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Publication numberUS1148410 A
Publication typeGrant
Publication dateJul 27, 1915
Filing dateMar 11, 1915
Priority dateMar 11, 1915
Publication numberUS 1148410 A, US 1148410A, US-A-1148410, US1148410 A, US1148410A
InventorsFrank E Smith, George W Smith
Original AssigneeFrank E Smith, George W Smith
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1148410 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

F. E. & e. w; SMITH.


, Patented July 27, 1915.



Specification of Letters Iatent.

llateiitetl July 27, 11115.

Application filed March 11, 1915. Serial No. 13,624.

provide an easily controlled device or mechanism for preventing the undesirable movement of the movable jaw when it is necessary or required for such jaw to be retained in any predetermined position to which it may be adjusted as, for instance, for repeated operation upon the same nut or upon a number of nuts of the same size.

The foregoing and other objects of the invention willhereinafter be more fully described and claimed and illustrated in the drawings forming a part of this spemfication in which like characters of reference indicate corresponding parts in all the views,

and in which Figure 1 is a side elevation of a well known form of wrench showing our invention applied thereto, a portion of the wrench being broken away on a vertical plane corresponding to the broken line 11 of Fig. 3; Fig. 2 is a side elevation of the same; Fig. 3 is a top plan view; and Fig. 4 is a longitudinal section on the line 41 of Fig. 1.

The several partsof. this device may be made of any suitable materials, and the rela' tive sizes and proportions, as well as the general design of the mechanism, may be varied to a considerable extent without departing from the spirit of the invention hereinafter more fully described and claimed. v

Referring more particularly to the drawings, we show a type of monkey wrench in which is a fixed jaw 10 and a movable jaw 11. The movable jaw is shown provided with a shank 12 extending at right anglesto the active face of the jaw 11 and provided with a series of teeth 13 cooperating with a worm 14L journaled upon a pivotpin 15 arranged parallel to said shank.

W'ithout extending the description of the wrench mechanism Peruse unnecessarily, it may be noted that the features thus far described are or may be of any well known'or suitable construction and furthermore that our invention is adapted to be applied to various specific types of monkey wrenches .or other wrenches which involve relatively fixed and movable jaws and controlled by a rotating screw or worm. I

It is well known that after a wrench is used and laid aside, thereis a common tendency for the screw or worm to be moved or rotated with a corresponding variation in adjustment of the movable jaw of the wrench. Our purpose is to provide a simple and reliable form of locking device to prevent rotation of the worm and hence a change of adjustment of the wrench. To this end we provide for the worm in circu lar series of teeth or notches indicated at 16 and shown herein as beingarranged in a circle around one end of the worm. At 17 we show a keeper in the form of a lever of the first class pivoted at 18 in a cavity 19 formed inthe handle or shank portion of the wrench adjacent the worm 14:. One end of the keeper constitutes a finger 17 adapted to enter any one of the notches 16, and p when in such position will prevent rotation of the worm. The other end of the lever projects through a slot 20 beyond the wrench handle and terminates in a knob or other suitable finger piece 21 whereby the lever may be swung far enough around its axis 18 to throw the finger 17 into or out of.

locking engagement with the worm. As a suitable means for holding the keeper in either position to which it may be moved by the operation of the finger piece 21, we provide an angular extension 22 in the form of a triangle having its altitude extending from the pivot 18 substantially at a right angle to the main or longer axis of the lever. The point of the projection 22 cooperates with a leaf spring 23 having its ends seated in notches at one end of the cavity 19. The spring permits the point of the extension 22 to ride over the angle formed in the middle portion of, the spring, but the spring has force enough to prevent the accidental movement of the keeper in either direc tion. The finger piece 21, being within easy reach of the operators thumb or finger while manipulating the wrench, may be easily operated to either lock or unlock the wrench as occasion may require. If the lock is not needed at any particular time, it will be swung out of contact with the worm and will so remain until it is returned to locking positionby positive operation of the keeper. The cavity 19 is closed preferably by a face plate 24.

\Ve claim:

1. In a wrench, the combination with relatively fixed and movable jaws and a worm cooperating with the movable jaw and movable around an axis parallel to the direction of movement thereof, of a keeper for the worm comprising a lever having at one end a finger adapted to engage the worm and 'having a projection extending from the lever pivot at an angle to the main axis of the lever, said extension terminating in a point, and a leaf spring having constant cooperation with said extension pointand serving to hold the lever in either its looking or unlocking position.

2. In a wrench comprising relatively fixed and movable jaws and a worm coi'iperating with the movable jaw for controlling its position, said worm having a series of teeth arranged in a circle around one end thereof. a keeper pivoted adjacent the worm and including a finger-at one end adapted to move into the space between any two adjacent teeth aforesaid. said keeper having a projection extending from the pivot thereof at an angle to the main part of the keeper, and a spring cooperating with said projection and serving to hold the keeper in either its locking or unlocking position.

I In a wrencln the combination with relativcl v fixed and movable jaws and a worm coi'iperating with the movable jaw and serving'to control its position. said worm having a circular series of notches around one end of a keeper adjacent the worm and in-

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2574834 *Oct 8, 1947Nov 13, 1951Leonard John RPipe wrench
US2643569 *May 3, 1950Jun 30, 1953Utica Drop Forge & Tool CorpSlidable side jaw wrench
US2804793 *Nov 9, 1955Sep 3, 1957Coughlin Francis GWorm-latch means for a slidable side-jaw wrench
US2849908 *Aug 6, 1957Sep 2, 1958Diamond Calk Horse Shoe CompanLocking open end wrench with lock retaining means
US2859650 *Oct 19, 1956Nov 11, 1958Barnes William ALocking mechanism for adjustable jaw wrench
US2905037 *Sep 9, 1957Sep 22, 1959Pendleton Tool Ind IncWorm locking means for adjustable jaw wrench
US3326068 *Nov 15, 1965Jun 20, 1967Lanzetta George JSliding side jaw wrench having a worm gear adjustment gear
US4472879 *Nov 24, 1980Sep 25, 1984Sizemore Jr Herbert HAdjustable multi-purpose knife structure
US4653357 *Jun 28, 1985Mar 31, 1987Rolf CarlmarkWrench
US6951157 *Mar 9, 2004Oct 4, 2005John TedrickWrench, adjustable with locking pin
US20050199106 *Mar 9, 2004Sep 15, 2005John TedrickWrench, adjustable with locking pin
US20050262972 *Aug 1, 2005Dec 1, 2005John TedrickWrench, adjustable with locking plate
DE1146010B *Apr 8, 1958Mar 21, 1963Diamond Tool And Horseshoe CoSchraubenschluessel mit einer ueber eine Stangenverzahnung durch eine Schnecke verstellbaren Backe
U.S. Classification81/165, 81/DIG.300, 81/170
Cooperative ClassificationB25B13/14, Y10S81/03