US303643A

US303643A - Brace

Info

Publication number: US303643A
Authority: US
Publication date: 1884-08-19
Anticipated expiration: 1901-08-19

Description

(No' Mo del.)

J. W. JOHNSON.

BEACH.

No. 303,(343. Patented Aug. 19, 1884.

WITNESSES: I VENTOR. I %lam (Bi UNITED STATES PATENT Orrca JAMES VVILLIAM JOHNSON, OF OTTA\VA, KANSAS. i

BRAC E.

SPECIFICATION forming part of Letters Patent No. 303,(543, dated August 19, 1884.

Application filed January 9, 1884.

To all whom it may concern:

Be itknown that I, JAMES WV. JOHNSON, a citizen of the United States, and a resident of Ottawa, in the eounty of Franklin and State of Kansas, have'invented certain new and useful mprovements in Braees; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it ap pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which- Figure 1 is a side View of my improved brace. Fig. 2 is a longitudinal sectional view of the same. Fig. 3 is a cross-seetional View taken on line x w, Fig. l. Fig. et is a detail View of the lever or eccentrie by which the clamping-jaws are locked in their closed posi tion, and Fig. 5 is a similar view of the clamping-jaws.

Similar letters of reference indicate corresponding parts in all the figures.

My invention rclates to that class of braces or bit stoeks in which a pivoted eccentric provided with a suitable handle is adapted to lock the anger or drill which is being used in its operative position in the brace; and it consists in the improved Construction and combination of parts of a brace of the above-mentioned class, as will be hereinafter more full y described and claimed. v

In the aocompanying drawings, A repre sents the main portion or body of the brace, which is provided with a longitudinal recess, A which diminishes in width as it enters into the body A.

In one side of the wall of the recess A', and conmunicating with the same, is a second and smaller reeess, A for the purpose hereinafter specified. One side of the body A is provided with a slot, B, communicating with the longitudinal recess A the said slot being preierably made on that side of the body A which is opposite to the side in which the smaller recess A is cut. XVithin this slot is pivotally secured the eceentrie B, which is provided with a suitable handle, B', which lies close against the side of the brace when the drill or other tool is locked in its operative position within the same. i

C indicates the removable elamping-jaws, which are shown in detail in Fig. 5` of the drawings, the said jaws being suitabl'y recessed` upon their inner sides or faces at c for (No model.)

the reception of the npper end of the drill or other tool which it is desired to enploy. These jaws are hin ged together at their npper ends at G', one o fthem-the larger or thickerbeing provided with a lug or projection, G", adapted to fit within the smaller' recess A" while the other jaw is beveled or cut away upon its outer side.

To operate my improved brace, the handle B' of the eccentric B is thrown out into the position shown in dotted lines in Fig. 2 of the drawings, when the thimer clamping -j aw can be swung into its open position and the upper end of the tool readily inserted, when by pressing the handle of the eccentric back into its closed position the tool will be firmly locked within the brace, the lug or projeetion C on the thicker clamping-jaw serving to prevent the jaws from being forced out by the lookingeccentric or from being pulled out by the tool. The npper end of the body of the brace is provided with a suitable screw-threaded apertnre, D, which admits of the brace being readily attached to any ordinary bracestock or drillstock.

From the forcgoing description, taken in connection with the accompanying drawings, the Construction and operation of my im proved brace will readily be understood without requiring further xplanation.

It will be seen that my improved brace is simple in Construction, and is therefore not liable to break or get out of order, while by construeting the clampingjaws in the manner described they can, when worn through use, be readily removed and a new pair substituted, as will readily be understood.

Having thus described myinvention, I claim and desire to secure by Let-ters Patent of the United States- As an improvement in braees, the combination of the bracebody A, provided with a screw-t-hrcaded aperture, D, longitudinal recess A', smaller reoess A, and slot B, eccentric B, having an operatinghandle, B', and hinged clamping-'aws G, one of which is pro vided with a lug` or projection, C", all constructed and arranged to operate substantiall y in the manner and for the purpose shown and described.

JAMES XVILLIAM J OHNSON.

XVit'nesses:

GEO. D. STINEBAUGH, J C. BARRICKMAN.