US1713727A - Mortising tool - Google Patents

Description

y 21, 1929- J. A. WALLER 1,713,727

MORTI S ING TOOL Filed Sept 1, 1926 2 Sheets-Sheet 1 mum 31 INVENTOR.

JOHN A. WALLE May 21, 1929; J. A. WALLER MORTI SING TOOL Filed Sept. 1, 1926 2 Sheets-Sheet 'IIIIIIIIIIIIIIIMII INVENTOR. JOHN A WALLER iTORNEl Patented May 21, 1929.

UNrrEn STATES PATENT OFFICE.

JOHN A. WALLER, LOS ANGELES, CALIFORNIA, ASSIGNOR TO THE STANLEY WORKS, 011' NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

'MOBTISING TOOL.

I Application filed. September 1, 1926. Serial No. 133,023.

The object of this invention is to provide a tool for forming mortises in doors and the like for the reception of hinge leaves, wherein the cutting knives may be quickly ad justed or removed, whereby the tool may be adjusted for accurate formation of the desired out, and whereby the knives may be positively fed forward by a feeding device whose parts may be easily thrown into inoperative position for quick return of the feeding mechanism to initial position.

The invention constitutes an improvement over that disclosed in my allowed application ,Serial No. 1,812, filed January 12, 1925, Patent No. 1,603,652, Oct. 19, 1926, and comprises a tool frame upon which there are mounted a bottom forming chisel, end-wall forming knives, a back-wall forming knife which cuts off the chip, a gauge for accurately positioning the tool, and a feeding mechanism which includes a sliding yoke having a handle upon which there is mounted a feeding pawl which cooperates with and actuates a locking pawl or dog on the yoke, both of said pawls working upon a toothed rack on the tool frame and being releasable therefrom by movement of the handle. I The invention resides further in the various features, construction of parts and combinations herein set forth and more particularly pointed out in the claims.

In the accompanying drawings, wherein certain embodiments of the invention are disclosed by way of illustration:

Fig. 1 is a top plan of the tool embodying the present improvements;

Fig. 2 is a side elevation thereof;

Fig. 3 is a bottom plan;

Fig. 4 is a transverse view taken on the line el4c of Fig. 2 showing the holder which carries the end-wall forming knives and the gauge;

Fig.

a line 5-5 of Fig. 2;

Fig. 6, a longitudinal vertical section through. the tool;

Fig. 7 is a horizontal sectional detail of the feeding mechanism taken on line 77 of Fig. 6; i

Figs. 8 and 9 are details showing in elevation two other positions of the pawls of the feeding mechanism;

Fig. 10 is a cross sectional view taken on line10-l0 of Fig. 6;

5 is a transverse section taken on the Fig. 11 is a horizontal detail taken from line 11-11 of Fig. 4; and

Fig. 12 is a vertical detail taken on line 1212 of Fig. 11.

The tool frame or body consists of a channel bar 14 between whose side wall is fixedly secured a rack or bar 15 toothed at 16 forcooperation with the pawls of the feeding mechanism as hereinafter described. The rear end of the body 14: carries a bottomwall forming chisel 20 mounted through the medium of a chisel frame 21 slotted at 22 and having upwardly disposed positioning lugs 23 fitting between the side wall of channel 14, said chisel frame being adjustableby means of a screw 24. whose knob 25 projects beyond the frame for manipulation. A pin 26 in frame 14L is received in an annular groove 27 of knob 25 and holds the same against longitudinal movement during adjustment. Depending from the frame 21 is a pair of tapered or wedge-shaped side walls 30 which give the chisel 20 its pitch and against which said chisel is bound. by means of bolt 31 and nut 32, the head of the bolt being shouldered to be partially received in an opening 33 in body 14: and passing through slot 22 0f frame 21, through a slot 34 in the chisel and through'a' slot 35 in a bearing plate 36 which is positioned against the lower face of the chisel and which is directly engaged by the nut 32. For the purpose of limiting the cut in the work, the plate 36 is provided with a pair of laterally extending arms 37 whose extremities are arranged to lie approximately in the plane of the cutting edge of chisel 20. Steadying of the forwardportion of the chisel 20 is accomplished by means of a strap or yoke 41 which passes around body 14- and is provided with fingers 41:2 which engage beneath the edges of the'chisel, a reinforcing bar 43 and a screw 44 being provided for binding said strap against the top of channel 14.

