GB130613A - Improvements in Wrenches. - Google Patents

Abstract

130,613. Ferguson, R. B. July 30, 1918, [Convention date]. Pivoted and sliding jaw wrenches. - A pipewrench adapted also for nuts comprises an inner jaw and handle of U-section, an outer jaw having a shank movable in the handle and formed with rack teeth engaging a worm on a worm shaft pivoted on the inner jaw and a spring in the handle for holding the worm and rack teeth in engage. ment. A pivoted loop may be provided to hold the worm shaft and toothed shank in the handle with the jaws parallel for use on nuts. As shown, the U-section handle 5 has lateral projections between which the block 7 forming the inner jaw is riveted at 8. A recess in the block 7 receives the end of the worm shaft 9, which is pivoted therein at 10. A worm 12, held revolubly on the shaft 9 by a sleeve 13, engages teeth 16 on the shank 14<a> of the outer jaw 15. A spring 14 in the handle 5 presses the shank 14<a> and worm outwardly, holding the worm and teeth in engagement, the outward movement being limited by the engagement of the worm shaft 9 with the block 7. A luop 17 of wire may be pivoted in the handle for engagement on the end of the shaft 9 to hold the shank 14a depressed and the jaws parallel.