US86389A - Improvement in mortisinq-machines - Google Patents

Description

Il4 FETES. PH GRAPIIER, WASHINGTON D C die ritmi time D. L. GIBBS, OF WORCESTER, MASSACHUSETTS, ASSIGNOB TO R. BALL vAND COMPANY, OF SAME PLACE.

Letters Patent No. 86,389, dated February 2, 1869.

IMPROVEMENT IN MORTISING-MACHINES.

The Schedule referred to in these Letters Patent and making part of the same.

Know all men by these presents That I, D L. GIBBS, of the city and county of Worcester, and Commonwealth of Massachusetts, have invented certain new and useful Improvements iii Mortising-Machines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanyingdrawings, forming a part of this specification, in which- Figure 1 represents a front View of my improvements in mcrtising-machines.

Figure 2 represents a view of the right-hand side of my improved mortising-machine.

Figure 3 represents a rear View of the same.

Figure 4 represents a central section on line A B, fig. 1.

Figure 5 represents a horizontal section on line C D, lig. 2.

Figure 6 represents a plan view ot tnechain-wheel and hand-lever, the wheel being made somewhat differently from the one shown in the previous drawings.

Figure 7 repr'esents a front view ofthe chain-wheel and hand-lever shown in lig. 6.

To enable those ,skilled in the art to which my invention belongs, to make and use the same, I will proceed to describe it more in detail,

The nature of my invention consists- First, in the peculiar combination and arrangement of devices for turning or reversing the chisel, as hereafter described.

Second, in the arrangement of mechanism, as hereafter described, for reversing the chisel in mortising-l machines, so that the same may be operated either by power or by hand.

Third, in the arrangement of certain devices, in the peculiar manner shown and described, for connecting the treadle-rod to the treadle, whereby the length ot' the -stroke may be regulated, as hereafter set forth.

-Fourth, in the arrangement, in a power-mortising machine, of the devices shown in the drawings, as and for the purposes ,hereafter described.

In the drawings, the part marked A is the main frame,B, the driving-shaft, and G, the crank-wheel, all of which are constructed in the /usual form and manner, and will therefore need no further explanation.

Upon the front part ofthe main frame A is arranged the slide D, carrying the chisel-spindle E, theaformer being operated up and down, between its guides F, by means of the connecting-rod G from the crank-wheel G.

The chisel-spindle Eis supported by bearings D', projecting from the slide D, and bearings H are secured to the faces ofthe guides F, which support the beltor chain-wheel K, by means of which the chiselspindle E is reversed.

The chain-wheel K is furnished with a spline, which titsinto a longitudinal groove out in the side ofthe spindle E, and its outer surface may be madewith agroove around it, as shown in g. 4, or with projecting points a, as indicated in gs. 6 and 7, to it betweenthe links ofthe chain, and prevent it from slipping upon the surface ofthe wheel, when a chain is used.

Below the pointed or grooved portion, in theface of the wheel K, at opposite points, are formed two notches, c, into which the end 2 of a catch-lever, I, enters, to hold the wheel K and chisel-spindle E in position while the mortises are being cut.

A hole, b, is also made in the face of the chainwheel, to receive the handle d, when it is desired to reverse the chisel by hand.

Pins are placed in the notches c toreceive the wear causedby the end 2 of the catch-lever I, and they can be easily replaced when `worn out.

rLhe catch-lever I is hung upon a pivot,c, secured in the side of the main frame A, and made adjustable by a'set-screw, f.

The ,upper end of lever I is projected backward, forming a beak, g, and the lowerend, 2, projects forward, and passes through a slot cut for that purpose in `the slide D, where it is held in contact'with the chain-wheel K,by means of a spring, J, secured to the front of the main frame A, and resting against the top end of the lever I, all of which is fully. indicated in the drawings.

In the interior of the main frame A, near the back,

is placed a pulley, L, having, in this instance, upon its surface several grooves, and when the pointed chainwheel is used, it also has rows cfpoints similar to those upon said wheel.

The pulley turns upon a stud, M, secured to a forked support, N, by a nut, M, and by means of which the stud M may be adjusted back and forth, to tighten the belt, or chain m, which transmits motion from the pulley L- to the chain-wheel K and chisel-spindle E.

The forked support N is secured to the mainframe A, and made adjustable up and down by having fastened to its rear end, slotted ears N', which extend out, ward upon the back of the frame A, and through which pass bolts or screws It, as indicated in the drawings.

The pulley L derives its motion from a pulley, 0, upon the driving-shaft B, by means of a belt, p, which passes down under grooved pulleys u, placed at the sides of a stud, P, which projects from the rear of the machine.

The stud P is cast upon a plate, O', that-is formed with slots i, through which the bolts or screws k pass, that secure it to the main frame A, and it is thereby made adjustable.

Holding-pins, 2:, are placed in the sides of the stud P, outside the grooved pulleys n, to prevent the `belt p from being thrown oi.

