US1411365A - Wrench - Google Patents

Description

J. MITCHELL.

WRENCH.

APPLICATION FILED ocr 3|, 1921.

1,41 1,365. Patented Apr. 4, 1922.

RI a g anuen toz Joseph Mitchell UNITED STATE aosnrn MITCHELL, or rnarviineron, conunorronr.

w'anncn.

Specification of Letters Patent.

Patented A r. 4, 1922.

Application filed 0ctober'31, 1921. Serial No. 511,561.

1 '0 all whom it mag concern:

Be it known that I, JOSEPH MITQHELL, a citizen of the United States, residing at l arm-ington, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in renches, of which the following is a specification, reference being had to the accompanying drawings. v

This invention relates to certain improvements in wrenches and has relation more particularly to a device of this general character of a ratchet type and it is an object of the invention to provide a device of this general. character having novel and improved means whereby the same is particularly adapted for nse in connection with work which is dil'licult of access, such as in the repairing of automobiles and the like.

Another object of the invention is to provide a novel and improved device of this general character wherein means is provided to change the positions of the pawls to engage the device to be operated in either direction, to the right or to the left.

Furthermore, it is an object of the invention to provide a novel and improved device of this general character embodying a handheld and a lever each in ratchet connection with the shank of the tool whereby both the hand-hold and the levermay be operated to impose the requisite force or strain to the shank during a working operation and whereby either the hand-held or the lever may be employed one independently of the other to turn the shank. v

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved wrench whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed;

In order that my invention may be the better understood," I will now proceed to describe the same with reference to the accompanying drawings, wherein:

Figure 1 is a view partly in elevation and partly in section of a wrench constructed in aecordance with an embodiment of my inventron;

l igure 2 is a sectional view. taken substantially on the line 2-2 of Figure 1;

Figure 3 is a sectional view taken substantially on the line 3-3 of Figure 1; and

Figure at is a sectional view taken substantially on the line 4:4: of Figure 1.

As disclosed in the accompanying drawings, 1 denotes an elongated shank having one end portion 1 circular in cross section with the remaining portion angular in cross section. Rotatably mounted upon the portion 1 of theshank l is a hand-hold 2, said iand-hold including a sleeve which sun rounds the portion 1 of the shank 1 and which is held in applied position by the collars a and 5, the collar 5 being removable.

The portion 1 extends within the loop 6 of the hand-hold or outwardly of the sleeve 3 and fixed to said extended portion is a toothed wheel 7. Coacting with the toothed wheel 7 is a pawl or dog 8 herein disclosed as in the form of a crescent and which has its central portion rotatably mounted upon a pin 9. The pin 9 is disposed through the bearing 10 formed in the inner portion of the hand-hold 2 and disposed substantially in parallelism with the shank 1.

Rotatably engaged with the pin 9 outwardly of the pawl or dog 8 is an arm 11. Disposed through the outer or free end portion of the arm 11 and extending beyond opposite sides thereof is a pin-12, one end portion of the pin overlying the rear or outer ec go of the dog or pawl 8f Secured, as at 14:, to the opposite end portion of the pin 12 is a retract-ile member 15 herein disclosedias a coiled spring, the opposite end portion of said member being attached, as at 16, to the hand-hold 2.

The retractile member 15 serves to con- V stantly maintain an end portion of the dog or pawl 8 in operative engagement, with the toothed wheel 7 to either hold the shank 1 against rotation or to impart rotation to said shank 1 upon turning movementof the hand-hold 2 in one direction. When it is desired to reverse the directi'on of rotation of theshank 1 upon manipulation of the hand hold 2, the arm 11 is swung around to engage the opposite end portion of the dog or pawl 8' as, for instance, in a position reverse to that shown in Figure 2 of the accompanying drawings.

The pin 9 hereinbefore referred to may be maintained in applied position in any desired manner but preferably through the instrumentality of the cotter pins 17.

18 is a sleeve adapted to be slidably mounted upon the shank 1 and whichhas one end portion 18 circular in cross section. Mounted upon the portion 18 for rocking movement is a handle member 19 carrying a pawl 20 coacting with a ratchet wheel 21 fixed to the sleeve 18. The handle member 19 and the ratchet wheel 21 are maintained in desired positions upon the sleeve 18 through the medium of the collars 22.

Secured, as at 23, to the periphery of one of the collars 22 is an end portion of a resilient member 24. The free end portion of the member 21 carries an inwardly directed pin 25 which is adapted to be directed through an opening 26 in the sleeve 18 and a be received within one of the longitudinally spaced recesses 27 provided in a face of the shank 1 so that the sleeve 18 may be locked at different points along the shank 1 as the reniiremeuts of practice may necessitate.

'.he handle member 19 provides means whereby the shank 1 may be rotated and it is to be understood that the pawl 20 is of a reversible character so that the handle member 19 may be employed to rotate the shank 1 either to the right or to the left. When the handle member 19 is being employed to operate the shank 1, the pawl or dog hereinbefore referred to is adjusted into desired position to hold the shank 1 against retrograde movement. In the event the handhold2 is employed to effect the desired rotation of the shank 1, the pawl 20 of the handle member 19 serves to hold the shank against retrograde movement.

' While the hand-hold ,2 and the handle member 19 may be employed one independma of the other to effect the requisite or desired rotation of the shank 1., it will also be understood that they may be employed in unison and especially when increased power is required during a working operation.

The outer end portion'of the shank 1 or that portion remote from the hand-hold 2 is provided in one of its faces with a longitudinally disposed elongated recess 28 in which is pivotally mounted alatch member 29, the working end portion of said member 29 being constantly urged outwardly by the expansible member or spring 30 positioned within the recess 28. This latch member 29 is adapted to have locking engagement with an applied sleeve 31. The sleeve 31 as herein disclosed is provided with a socket 32 whereby the samemay be employed as a wrench and while my invention is primarily adapted for use as a wrench, it is to be understood that the same can be employed for other purposes as determined by the character of the working member carried by the sleeve 31.

From the foregoing description it is thought to be obvious that a wrench constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not Wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

I claim:

1. A device of the, character described comprising, in combination, a shank, a working member engageable therewith, a hand-hold freely mounted on said shank whereby said hand-hold and shank are capable of independent rotation, a toothed wheel carried by the shank, a holding dog carried by the hand-hold for engagement with the toothed wheel, means for pivotally supporting the dog substantially midway its length and means for constantly urging either end portion of the dog in engagement with the toothed wheel.

2. A device of the character described comprising, in combination, a shank. a working member engageable therewith, a hand-hold freely mounted on said shank whereby said hand-hold and shank are capable of independent rotation, a toothed wheel. carried by the shank, a holding dog carried by the hand-hold for engagement with the toothed wheel, means for pivotally supporting the dog substantiall midway its length and means for constant y urging an end portion of the dog in engagement with the toothed wheel, said last named means be ing operable to coact with either end portion of the dog. o

3. A device of the character described comprising, in combination, a shank, a

working member engageable therewith, a 1

hand-hold freely mounted on said shank whereby said hand-hold and shank are capable of independent rotation, a toothed wheel carried by the shank, a holding dog carried by the hand-hold for engagement supporting the dog substantially midway its length, a rock arm, and means for con- 10 stantly urging the rock arm toward the dog, said rook arm having contact with the dog at either side of its central mounting.

In testimony whereof I hereunto affix my signa ture.

JOSEPH MITCHELL.

Images