US591702A - Press - Google Patents

Description

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No. 591,702. Patented Oct. 12,1897.

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No. 591,702. Patented Oct. 12,1897.

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No. 591,702. Patented Oct. 12,1897.

yr an UNITED STATES PATENT OFFICE.

OBERLIN SMITH, OF BRIDGETON, NEW JERSEY.

PRESS.

SPECIFICATION forming part of Letters Patent No. 591,702, dated October 12, 18 97. Application filed June 5, 1896. Serial No. 594,452. (No model.)

To all whom it may concern: Be it known that I, OBERLIN SMITH, of Bridgeton, in the county of Cumberland, andin the State of New Jersey, have invented cer tain new and useful Improvements in Presses; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which Figure l is a perspective view of my press; Fig. 2, a side elevation, partly in section; Fig. 3, a detail top plan view of the indexing mechanism; Fig. 4, a front elevation thereof; Fig. 5, a vertical section on the line LE to of Fig. 4; Fig. 6, a detail perspective view of the parts of the indexing-wheel separated; Fig. 7, a similar view of the work-holder or chuck; Fig. 8, a detail view in section of the means for coupling the pitman and eccentric-strap; Fig. 9, a like view showing the means for connecting the pitman and the pitman-pivot.

Letters of like name and kind refer to like parts in each of the figures.

The design of my invention is to provide an improved punching or cutting press; and to this end said invention consists in the press having the construction and combination of parts substantially as and for the purpose hereinafter specified.

In the carrying of my invention into practice I employ a cast-metal frame that consists of a base or pedestal A and an upright or standard B, rising from the latter and having at its mid-height a bed 0. Journaled in suitable bearings at the top of the standard is a horizontal shaft D, upon the rear end of which is loosely mounted a drive or fly wheel E, that is adapted to be clutched to and unclutched from the shaft by a suitable clutch mechanism F. Near its front end the shaft carries an eccentric G, the strap H of which is provided on its under side with a round opening h for the reception of the round reduced extension 2'- of the upper end of the pitman I. Encircling said extension is a' groove 2", whose upper side is downwardly inclined, into which groove projects the correspondingly-shaped end of a pin K in a horizontal opening that is provided in the cocentric-strap H. Engaging the outer end of said pin is a screw L, by means of which the pin may be moved inward to cause the inclined surface on its inner end to engage the like surface of the annular groove 2' of the pitman and thereby firmly seat the upper end of the latter against the eccentric-strap.

The lower portion of the pitman is threaded, and upon the same is screwed a circular block M, that is journaled in a horizontal opening in the vertically-sliding ram N and constitotes the pivotal connection between the latter and the pitman. In the rear side of said block is a circular opening which extends through to the threaded stem-engaging opening and in which is placed a circular block 0, whose inner face is curved and threaded in conformity to the threaded part of the pitman, and said block 0 is clamped against the latter by two bolts P and P, that are attached to said block 0 on diametrically opposite sides of the pitman and pass outward through open ings in the pivot-block and have each a nut 19 on its outer end, which abuts against the outer face of said pivot-block. By means of the bolts and nuts and the block 0 the connection between the pitman and the pivotblock can be made secure and firm against tendency to loosen from the movement and the jar of parts when the press is at work. In such work as punching a number or series of openings in one piece atregular distances apartas, for instance, the notches in the rims of armature-disks, where an indexing or feeding mechanism is employed-it is necessary that each opening or notch shall be punchedunder precisely the same conditions as the others to insure uniformity in their spacing. Variation usually occurs as to the first opening punched if the punch is allowed to work at the first stroke of the press, since obviously the conditions of momentum and springof material are different at the beginning of the operation of the press from those that exist when the same is at high speed. To enable the first work done by the punch to be under the same conditions as the subsequent work, I provide means whereby the punch may be readily placed in and out of position for operation, so that the press can be run with the punch inactive to bring about the desired condition. Such means consists of a handle or lever Q, that is fastened to the upper end of the pitman and projects to the front of the press in convenient position to be grasped and swung to the right or left, and thus by turning the pitman cause,th rough its threaded connection with its pivot-block, the raising or lowering of the ram, and consequently the removal of the punch from or its placing in position for work.

The handle or lever Q is provided with a downwardly-extending pin q, that is adapted by engagement with the outer face of the pivot-block to limit the swing of the handle, and thus the amount of vertical movement of the punch. Said handle is preferably detachably connected with the pitman,

Keyed upon the front end of the shaft D is a worm R, that meshes with a toothed wheel S upon the upper end of a vertical shaft T, which at its lower end carries a clampingdisk U, that, with a similar disk V, pivoted by a taper stud or pin I) to a table or bolster IV, bolted to the press-bed O, constitutes a chuck for the work, in the form of a disk X, that is to be, punched. The two chuck-disksU and V are coupled to cause them to rotate together by a block or key Y, that projects up ward from the lower disk into a slot to in the upper one. Upon its outer face said key has a vertical projection or rib y, adapted to engage a notch in the disk X to couple the latter to and cause it to rotate with the chuck.

