US1828561A

US1828561A - Wrench

Info

Publication number: US1828561A
Application number: US494962A
Authority: US
Inventors: Vance C Garrison
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-11-11
Filing date: 1930-11-11
Publication date: 1931-10-20
Anticipated expiration: 1948-10-20

Description

Oct. 20, 1931. v. c. GARRISON.

WRENCH Filed Nov. 11, 1930 Invenlor Vance C. Garrison Allomey Patented Oct. 20, 1931 1 UNITED STATES PATENT? OFFICE.

VANCE C. GARRISON, OF NEBISH, MINNESOTA WRENCH Application filed November 11, 1930. Serial No. 494,962.

ing the actuating means from the movable l jaw at the will of the operator, or if desired the actuating means can be operated to feed the movable jaw to engage various sizes of nuts," bolts and the like in the conventional manner. i f

These and other objects, the nature of the invention, its composition and arrangement and combination of parts will be readily understood by any one acquainted with the art to which this invention relates upon consulting the following descriptions of the drawings, in which I Figure 1 is a side elevational View of my improved wrench.

Figure 2 is a transverse vertical section through Figure Lshowing the details of construction and arrangement of parts.

Figure 3 is a transverse vertical cross-sectional View through the operating worm and its shaft. V

' Figure 4 is a detailed similar cross sectional view of the ramp structure.

Figure 5 is an edge-elevational View of the element disclosed in Figure 3.

Referring in detail tothe drawings the numeral 5 designates generally a wrench of the type described having the stationary jaw 6 and the movable jaw 7. The stationary jaw has a transverse passage therethrough designated 8, and an angular socket 9 leading into the opening 8. In the socket 9 is a helical spring 10 pressing against the bottom of the socket and outwardly and upwardly forcing the end of a pin llon which is rotatably mounted a Worm screw 12 having laterally beveled threads 18, oppositely beveled to the teeth 14 on a longitudinal rack bar on the lower edge of the-movable jaw 7. The pin 11 is adapted to be mounted across the opening 8 and to project a downwardly turned finger portion 15 into the'upper convolution of the spring 10, and the other end of the pin a11-is provided with an annular shoulder 16 for limiting the movement in a longitudinal direction of the worm 12. Outside of the shoulder 16 thenormal contour of the pin ll-continues for a short distance where it is formed with a reduced portion 17 the outerend of which is downwardly and inwardly beveled as shown at 1.8 for engag ing a ramp 19 formed in a screw plug 20 e which is screw threadedly projected through one'side of the stationary aw 6. A longitudinally projecting stop member 21 is mounted just above the ramp 19 to limit the upv. r

pin 11. 7

Apart from the fact that the teeth 14 of therack on the movable jaw 7 are laterally beveled so as to have a longitudinally dey 15 flected angular face it 1s of conventional type with the exception of a downwardly projected foot portion 22 which isladapted to act as a stop member for limiting the outward projection of the end portion 17 of the ward movement of the movable jaw 7, since it is disposed to strike the adjacent or contiguous end. of the worm screw 12. 'An examination of Figure 2 and Figures 8'and 4 of the drawings discloses the fact that the pin 11 is normally so disposed that the worm 1 screw 12 is normally'projected into engagement with the teeth of the rack 14, the finger 15 being disposed in the upper convolution of the spring 10 and theoppositeend ofthe pin 11 rested on the ramp 19 slightly spaced from the stop memberv 2l. i V i Thus the Worm screw 12 is normally projected into mesh with the rack teeth 14, andin this position the usual manner. of operation ofawrench of this type is obtainableby a rotating the screw 12 on the pin 11; Should a quick adjustment of the jaw be required to a smaller size, it is obvious that a quick direct pressure onfthe movable jaw Tiriwardly will result in the yielding of the springlO-to permit said sliding motion by freeing the in structure and material and arrangement screw 12 out of the teeth 14 due to the climbing of the beveled teeth over each other. It is believed obvious that when the sliding movement has ceased, the spring 10 will urge the screw 12 into mesh with the teeth 14 to resist opening of the aw under the pressure of the work. Of course, it is obvious that when the Wrench is desired to be quickly and rapidly opened, the screw may be depressed against the action of the spring 10 to free the teeth and the screw threads of the screw out of engagement to permit the free sliding of the movable jaw 7. The wrench is so constructed that at no time is the screw 12 so much depressed that it will not any longer act as a stop to meet the stop member 22 on the movable aw of the wrench, thus providing that at all times the said movable j aw be positively and effectively. preventedfrom being displaced from assembly with the rest of the wrench or too far opened.

