US506865A

US506865A - hoefer

Info

Publication number: US506865A
Authority: US
Publication date: 1893-10-17
Anticipated expiration: 1910-10-17

Description

3 'sheets-.sheen 1.

(No Model.)

D. C. vSTOVER 8v F. W.. E. A. 8v A. HOEFER.

DRILLING MACHINE.

No. 506,865. Patented 001. 17, 1893.

j) im M11111111111111i (No Model.) l SSheetSfSheet 2.

' D. C. STOVER & F. W., E. A. 8v A. HOEFER.

DRILLING MACHINE. No. 506,865. Patented Oct. 17, 1893.

(No Model.) SSheets-Sheet 3.

' D. C. STOVER 8v I'. W., E. A. 8v A. HOEFER. Y

DRILLING MACHINE.

No. 506,865. Patented 001.. 17, 1893.

- 2 zw fi ,jfgwnmu/hwww@ I i' A I IMIHIIIIM d UNTTED STATES PATENT OFFICE.

DANIEL C. STOVER, FREDERICK W. HOEFER, EMIL A. HOEFER, AND AUGUST HOEFER, OF FREEPORT, ILLINOIS, ASSIGNORS TO THE STOVER NOVELTY WORKS, OF SAME PLACE.

DRlLLlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 506,865, dated October 17, 1893.

Application filed October 12,1892- Serial No. 448,655. (No model.)

To @ZZ whom t may concern: to receive motion through a belt from any Be it known that we, DANIEL C. STOVER, suitable source f power and is provided at its FREDERICK W. HOEEER, EMIL A. HOEFER, other end with a sliding pulley, P, having a and AUGUST HOEFER, citizens of the United key which moves in a groove, g, in the shaft,

States of America, residing at Freeport, in the the pulley being thus adapted to rotate with 55 county of Stephenson and State of Illinois, the shaft, and, at the same time, to move have jointly invented certain new and useful longitudinally upon it as desired. The lon- Improvements inDrilling-Machines, of which gitudinal movement of the pulley, P', upon the following is a specification. the shaft is controlled by means of the dero Our invention relates to improvements in vice illustrated in Figs. l, 2, 3, in which R is 6o drilling-machines of that class in which moan external ring moving longitudinally upon tion is communicated from the driving pula portion of the bearing of the shaft, C, and ley to the drill-chuck through co-acting'fricprovided with a set screw sliding in a groove, tion devices adapted to be Yso adjusted with g', in the bearing, this screw being adapted reference to each other as to vary the speed to prevent rotation of the ring upon the bear- 65 of rotation of the chuck. ing, and also to fix the ring in any desired The invention is fully described and eX- position thereon. The ring, R, is provided plained in this specification and shown in With two arms r, r, parallel with the shaft, O, the accompanying drawings, in whichand having at the end opposite the ring, R,

zo Figure lis a side elevation of a drillingan integrally formed half-ring, or yoke, R', 7o machine embodying our improvements. Fig. lying in an annular groove, g2, in the hub of 2 is a vertical section thereof. Fig. Sis a View the pulley P. The longitudinal movement partly in top plan and partly in horizontal of the ring, R,moves the pulley P', longitudisection illustrating the means for moving the nally upon the shaft, C, Without interfering z 5 adjustable element of the friction devices. in any Way with its rotation. 75 Fig. 4 is an enlarged elevation of the crank Wit-hin the upper end of the hollow standfor raising and lowering the platen of the ard, B, is a vertical shaft, C', journaled in machine and the parts immediately connectsuitable bearing and adapted tobe moved up ed therewith. Fig. 5 is a horizontal section and down through slight limits in the man- 3o illustrating a device for raising and lowering ner hereinafter described, and on the upper So the drill-chuck. Fig. 6 is a front elevation end of this shaft is mounted a horizontal pulof a part of said device, the cap'being reley, P2,whose planeupperface maybe brought moved by a vertical section through the line into frictional contact with the cylindrical 6-6 Fig. 5; and Fig. 7 is a vertical section face of the pulley, P', and when in such conof the base of the machine illustrating the tact may be rotated by the rotation of said 85 means for raising'and lowering the vertical pulley. It is evident that the longitudinal shaft and the intermediate pulley of the frio` movement of the pulley, P', upon its shaft tion device mounted thereon, the plane of must vary its distance from the center of the section being at right angles to that in Fig. 2. pulley, P2, and correspondingly vary the speed 4o In these views, A is a supporting base-*of of the rotation imparted to the pulley, P, by 90 suitable form, and B is a hollow vertical the pulley, P'. standard stepped in a socket in the base. Upon the upper portion of the vertical The standard is provided at and near its upshaft, O2, is mounted apulley, P3, whose workper endwith arms, B' ,132, B3,formed integrally ing edge is in contact with the edge of the with it, the arm B', being provided with a horipulley, P2, already described. The pulley, 9 5 zontal bearing which supports a shaft, C, and P3, is provided with an elongated hub extendthe arms, B2, B3, being provided with vertical ing downward within the bearing formed at bearings lying in line with each other and supthe end of the arm, B2, and this hub and the porting a vertical shaft, O2. The shaft, C, has shaft, O2, within it are connected by means 5o atoneendarigidly mounted pulley,P,adapted of a key permitting vertical sliding move- 100 ment of the shaft with reference to the pulley. Vertical movement of the pulley and its hub is prevented by means of a horizontal pin, as, Fig. 2, lying partly in the bearing and partly in an annular groove in the hub.