The end walls ofthe mortise are cut by a pair of vertically positioned knives :5 which are adjustably mounted upon a supporting plate L6 mounted transversely on body 14-, said plate also serving as a gauge plate as presently to be described. The knives to are retained by means of a clamping bar 47 having flanges 48 notched at 4:9

to receive one edge of each knife and cooperating with notches 4c9*in plate 46 to isconnected by a bend 58 and in turn has an opening 54 in which also the body 14 fits, thus making it possible to slidably adjust or remove the plate 46.

The back wall of the mortiseis cutby a vertically disposed transversely arranged plunger blade 55 which'serves to sever the chip C after the end and bottom walls have been cut. This blade 55 extends below body 14 'andhas arms55 which extend upward alongside thereof and areadjustably secured i i by means of screws 56 and slots 57 to flanges 58 of a vertically movable bracketlGO, the upper ends of said flanges 58 overhanging the arms of blade 55 as in'dlcated at 58.

The top bar of bracket 60 is reinforced with a plate 62' through both of wh ch there is threaded a positioning pin 64 fora returning spring whose lower end seats in an opening in body 14and rests on toothed bar 15. A small plate 67 which s secured to body 14 by screw 68 is provided at its sides with up standing flanges 69 which bear against the edges of bracket 60'and maintain the same and blade 55 in operative position; "For the purpose of depressing blade 55 to cut out the chip C, a pintle 70 is passed through the r bend 58 of thehooked portion of plate'46,

this pintle serving to mount a yoke-shaped lever 71havinga striking plate 72 whereby a: blow from the operators hand will cause offsets 71 on lever 71 to engage the overhanging portions 58of flanges 58 and degpress blade 55 to cut the back wall of the" mortise.

i For properly positioning the tool to cut the desired mortlseor successive sections thereof, the plate 46 is provided at its lower edge withan angle-shaped 'gaugefbar 73 upon whichsgraduations 73 are provided,

this construction cooperating with an sadjustable slide'75, secured to one end of plate 46 by a set screw 76, a guide 77 being pivoted at 78 tea flange :of the slide 75. Thus,

' the guide 77 may be caused to engage the edge ofa door or window sash or the end'of 3 56661011 or mortise already cut, or it} may with a flat bottom wall 81 having an up;

be swung up outof operative position.

mounted 011 body 14, this device being in the form. of a sliding frame 80 which is looped around the body 14 and is provided turned flaredend and-anoffset ledge forming jointly an abutment jaw 81 to engage I the work for'pressingthe-sameiagainst the mortising elements, 20 and 45. The'side walls of frame 80 are provided with openings 82 and are connected with bolts 83 and 83, while the lateral extensions of a lever '84 project into and workin said openings,

the ends of said extensions having trunnions 85 whereby the lever is fulcrumed 1n the b1- fur-cations 86 of a forked handle pivoted on a pin 87 passing through said frame. The