To permit the work to be placed in and removed from the chuck, the upper disk U is vertically movable relative to the others and is raised by means of a cam-lever Z, that engages the under side of a collar 15 upon the shaft '1, and is adapted to raise the latter and with it the wheel S. The lowering of said disk U is effected by gravity, and as the weight of the wheel S and the shaft T are utilized it will be seen that the work X will be firmly held or clamped in the chuck. The shaft T is mounted in bearings 66 and a, that project horizontally from a vertical post or standard A, rising from a horizontal arm B, which is bolted to the table or bolster W'. The camlever Z is pivoted to the post A. Of course during the operation of the punch upon the work the lattermustbeimmovable, and hence it is necessary that the feeding or revolution of the work be step by step or intermittent. To accomplish this result, the thread of the worm R is not continuously inclined, but a portion or portions of its length are arranged in planes at a right angle to the axis of the shaft D, so as to have no moving efiect upon the wheel S. The teeth of the latter, for proper cooperation with the worm, in view of this peculiar arrangement of its thread, have inclined surfaces for engagement with the inclined portions of its thread, while to permit the free passage of the uninclined parts there- 'of they have surfaces that extend in planes parallel with the axis of the shaft T. This device I term a drunken worm.

My peculiar adaptation of the worm-gear affords a most simple, cheap, and yet thoroughly efficient intermittent or indexing feed.

To enable the ready exchange of one wheel S for another of different diameter for the punching of different sizes of work, I make said wheel in the form of a ring or annulus and fix to the shaft T a ring or disk B of slightly greater diameter than the internal diameter of the wheel, to-which the latter is detachably connected by bolts 0' and 0 This construction renders it necessary that the shaft T be movable toward and from the worm R, and accordingly the support of said shaft is adjustably connected to the bolster or table W.

In using my drunken-worm intermittent feed, I do notlimit myself to notching disks and such work, but among other different uses it may be employed when there is attached to the lower end of shaft T a perforated dial in which separate pieces of work, as cartridges, &c., are successively placed to be fed under the punch in the usual manner.

Having thus described my invention, what I claim is 1. In a press, the combination of the toolcarrying ram, the driving-shaft, an eccentric on the latter connected with the ram, the worm on the shaft having a portion of its thread uninclined, a second shaft mounted parallel with the line of movement of the ram, a table, or support, from which rises a standard, or postthat journals the second shaft,

a wheel on said second shaft, meshing with the worm, and a work-holder connected with such shaft, substantially as and for the purpose specified.

2. In a press, the combination of the toolcarrying ram, the driving-shaft, an eccentric on the latter connected with the ram, the worm on the shaft having a portion of its thread uninclined, a second shaft mounted parallel with the line of movement of the ram, a table or support, from which rises a standard or post that journals such second shaft, awheel on said shaft, meshing with the worm, a work-holder connected with said second shaft, a collar on the latter, and a lifting-lever, to act on said collar, pivoted to the standard, or post, substantially as and for the pur-- with an extended bearing circumferentially and radially, means to move said pin, and a ram connected with the pitman, substantially as and for the purpose set forth.

4. In a press, the combination of a shaft,

an eccentric thereon, the eccentric-strap provided with an opening, a'pitman having an extension projecting into said opening, an annular groove in said extension having an inclined side, a pin engaging said groove having its end of less thickness than the width of the groove, a screw engaging the pin, and a ram connected with the pitman, substantially as and for the purpose described.

5. In a press, the combination of the punchcarrying ram, a shaft, a threaded pitman connecting the shaft and ram, a handle applied to the pitman, whereby it may be turned, and a stop-pin carried by the handle, substantially as and for the purpose described.

6. In a press, the combination of the punchcarrying ram, a shaft, an eccentric thereon, a pitman connected with the eccentric, a pivot on the ram, a threaded connection between the pitman and the pivot, a handle on the pitman, and a stop-pin on the handle adapted to strike the pivot, substantially as and for the purpose shown.

7. The combination of a work-holder composed of upper and lower parts, the upper part being movable, and adapted to clamp the work upon the lower part by its weight, the vertically-movable shaft, to which said upper part is attached, a collar on the shaft, a cam-lever engaging the under side of the collar, and a feed-wheel for revolving the work, mounted upon said shaft, substantially as and for the purpose specified.

8. The combination of the work-holder having a movable upper part, the shaft to which the latter is attached, the feed-wheel upon said shaft, said parts operating by their gravity to hold work, and the cam-lever for raising the shaft, substantially as and for the purpose shown.

9. The combination of the work-holder, composed of two parts which clamp the work between their opposite faces, means for applying power to one of said parts, to rotate the same, and a couplingpiece extending from one part to the other and engaging each, whereby the rotation of one part may be imparted to the other, substantially as and for the purpose set forth.

10. The combination of the two-part workholder, a pivot for one of said parts, means for applying power to the other part to rotate the same, and a key coupling said parts to cause one to rotate the other provided with means to engage the work held between them, substantially as and for the purpose set forth;

11. The combination of the two-part workholder, a pivot for one of said parts, a shaft carrying the other part, and a key projecting from one part into an opening in the other, and provided with a rib to engage the work held between the work-holder parts, substantially as and for the purpose described.

12. In a press, the combination of a ram, a shaft for actuating the same, a worm on said shaft having a portion of its thread uninclined, a wheel engaged by the worm, a vertically-movable shaft carrying said wheel, and a work-holder comprising an upper and lower part, the upper one being attached to said shaft, substantially as and for the purpose specified.

13. In a press, the combination of the punchcarrying ram, a shaft from which said ram receives motion, a rotary disk-holder, means whereby the latter may be revolved step by step by said shaft, to pass new portions of the disk successively into position to be acted on by the punch, and means for adjusting the position of the punch relative to the work, whereby the punch may be placed so that in its movement by the ram, it will not act on the work, and during such movement may be placed so that it will act on the Work, substantially as and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 19th day of May, A. D. 1896.

OBERLIN SMITH.

Witnesses:

JAMES J. REEVES, HUGH L. REEVES.

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