US1497067A - Electric handsaw - Google Patents

Description

June 10 1 924.

w. P. CASEY ELECTRIC HANDSAW Filed Dec. 2. 1921 3 Sheets-Sumar` 1 w N QN WN .Il Y,

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June 10, 1924 INVENTOR.

Wham F. Casey June I, 1924.

W.. P. CASEY ELECTRIC HANDsAw Filed Dec. Z. 1921 25 bneets-Sheet m. .W N M M m m ,w my B m \n\ State of Wisconsin,

-which the number of Patented June 1o, i924.

WILLIAM PQ CASEY, 0F OSHKOSH, WISCONSIN. vASSIGNDR T0 THE ROUTER. MANUFA@ TUBING COMPANY, OF OSHKOSH WISCONSIN, A CORIORATION OF WISGDNSD.

ELECTRIC EANDSAW.

Application tiled December 2, l821.

l'gi il whom it 'may concern:

11de it known that I, VVILMAM l". C/isEY, a citizen of the United Oshkosh, in the county of VVinnehago and have invented new and useful Improvements in Electric Handsaws. of which the follgwing is a description` reference being had to the accompanying drawings,.which are a part of this specification, l

This invention relates to certain new and useful improvements in tools and refers more particularly to a portable general utility tool especially adapted for use in the Woodworking art.

One df the objects of this invention resides in the provision of a compact unitary tool for general woodwork adapted to be used as a portable electric saw with various types of cutters or convertible for use in the metal-working art by replacing the cutter with' a tool of the proper character.

It is another object of this invention to provide a device of the character described in which the topl arbor is journaled in a rotatable member or drum to permit ready adjustment of the arbor, a drive motor having a positive drive connection with the tool arbor so that adjustment of the drum will not, in any manner, interfere with the arbor drive.

This invention has for a further object to provide a tool of the character described in parts comprising the same is reducedto a minimum to'thus produce a tool having all the desired eliiciency with a minimum number fof parts, whereby its production at a compgtratively low cost is ssible. i

t is a further object of'this invention to provide a tool of the character described having means whereby the device may be set for operation at a predetermined depth with the least possible trouble and absolute accuracy to thus increase in `reneral the eiliciency of the machine.

A still further object of this invention is to rovide a device of the class described inciiiding a frame constructed to be moved over the sgrface to be worked upon and YJrovided ...Bh guidin grips or handles figmed on op4 iiaen s thereof, the handla at that e mths machine mounting the States, and resident of Serial 11'0. 519.414.

tool proper being preferably in the form of a saw gri A still to provide so designed and constructed that the movi parts thereof are assured ample lubrication for the eliicient operation of the tool with l minimum of friction,

W'ith the above which will appear'as the description. proceeds` my invention resides in the novel coustruction. combination and arrangement of parts substantially as hereinafter described and more particularly defined b pencled claims, it being understoo changes in the precise herein disclosed invention may be made as come within the scope of the claims.4

In the accompanying drawings, I have illustrated one 'complete example of the physical embodiment of my invention oonrtlier object of this invention is `structed according to the best mode I: have so far, devised for the practical ap lisationof the principles thereof, and in w ich:

Figure 1` is a side view of altool embodying m`y invention, parts being broken and .in section to tails ofoonstruction;

Figure 2 is a view looking at the tool carrying end of the device, a. rtion of the frame beingl broken away an in section to more clearly illustrate the means employed for obtainin the ready adjustment of the depth at which Figure 3 is a fragmentary view in trana v erse section taken through Figure 1 on the line 3 8;

Figure 4 is a fragmentary detail view part in elevation illustrating n screw means for rotating the drum j member to obtain the ready adjustment of part in section and the tool arbor, and

Figure 5 is a fragmentary detail view taken on the plane of line 5-5 of Figure 2. Figure 6 is a plan view. Referring now more accompanying drawings, in whichlike numernis designate like parts throughout the I seylehral views: l d

e numera 6 esignates a support' frame, which may be of any desired shag?,

but is illustrated in the drawings Il 0f Fulkl n tool of the character described l and other objects in view tlie ap-4 i' that such embodiment of the away. more clearly illustrate 'dethe cutter properl operates;

particularly to lille4 p 'ai of the varmature shaft. 4Ample and suitable stantially rectan lar form; 7, an end plate member, prefers ly in the form of a split ring and made fast to one. end of the frame by suitable fastenings 8; 9, a handle member, preferablyof the saw grip type, attached to a web or projection .formed on end plate 7; and 10, a handle or grip mounted at the end of the frame opposite plate 7 and secured vbetween two spaced parallel extensions 11 extended from the frame. The major portion of the base of frame 6 has supporting ribs or lugs 12 formed thereon, but one being shown in Figure1, upon which rests a drive motor 13, the motor being made fast bysuitable fastenings 14, ribs 12 being preferably shaped to conform with the motor casing.