offset finger 90 which is adapted to engage and ride up on, a cam surface 91 of the depending arm of a locking pawl or dog 92 "pivotcd'oii bolt 88. 9 The upper arm of said dog isiadapted to engage the'teeth 16 of bar 15"to prevent return of theframe 80,while the depending arm 94 thereof is engaged by a spring 95 to force the ,dog up into engagement with said teeth 16, the extremity of arm 94 engaging underpin 87 to limit up-' ward movement of said dog when frame 80' is removed from the tool. The outer end of the pawl 88 is engaged by a spring 96 which tends tourge said pawl into engagement with the teeth 16, such engagement being effected when therear end 89 and the finger and the end-wall cutting knives 45 are adjusted for the desired cuts, and the frame 80 is slid into position onthe body 14with the abutment member 81 engaging the edge of the door D or window sash,and the handle 86 is brought into the full line position of Fig. 8 where the dog 92 and the pawl 88 engage the teeth 16 ofbar 15; c As said handle is moved from said full line position in the direction of the arrow toward the position of Fig; 9, the pawl 88' maintains its engagement with teeth 16 and the frame 80is forced relatively along the body 14 through theniedium of the tru'nnions 85, handle86 andpin 87, the dog 92 riding over the teeth '16, whereby the chisel 20 and knives 45 are forced through the "work. If

the amount of cut formed by a single stroke of the handle is not sufficient, the handle is V returned to the full line position of- Fig. 8, For the purpose of drawing'the chisel 20 during which movement the dog 92 prevents shifting ofthe frame '80, and another stroke is made. hen the required amount of cuthasbeen made by chisel 20, the plate 7 2 is struck whereby lugs 71' of lever 71engage the overhanging portions 58' of flanges 58 and force the blade'55 downward-to cut the back wall of the mortise and sever the chip C. In order to shift the tool along the work to increase the length ofthe mortise, the handle 86 is moved from the position of Fig. 9 into the position of Fig. 6 in the direction of the arrow of Fig. 6, which is the dotted line position of Fig. 8, which movement causes the finger .90 to ride up on the cam face 91 of the depending arm 94: of dog 92, thereby depressing said arm 94, Withdrawing the dog 92 from the teeth 16, elevating the finger 90 and causing the arm 89 to ride over the bolt 83, and at the same time withdrawing the pawl 88 from the teeth 16. This disengagement of dog 92 and pawl 88 from the teeth of bar 15, frees the frame 80 so that it may be slid forward along body 1 1 for repositioning of the tool on the Work. lVhen handle 86 is returned to said full line position, finger 9O disengages cam face 91 and the springs 95 and 96 return pawls 92 and 88 to tooth engaging position. In order to increase the length of the mortise M (Fig. 4) the desired amount, the gauge 77 is swung down into the mortise (Figs. 4 and 12) and the slide 75 on plate l6 is properly set with respect to the graduations on scale 73 to yield the desired cut, the cutting operation being repeated as above.

IVhat I claim is:

1. A mortising tool comprising a body, a knife carrier mounted thereon having a gauge plate disposed transversely of the body, and a gauge adjustable upon said plate for determining the length of cut.

2. A mortising tool comprising a body, a knife carrier mounted thereon having a gauge plate disposed transversely of the body, and a gauge adjustable upon said plate for determining the length of cut, said gauge being also swingingly mounted to move to and from engagement With a Wall of the Work.

3. A mortising tool comprising a channel bar, a chisel frame mounted upon said bar, means for adjusting the position of said frame along said bar, and a bottom-Wall forming chisel adjustably mounted upon said frame.

4. A mortising tool comprising a channel shaped bar, a chisel frame having a guiding member slidable Within the bar, means for adjusting the position of the frame upon the bar, and a chisel mounted upon the frame.

5. A mortising tool comprising a body, a chisel frame mounted upon the body, means for adjusting the position of the frame upon the body, a chisel secured to the frame by means of a bolt passing through the chisel frame and body, and a yoke engagingthe chisel adjacent its cutting end for binding the chisel to the frame and body.

6. A mortising tool comprising a body, a chisel frame movably mounted upon the body, means for adjusting the position of said frame, a chisel secured to the frame, and a yoke engaging the chisel adjacent its cutting portion for binding the chisel in operative position.

In Witness that I claim the foregoing I have hereunto subscribed my name this 2nd day of August, 1926.

JOHN A. WALLER.

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