US395592A - sghwaezlee - Google Patents

Description

(No Model.) 3 sheets-sheet 1".

M. SOHWARZLER. FEED ATTACHMENT EOE DRILLING MACHINES.

No. 395,592. Patented Jan. 1,1889.

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, M. SOHWARZLER.

FEED ATTACHMENT FOR DRILLING MACHINES. No. 395,592. Patented Jan. 1, 1889 N. PETERS, Phcla-Ldhographcr. Washinglnn, ll 6.

3 SheetYs Sheet 3.

(No Model.)

M. SGHWARZLER.

FEED ATTACHMENT FOR DRILLING MACHINES.

No. 395,592. Patented Jan. 1,1889.

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MARTIN SCHlVARZLER, OF NEW YORK, N. Y.

FEED ATTACHMENT FOR DRILLING ll/IACHINES.

SPECIFICATION forming part of Letters Patent No. 395,592, dated January 1, 1889.

Application filed July 3, 1888.

To aZZ whom it may concern.-

Be it known that I, MARTIN SoHwiiRzLER, of the city, county, and State of New York, hav e invented certain new and useful Improvements in Feed Attacluncnts for Drilling-llachines; and I do hereby declare that th 0 following is a full and exact description thereof, ref erence being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification, in which Figure 1 is a front elevation of my improved It consists in the combination of devices,

as hereinafter fully described, and set forth in the claims, whereby the clutch by which the ratchet-wheel and the shaft in the drill-feeding mechanism are coupled together is automatically moved and released at the moment the feed has progressed far enough, so that the feed is thereby arrested and the drill left free to be carried upward by means of its retracting spring or weight, and also whereby simultanemisly with the automatic retraction of the drill a catch controlling the movement of the carriage upon which the work is mounted is momentarily released from one of a series of notches in a gage-bar on the carriage, thereby allowin the carriage to move automatically forward under the influence of a weight or spring until arrested by the engagement of the catch with the next notch, all as hereinafter specified.

In the accompanying drawings, 1. 1 are the pillars or standards of the machine, to which are fitted the lateral brackets 2 2*. In the upper ends of the two brackets are journaled the two parallel shafts and 1: (see Fig. 2) for the feed mechanism of the drill, and the brackets are connected by a top plate, 5, and.

Serial No. 278,944. (No model.)

by two parallel bars, 6 and 7, beneath it,which furnish suitable bearings for the vertical drillspindle 8.

The feed mechanism for the drill is con structed substantially as describedin my patent,No. 343,73at, of June 15, 1886. It consists of a large ratchet-wheel, 9, mounted loosely upon the shaft This ratchet-wheel is connected. and disconnected from said shaft by means of a clutch, 10. (See Fig. 1.) This clutch 10 consists of a disk formed with a radial arm, 12, from which projects a lateral pin, 13, which is adapted to engage any of an annular series of holes in the side of the ratchet-wheel, while a second parallel. pin, 11, projecting from the disk, is adapted to engage simultaneously any of an annular series of holes in the outer flange, 16, of the shaft 3. Thus by moving the clutch inwardly its two pins, 11 and 13, engage the shaft and ratchetwheel and connect them; but by moving it outwardly they are disconnected and the ratchet-wheel moves freely.

The ratchet-wheel 9 is made to revolve with an intermittent movement by means of a pawl, 18, pivoted to the upper end of a vibrating lever, 19, (see Fig. 2,) whose lower end terminates in a bent arm, 20, which is brought into contact with an eccentric, 52], upon the driving-shaft 22 of the machine.

The drill-spindle 8 is journaled to rotate freely in the two transverse bars 6 and 7, and is driven by means of a belt, 50, car *ied over a pulley, 23, feathered on said spindle, as shown in Fig. 2, and extending thence to the driving-pulley on the main shaft. The drill spindle is coupled at its upper end by a suitable coupling device, MC, of the customary form, which will permit a free rotation of the spindle to a verti call y-reci procatin g rack-bar, 25, mounted in the top plate, 5, A pinion, 26, upon the shaft +t meshes with the rack-bar, and a large spur-wheel, 2'', (see Fig. 1,) upo said. shaft 4, meshing with a small pinion, 28, upon the shaft 3, gears them together, so that the rotation of the shaft 3 servesto vertically reciprocate the drill-spindle.

The rack-bar 25 and attached drill-spindle 8 are automatically carried up to their highest position when the shaft 3 is free and disengaged from the ratchet-wheel 9 bymeans of a weight, 29, suspended from a cord, 30, (see Fig. 2,) carried over suitable pulleys, 31 31, and attached to a parallel vertically-reciprocating rack-bar, 32, mounted in a bracket, 33, (projecting from the top plate, 5,) and which meshes with a pinion, 34, upon the shaft 3. The movements of this parallel rack-bar 32 are necessarily synchronous with the movements of the rack-bar 25, carrying the drillspindle, but owing to the difference in gear are more rapid.

