USRE10503E - Islands - Google Patents

Description

BEST AVAILABLE COPY l UNITED STATES PATENT OFFICE.

WILLIAM BREDE, or HONOLULU, HAWAIIAN ISLANDS.

RATCHET-DRILL.

SPECIPICATIQIT forming part of Reisaued Letters Pa Original Nov 299,280, dated January 22, 1884. Application for reissue filed June 20, W84.

T or whmn it may concern:

Be it known that I, WILLIAM BREDE, of Honolulu, Oahu, Hawaiian Islands, have in vented a new and Improved Ratchet-Drill, of

which the following is a full, clear, and exact description.

In my improved ratchet-drill a continuous rotary motion of the drill can be obtained by a forward-and-backward movement of the lever of the ratchet and the drill fed automatically at the same time, whereby drilling can be done quickly and readily.

e invention consists in acombination of E is a bevel-pinion loose on thespindlc, and having a ratchet-wheel, a, on its hub, and on the spindle between the ratcln- -twl1eelsis hung the operating-lever B, provided with pawls I) I), engaging ratchet-wheels a a, the teeth of which are in reverse.

F is a bevel-pinion, fitted loosely, as shown in Fig. 2 of the drawings, in the frame A, so as to engage the pinions'D E. The upper side of pinion E is notched or toothed to form a cam, E',,and on frame A is a slide, II, hav- 6o ing its lower end engaging the cam of the pinion, while its upper end is made with an in clined slot, 8, engaging a pin, 1, projecting from collar M.

I is a canrsleeve loose on frame A, sup 6 porting'the slide H by a pin, a, projecting from the slide over the sleeve I, so that by turning the sleeve the slide II will be raised and lowered, and its len th of movement by b n the cam thus regulated. A spring, e, 111 a Lil bevel-gearlng and ratchet mechanism for 0p: I 5 crating the drill and effecting the feed, as;

hereinafter described and claimed.

Reference is to be had to the accompanying drawings firming part-of this specification, in which similar letters of reference indicate cor- 20 responding parts in all the figures.

Figure l is a side elevation of my improved brace. Fig. 2 is a longitudinal section of the groove around the frame A, bears on a pin, same, and Fig. 3 is a cross-section online at x u, projecting from the slide, for the purpose of Fig.1. Fig. 4 is a detail sectional view of keeping the slide down. 2 showing the position of the slide and a sec- In the operation of the drill, lever B being tional view of the cam. moved in one direction, one pawl, b, acting A is the'frame, formed with an upper bearon the ratohet-wheel a, rotates pinion E, and ing, l, and lower bearing, Z, connected by a the motion is transmitted through pinions F side arm. I D to spindle O." The lever, on its return 0 C is the spindle extending through the movement, acts by pawl b on the ratchet a,

lower bearing, Z, and into the upper bearing, Z. thereby further rotating pinion D, and keep 3O J is a screw-stem, fitted loosely in the-uping up the movement of spindle C in the same per bearing, Z, and extending at its'lower end direction as before.

into the spindle O, which is formed hollow to In the movement of pinion E its cam-hub E causes the rise of slide H more or less continuously, and a greater orless distanee,accord- 5 ing to adjustment of sleeve I, thereby moving collar M, and causing movement of nut L, so that the screw J is forced up at each rise of the slide. The return movement of the collar M is caused by spring e.- I

The upper end of screw J is squared to receive a concave cap, K, for holding the drill, and the cap is formed with points toprevent w is athninb-piece for depressing thepawl, its revolving while drilling. v

" ow backward movement of the nut. Having thus described my invention, what I xed on spindle 0, above bearing l, is a 'claim as new, and desire to secure by Letters l-pinion, D, and a ratchet-wheel,a', that Patent, is- I on'the hub of the p'inioh. 1. In ratchet-drills, the combination of camed fromturning by a feather 10, on the frame A, whilethe feather w enters a slot, 10-, in the screw-stein J. r V

I n the upper end of the frame A is a loose ar, M, beneath a nut, L, that is formed ratchet=teeth on its under side.

' is a pawl fitted ina recess: in'collar M,

0 forced upward by a spring into engage L.

pinion E, slide- II, enllzu' AI. nut L, nml screw The foregoing; specification of my in1provu- .I, substantially as shown and described. menl; in ratchet drill-brace signed by me this I11 I'2Lt01l8t-t1lill5, the cam-sleeve I, 00111- 19th day of May, 1884. hinetl with slide H, canrpinion E, and collar 5 M, snbstantiallyas and for the purpose speci- \V. ljllEDl.

fled.

3. ln rntehebtlrills, the spring 0, combined \Vitnesses: with feed-slide II, having a pin thereon, and (VlIAs. BENT, (zllll-llilliOll E, as and for the purpose sp0ci (I. C. COLEMAN.

IO lied.

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