It is thought also to be obvious that when the movable jaw 7 has been roughly adjusted by the said quick sliding motion, the screw 12 may be brought into action to make a finer adjustment of the said position of the movable jaw 7 One of the main advantages of my wrench is that the greater the pressure which tends to open the movable jaw 7, the greater the engagement of the screw with the teeth of the rack 14 will be, since longitudinal pressure will cause the pin 11 to have a thrust toward the ramp 19, which will cause an upward motion of the pin 11 and a consequent more powerful engagement of the threads of the screw 12 with the teeth 14 of the movable jaw 7. It has already been pointed out that the spring 10 has an upward, and, with respect to the pin 11, a longitudinal pressure which maintains the pin and its worm screw 12 properly positioned for all of the said actions of the wrench. Thus the greater the pressure which is brought to bear on the wrench while it is being used, the greater the security of the engagement of the parts so that the rigidity of adjustment which is obtained thereby is such as has not been herebefore achieved in a wrench of this type.

It will now be evident that I have provided a wrench of the type described which embodies features of extraordinary efficiency and handiness as well as qualities of power, fine and rapid adjustment, and other features of novelty and advantage which will be evident as growing out of the above description of the parts and their cooperation which make up my improved wrench.

It is to be definitely understood that I do not desire to limit the application of this invention to the particular modification set out herein to illustrate the principles thereof, and any change or changes may be made through one vertical wall of said opening,

of parts consistent with the spirit and scope of the invention.

What is claimed is 1. A quick adjustable wrench of the type described comprising a handle portion carrying a stationary jaw and a jaw guide, a jaw movable on said guide for cooperation with said stationary jaw, a transverse opening in said handle portion below said guide, an angularly disposed socket communicating a freely mounted pin, a spring in said socket for carrying one end of said pin, a worm screw rotatable on said pin, a ramp engaging face on the other end of the pin, and a ramp mounted in the wall of said opening opposite said socket, said movable jaw provided with a bevel toothed rack on its under edge for coperation with said worm screw, said spring adapted to normally urge said pin for projecting the worm screw into cooperation with the toothed rack of the movable jaw, and causing the said ramp engaging face to climb the said ramp for increasing the locking effect of said worm screw with the rack substantially proportionally to the pressure brought to bear upon the work.

2. A quick adjustable wrench of the type described comprising a handle portion carrying a stationary jaw and a jaw guide, a jaw movable on said guide for cooperation with said stationary jaw, a transverse opening in said handle portion below said guide, an angular-1y disposed socket communicating through one vertical wall of said opening, a

freely mounted pin, a spring in'said socket for carrying one end of said pin, a worm screw rotatable on said pin, a ramp engaging face on the other end of the pin, and a ramp mounted in the Wall of said opening opposite said socket, said movable jaw provided with a bevel toothed rack on its under edge for cooperation with said worm screw, said spring adapted to normally urge said pin for projecting the worm screw into cooperation with the toothed rack of the movable jaw, and causing the said ramp engaging face to climb the said ramp for increasing the locking effect of said worm screw with the rack substantially proportionally to the pressure brought to bear upon the work, said ramp being adjustable and removable.

In testimony whereof I afiixmv signature.

VANCE C. GARRISON.