US1014370A - Monkey-wrench. - Google Patents

Description

P. H. BURGART.

MONKEY WRENCH. 5 APPLICATION FILED AUG. 26, 1911 Patented J an. 9,1912.

m W a e t m m m,

PHILIP I'I. BURGART, OF CHICAGO, ILLINOIS.

MONKEY-WRENCH.

Specification of Letters Patent.

Patented Jan. 9, 1912.

Application filed August 26, 1911. Serial No. 646,167.

To all whom it may concern Be it known that I, PHILIP H. BURGART, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in -Monkey- WVrenches, of which the following is a specification.

My invention relates to improvements in monkey wrenches and has for its object the production of a wrench of this character which will be so designed as to be adapted for ready and expeditious adjustment in use.

A further object is the production of a monkey wrench which will be of durable and economical construction and efficient in operation.

Other objects will appear hereinafter.

'With these objects in view my invention consists in the combinations and arrangements of parts hereinafter described and claimed.

My invention will be best understood by reference to the accompanying drawing forming a part of this specification, and in which,

Figure 1 is a side elevation of a monkey wrench embodying my invention, Fig. 2 is a slightly enlarged transverse section taken on line wm of Fig. 1, and Fig. 3 is a fragmentary section taken on line y-y of Fig. 2.

The preferred form of construction as illustrated in the drawing comprises a shank 1 provided at one end with the stationary jaw 2 and at its other end with the handle 3. The shank 1 is screwthreaded at opposite sides 4, the remaining opposite sides of said shank being flattened or cut away as clearly shown in Fig. 2. Slidably mounted upon the shank 1 is the movable jaw 5, said jaw being provlded with a depending extension 6 which terminates at its lower end in a strap or loop 7 which slidably embraces said shank in the same manner as said jaw 5.

Arranged below the portion 7 of the jaw 5 is the nut 8, the interior of said nut being threaded at opposite sides to correspond with the threaded portions of said shank, as clearly shown in Fig. 2. The arrangement is such, as will be observed, that in one position of said nut as shown in the several figures the threaded portions of said nut will be in engagement with the threaded portions of said shank, turning of said nut through 90 degrees disengaging said threaded portions to permit of free sliding of said nut upon said shank. Said nut 8 is provided adjacent its upper end with a circumferential groove 9 which is loosely engaged by an inwardly projecting lug 10 formed at the lower extremity of the extension 6. Said lug and groove evidently serve to establish an operative connection between the nut 8 and the movable jaw 5 so that the same will move in unison, said groove being of such a length however, as

to permit of rotary movement of said nut a suflicient distance to effect engagement or disengagement of the threaded portions of said nut 8 and shank. Also formed in one side of the nut 8 is a longitudinally eX- tending groove 11. Arranged in the groove 11 is a leaf spring 12 the lower end of which is securely fastened in said nut by means of an ear 13 bent over the same. The opposite end of said spring is free for movement in said groove 11 which is formed as shown to permit of such movement of said spring, outward movement of the latter being limited however by an ear 14 which is formed upon the nut 8 at the upper end of said groove. Formed in the lug 10 is a notch 15 adapted for engagement by the free end of the spring 12 to serve in cooperation with said spring to lock the nut 8 against rotary movement. The notch 15 .is so positioned,however, that when the spring 12 is in engagement therewith, the threaded portions of said nut will be in engagement with the threaded portions of said shank and so that engagement of said spring with said notch will serve to lock the nut8 in positions of threaded engagement thereof with the shank 1. The central portion ofthe spring 12 is bent outwardly as shown so that the same may be readily engaged by the finger to effect depression of the free end thereof for releasing the nut 8 when desired.

