US273461A

US273461A - Wrench

Info

Publication number: US273461A
Authority: US
Publication date: 1883-03-06
Anticipated expiration: 1900-03-06

Description

J. W. CALEF.

(ModeL) WRENCH.

Patented Mar.6,18 83.

l /A/ i E V. z i I. a Ej INVENTORV WITNSSES- J ATroRNBYs UNITED STAT S PATENTI OFFICE JOSEPH W. OALEF, OF NORTH EASTON, MASSACHUSETTS.

WRENCH.

SPECIFICATION formng part of Letters Patent No. 273,461, dated March 6, 1883. Application filed February 3, 1883. (Moden To all whom it may concrn:

Be it known that I, J OSEPH W. CALEF, of North Easton, in thecounty of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Wrenches; 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 appertains to make and use the same, reference being had to the accompanyingdrawings, which form a part of' this specification, and in which- Figure 1 is a side View of my improved wrench. Fig. 2 is an 'edge view of the same. Fig; 3 is a longitudinal section on line m x, Fig. 1. Fig. 4 is alongitudinal section at right angles to Fig. 3, and Fig. 5 is a detail .view of the sliding jaw.

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

My invention has relation to self-adjustin'g wrenchcs and it consists in the improved construction and combination of parts of the wrench for which Letters Patent No. %26,490 Were granted to me on the 13th day of April, 1880, as hereinafter more fully described and claimed.

In the accompanying drawings, the letter A indicates the stem or shank, which is inserted into a handle, B, and Secured therein. The upper partof the shank forms a head, 0, which forms two cylindrically-recessed shoulders, F, ou eachside of the flattened part G of the head, from the upperedge of which project two lugs *or cars, D and E. This fiattened part G has a perforation, H, through which a pin or bolt, I, passes, which hinges the handle to the rigid jaw J, and the one of the lugs, E, is longer (measured from bolt I) than the lug D.

The jaw J consists 'of two plates, K, which form a recess for the reception of the fiat head G and the sliding jaw L, and a solid jawpiece, M, which connects their upper edges at one corner. i

The sliding jaw L consists of a solid jawpiece, N, and a flat grooved bolt or plate, O, the lower edge of which has two notches or recesses, P and Q, one preferably deeper than 'the other, corresponding to the lugs D and E.

The 'sliding bolt or plate O has two parallel grooves, R, one on each side, in which two parallel flanges, S, one on each inn'er surface of the plates K, fit, keeping the jaw sliding perfectly true. The lower parte of, plates K are perforated at T for the reception of the wrench; but by coustructingthe two lngs of' unequal length (measured from the pivotal pin) and by having the one nearest the rigid jaw-piece the longest, the'latter will serve to open the jaws quickly, and to closethem on the first part of the throw quickly; but on the last part of the throw the smaller lug comes into operation, closing the jaws slower, with greater nicety, while a larger leverage is obtained at the same time upon the handle by the end of the lug being a shorter distance from the pivotal pin, so that the jaws will close firmer around the nut, enabling the wrench to be used on proportionately-small nuts without dan ger of its slippin g.

Having thus'described my invention, I claim and desire to secure by Letters Patent of the United Statesy i 1. 'The combination, in a wrench of the described class, of the sliding jaw having upon its lower edge two recesses, with the pivoted handle having upon its flat head two slightly diverging lugs or ears, of unequal length from the pivotal pin, substantially as and for the purpose shown and set forth.

'2. In a wrench of 'the described class, the combination ot' the handle A B, having fiat perforated head GG,shoulders F,and slightlydiverging lugs D and E, ofunequal length' from the pivotal pin, the rigid jaw J, having solid jaw-piece M, and lower plates, K, having inside flanges, S, and perforated at their lower parts for the reception of pivotal pin I, and having rounded lower edges, U, and sliding jaw L, having solid jaw-piece N and flat sliding bolt 0, grooved at R, and having recesses P and Q at its lower edge, as and for the purpose shown and set forth.

In testimony that I claim the foregoing as IOO