Secured to the treadle-rod Q, which connects the treadle R with the bearing f1-ame, B', of the drivingshaft B, isan adjustable collar, or slide, S, to the top side Aof which is pivoted a dog, t, as shown in iig. 4.

When the trcadle-rod is moved down, the point of the dog rises, which allows it to pass freely by the beak g, at the end of the catchdever I, butwhen the treadle- `rod'Q rises, the point of the dog engages the beak g,

and throws it forward, which operation moves the lower end of the catch-lever I out of the notch c. upon the chain-wheel K, and allows it to turn.

rIhe lower end, 2, of the catchlever I, may also be moved back by the hand-lever T, which is pivoted to the plate U, fastened to the side ofthe main frame A, through which the hand-lever 'l passes, with its end resting against the front side of the catch-lever I, and` by means of whi'ch the latter can be held back, by drawing the outer end of the hand-lever T forward, and retaining it in that position by the latch w, as indicated in red lines, fig. 5.

Projecting from each side of the main frame A are latch-pieces u, which hold the chisel in position when the reversing is performed by hand, with the handle d. At the lower end'of the treadle-rod Q is a collar, V, agains'twhich presses the Ispring S', which holds the working-parts of the-machine in an elevated position.

An adjusting-device is arranged at the lower end of the treadle-rod Q, which consists of two metallic plates, W and Z, one of which is attached to the end of the treadle-rod Q, and the other is pivoted to the treadle R.

Their joining faces are serrated, and they are clamped together by a bolt or screw, y, the plate Z being slotted to admit of itsbeing clamped in different positions, to adjust the tieadle to the desired position to be operated conveniently, and with the greatest ease to the operator, while cutting mortises of different depths.

When the mortises to be cut are of great depth, a long stroke of thevtreadle is required; therefore the plates W and Z are clamped together, with'the lever at the highest position to which it can be raised, thus giving the full sweep of the treadle from top. togbottom of theopening. But when the lnortises are to beshallow, the plates W and Z are clamped with the treadle, but partially raised, according to the depth of inortise required, thereby obviating the necessity of the operator raising his foot any higher than is actually required to clear the chisel from the mortise. In this manner much time and labor are saved.

Bars 3 are arranged across the interior of the frame A, to prevent the treadle-rod Qfrom springing, and allowing the dog t to pass the beakof the catchlever without engaging and operating it.

The operation is as follows:

The machine being in motion, theetreadl'eR is pressed down, which allows the dog t to pass beneath the beak g of lever I, and also loosens the belt p. Then, when the mortise is cut far enough in that direction, the pressure is' removed from the treadle R., and the driving-shaft and pulley O being raised by the power of the springs S, the belt p is tightened, so that it will operate pulley L, and at `the same time' the dog t, in passing the beak g, throws the lower end, 2, of the catch-lever I, for an instant, out of the notch c in the chain-wheel K,whicl1 is, with the spindle E, turned by means of the belt or chain m, around until the catch-lever I enters the next notch upon the face of the chain-wheel K, which being at the opposite side, reverses the chisel-spindle E and chisel.

When, from accident or otherwise, it becomes necessary to reverse the chisel by hand, vthe belt or chain lm is thrown 'off from the chain-wheel K, the catch-lever I is latched back, and the handle d screwed into the opening b, as shown in red lines, iig. 5. rlhen, by moving. the handle d from side :to side, the chisel-spindleY as indicated by red lines,riig`.' 5., and the chisel will be automatically reversed, by means of beltp and belt or chain m., operating as before explained.

Having described my improvements in mortisingmachines,

What I claim therein as new, and of my invention, and desire to secure by Letters Patent, is

1. The combination, with the chisel-spindle E, and pulley K, and belt or chain ym, ofthe pulley L and belt j), substantially as and for the purposes stated.

2. The combination, with pulley L, frooved pulleys n, and driving-shaft B, of the belt p, substantially as and for the purposes set forth.

3. The combination, with belt p and grooved pulleys n, of holding-pins ac, as and for the purposes shown and described.

4. Ihe arrangement of the spindle E and wheel K with catch-lever I and spring J, substantially as and for the purposes stated.

5. The combination, with treadle-rod Q and catchleverlr, of the hinged dog t, collar or slide S, either fixed oif"adjustahle, substantially as shown and described.

o'. The arrangement, with Vtreadle-rod Q, of the steadying-bars 3 and hinged dog t, as and for the purposes stated. y

7. The arrangement of the chisel-spindle E, pulley K, catch-lever I, and hand-lever T, reversing-handle l1, and vlatch-pieces u and w, substantially asand for vthe purposes set forth.

8. The arrangement of the sliding or bearing frame B, treadle-rod Q, treadle- R, adjusting-clamp plates .Z W, screw or bolt y, all the parts being constructed as shown and described.

9. The arrangement, with frame A, of the mechanismY herein described, for reversiugthe'chisel by power or by hand, asgshown, and -for the purposes set forth.

D. L. GIBBS.

Witnesses:

Trios. H. DODGE, GHAs. H. BURLEIGH.

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