On the lower end of the shaft, C2, is mounted a sleeve, S, so connected with the Yshaft that the vertical but not the rotary movement of the shaft is communicated to the sleeve. The sleeve, S, is formed at one side with a vertical line of teeth forming a rack and engaging a pinion, P4, whose rotation raises and lowers the sleeve. The pinion, P4, is mounted on a sleeve, S', Fig. 5, journaled ina suitable horizontal bearing supported by the arm, B3, and on the outer end of this sleeve-is mounted a disk, D, formed with marginal notches, N. A cap, d, covers the disk, D, and is held in placeby a bolt, b, lying within the sleeve, S', and passing through the pinion, P, and the arm, B3, which supports the entire device. A lever, L, passes through the side wall of the cap, d, and extends `outward from it in a radialline, the inner end of the lever being adapted to enter the notches N, N, in the disk, D, and being provided with a transverse pin, p, which prevents its escape from `the cap.` The leve`r,'L, is free to move in and out with reference to the center of the disk, D, and` forms, in use, a combined lever and gravitypawl, its weight beingl sufficient to engage it with the notches of the disk when above :the center thereof, and to disengage it from the disk when below the center. The lever thus forms a very convenient means for imparting step by step rotation to the disk, D, sleeve, S', and pinion, P4, and thereby raising and lowering the sleeve, S, which carries the drillchuck of the machine.

* The meansV above referred to, for raising and lowering the pulley, P2, are fully illus-` trated in Figs. 1, 2, and 7, in which Csis a vertical rod bearing at its upper end a socket, s,

which receives thelower end of the shaft, C',

of the pulley, P2, the rod, C3, being supported by a cam, K, formed with a groove, 7e, in which the lower end of the rod rests. The cam, K, is mounted on a horizontalshaft, C, journaled in a horizontal bearing, B4, lying in thebase of the machine and susceptible of vertical adjustment therein by means of bolts, b', b2, Figs. l and 7. On the outer end of theshaft, C4, is rigidly fastened a transverse step, E,adapted to be operated by the foot in such a way as to swing the cam, K, through a slight angular limit of motion. When the cam is in the position shown in Fig. 2, the pulley, P2, is raised and is in frictional contact with the pulley, P'; but when the cam is at its opposite limit of motion, the pulley, P2, is dropped down out of contact with the pulley, P. Hence, when the cam is in one position, the rotation of the driving pulley, P, is transmitted through the pulleys, P', P2, to the pulley, P3, and when the cam is in its opposite position, the pulleys, P,

P', may rotate without transmitting any n10- tion to the pulley, P3, and the drill-chuck.

Beneath the shaft, C2, is a work-supporting platen, F, provided with asplit-ring, F', encircling the standard and slidin g up and down upon it, the ring, F', being provided with a screw-threaded tightening bolt, f, having a crank or handle for turning it to tighten the ring upon the standard and thus tosecure the platen in any desired position. A chain, G, having one of its ends secured to the ring, F', passes upward over asprocket-wheel, H, journaled in an attachment to the standard, and thence downward within the standard,its free end being provided with a tubular weight, W, which encircles the rod, C3, and slides freely up and down within the standard, this weight being adapted to counterbalanee the platen andfaeilitate its adj ustment;u-ponithestandard. The sprocket-wheel, H, is mounted upon the horizontal shaft, H', provided ywith a'crank for its rotation and has on one of its faces a series of inclined ratchet teeth h, adapted to engage a corresponding seriesof teetlrformed upon the ear or projection which supports one end of the shaft, H', and presses iny one direction against the sprocket-wheel, H, in such a way as to tend to bring the teeth, h, of

the sprocket-wheel into engagement with the teeth, 71.', upon the stationarysupport..4 When these teeth are in engagement, the ratchet wheel may be 4turned ina direction adapted i to raise the platen but is secured by the teeth against reverse rotation. When the platen has upon it a heavy load of work sufficient to over-balance the weight, W, it may be raised by means of the crank and sprocket-wheel, but ateach step is locked against any tendency to drop down. l When it is desired to lower it, however, a slight longitudinal movement of the shaft, H', and sprocket-wheel, H, against the force of the spring, is sufficient to withdraw teeth, It, from engagement with the teeth, 7L', and as soon as this engagement is broken the platen may be lowered.

