US1746452A

US1746452A - Wrench

Info

Publication number: US1746452A
Application number: US338278A
Authority: US
Inventors: Douglas B Wesson
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-02-07
Filing date: 1929-02-07
Publication date: 1930-02-11
Anticipated expiration: 1947-02-11

Description

Patented Feb. 11, 1930 UNITED STATES DOUGLAS B. WESSON, on LONGMEADOW, MASSACHUSETTS:

WRENCH Application filed February 7, 1929. Serial No. 338,278.

' This invention relates to wrenches, and has for its main object the provision of a set of wrenches adapted to interlock one with another so that the effective leverage of any wrench may be increased at will. A further object of the invention is to provide a set of wrenches in which this desirable interlocking feature is attained by very simple means and without increasing greatly the cost of the several wrenches. Other and further objects will appear from the following description and claims.

Referring to the drawings: Fig. 1 shows a set of wrenches constructed in accordance with my invention Fig. 2 shows the manner of increasing the leverage of a Wrench by the use of the next larger wrench of the series; V

Fig. 3 shows the manner of increasing the leverage of a wrench by the use of the next smaller Wrench of the series; Fig. 4., as contrasted with Fig. 3, shows the unloosening instead ofthe tightening of a nut;

2 Fig. 5 is a section on line 55 of Fig. 2;

Fig. 6 shows one manner of coupling certain wrenches together; and

Fig. 7 shows another manner of coupling certain wrenches together.

In Fig. 1, I have shown a set of Wrenches 1.0, 11, 12, 13 and 14, each having nut-receiving openings 15 at its opposite ends. Each opening has parallel, fiat surfaced, nut-grip ping walls 16 as is common in wrenches of i this general tye. The outer edge surfaces of thewrench ends indicated at 17, may be rounded as is customary, except at portions indicated at 18 which are flattened off (Fig. 5). These surfaces are formed at such an angle as to lie substantially parallel to the inner surface 16 of another wrench when the two wrenches are interlocked as shown in Fig. 2. Exact parallelism of the surfaces is not necessary, gripping action being obtamed even if the surfaces are only in line The manner in which the wrenches interlock is shown in Fig. 2. In this illustration, anut 21 is being tightened by the wrench l2,'the leverage of which is being increased by theuse of the wrench 13. One corner 20 of the wrench 13 is in line contact. with one of the inner surfaces 16 of the wrench 12, while the outer flattened surface 18 on the same jaw is in surfaceor line contact with the opposing inner surface 16. If the surface 18 is exactly parallel to the surface 16 when the wrenches are in interlocked position, the shape of the end surface 19 of Wrench 12 is not of particular importance; but if the sur faces depart from parallelism so that the contact is through the corner 20 ofwrench 12, the end surface 19 ispreferably blunted off so that line contact results. The employment of line contact for causing the interlocking of the wrenches gives adegree of stability to the interlocked wrenches much greater 5 to than would result were the surfaces rounded so that rocking contact would result. In actual use of wrenches constructed inaccordance with my invention, the leverage of each wrench can be extended by interlocking it with another of the series without danger of the wrenches slipping apart.

While in Fig. 2 I have shown the leverage of the wrench 12 being extended by the use of the next larger wrench of the series, it is also 3 possible to employ the next smaller wrench 11, as shown in Fig. 3. Both of these figures show the use of a pair of wrenches for tightening a nut. My improved wrenches are also adapted for use in unloosening the nut, as isshown in Fig. 4. This view shows an operation the reverse of that appearing in Fig. 3, using the same pair of wrenches. Figs. 6 and 7 areviews showing additional combinations of the wrenches. "Q0

What I claim is:

1. A wrench designed for use in sets comprising jaws at each end presenting a recess to receive a nut, the jaws terminating in straight lined corner portions adapted to engage one inner jaw surface of another Wrench of the set, said jaws having flattened outer surfaces adapted to engage the opposite inner jaw surface of said other wrench. 2. A. wrench designed for use in sets comprising jaws at each and presenting a reoess to receive a nut, said jaws having flattened outer surfaces adapted to engage one inlzler jaw surface of another wrench of the 3. A set of double end wrenches having the jaws of each wrench conformed for engagement with another Wrench of the set so as to serve as a leverage increasing extenm sion for said other wrench.

4. A set of double end Wrenches having the jaws of each wrench flattened externally for line engagement with the jaws of another wrench of the set so as to serve as a 15 leverage increasing extension for said other wrench.

5. A set of double end Wrenches having the ends and sides of the jaws of each Wrench flattened soas to have line engagement respectively with opposite inner surfaces of the jaws of another Wrench of the set.

In testimony whereof I have affixed my signature.

DOUGLAS 13. WESSON.