US175151A - Improvement in bit-braces - Google Patents

Description

F. P. PFLEGHAR.

BIT-BRACE. No. 175,151.- Patent ed March 21,1876.

N.PETER8. PNOTQ-LITHOGRAPHER, WASHEGTDN. 0 (L ,UNITED STATES.

PATENT QFFIGE.

FRANK PIPFLEGHAR, or new HAVEN, oonnnc'rrcu'r, ASSIGNOR rro WILLIAM A. 'lVES & 00., or SAME PLACE.

IMPROVEMENT IN BIT-BRACES.

Specification forming part of Letters Patent No. 175,151, dated March 21, 1876; application filed January 4, 1876.

to be a full, clear, and exact description of the same, and which said-drawings constitute part of this specification, and represent, in

Figure 1, side view; Fig. 2, central section Figs; 3, 4, 5, diagrams illustrating the operation.

This invention relates to an improvement in bit-braces, the object being to adaptthe' brace to a ratchet operation, so that the crank of the brace may be partially turned, and turn the socket with it, and, then returning the crank for a second hold, the socket will remain stationary; and the invention consists in constructing the socket and crank so that,

- the crank will be free to turn independent of the socket, and with a toothed or ratchet wheel attached to or forming a part of the socket at the bearing in the crank, combined with a pawl in the crank, made adjustable to three positions -one to allow the crank to be turned freely in one direction and'engage .the

socket in the other; a second to leavethe crank free in the opposite direction. to the first, and engageaccordingly; and a third which will engage the socket and crank, so-

, that they turn together in both directions, all

as more fullyhereinatterdescribed.

A is the crank of thebrace, and B the socket, which may be ofany of the usual constructions, so as to engage the toolplaeed Within it, and which is to be turned. The' crank terminates over the socket in a head,

O. In this-head the socket is hung upon a bearing, D, so as to turn freely therein. The head is slotted transversely, and into thisa ratchet, E, is placed, and made fast to the pintle a of the socket; This ratchet E is formed with square shouldered teeth, as shown in Figs. 3, 4, and 5. F is a pawl hung upon a pivot, d, in a vertical recess in the head of the I crank, and so that the axis of the pivot d is at right angles to the axis of the socket, and the pawl slotted, so as to have a slight movement on the pivot d, and in rear of the pawl a spring, 6, is arranged, the tendency of which is to force the pawl toward and into connection with the-ratchet E. The face of the pawl toward the ratchet has upon it three surfaces, 1 2 3, the surface 1 being that seen in Fig. 3, which is beveled, so as to allow the crank to turn freely to the left, and the pawl escape from notch to-notch in so turning; but when turned to the right the pawl will engage the notch in the ratchet, as seen in Fig. 3, and cause the socket to turn with the crank. The second division 2 of the face is square, or at right angles, and so as to engage in one of the notches of the ratchet, and rigidly engage the socket and crank, so that the socket and crank will turn together as one in both directions. The third portion 3 is the reverse of the first, so that the brace will turn free to the right and engage the socket when turned to the left; but the 0I'd61\. of these surfaces may be changed without in any sense changing this invention. The adjustment from one section to the other is made by simply raising or lowering the pawl, as indicated in broken lines, Fig. 2.

I claim The combination, in a bit-brace, of the crank and socket, the socket hung in a bearing in the head 0 of the crank, so as to turn freely therein, the ratchet E, in connection with or apart of the said socket, and the adjustable pawl F, hung in the said head, and relatively to the ratchet E, and constructed with the three Working surfaces, one for turning the socket to the right, another for turning the socket to the left, and a thirdfor rigidly engaging the crank and socket, substantially as described.

Y FRANK P. PFLEGHAR. Witnesses: 7

JOHN E. EARLE, CLARA BROUGHTON.

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