US1280203A - Device for cutting dovetails and the like. - Google Patents

Description

G. GALL/UIN.

DEVICE FOR CUTTING DGVETAILS AND THE LIKE. APPLicATIoN man APR. I6. 1917.

@,Q Patented 001s. 1, 19125.

G. GALLATIN.

DEVICE FOR CUYTING DOVETAILS AND THE LIKE.- APPLmATloN man 111111.16. 1911.

GOELE'I' GALLA'IIN, 0F NEW YORK, 1\T. Y.

'EVICE FOR CUTTNG DOVETAILS AND THE LIKE.

Specification of Letters Patent.

Patented filet. il., i918..

Application filed April 16, 1917 Serial No. 162,342.

To all -w/wm if 'may concern:

Be it known that, I, (onnn'r (iALLA'riN, a citizen ot theI hinted States, residing at. lvew -York city, in the county and State ot New York, have invented certain new and useful lmproven'ients in l)eviee v tor Cutting Dovetails and the like7 of which the following is a epeeitieation.

'The object. oi" the present invention is to enable dove-taile, miters and the like. to be cut mechanically without the necessity oi measuring or manually guiding the work.

Figure. 1 is a perepeetive oi' a. device embodying the invention.

Fig. 2 is a vertical section of the same on line :3--2 of Fig. 6.

Fig. 3 is a detail vertical section on lino ot Fig. S oi the adjustment, mechanism.

Fig. i is a. detail .section on lino tdt of Fig. 2l.

Fig. 5 is a plan view ot a dial plate.

Fig. 6 is a rear elevation partly in section.

Fig. t5 is a vertical crosS section ot a fret;-

. menta to bring the Saw in mechanically ae.-

curate'position tor dove-tailing` mit-er-cutting or theA likc. l have also provided in Figs. 7 and 7 for a moditic-ation in which the yoke is attached directly to the work by n'ieans other than the vise arrangements Iahown 4in the other tigures.

Figs. 1 to ti and l*`ig. ti show a. moditication which brings ont the three movements which are characttwiatic ot the preterred torni ot my invention. rl`his. preferred vtorni also diii'e-rs trom previous. devicenl ot thisl character ingthat the. voke haa` a motion parallel to the vise joining arm. ln the ordinalv form of vise,` the vise joining arm is found underneath the vise arm. and this prevents the cutting of a dove-tail on long pieces of wood.

ln my device, a dove-tail can be cut on pieces of wood ot any length since the vise joining arm is at the. side of the device and not underneath it. Similar symbols are used to denote the various parts `in cach ot the figures. The workis held rigidly by vise sections 1 having jaws :2, and connecting arms The vise section is stationary and integral with the vise arm 3, but the other vise section is t'ree to nieve, in a horizontal direction, being provided with a dovetail groovel 33 in which the free dovetailed end of the visl arm slides. A long screw 5, manipulated by its handle runs through this tree end in the groove of the vise section and when the handle of the screw is 1nanipulated the tree end ot' the vise is brought t0- ward the, other end. The work 31 is thus tirmly gripped by the jaws ot the vise for cutting by the saw after adjustment hereinafter explained.

'lhe iii-st movement which thc device permits is to bringr the. saw-guide over the work. Tl i saw-guide is carried by a yoke-shaped member T. having' dove-tailed bases 31, one oitI which freely slides in the dove-tail groove (i o't one ot' the vise sections while the other mounted in a long screw 11 which yrests in the dove-tail groove t3 ot' the other vise section and has a `generally hori'fzontal motion in the slot when the handle 12 ot' the screw ll is turned. A movement ot' the handle gives this horizontal motion to the entire voke aud the saw-guide which is carried b v it. The tunction oi this portion of the mechanism is therefore to bring the sawguide over the work.

'lhe second movement. permits adjustment to the work so as to make a eut at any angle -in any plano ot the. quadrant at right angles to the yoke; that into say at horizontal anglen` to the work. The saw is placed in the guide 2t), and held high in tie groove 21 with the blade not touching` the Work, b v meanh` oi wingnut 1 22. 'lhc set screw 18 ot' the bracket bearingY iti is then turned, re leasing thedove-tail rgripping' portion .15 ot litltll the ln'iu-.ket-lnaring. part 15 is slid alongr the dial il ot the dove-tail projection 13 on the yoke 7 until the angle. desired to be eiitdis obtained. as noted on the dial. Then the set Screw I8 is tightened at this 'point until it presses on the slotted bolt 30 which in turn itl@ presses on the ilove-tailed projection 13 of the voke and holds the bracket-bearing and l saw-guide rigidly in position at the desired angle on the quadrant scale. It only remains now to determine the vertical angle of the cut to be mechanically determined and fixed. This is accomplished by rotating hand wheel 17 until the desired angle is obtained and the point on the' dial 26 of the bracket-bearing registers with the vpoint on the rim-dial 8 of the yoke. vThe dial 26 is provided with a key-way pin 29 which couples the dial with shaft of bolt 28 and prevents any shifting of the dial. In order to prevent the set-screw from forcing the slotted bolt 30'against the projection of the long screw 28 a spring 27 is placed in the aperture as shown.

