US499312A - Alonzo g - Google Patents

Description

ooooooo v A. G. TURNER.

' DRILL.

N0.499,312. 'v PatentedJunelii 1893.

NITED STATES FFi'ciE.

PATENT ALONZO G. TURNER, OF DURANGO, COLORADO, ASSIGNOR OF TWO-THIRDS TO FRANK A.- KIMBALL AND. ALEXANDER LEVY.

D R L.

SPECIFICATION forming part of Letters Patent No. 499,312,dated June 13, 1893. Application filed January 9, 1893- Serial No. 457,773- (No model.)

To all whom it may concern: 7

3e it known that I, ALoNzo G. TURNER, a citlzen of the United States, residing at Durango, inthe county of La Plata and State of Colorado, have invented certain new and use ful Improvements in Drills; and I do hereby declare the following to be'a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to drills, and particularly to that class of drills employed in rock drilling or in the drilling of wells; and my invention consists in the novel construction and arrangement of the parts, as is hereinafter deeration, and the drill unscrewed. This object is attained in the mechanism herein described and illustrated in the drawings which accompany and form a part of this application, in which the same reference letters indicate the same or corresponding parts, and in which- Figure '1 is a perspective view of the upper end or head of the drill, and shows the looking bolt which looks the drill to the drill-rod. Fig. 2 is a perspective view of the lower end of the drill-rod, showing the ratchet teeth with which the locking bolt engages. Fig. 3 is a vertical section of the drill and drillrod joined together, the plane of section passing through the axis of the drill and drill-rod and through thecenter of the chamber within which the locking bolt works. Fig. at is a horizontal section of the drill and drill-rod, the plane of section being perpendicular to the plane of section of Fig. 3, and likewise passing through the center of the chamber within which the locking. bolt works. 7 Fig. 5 is a detail perspective view 'of the locking bolt. Fig. 6 is an elevatiohot' a catch-pin to be hereinafter mentioned.

In the drawings, A, is the drill, and the I .Within the drill A is a longitudinal chamber E, within which chamber slides a locking bolt, F. This locking bolt consists of two parts, viz., the head, f, andthe stem, f. The head fis provided with ratchet teeth corresponding to the teeth of the drill-rod B. The chamber E corresponds in shape with the bolt F,

and'consists of a longitudinal bore or passage closely embracing the stem f of the bolt F, thus serving'to guide this bolt as it slides back and forth. The upper end of this chamber E is enlarged to receive the head f of the bolt F; The chamber E is most readily formed in'the drill by boring in its end several parallel and closely adjacent holes, the center holebeing carried down much deeper than, I the others to form the passage which receives .the stem of the bolt F, and after these holes are bored cutting out the webs of metal lying between them.

A spring, G, at the bottom of the chamber E, tends to push outward the bolt F, this movement of the pin being limited by a screw H the point of which projects into the chamber E and works in a slot hin the head of the bolt.

When pushed outward by the spring G the teeth of the bolt F engage with the teeth of the drill rod B, and lock the same, so that it is impossible to turn backward the drill-rod to unscrew it from the drill. By drawing inward the bolt F its teeth are disengaged from the teeth D of the drill-rod, which may then be unscrewed. For the purpose of drawing inward the bolt F there is provided a slot I in the side of the drill at a point directly over the stem f, and in this stem f is a correspondin g recess 2'. When it is desired to draw inward the bolt F a pointed tool is inserted through the slot I into this depression 2', so that the point of the tool catches in this depression, and the bolt F may then be pulled back. To hold the bolt disengaged from the teeth of the drill-rod B there is provided a catch-pin, K, working in a radial passage L opening into, but placed slightly to one side of, the chamber E. The position of this pin K and of the passage L within which it works, is clearly shown in Figs. 3 and 4:- In the side of the bolt F is a recess M, and the shank of the catch-pin K is cut away at the neck so as to form a shoulder, N, adapted to fit into this recess M and lock the bolt F. This recess M is so situated on the bolt F that when the bolt is drawn inward far enough so as to be free from the teeth D of the drill-rod B this recess M will be opposite the pin K, and a spring 0 then pushes this pin K upward so that the shoulderN fits into the recess M and holds the bolt F locked.

The head of the pin K should preferably project slightly above the surface of the drill when it is locking the bolt F in the manner just described, so that should it ever happen, through oversight, that the drill and drill-rod, after having been screwed together, should be dropped into the well without first releasing the bolt F and permitting its teeth to engage with the teeth D of the drill-rod B, the head of the pin K will be pressed inward by the sides of the well as the drill enters the well, thus releasing the bolt F, which will then be forced outward by its spring G into engagement with the teeth D of the drill-rod B.

Radial holes, 0, O, are provided in the drill A, opening into the chamber E at suitable points, so that through these holes any sand which may collect in the chamber E may be removed.

The operation of this device is as follows:- The locking bolt F being in the position shown in Fig. 1, when the drill and drill-rod are screwed together the teeth of the bolt F will engage with the teeth of the drill-rod in such a manner as to make it impossible to unscrew the drill from the drill-rod, but olfering no resistance to the screwing together of the drill and drill-rod, the bolt F being de pressed as the teeth D pass over it. The drill and drill-rod can thus be screwed together until their end faces are in contact, so that these faces, and not the threads of the screw may bear all the force of the blows delivered by the drill, and the teeth of the drill-rod B engaging with the teeth of the bolt F make it impossible for any turning of the drill in the well to cause the drill to unscrew from the drill-rod. When it is desired to unscrew the drill from the drillrod, a pointed instrument is introduced through the slot I into the recess t' of the bolt F, and the bolt is then drawn backward until the recess M is opposite the pin K, when the spring 0 forces the pin K upward until the shoulder N enters the recess M and holds the bolt locked. The drill may now be unscrwed from the drillrod. hen it is desired to release the locking bolt F so that when thedrill and drill-rod are again screwed togeth er theymay be locked, the pin K is pressed inward, releasing the bolt F, which is then pushed outward by its spring G. It is obvious that while this locking device is especially adapted to securing drilling tools together, it is also adapted to the scouring together of any rods or shafting where it is important that the parts shall not become separated while in operation.

Having thus completely described my invention, what I claim, and desire to secure by Letters Patent, is

l. The combination with a drill and drill rod screwing together end to end, the said drill rod being provided with a concentric series of ratchet teeth on its end, of a spring actuated locking bolt working in a chamber within said drill adapted to engage with the said concentric series of ratchet teeth, means whereby the locking bolt may be withdrawn from the ratchet teeth,and a spring actuated catch pin for locking the bolt in its disengaged position, substantially as described.

2. The combination with a drill and drill rod screwing together end to end, the said drill rod being provided with a concentric series of ratchet teeth on its end, of a spring actuated locking bolt working in a chamber within said drill adapted to engage with the said concentric series of ratchet teeth, means whereby the locking bolt may be withdrawn from-the ratchet teeth, and a spring actuated locking pin for locking the locking bolt in its disengaged position, which normally rests below the surface of the drill, and only projects above the surface of the same when holding the locking bolt withdrawn, substantially as described.

3. The combination, with a drill and drillrod screwing together end to end, and ratchet teeth in the end of the drill rod arranged in a ring concentric with the drill-rod, of a springactuated locking bolt working in a chamber within the drill, its end projecting from the 5 end of the drill and provided with ratchet teeth adapted to engage with the ratchet teeth of the drill-rod, means for drawing inward the In testimony whereof I affix my signature in presence of two witnesses.

ALONZO e. TURNER.

Witnesses:

MERRILL N. BLAKSLEE, WILLIAM A. MARSH.

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