To obtain an automatic control of. the movements of the clutch 10, the clutch is engaged by a fork at the upper end of the vertical arm of a bell-crank lever, 35, pivoted to an ottset, 36, projecting from the frame of the machine beneath the clutch, (see Fig. 1,) so that the shorter horizontal arm, 37, of the lever projects toward a vertical tripping-rod, 3S, titted in the lower end of the rack-bar 32. The shorter end of a horizontal lever, 39, jointed to the front edge of the bracket 2, is pivoted to the end of said arm 37, while its longer end projects into proximity to the tripping-rod 38 in position to be struck by either of two adj ustable fingers, 4:0 and 41, projecting from collars fitted upon the rod 38, and secured thereon when properly adjusted by means of setscrews 42 4:2. A flat spring, 60, operates to throw the clutch automatically into engagement with the ratchet-wheel and the flange on the shaft to couple them.

A spiral spring, i3, secured at one end to the rod 38 and at the other to the bracket 33 on the frame of the machine, (see Fig. 1,) serves to quicken the upward start of the tripping-rod when it is set free, and also operates to re-enforce the action of the spring (50 in producing an engagement of the clutch. A spring-actuated catch, 4st, engaging a pin on the side of the long end of the lever 2:9, serves to hold the lever and keep the clutch back after the lever has been depressed by the upper finger, 4:0, and until it is moved back by the lower finger, ll.

The tube or other piece of work to be drilled is mounted upon a suitable carriage, 4.6, sliding horizontally in ways formed upon the bed-plate 47 of the machine immediately under the drill-bar. This carriage is adjusted laterallyin its ways by means of set-screws 4:8 48. It is automatically carried in one direction by means of a weight, 49, attached by a cord to one end thereof, and is arrested in its automatic movement by means of a lateral catch-bar, 51, Figs. 2 and 8, fitted to slide horizontally at a right angle to the line of movement of the carriage into and out of engagement with a series of notches formed in the side of a detachable gage-bar, 45, secured on the proximate top side edge of the carriage. The front end of the catch 51 is beveled from both sides to a sharp angle, (see Fig. 3,) and the engagement of this angle with the several notches in the gage-bar 45 is enforced by means of a spring, 52, inserted back of the catch, as shown in Fig. 3.

The gage-bar45 is preferably rectangular in cross-section, and is adapted for ready detachment from the carriage and admits of reversal, so that any one of its four sides may be presented to the catch, each side having a dilierent system of notches formed thereon, (see Fl 3,) severally distinguished by the different intervals between the notches.

The catch 51 is automatically withdrawn from its notch in the gage-bar at the moment the drill is withdrawn from. the work, and instantly released to engage the next notch by means of a lever, 53, pivoted to vibrate horizontally in the plane of the catch-bar. (See Fig. 3.) This lever 53 jointed at one end by a pivotal connection to the catch-bar, and its opposite end is brought into contact with a latch, 54-, (see Fig. 2,) upon the lower shorter arm, adjustable in length, of a lever, 55, which is pivoted to vibrate in avertical plane in line with the vertically-reciprocating tripping-rod 38, and whose upper longer arm is bent to curve forward into ahorizontal plane, as shown in Fig. 2, so as to overlap a finger, 56, ad justably titted by means of a collar and set-screw to the lower end of said rod 38. A friction-roller, 5.), is fitted upon the end of this longer arm of the lever 55, so as to ease the frictional contact of the finger 5G with the lever and allow the latter to move freely over the former.

The latch 54- is so adjusted as that when the lower arm of the vertical lever is swung backward the latch will swing up and slide back freely over the end of the horizontal lever 53, and then drop into position behind it to engage it; but when the arm swings forward the latch on gages said lever, and thereby causcs it to move so as to produce a retraction of the catch-bar from the carriage, and in doin so to slip over and pass free from the lever.

A guide and support are provided for the drill to be used in starting it upon a curved surface, such as the periphery of a tube. It consists of a D0i'fOlflt0tl head, 57, (see positive and dotted lines, Fig. 2,) adapted to the size of the drill and titted upon. the end of an arm, 58, pivoted to the frame to swing from an upright into a suitable horizontal position upon the piece of work immediately under the drill, so that the drill may pass through it. (See dotted lines, Fig. 2.) \Vhen not in use, it is swung up out of the way, as shown in positive lines in Fig. 2.

In the use of my invention, the work being properly secured upon the carriage under the drill, the carriage 40 is moved back so as to bring the drill in position for the first hole of the series, and in so moving it back the weight 49 is lifted. \Vhen thusmoved back, the carriage is held in opposition to the in fiuence of the weight i9 by the engagement of the springactuated lateral catch 51 with the first of the series of lateral notches in the gage-bar 45, secured to the carriage. The drill, being new actuated in the customary manner by means reciprocating rod mounted parallel with the drill-spindle to move/in synehronism with it, the gearing between the rod and spindle, an adjustable finger projecting from the rod, and means for disengaging the catch from the carriage by the movement of the finger, consistin of the interposed 1, ivote(llevcrs53 and 55, all substantially in the manner and for the purpose herein set forth.

0. The combinatimi, in a (lrillinp;-n1achine, of the carriage M the lateral swing-actuated catch 51, and The detachable, reversible,

notched gage-bar secured upon the carriage to be engaged by the catch, substantially in the manner and for the purpose herein set I 5 forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

MARTIN SGHXVARZLER.

'itnesses:

A. N, JESBERA, E. M. WATSON.

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