US663887A - Ratchet-drill. - Google Patents

Description

No. 663,887. Patented Dec. la, |900'.

' W. S. HALSEY.

BATCHET DRILL.

l n (Application led Aug. 30, 1900,) (No Model.)

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WITNESSES:

- An internal thread 8, which forms a feed-nut,

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WILLIAM-S. HALSEY, OF PITTSBURG, PENNSYLVANIA'.

RATCH ET-DRILL.

SPECIFICATION forming part of Letters Patent No. 663,887, dated December 18, 1900.

Application filed August 30, 1900. nerial No. 28,510. (No model.)

T0 all whom t may concern/- Be it known that I, WILLIAM S. HALsEv, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a certainnew and useful Improvement in Ratchet.- Drills, of which improvement the following is a specification.

The object of my invention is to improve the construction and perfect the operation of a ratchet-drill of the construction ordinarily employed in machine-Work by the provision of simple, inexpensive, and self-contained means for effecting the self or automatic feed of the drill to the work.

The improvement claimed'is hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a View, partly in elevation and partly in section, of a ratchet-drill, illustrating an application of my invention; and Fig. 2, a transverse section at the line a, of Fig. 1.

My invention is herein exemplified as applied in connection with a ratchet-drill having, as in ordinary practice, a drill-spindle 1, provided with a central socket 2 at one of its ends, in which a drill 3 is suitably secured. The drill-spindle is fitted to rotate in or with, as the case may be, the jaws 4 of a drill-stock or operating-handle 5 and has secured upon it a ratchet-Wheel 6, the teeth of which are engaged by a pawl 7, pivoted to the jaws 4.

is cut centrally in the drill-spindle 1, extending from the end thereof opposite that in which the socket 2 is 'formed for a distance proportionate to the desired range of longitudinal feed to be imparted to the drill, its inner end being, in the instance shown, located near the axial plane of the drill-stock 5.

A feed-screw 9, having a conical center 10 on its outer end to abut against a fixed support, engages the feed-nut 8, its outer end projecting therefrom sufficiently far to enable it to be connected, as by a pin 11, to a feedscrew sleeve 12, which fits truly on the periphery of the drill-spindle and has along bearing thereon, preferably extending to or near the adjacent jaw 4 of the drill-stock. In order to admitofindependenthand-feed, if desired, the feed-screw 9 and feed-screw sleeve 12 may be connected by a pin 13, passing through one of a series of transverse passages 14 in the sleeve and through a passage at right angles thereto in the feed-screw.

A friction-sleeve 15 which is partially split or divided by a longitudinal passage 16 on one side and is formed upon 0r fixed to the jaw 4 on the side of the drill-stock adjacent to the feed-screw, fits freely around the feedscrew sleeve 12 and is provided with an annular recess near its outer end', in which is tted a friction-ring 17, of wood, vulcanite fiber, leather, or other suitable material. A clamping-bolt 18 passes through lugs 19 on each side of the longitudinal passage 16 and serves to draw the sides of said passage toward each other and to thereby effect the operative connection of the friction-sleeve 15 and feed-screw sleeve 12 through the induced compression and frictional contact with said sleeves of the friction-ring 17.

It will be apparent to those skilled in the art that the relative external and internal positions of the feed-nut S and feed-screw 9, respectively, are not essentials of my invention and that they may be reversed, if desired, without departure from the essential features or operative principle thereof-that is to say, the feed-nut may be formed as an internal thread on the sleeve 12 and the feed-screw as an external thread on the drill-spindle 1. The operation ofthe device will be the same in all particulars with such reversal of position as in the specific embodiment of my invention shown in the drawings, and I therefore specify a construction in which it is presented as the mechanical equivalent of that specifically herein described and shown.

In the operation of the drill, theA clampingbolt 18 having been screwed up to induce proper frictional contact of the ring 17 and sleeves 15 and 12, the stock 5 is turned in the direction for forward or working movement of the drill 3, which is imparted thereto through the engagement of the pawl 7 and ratchet 6, all the members of the appliance moving coincidently in this stroke of the drillstock. When the stock has made the full traverse which is admissible under the conditions of the work, it is turned backward in the usual manner preparatory to its succeeding working stroke. In the backward trav- IOO erse of the stock the pawl 7 slips over the teeth of the ratchet-Wheel 6, and no rotative movement is imparted to the drill-spindle l and drill 3. The feed-screw 9 is, however, rotated with the stock through its positive connection with the feed-screw sleeve l2 and the frietional engagement of the sleeves l2 and l5 through the friction-ring 17. The rotation of the feed-screw consequently imparts longitudinal movement to the then non-rotating feed-nut 8, by which the connected drill 3 is automatically fed into the Work during the backward stroke of the drill-stock 5.

My improvement presents the substantial advantages of simplicity of construction, effective operative capacity, and inconsiderable cost, and being Wholly self-contained it may be used Within a limited space Where the extraneous appliances heretofore employed for effecting self feed Would not be practicable. The economy effected .in dispensing with such extraneous feed devices Will be apparent to the skilled mechanic.

I claim as myinvention and desire to secure by Letters Patent- 1. In a ratchet-drill, the combination of a drill-spindle, a drill connected thereto, a drillstock, means for imparting rotative movement from the drill-stock to the drill-spindle, in one direction only of traverse of the drillstock, a feed-nut in the drill-spindle, a feedscrew engaging said nut, a member connected to and movable With the feed-screw and having a frictional surface, a member connected to and movable With the drill-stock and having an adjoining frictional surface, and

means for bringing said frictional surfaces into operative frictional contact.

2. In a ratchet-drill, the combination of a dri1l-spindle,a drill connected thereto, a drillstock, means for imparting rotative movement from the drill-stock to the drill-spindle, in one direction only of traverse of the drillstock, a feed-nut in the drill-spindle, a feedscrew engaging said nut, a sleeve secured to the feed-screw, a friction-ring surrounding said sleeve, and connected with the drillstock, and a clamping device adapted to induce and maintain operative frictional contact between the friction-ring and the feedscrew sleeve.

3. In a ratchet-drill, the combination of a drill-spindle, a drill connected thereto, means for imparting rotative movement from the drill-stock to the drill-spindle, in one direction only of traverse of the drill-stock, a feednut formed centrally in the drill-spindle, a feed-screw engaging said nut and having a center on its outer end, a sleeve fixed to the feed-screw and fitting freely on the drillspindle, a split or divided sleeve xed to the drill-stock and fitting around the feed-screw sleeve, a friction-ring held in a recess in the drill-stock sleeve and fitting the periphery of the feed-screw sleeve, and a clampingscrew'engagingihe divided portion of the drill-stock sleeve and acting to compress the friction-ring against the feed-screw sleeve.

' WILLIAM S. HALSEY.

Witnesses:

J. SNOWDEN BELL, CLARENCE A. WILLIAMS.

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