In operation whenit is desired to set the jaws of the wrench at a definite distance so as to grasp an object, the nut is turned until the unthreaded portions therein register with the threaded portions of the shank, the circumferential groove 9 in said nut permitting of such movement of said nut without affecting the movable jaw 5. The nut and movable jaw are then pushed toward the stationary jaw the desired distance, this being expeditiously done since the parts will slide freely over the threads of the shank. The nut is now turned until its threads engage the threads of the shank, causing the movable jaw to tightly grasp the object which it is desired to clamp. hen the nut 8 is turned as last named the spring 12 will engage the notch 15 thereof to lock said nut and hence the movable jaw 5 in adjusted position. When it is desired to release the jaw, a slight retrograde turn of the nut will effect the unlocking of the parts or the dis-' engagement of the threads thereof and permit of a quick and easy backward movement of the movable jaw and nut, when they may be set as before.

A monkey wrench of the construction set forth is durable and economical and the same is of high efficiency in use.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having describedmy invention what I claim as new and desire to secure by Letters Patent is:

1. A monkey wrench comprising the usual jaws; a shank threaded upon two of its sides; a nut threaded to correspond with said shank to permit of longitudinal sliding of said nut upon said shank when disengaged from the threads of said shank, said nut having a circumferential groove formed thereinfor the reception of a lug upon the movable jaw; a longitudinal groove in said nut; and a spring catch releasable by depression in said longitudinal groove engaging said lug of said movable jaw for locking said nut in positions of engagement with the threads of said shank, substantially as described.

2. A monkey wrench comprising the usual jaws; a, shank threaded upon two of its sides; a nut threaded to correspond with said shank to permit of longitudinal sliding of said nut upon said shank when disengaged from the threads of said shank, said nut having a circumferential groove formed thereinfor the reception of a lug upon the movable jaw; a longitudinal groove in said nut; and a leaf spring catch releasable by depression arranged in said longitudinal groove and having one end secured to said nut, the free end of said catch being adapted to engage a notch in said movable jaw to lock said nut in posit-ions of engagement of said nut with the threads of said shank, substantially as described.

3. A monkey wrench comprising the usual. jaws; a shank threaded upon two of its sides; a nut threaded to correspond. with said shank to permit of longitudinal sliding of said nut upon said shank when disengaged from the threads of said shank, said 4 nut having a circumferential groove formed therein for the reception of a lug upon the movable jaw; a longitudinal groove in said nut; and a leaf spring catch releasable by depression arranged in said longitudinal groove and having one end secured to said nut, the free end of said catch being adapted to engage a notch in said lug .of said movable jaw for locking said nut in positions of engagement with the threads of said shank, said catch being formed for manual engagement to effect depression thereof, substantially as described.

4. A monkey wrench comprising the usual jaws; a shank threaded upon two of its sides; anut threaded to correspond with said shank to permit of longitudinal sliding of said nut upon said shank when disengaged from the threads of said shank, said nut having a circumferential groove formed therein for the reception of a lug upon the movable jaw; a longitudinal groove in said nut; a leaf spring arranged in said longitudinal groove and having one end secured to said nut, the free end of said spring being adapted to engage a notch in said lug of said movable jaw for locking said nut in positions of engagement with the threads of said shank, said spring being formed for manual depression to effect the release of said nut; and means for limiting the outward movement of the free end of said spring, substantially as described.

5. A monkey wrench comprising the usual jaws; a shank threaded upon two of its sides; a nut threaded. to correspond with said shank to permit of longitudinal sliding of said nut upon said shank when disengaged from the threads of said shank, said nut having a circumferential groove formed therein for the reception of a lug upon the movable jaw; a longitudinal groove in said nut; and a leaf spring arranged in said longitudinal groove and having one end secured to said nut, the free end of said spring being adapted to engage a notch in said lug of said movable jaw for locking said nut in positions of engagement with the threads of said shank, the central portion of said spring being bent outwardly for manual depression of the free end thereof to effect the release of said nut, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

PHILIP H. BURGART.

Witnesses:

' ARTUHR A. OLSON, HELEN F. LILLIs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

A Washington, D. C.

Images