US228810A - Albeet d - Google Patents

Description

(No Model.)

A. D. GOODELL. Ratchet Bit-Brace.

No. 228,810. Patented June I5,

NJETERS. PHOTO-UTOGHAPNER. WASHINGTON. D C.

UNITED STATES PATENT OFFICE..

ALBERT D. GOODELL, OF MILLERS FALLS, MASSACHUSETTS, ASSIGNOR TO MILLERS FALLS COMPANY, F SAME PLACE.

RATCHET BIT-BRACE.

SPECIFICATION forming part of Letters Patent No. 228,810, dated June 15, 1880.

Application filed March 5, 1880.

T0 all whom it may concern Be it known that I, ALBERT D. GooDELL, of Millers Falls, in the county ot' Franklin and Commonwealth of Massachusetts, have invented a new and useful Improvement in Ratchet Bit-Braces, of which thefollowin g is a full and clear description.

My invention relates to that class of bitbraces to which is attached a ratchet and 1o pawl, to enable one to use a boring-tool or other in a brace when, from its being in a conined position or otherwise, it is convenient to turn the tool in working condition partly around, and turning the handle back without working the tool, the ratchet sliding under the pawl, the tool comes back to a working position, as before.

All of my invention is represented in the accompanying drawings, of which- Figure 1 is an elevation of the brace, partly in section Fig. 2, a horizontal section on line x x of Fig. 1. Fig. 3 is a detail, showing the relation of ratchet to pawl.

All the parts ofthe bit-brace which hold the boring-tool, as the jaws, the slotted socket in which they work, and the sleeve-nut which retains them, are supported by, secured to, and dependent on a standard, A, which passes through the lower end of the bit-stock in the 3o same plane with the handle and the breastpiece or head, and Aalso through the ratchet B,

which controls the action ot the boring, and in which it is secured by a pin, a, passing through the ratchet and the standard.

The lower end ot' the bit-stock is slotted at a right angle to the plane of the handle, head, and boring-tool deep enough to receive the ratchet B and pawl C behind it. Back of this slot is drilled'a hole, D, deep enough to re- 40 ceive a small helical spring, E, having on its outer end a stud or face, b, to bear against the pawl and to keep it in bearing against the ratchet. The ratchet B is a section of a cylinder, having through its center a hole, through 4 5 which passes the standard A, holding the jaws and sleeve which gripe the boring-tool, and to which it is secured by a pin, a, passing through both.

The pawl consists of a small square bar run- (No model.)

ning in the bebre-mentioned slot through the 5o lower end of the bit-stock, and at right angles to the plane of the handle and borin g-tool. On each end of this bar, and bearing against the outer side of the bit-stock, is a button, Gr, with a milled edge to att'ord a grasp whereby to turn 55 the pawl. Within these, and bearing on each edge of the slot, are rounded shoulders H, on the bar, to admit its being turned and to keep it in position. Around the central part of this bar are four projections, one on each side, 6o which form the pawl operating on the ratchet by dropping in turn into the square faced notches on the edge of the ratchet, holding it when turned in one direction, and yielding when turned in an opposite. Two of these projections on opposite sides of the bar have a square Hush face, and as they respectively are let into the notches on the ratchet hold it fast from turning in either direction. 0n the other two sides of the baroneof the projectionsis bev- 7o eled from a square tace down to the bar toward theright, and the one on the opposite side of the bar toward the left., so that when the ratchet, which is attached to the boring-tool, is turned in one direction the square face of the notch in it engages on the square edge of the pawl, and the boring-tool is turned; but it theratchet is turned the other way the edge of the notch slides up each of the inclined sidesot' the projection on the bar forming the pawl till the 8o handle of the bit-stock is turned back, as desired, when it is ready, on being again turned forward, to catch the face of the pawl and hold. The projections on the two opposite sides of the bar being beveled, one to the right and the other to the left, form the pawl, and as it is turned so as to present the one or the other face to the ratchet, so it will operate to work the tool either to the right or to the left.

The buttons on each end ofthe bar forming 9o the pawl are marked in the proper places R. and L.,7 to indicate how the pawl is to be set to work the tool to the right or left. Y

The pawl is kept up against the ratchet by the force ofthe coiled spring with a head let into the bit-stock behind it.

The four corners of the inclined projections forming the pawl are all beveled oie a little to admit their easy Working over the notches forming the teeth of the ratchet and on the face of the spring.

The inner faces of the slot receiving the paWl are Worked out to allow a suflcient space for the points forming the pawl to turn.

The operation of this device is as follows: rlhe boring or other tool being` secured in the socket, the buttons on the end of the pawl, or one of them, is turned so that the letter on its face points outwardly toward the ratchet. If it is the letter R Iche tool will Work from the left to the right7 and the handle return free. If the letter L is pointed out the tool will cut from right to left. If the button is set With E, and bit-stock A, as and for the purpose set forth;

A. D. GOODELL. Vitnesses J AMES S. GRINNELL, FRANCIS M. THOMPSON.

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