The saw 24 is released by revolving the wing-nuts and falls intothe contracted portions 23. The saw then registers the required anglc with work 31 and this angle can be maintained for any depth required. In the same way the device can be adjusted to cut exactly similar angles on the opposite j side of the work. By means of this invention We can make cuts at angles to the vertical or horizontal by mechanical means with absolute accuracy. The sections of the vise are screwed together by means of screws 4.

`It will be observed that for dove-tails of conventional cut, one fastening or the other will be kept at O". For instance, in cuts where the vertical cross sections throughout the dove-tail are identical, the bolt 17 is permanently fastened at 0 on the small dial 26, so that the plane of the saw is always at right angles to the yoke. In the other usual form Where the vertical cross section of the Ycut diminishes toward the back thereof, the screw 18 permanently fastens the sawguide on the yoke at 0, but the saw-guide -is free to move in vertical angles.

My device is also adapted tosever the dove-tails from the Wood. In dove-tails of the male class, the operation is simply to turn the wood on its side bringing the line to be severed under the blade of the conventional saw with the dials at 0. When the dove-'tails are of the female class I may em-4 ploy a 4fret-saw having a holding portion of rigid material as shown in Fig. 6. The

fret-saw 40 is mounted on two arms 41 lby means of pins 42, which arms are fastened or integral with a rigid back or holding por` tion 43, and a handle 44. The method of operation is to fasten the holding portion 43 of thc saw to the saw guide with the dials at 0. The saw blade 40 is of such narrow width that it will easily slip into the grooves of the cut dove-tail even at right angles to the grooves. The fret-saw is slipped through'and along the dove-tail grooves cut in the Wood until the Wood is in a position generally parallel with the vise arms and the saw-is in a through that portion uof the wood which holds the dove-tail to the main body of the.

portion while the dove-tail is being severed.v

A space of from 3 to 4 inches will usually be found suflicient.-

A special construction is shown in Figs. 7 and 7a by which wide boards can have a series of dove-tails sawed thereon. In Figs. 1, 2 and 6, the doveftail bases 9 of the yokeshaped quadrant are shown to-be fastened in dove-tail grooves 34, by means of screws 35, and the grooves 34 have dove-tailed bases so as to fit in the dove tail grooves 6 of the vise sections. The object of this special construction is to enable the entire yoke and the saw-carricr to be lifted out ofthe vise and fitted into a reinforcing yoke 36, for the special work above set forth. In Figs. 7 and 7' the yoke and carrier are indicated and thc arms of the lower fastening yoke 36 are fitted with a ledge 38, having dove-tail grooves so that the bases 9 'of the quadrant yoke can be fastened therein by screws 37.

The dove-tails are marked ofll on the Work4 39 which is placed between the work bench and the device, the ledges of the lower yoke resting on the work thus firmly holding it in position. I

The device can be made so that the yoke cannot be removed7from the vise sectional and in that event parts 9 andv 34 in Fi 1 vare in one piece and pin 35 not require The device has a wide range of work and is adapted to make cuts at angles to the vertical or horizontal in wood or metal and turn out mechanically perfect moldings, drawer parts or any wood or metal art where such angular cuts are required. formed on boards of any length owing to the position of the vise ar Having described my4 invention, what I claim is: i

position to give a vertical out ove-tails can be 1. A device of the character described comprising: slidably connected supportin members having work-holding Jaws, a. rlgl are .shaped member whose free bases strad- 'dle the jaws and are slidably carried in the supporting members to admit of adjustment of the latter andv of itsown adjustment With respect to the latter, and a saw guide adcarried by one of said supporting members, 136

Lesbiens lstraight line adjustable connecting means between said joining member and the other of said supporting members, a Arigid are shaped member Whose free bases straddle the 5 jaws and are slidably earried inthe supporting membersfmeans connected to that Vsupporting member which. carries the j oinng member for slidably adjusting the are Shaped member in a line parallel to the adangles to each other carried by said are shaped member.

GOELET GALLATEN.

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