US640964A - Appliance for lifting and turning drills for rock-boring or other purposes. - Google Patents

Description

No. 640,964.- Patented Jan 9, I900.

4 c.v SIMMONS.

APPLIANGEFOB LIFTING AND TURNING DRILLS FOB BOOK BORING OR OTHER PURPOSES.

(Application filed July 21, 1899) (No Model.) 2 Sheets-Sheet I.

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No; 640,964. Patented Ian. 9, I900. C. SIMMONS.

APPLIANCE FOR LIFTING AND TURNING DRILLS FOR ROCK BORING OR OTHER PURPOSES.

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ciiARLEs SIMMONS, on KUNANALLING, WESTERN AUSTRALIA.

APPLIANCE FOR LIFTING AND TURNING DRiLLS FOR ROCK-BORING OR OTHER PURPOSES.

$PECIFIOATION forming part of Letters Patent No. 640,964, dated January 9, 1900.

Application filed July 21, 1899.

To all whom it may concern:

Beit known that I, CHARLES SIMMONS, mining and civil engineer, a subject of the Queen of Great Britain,residing at Kunanalling, near Coolgardie, in the Colony of WVestern Australia, have invented certain new and useful Improvements in Appliances for Lifting and Turning Drills for Rock-Boring or other Purposes; 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.

This invention consists in improvements relating to appliances forlifting and turning drills for rock-boring and like purposes.

In order that the invention may easily be understood, I will refer to the accompanying drawings, in Which Figure l is a sectional elevation. Fig. 2 is a view in elevation. Fig. 3 is a plan, Fig. 4 being an elevation of the piston, showing the action and arrangement of the pawls and catches. Figs. 5 and 6 are detail views, respectively, of the pawls for the spiral and vertical slots that are formed in the wall of the cylinder.

In this invention the body of the appliance consists of a cylinder a, of cast-iron, steel, or other'metal, mounted on legs or on a frame or stand, as b, on which the cylinder is adapted to swivel, on which it can be clamped or secured at any fixed position by the screw-handle 0. Within the cylinder is a cup-shaped piston d, the lip 0r rim 6 of which is serrated or toothed around its periphery or face, as at f. Annular grooves galso are formed in the external face or periphery of the piston d and on each side of the teeth f. At or about midway in the bottom of the piston is an aperture h for the boring bar or drillql to suitably work in, and around which aperture are situated at intervals the lugs j, set radially to the center of the piston 61 and extending upward from the inner face 7o of the bottom of the piston. In those lugs j are pivoted gripper-arms Z, which at their outer ends m are pressed upon by a coiled cone-shaped spring n, which also comes into contact at its upper and smaller end 0 with the under side of a flange-socket p, screwed into the even or upper end g of said cylinder a, said socket being Serial No. 724,729, (No model.)

adjustable and capable by that means of regtifriction-rollers a, which bear against the outerfaceo of the piston-bottom. The cranklevers s are telescopic. or extensible and, being fitted with set-screw w, can be clamped at any required height to the slotted slides w. After the boring tool or drill 2' has been struck by a hammer the block or pad t of the cranked lever s is struck, so as to depress it. This causes the crank-lever to tilt on its pivot, as at 'u, and apply an upward pressure to the piston 61, which is thus pushed up in the cylinder a. The coiled spring n is by this action compressed, and the gripper-armsl close forcibly at their face y upon the boring-tool?) and hold it, and the same is thereby accordingly lifted. In the act of lifting the piston cl and drill i are caused to turn through part of a circle by the following means:

Formed in the wall of the cylinder is aspiral or curved slot at and also a vertical slot a In these slots are placed riders or pawlsa and a respectively, from the body of each of which projects a movable catch 12 which is shaped at its inner extremity so as to engage with the teeth f, formed, as aforesaid, in the periphery of the piston cl. On the outer side of each pawl and attached to it is a flat spring 0 held in place by a stud c and engaging with the catch 1) aforesaid, which is grooved to receive it. Small lugs 0 projecting from the pawls a, work in the annular grooves g, formed, as aforesaid, in the piston d. 0011- sequently when the piston is moved up in the cylinder at the pawls a travel upward with it in the slots of and a in the cylinder in which they are placed.

The piston in rising in the cylinder under the influence of the blow received on the block or pad 2. of the cranked levers shas also a rotating motion in conformity to the pitch or throw of the spiral slot a This rotary motion results from the engagement of the catch of the pawl a with the teeth of the piston at the same time'the pawl a in the vertical slot a of the cylinder is raised by means of the lugs working in the annular grooves g, While the catch 19 of pawl 01, is pressed outward by the moving teeth f of the piston, which thereby pass under the catch. The pawl a in the vertical slot a prevents rotation of the piston when descending, during which movement the catch of the pawl in the spiral slot slips over certain of the teeth of' the piston; As the coiled spring 12' rebounds in the descent of the piston the boring tool or drill is carried back with it, there still being suflicient initial force communicated to the gripper-arms to insure the boring-tool being held or suspended even when boring upward or in any other direction.

What I claim as my invention, and desire to secure by Letters Patent, is

l. A drill lifting and turning device comprising a stationary cylinder, a piston vertically movable therein, spring-pressed gripping devices carried by said piston within the cylinder, and a lever pivotally connected to the cylinder and having its end bearing against the bottom of the piston and moving said piston upwardly in opposition to the spring, substantially as described.

2. In combination, the cylinder having straight and inclined grooves or slots, the piston vertically movable therein and having annularly-arranged teeth, blocks traveling in said grooves having a spline connection with the piston and having pawls engaging said teeth, gripper-arms carried by said piston, a spring within the piston bearing on said arms, and a lever pivoted to the cylinder for raising said piston, substantially as described.

3. In combination, the cylinder, a piston vertically movable therein, spring-pressed gripping devices carried by said piston within the cylinder, a lever pivotally connected to the cylinder and having its end bearing against the bottom of the piston and moving said piston upwardly in opposition to the spring, means for causing said piston to ro tate in said cylinder as it reciprocates there in and an extensible handle for the lever, substantially as described.

4. In combination, the cylinder, the piston therein, means for effecting the automatic rotation of said piston as it rises and falls, said piston having a central drill-opening, lugs around said drill-opening, gripping levers or arms pivoted to said lugs, a spring bearing against the outer ends of said arms for causing them to grip and also press the piston in one direction and means for moving said piston upward in said cylinder against the tension of the spring, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

CHARLES SIMMONS.

Witnesses:

H. ANSELL HACK, J As. G. FINLAY.

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