One of the bosses 15, forming the bearings for the motor armature shaft 16, pros jects into a drum member 17 throu h an opening 18 in the inner wall thereo said member being rotatably mounted in the Vspl-it rin 7, as illustrated in Figures 1 and 2. Mem er 17 is rotatable about the motor boss 15 and `is readily releasably secured in any desired position of adjustment by drawing the split en ds 19 of ring? t ther by a binding nut 20. v nge Member 17 has its outer end closed by a removable cover or end plate 21, and extending therethrough, offset with respect to the center thereof, is a bore 22 in which are mounted suitable bearings 23, preferably of the ball bearing type, for journally mounting a tool arbor 24.- The outer end of arbor 24,projects through a bored cylindrical projection 25 extended beyond cover 21 and receives a suitable tool 26, illustrated in the present instance in the form of a cuttin saw. The innermost bearing 23 is held 1n place by a cap or plug 27 closing the rear end of bore 22 and the outer-most bearing 23 is secured in place by an annular member 28. The inner perlphery of member 28 is annularly channe ed to receive a, suitable packing 29 for engagement with a hub 30 of a lian member 81 which, with a disc 32 an .a lock nut 33, secure tool 26 to its shaft,24.

A countershaft 34 is secured in a bored projection 35 formed on the inner wall of member 17, and journaled thereon is an idler or intermediate gear 36 which meshes with a pinion gear 37 fixed to amature shaft 16 and a pinion gear 38 mounted on arbor 24. With this arrangement of power transmission, it will Abe readily obvious that member 17 may be readily rotated to any position of adjustment to vary the depth of theeut of tool 26 without in. any manner disturbingthe drive connection between the armature slaftgand tool arbor by reason of the drive gearstin the adjustment of member 17, describing an arc about the axis extension 25, as illustrated ,in iglure 1, this guard being adjustable about t e axis of arbor 24 in order to best protect the operatot from danger of yin -chips thrown by thecutter irrespective b the depth at which thel tool is bein operated. The guard is referably in. t e form of a. segmental 'p ate having its medial portion flanged and apertured to engage over projection'25 and its outer edge ortion-ilanged or struck laterally to exten over the tool.

vFor convenience to the o rator in stopping and starting the too a controlling switch 42 is set within the circuit, of motor 13 and positioned at a suitable convenient point in reach of 4one hand of the operator whereby the tool may be instantly stopped without necessitating its removal from the work or the withdrawing' of his hand from the tool.

As will be readily obvious from the above description, the depth at which tool 26 op-Y crates, is readily adjusted by means of member 17, as the nearer the axis of arbor 24 approaches. an imaginary vertical line run ning through the axis of member 17 the deeper the cnt, and in order to facilitatev the exact setting of the tool to operate at any given depth the hereinafter described means is provided.

The peri hery of member 17 has a rib or flange 42 firmed thereon a. slight distance inwardly'I ofI member 7 to provide a space for receiving a ring 43 rotatably mounted about member 17. A rtion of the inner periphery of ring 43 is provided with an elongated recess 44 in which u dat spring or other suitable binding member .45 is sitioned, a binding screw 46 bei operable to force spring 45 against mem r 17 to make the ring fast thereto in any desired position of ladjustment.

Either member 17 or ring 43 has a master line or center point delineated thereon, and

the other a series of graduations and when it. is the desire of the operator to make a three sixteenths of an inch cut in the work, ring 43 is rotated to aline the three sixteenths of an inch ,graduation the master line. when the ring is mede fast to' member 17 by the binding screw 46. Member 17 is then rotated to engage a lug or projection Ii'f-carried by ring 43. with a lug or projection 48 carried by member 7, when member 17 is locked against rotation' by llll drawing split ends 19 together by manipulau.

mozos? tion of nut 20. Thus it will be seen that l accurate adjustment of the depth at which the tool 26 operates is readily obtained with the least amount of effort on the part of the operator.

If desired, ring 43 may be dispensed with and member 7 made into the form of a one piece ring in which member 17 is rotatably mounted, said member bein moved to any position of adjustment and eld against rotation by the construction illustrated in Figure 4. This modiiication of my invention consists in journalinga worm shaft 49 in memr 7 upon whic is mounted a worm gear 50 which communicates with the inner periphery of said member and meshes with a worm wheel 51 formed on the riphery of member 17. Shaft 49 is secur in lace' by a screw collar 52 and has a knurl nut or head 53 on its out/cr end for readily rotating the same. In this form of my invention either member 7 or drumfl'( has a master line or center int thereon and e other aseries bf nation whereby fact adlh justmntbf t de th at jghlch the cutter is to operate may readily made.

From the fore oing description taken in connection with t e accompanying drawings,

` it will be at. once apparent to those versed in the 'nrt to n'hic an invention of this character appertains that I haveprovided a4 portable tool unit capable of use not only in connection A with wood-workin but metal working and any other art w ere the tool will perform its function in an efficient manner, and that. hy reason of its construe'- tion, the same may be tipped on end and operated where the work so requires.

What I claim as my invention is:

1. A tool of the character described hav- 46 adjusting member in a predetermined posi- 1 tion.

2. In a tool of the character described, the combination with a frame member and a drive motor fixed thereto and having one end. rovded with a protruding boss from whic projects a drive shaft, of a drum member journaled in saidv frame member and havi receive said motor boss,said motor drive shaft terminating within said drum memfber, Va tool shaft journaled in said drum member to one side of the center thereof and having its outer end ext/ended beyond said drum memberto receive a tool, a pro jection formed on the outer end wall of said drum member surrounding the projected, end of said tool shaft, a guard member carried by said projection for the tool on the its rear wall centrally bored to outer end of sald tool shaft, and a drive conn'ction located within said drum member for drivinglv connecting said tool shaft with the drive s aft.

In testimony whereof, I atix my si ature.

WILLIAM P. CA EY.

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