US84817A - Improvement in mortising-machine - Google Patents

Description

UNITED STATns ATENT ErroriA D. L. GIBBS, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO It. BALL & CO., OF SAME PLACE.

Specification forming part of Letters Patent No. 84,817, datedecember 8, 1868.

Know all man 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 in Mortising-Maehines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure l represents a front view of my improvements in mortising-machines. Fig. 2 represents a view of the right-hand side of the same. Fig. 3 represents a horizontal section of the chisel-arbor at line A on Fig. 1. Fig. 4 represents a horizontal section of the chiselarbor at line B on Fig. 1. Fig. 5 represents a plan view of the treadle and catch-lever separate from the machine, vshowing their relative positions; and Fig. 6 represents a section through main frame A, showing the manner of hanging the weight for raising the treadle.

To enable others 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, rst, in the peculiar construction, combination, and arrangement of the treadle and catch-bar; second, in the combination and relative arrangement of the treadle devices and devices for elevating and depressing the table, as will be hereafter explained; third, in the peculiar construction, combination, and arrangement of device for turning the chisel and holding it in position 5 fourth, inthe peculiar construction, combination, and arrangement of the boring apparatus, as hereafter described; fifth, in the peculiar combination and arrangement of the cords and weight for raising the sliding head, chisel-arbor, and treadle.

In the drawing, the part marked A is the `main frame; B, the driving-shaft, to which the power is applied through the pulley B', and C, the cranlrplate, all of which are constructed and 'arran ged in the usual form and manner, and will not therefore require further explanation.

The base A', upon which the main frame A rests, is made to extend farther from the frame at the front than at the sides or rear, and has square projections a a at each side of the treadle D. Upon the top of these projections a are standards E, which support the shaft F, having upon it two pinions, F',that mesh into racks Gr extending downward from the table H, and by means of which the table H is raised or lowered, and also, in combination 4with the standards E, form a direct support for the table from the base A.

To the end of shaft F is fixed a hand-wheel. b, by which the shaft and pinion can be turned to elevate and depress the table H. Above this shaft is another small shaft, e, upon which are fastened dogs c'. These fall between the teeth of the pinions F, holding them in any desired position.

lVh'en the pinions are to be turned, the dogs are raised by means of a hand-lever, d, upon the end of their shaft o.

To the front of the projection a on the base A' are secured two plates, I, which are bent at a right angle, and project forward at each side of the treadle, as shown in the drawings, and between which the treadle D rises and falls. Holes e are made in the projecting portion ot' these plates I, and a pin, f, inserted, againstwhich the treadle D strike-s as it rises.

By placing the pin f in the different holes the height to which the treadle rises can be regulated.

The pin fis prevented from working out of place by a key passing through its end.

The treadle D is made in the usual manner, being pivoted inthe interior of the frame near the back side, and extending forward through an opening in the front of the frame A. It is connected by a rod, D', to the bea-rings x of the driving-shaft B, and by means of which the latter, in connection with the chisel-slide, is brought down.

One end of a cord or chain, z, is attached] by a collar, v, to the treadle'rod D', its other end being fastened to the smaller circumference of the double-grooved pulley Z, arranged in the interior of the main frame A, just be neath the sliding bearing x of the drivingshaft B. To the larger circumference of said double-grooved pulley Z, at the opposite side,

from cord z, is fastened another cord, z', having attached at its lower end a weight, D", which han gs in the interior of the main frame, as indicated in the drawings, Fig. 6.

By the above arrangement of cords, pulley, and weight, the sliding bearing, chisel-arbor, and treadle are raised when the fastening or pressure is removed from the treadle D, while at the same time a more compact and shorter frame can be employed than would be required if the cords were suspended from the top of the frame above the sliding head.

Pivoted to the front of one of the standards E is an arm, J, extending` downward, and at its lower endis a beak, t', which passes through an opening in the plate I, across the treadle D, and is held in that position by the spring g, which rests against the side of the arm J. In this manner the treadle D is kept down without any pressure from the foot of the operator.

The top of the beak i is beveled off, and as the treadle strikes it in coming down it moves back to let the treadle pass, after which the spring g throws it again into place.

The lower end of arm J passes through the catch-lever K, and is secured by a nut on the under side of the lever.

