US538323A - Bit-brace and hand-drill - Google Patents

Description

(No Model.)

' uD. CUTTS.

BIT BRAGD AND HAND DRILL. No. 538.323.- Patented ApryBO. 1895..

UNiTED STATES PATENT Fries.

CHARLES D. CUTTS, OF FORT FAIRFIELD, MAINE.

BIT-BRAC AND VHAND-DRILL.

SPECIFICATION forming part of Letters Patent No. 538,323, dated April 30, 1895.

Application tiled February 1895. Serial No. 539,525. (No model.)

To all whom it may concern:

Be it known that I, CHARLES D. CUTTs, a citizen of the United States, residing at Fort Fairfield, in the county of Aroostook and State of Maine, have invented anew and Improved Bit-Brace and Hand-Drill Combined, of which the following is a specification.

This invention relates to a bit-brace and hand-drill combined; and consists in a novel construction and arrangement of parts whereby, principally by the employment of a removable clamp or yoke, the device may be used without the yoke or clamp as a bit-brace, or with the yoke or clamp as a drill, as hereinafter described and illustrated in the accompanying drawings, in which Figure I is a plan view of my improved device in position for use as a drill. Fig. 2 is a sectional-view taken on line so, Fig. 1. Fig. 3 is a sectional View taken on line y, Fig. 1.

Similar letters of reference indicate corresponding parts.

A represents the stock or handle provided with the usual button c, ratchet head B, and

ratchet wheel and pawls G,- all constructed as usual.

D isa chuck constructed to receive and hold either a bit or drill, by means of suitable jaws D. The upper end of the chuck screws upon the bifurcated screw d into which is fitted and securely fastened the shaft E which extends to the ratchet head and is rotated by the stock. Fitting loosely upon this shaft is a sleeve F externally screw-threaded and provided at its upper end with the integral hand wheel or finger wheel H. A suitable washer e lies on the shaft E between the sleeve Fand the screw d.

K is a nut running on the thread on the sleeve F.

L P are two 'curved jaws having their eX- tensions L P hinged together at Z and having their opposite extensions L P adapted to be secured together by a hand screw m. The

portion L of the jaw L is shorter than the l portion P of the jaw P, and said portion P is bent up at P so as to leave a space between said portion P and the portion L", and the inner ends of said portions P f and L are beveled at 'n (as shown in Fig. 1) so as to catch and hold the links at the free end of a chain, as R, whose other end is secured at R at the pivotal point Z. These jaws eonstitute a yoke, and their inner surfaces are hollowed out into the shape indicated in Fig. 2 and by broken lines in Fig. 3, su'ch shape itting the nut, which in this instance has six faces, and has on its opposite sides small annular shoulders K upon which the inner edges of the shells which constitute the jaws P L of the yoke rest.

When the device is to be used as a bit, neither the yoke P L nor the chain R is used, both being removed. Moreover the nut K, the hand wheel H and the threaded surface of the sleeve F are not in use. The stock is simply rotated, and the shaft E rotates the chuck and bit in the usual manner; but when the device is to be used as a drill as indicated in the drawings, in which it is represented as drilling a hole in a metal pipe S, the yoke L P is secured in position on the nut K by means of the hand screw m, and the drill is held up to its work by the chain R which is made taut by catching it between the outer end of the jaw L and the inner surface of the portion P of the jaw P. Now as the device is held in the'ordinary position, which is usually with the button pressed by the body of the user, as the stock A is rotated, with the effect of driving the drill into the metal, the threaded sleeve F remains stationary, as does also the yoke P L and consequently the nut K. The effect of this is of course to slacken the chain R as the drill enters the metal. In order to prevent this slackening of the chain the hand wheel I-Iis turned by the thumb or finger of the operator, thus rotating the sleeve F just enough to cause the nut K and consequently the yoke P'L to travel back on said threaded sleeve suciently to keep the chain taut. By reversing the movement of the hand wheel or feed wheel H the chain R will be loosened and can be disconnected.

Thus it will be seen not'only that the device is adapted for use both as a drill and bit, but also that when it is to be used as a bit the yoke and chain being removable, are out of the way and do not serve to cucumber the tool.

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

ICO

In a bit-brace and hand-drin combined, the

sleeve F on said shaft and externally screwthreaded, hand Wheel or feed Wheel H rigid with said sleeve and nut K running on said threaded sleeve, of the removable yoke oonsisting of a pair of jaws pvoted together at one end and adapted to be secured together at the other end, said jaws being adapted to clamp the nut and prevent movement thereof with relation to the yoke, and said yoke being adapted to receive the opposite ends of the ro chain which is passed around the Work, substantially as set forth.

CHARLES D. CUTTS. W itnesses:

HENRY W. WILLIAMS, E. A. WooDBURY.

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