface and shaped slidably to receive the projecting end of the rod, embodying at its lower end an elongated longitudinally extending outer Wedging surface inclined downwards and inwards and in addition a transverse slot extending lengthwise of, and through the second mentioned surface, and adapted in response to downward sliding movement thereof relatively to the beam to have the first mentioned surface engage the enlargement with a, wedge action and to coact therewith in such manner as to urge the member inwards into clamped relation with the beam, a U-shaped bracket disposed under and in supportin relation with the beam and having one leg thereof connected to the form and its other leg positioned adjacent but inwards of the lower end of the holder member, and an outwardly extending shank on said other leg of thebracket extending through the second mentioned slot and equipped at its outer end with a head adapted when the holder member is slid downwards to engage and coact with the second mentioned surface in such manner as additionally to urge the member into clamped relation with the beam.

19. A clamp designed for use in connection with a form with a reenforcing beam on its outer face, comprising an, elongated holder member designed to extend transversely across, and have its inner face engage slidably, the outer face of the beam and having at one end thereof an elongated longitudinally extendin angularlyv disposed outer wedging surface and in addition a transverse slot extending lengthwise of and through said surface, and a bracket provided with means for detachably connecting it to the form and embodying an outwardly extending shank extending through the slot and equipped at its outer end with a head adapted when the bracket is attached to the form and the holder member is slid lengthwise in one direction to engage and coact with the surface in such manner as to urge the member inwards and cause it to clamp the beam against the form,

20. In combination with an upstanding concrete wall form with a horizontal reenforcing beam extending across'the outer face thereof, a clamp comprising an elongated holder member extending vertically across, and having its inner face engaging slidably, the outer face of the beam and having at its lower end an elongated longitudinally extending outer wedging surface and in addition a transverse slot extending lengthwise of, and through the surface, a U- shaped bracket disposed under, and in supporting relation with, the beam, having one leg thereof connected to the form and its other leg positioned adjacent but inwards of the lower end of the holder member, and an outwardly extending shank on said other end of the bracket extending through the slot and equipped at its outer end with a head adapted when the holder member is slid longitudinally in one direction relatively to the beam to engage and coact with the surface in such manner as to urge the member inwards and cause it to clamp the beam against the form.

- BROR HILLBERG.

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