The catch-bar K is pivoted at its rear end to the under side of the base A', and its forward end rests alongside, the end of the treadle D being curved upward, so that it is somewhat higher than the end of the treadle when the latter is pressed down, whereby the operator can, by turning his foot as it rests on thc treadle D, throw back the catch-lever K, as shown in red lines, Fig. 5, which carries back the arm J and beak t', thereby allowing the treadle D to rise.

The table H is bolted to a slide, 7L, which moves up and down in grooves formed in the frame A. Upon the front of the slide h, beneath the table, are clamp-bolts k, by means of which the table H can be firmly secured at any desired height. Secured to the front of the frame A, above the table H, are guidepieces L, between which works the chisel-slide M, being moved up and down by the rod N connected to crank-plate C. Through projections M on the face of the chiselslide M passes the chisel-arbor 0, carrying in its lower end the chisel m. The arbor O can be turned to reverse the position of the chisel fm. by means of a handle, P, att-ached to a hub or sleeve, Gr, through which the arbor O passes, and which is prevented from turning on the arbor O by a pin or screw, p, in the hub Q, the end of which runs in a longitudinal groove or channel cut in the side of the arbor O. The ends of the hub or sleeve Q t and turn in bearin gs R, which are secured to the face of the guidepieces L, extending across from 011e to the other, as indicated in the drawings.

The chisel-arbor O is retained in position by a spring, S, which is fastened to the back of the slide M, with its lower end projecting forward and resting on a cani, T, in form as shown in Fig. 4, and which cam is secured to the arbor O. By the peculiar construction of the camT the chisel is held firmly in position, and at the same time it offers but little resistance when changed by the handle P, when it is swung around to the position indicated by red lines, Figs. 3 and 4, to reverse the arbor O and chisel m. The points o on the cani T strike against the sides of the spring S, and prevent the arbor from swinging too far round.

Secured to the side of the frame A is the boring apparatus, which I will proceed to de'- scribe. To the studs Z, which project from the side of the main frame A, is fastened a guideframe, U, upon which flts and slides a carriage, V, furnished at its lower side with a rack, V', which engages into a pinion, s, working upon the stud s', and connected to handwheel W, by means of which the carriage can be moved back and forward. At the top of carriage V is a shaft, X, supported by the bearings t and 11'attached to the side of the main frame A. Upon the shaft X is placed the drivin g-pulley Y. It is held to the bearing u by means of a iiange which fits into a groove, y, on the hub of the pulley Y. The shaft X is so arranged that it can slide freely through the bearing u and pulley Y, the latter being provid ed with a spline to fit a longitudinal groove or slot cut inthe shaft X.

At the front of carriage V are bearings 1.1, in which turns an upright spindle, 2, so arranged that it can slide up and down with the motion of the hand-.lever 3, to whichit is connected by the rod 4 and collar 5, as indicated in the drawings. The lower end of. the spindle 2 is fitted to receive the shank of the bit or auger. To the collar 5 is attached a weight, 6, by means of a cord, 7, which passes over a pulley, 8, near the top of the carriage V, and thence down to a hook, 9, secured to the collar 5. A gage-collar, l0, is placed upon the spindle between the lower bearing and collar 5, which can be moved up or down to regulate the height to which the auger rises. A movable stop, 14, is placed upon a standard, 15, beneath the lever 3, which can be adjusted by a screw and hand-wheel, for regulating the depth of hole bored.

The motion is transmitted from the drivingshaft X to the upright spindle 2 by means of a pair of motor-gears,l3, one of whichis Xed to the end of the driving-shaft X, and the other having a spline, which works in a channel in the side of spindle 2.

The operation ofthe boringapparatus is as follows: Turnv the. hand-wheel W until the auger in the end of the upright spindle is over Having described my improvements in mortising-machines, What I claim therein as new and of my invention, and desire to secure by Letters Patent, is-

1. The employment, with the treadle D of a mortising-machine, of a catch or stop mechanism adapted to retain said treadle in its depressed position Without the aid of the foot, substantially Vas set forth.

2. The combination of the arm J, spring g, beak z', and lever K in the manner described, the Whole constituting a catch mechanism arranged to operate in connection With the treadle D, substantially as herein set forth.

3. The arrangement, with the main frame A, of the treadle device herein described and the devices for elevating and depressing the table, as shown and described.

D. L. GIBBS.

Witnesses THos. H. DODGE, D. L. MILLER..

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