US2368924A - Holder for stropping razor blades - Google Patents

Description

Feb. 6, 1945. HANSEN 2,368,924

HOLDER FOR STROPFING RAZOR BLADES Filed May 15 1944 5' 5' j/ vvnvroe,

Patented Feb. 6, 1945 I UNITED STAT ES FATENT OFFICE I a 2,368,924 I HOIDER iFflR STROPPING .BLADES Louis E. Hansen, '1oronto, Ontario, Canada Application 111313 15. 1944 Serial N0. 535,603. 16 cla ms. 1.01. 30-232) The invention relates to certain new :and use- .ful improvements inholders :of the class in which a safety razor blade :of "the double ledge type is :heldrforsharpening as by:a:str.op. The invention paaitlculafly appertains t "a holder of the character in which a razor blade is placed between two plates in .a manner to expose an edge portion to be sharpened. One of the plates has a handle, .and the other is detachably connected by means including a collar which is so devised as to bring about a locking 'engage ment by an axial movement relative to said handle, whereby the blade is securely clamped in place.

The aim of the present invention is to provide an improved form of securing means for the detachable plate, which is highly efficient in operation and can be manipulated quickly and easily without having to slide or shift the collar axially along the handle.

A further object of the invention is to provide a holder which is cheap to manufacture, and one in which the component parts may be mouldably produced of a plastic material.

The invention comprehends a holder in which the means for locking the plates in clamping engagement about a blade comprise a detachable connection at the outer ends of the plates and a collar having a cam end face in spiral form extending from a slotted portion for engaging a shoulder on a shank which is inserted in the slot so that upon turning the collar the plates will be urged to clamp an interposed blade.

The collar is turnably mounted on the handle that extends from one of the plates and engages the adjacent end face thereof. tends from the other plate andthe shoulder thereon is formed by a radially disposed nodule.

The invention is illustrated in the accompanying drawing in which like numerals of reference denote corresponding parts in each of the several figures.

In' the drawing, Fig. 1 is a perspective view of the bottom plate which is supplied with a handle on which the collar is disposed. In this view the collar is removed from its true position next to the plate in order to show the cut-away portion of the handle on which it loosely fits.

Fig. 2 is a similar aspect of the top plate.

Fig. 3 is a perspective view of the assembled holder with a blade clamped therein.

Fig. 4 is a longitudinal section of Fig.3.

Fig. 5 is an end view of the collar.

Fig. 6 is a sectional aspect of the collar taken on line 6-6 of Fig. 5.

The shank explate and is desirably New, in the selected embodiment herein delineated it will be seen that the bottom plate I10 and the top taper in 'cross section to .a common side from which a razor blade i2 protrudes when held thereby so that the exposed edge may contact a .stropzin the sharpening operation. Theusual locating ridge :13 npstands from the bottom plate :for fitting into the :azperitured lblade so as to properly position it. The ridge registers with a slot l4 in the top plate, and in the present instance is made much shorter than said slot to permit the top plate to slide endwise for the purpose of its attachment and removal as will later more clearly appear. The handle I5 is a unitary part of the bottom of round shape in cross section, The portion immediately adjacent the late juncture-is cut away as at l6 equable with the proper surface of the bottom plate for a length slightly in excess of the length of a collar l'l which loosely encircles the same. The collar abuts the inner face l0 of the bottom plate and is free to turn on the handle. The portion of J the handle which is cut away is less than half of the diameter thereof and the segmental space thus provided is encircled by the collar.

The collaris supplied with a slot l8 running lengthwise and open to the ends thereof. The

bore of the collar is enlarged at its outer end to provide a counterbore having a thin wall If! and an inner radial face 20 which is fashioned as a helical cam surface, as will be best seen from an inspection of Figs. 4 and 6.

The top plate H is supplied at its inner end with an integral shank or member 2| which in section is a segment of a circle complementary to the part 16 of th handle which is reduced. The shank 2| is of a fit to slide freely in the collar and has at its outer end an integral tit or nodule 22 projecting radially of its circulartop surface. The tit or nodule fits into the counterbore and is adapted to be engaged by the cam surface when the collar is turned. The cam surface urges the tit or nodule axially in the direction of the outer end of the handle and thus draws the top plate into abutting engagement with the inner end of the collar to compose a secure locking connection.

The outer ends of the plate Ill and II are detachably connected as by the provision of a slot 23, which extends inwardly of the outer edge of the plate I0, and a downwardly curved clip or hook 24 which fits into the slot 23 and engages the edge 25 thereof to co-act with the collar in detachably clamping the top plate.

plate M are of wellknownshapeand when sharpened can be quickly removed by a reverse movement of the collar.

What I claim is: 1. A holder of the class described comprising a bottom plate and a top plate ,between which a razor blade is interposed for stropping ofan edge exposed thereby, and means for detachably connecting adjacent ends of said plates to clamp the interposed blade, said means at one end of said plates including a member projecting'from the edge portion of said bottom plate and being of a circular cross section intercepted by a fiat face at the inner surface of the bottom plate, a collar sleeved on said member for turning movement and limited against inward axial movement, said collar having a lengthwise slot and having 'a radial face spirally formed to provide a cam at the outer end thereof, a shank projecting from the edge portion of said top plate and being a cross section complementary to said member for insertion in said collar inwardly of the slot thereof, and a nodule carried by said shank for engaging said cam after it has been passed through said slot in the insertion of said shank.

2. A holder as claimed in claim 1, in which the said member projecting from the edge portion of said bottom plate constitutes a handle.

3. A holder as claimed in claim 1, in which the said member projecting from the edge portion of said bottom plate constitutes a handle which is round in cross section and cut away at its inner end to provide the flat face referred to, that is at the inner surface of said bottom plate.

4. A holder as claimed in claim 1, in which said collar is shouldered against the said edge portion to preclude inward axial of said bottom plate movement. a

5. A holder as claimed in claim 1, in which said cam is formed within a counterbore and is operative to secure the top plate with a clamping eifect. 6.'-A holder as claimed in claim 1, in which the means at the other end of said plates for detachably connecting adjacent ends thereof comprise a slot provided in the bottom plate, and a hook fashioned on the top plate and adapted to have firm locking engagement with this slot LOUIS E. HANSEN.

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