As shown in the drawings, the pulleys, P', P3, are faced with leather or other suitable material adapted to increase their friction when in contact with the intermediate pulley, P2, andwe havefound the use of such a facing advantageous in practice. Thisfeature of construction, however, constitutesA no part of our invention. Y The shaft, C', which carries the pulley, P2, may be supported in any `suitable bearings, but we prefer such a lconstruction as will permit lateral adjustment of the shaft inorder to preserve the contact of the pulleys, P2,P3. Fig. 2 shows a device'for thispurpose, M being a bearing plate secured to the top ofthe standard by means `of bolts, m, m, passing through longitudinal slots of slight extent formed in the bearing plate. Anadjusting bolt, m', passes horizontally through one end of the bearing plate and abuts against the corresponding bolt, m, the `rotation ofthe bolt,

IOO

IIO

m', being evidently adapted to draw the plate, M, in either direction, and the bolts, m, fm, being adapted to secure the plate in any desired position.

In order to hold the sleeve, S, at any desired elevation, We have found it desirable to provide it with a friction bolt, m2, Fig. 2, passing invention, what we claim as new, and desire to secure by Letters Patent, is

1. The combination with the standard, the shaft, C2, journaled in suitable bearings thereon, and means substantially as shown and described, for rotating said shaft, of the chuck-supporting sleeve, S, sliding on the shaft and rotating therewith, the pinion, P4, engaging teeth upon the sleeve, the notched disk, D, rigidly connected with the pinion, and the gravity lever, L, adapted to engage the notches in the disk and to serve as means for rotating the disk and pinion and raising and lowering the sleeve; substantially as shown and described.

2. The combination with the shaft, O2, sliding sleeve, S, and pinion, P4, of the notched disk, D, rigidly connected with the pinion, the rotating case, d, inclosing the disk, and the gravity lever, L, passing through and projecting from the case and provided with a pin, lo, preventing its escape from the case, the inner end of the lever being adapted to engage the notches in the disk; substantially as shown and described.

8. The combination with the hollow standard, B, the drill-carrying shaft, C2, supported therein and means for rotating said shaft, of the platen, F, provided with the ring, F', sliding upon the standard and having means for clamping it thereon, the sprocket-wheel, H, supported by the standard, the chain, G, fastened at one end to the platen and passing over the sprocket-wheel, and the Weight, W, lying withing the standard and fastened to the end of the chain, said weight being adapted to move up and down within the standard and balance the weight of the platen; substantially as shown and described.

4. The combination With the hollow standard, B, the platen, F, means for securing it at any given point upon the standard, of the sprocket-wheel, H, supported by the standard, the chain, G, passing over and engaging the sprocket wheel and fastened at one end to the platen, the weight, W, fastened to the opposite end of the chain to balance the weight of the platen, and a suitable crank attached to the sprocket-wheel and adapted to rotate it in'either direction and thereby to raise and lower the platen; substantially as shown and described.

5. The combination with the standard and the drill-carrying and drill-operating mechanism supported thereby, of the vertically adjustable platen, F, the weight W, the chain, G, having its ends fastened to said weight and platen, respectively, the sprocket-wheel, H, mounted on the standard and supporting the chain, G, co-acting teeth formed on the sprocket-Wheel and standard and adapted to lock the sprocket-wheel against rotation, and a spring adapted to maintain the engagement of said teeth and to yield to pressure and permit the disengagement thereof and the free rotation of the sprocket-wheel; substantially as shown and described.

6. The combination with the standard, B, the drill-carrying shaft and means for rotating the same, of the platen F, the sprocketwheel, I-I, provided with ratchet teeth, h, on its face, the weight, W, the chain G, passing over the sprocket-wheel and having its ends fastened to the platen and weight respectively, the crank for rotating the sprocketwheel and the spring, h2, adapted to press the teeth, h, of the sprocket-wheel into engagement with corresponding teeth upon thestandard and lock the sprocket-wheel against rotation substantially as shown and described.

7. The combination with the hollow standard, the driving shaft, G, and adjustable pul-Y ley, P', of the shaft, C', the pulley, P2, mounted thereon, the cam, K, supporting the shaft, G', the shaft, G4, supporting the cam, the bearing B4, supporting the shaft, C4, and means substantially as shown and described for rocking the shaft, C4, and the cam, K, and raising and lowering the shaft, G', substantially as. shown and described.

8. The combination with the standard, the shaft, C, the adjustable pulley, P', the shaft, G', and the pulley, P2, mounted thereon, of the vertically adjustable horizontal box, B4, the shaft, C4, journaled therein and provided with means for rocking, and the cam, K, mounted on the shaft, C4, andv supporting the weight of the shaft, G', the rocking of the shaft, G4, and cam, K, being adapted to raise and lower the pulley.

DANIEL C. STOVER. FREDERICK W. HOEFER. EMIL A. HOEFER. AUGUST HOEFER.

Witnesses:

H. H. ANTRIM, W, C. OsTEN.

IOO