US246513A

US246513A - Frederick w

Info

Publication number: US246513A
Authority: US
Publication date: 1881-08-30
Anticipated expiration: 1898-08-30

Description

(No Model.)

F. W. IRELAND.

BIT BRAGE.

No. M1513.

fly, z,

Patented Aug. 30, 1881.

UNITED STATES PATENT kOEEICE.

FREDERICK W. IRELAND,- OF BUFFALO, NEV YORK.

BIT-BRAC E.

SPECIFICATION forming part of Letters Patent No. 246,513, dated August 30, 1881.

Application filed April 11, 1881.

To all whom it may concern Be it known that I, FREDERICK W. IRE- LAND, of the city of Buffalo, in the county ot' Erie and State of New York, have invented new and useful Improvements in Bit-Braces, ot' which the following is a speciticatiomreference being had to the accompanying drawings.

This invention relates to that class ot' bitbraces in which the socket is provided with two sliding jaws, between which the bit is clamped.

The object of my invention is to produce a simple. and durable brace of this character in which the clamping-jaws can be quicklyopened and closed; and my invention consists of the particular construction ot' the parts wherebyT the bit is held in the socket, and whereby the clamping-jaws are opened and closed, as hereinafter fully set forth.

In the accompanying drawings, Figure l is a sectional elevation of my improved bit-brace, showing the clamping-jaws closed. Fig. 2 is a similar view, showing the clamping-jaws open. Fig. 3 is a fragmentary elevation at right angles to Fig. l. Fig. 4 is a horizontal section in. line fr w, Fig. l. Fig. 5 is an end View of the brace. Fig. 6 is a sect-ion in liney y, Fig. 1. Fig. 7 is an elevation of one of the clamping-jaws at right angles to Fig. 1.

Like letters of reference refer to similar parts in the several gures.

A represents the end of the bent bar ofthe brace, which may be ot any ordinaryT and wellknown construction.

B represents the socket portion, which is secured to the end A of the brace-bar in a wellknown manner.

brepresentsatapering square openingformed in the inner contracted part, B, ofthe socket portion B, for the reception of the square tang O of the brace.

D D are the clamping-jaws, which are arranged in inwardly-diverging ways or grooves d in the outer enlarged part, B2, of the socket portion B. The'ways d are preferably made of dovetail form in cross-section, to confine the jaws D against movement except in thelongitudinal direction of the ways. The clampingj'aws D are arranged on opposite sides of the bit, and their heads or outer enlarged ends are formed to irmly grasp the shank of the bit.

E represents a sleeve which surrounds the (No model.)

socket portion B. The outer' enlarged part of the sleeve slides on the enlarged part B2 ofthe socket portion, and is provided with two inwardly -projecting pins, e, which engage in openings f in the lower ends ot' the jaws D, which latter project below the bottom ot' the enlarged outer part, B2, of the socket portion. By raising or lowering the sleeve E the jaws are correspondingly raised or lowered in their inclined ways, and the heads of thejaWs caused to approach each other or to recede from each other. The pins c are preferably cast with the sleeve E, andthe openings f in the jaws are made in the form of open slots, so that the pins can be engaged in these openings by turning either the sleeve or the socket on its aXis.

g is a spiral spring which surrounds the inner contracted part, B', of the socket portion, and which rests with its inner end upon projecting lips or shoulders h, formed on the part B', and bears with its outer end against the pins @and lugs e', formed in the sleeve E. The spring g tends, therefore, to retain the sleeve E in its outermost position, and the jaws D, which follow the movements ofthe sleeve, are thereby held in a closed position. The inner contracted portion ot' the sleeve E surrounds the spring g, and has its inner end turned inward against the inner contracted part, B', of the socket portion below the projecting lips h. The sleeve E is prevented from turning on the socket portion by a pin or screw, i, which is secured to the sleeve E, and projects into a longitudinal groove or recess, j, formed in the surface of @the inner contracted part, B', of the socket portion.

The parts are readily put together by first inserting the spring g into the cavity of the sleeve E, which is readily accomplished by screwing the spring Vdown over the inwardlyprojecting pins e, then inserting the socket portion into the sleeve by screwing the socket portion down into the spring, the outwardly-projecting lips 7L engaging between the threads of the spring, then engaging the slots f of the clampingjaws with the pins e of the sleeve E, and finally securing the latter against rotary movement by inserting'the pin t'. Vhen the parts are so put together the jaws D will be readily opened by depressing the sleeve E, as shown in Fig. 2, whereby the spring g is compressed. Upon releasing the sleeve E the re- IOO action of the spring g will return the sleeve to its former position and close the jaws D.

Instead of casting the pins e on the sleeve E, they may be secured thereto by screw-threads or otherwise, when the openingsfin the jaws D need not be slotted, and the rotatory movenient of the sleeve will be prevented by the engagement ot' the pins c in the openings f of thejaws without the aid of the pin i.

I claim as my invention- 1. The combination, with a socket portion, B, provided with a tang-seat, b, and inwardlydiverging ways d, which penetrate the enlarged head ofthe socket portion B, of slidingjaws D,

arranged in said ways, and confined thereby both on their inner and outer sides, and a sliding sleeve, E, surrounding the socket portion and connected with the inner ends of thejaws, which latter are closed and opened by theinovements of the sleeve, substantially as set forth.

2. The combination, with the socket portion B, provided with a tang-seat, b, andinwardlydiverging ways d, penetrating the head of the socket portion B, ot' sliding jaws D, arranged in said ways, a sliding sleeve, E, surrounding the socket portion and connected with the inner ends of thejaws, and a spring, g, tending to retain the sleeve and the jaws connected therewith in a closed position, substantially as set forth.

3. The combination, with the socket portion B, provided with inwardly-diverging ways d and slidingjaws D, arranged in said ways, and constructed with openingsfattheirinner ends, ofthe sliding` sleeve E, provided with pins e, pro jecting into the openings j' of thejaws, projecting lips h, formed on the socket portion B, and a spring, g, interposed between the lips h and the pins e, substantially as set forth.

L1. The combination, with the socket portion B, provided with in'.vardlydiverging ways d and sliding jaws D, arranged in said ways, and constructed with openingsfat theirinner ends, of the sliding sleeve E, provided with pins e, projecting into the openings f ot' the jaws, projecting lips h, formed on the socket portion B, a spring, y, interposed between the lips h andthe pins e, and a pin, secured to the sleeve E and projecting into a longitudinal groovc,j, formed in the socket portion B, substantially as set forth.

` FREDERIC K W. IRE LAND.

Vitnesses:

JNO. J. BONNER, EDW. J. BRADY.