US1334392A - Wrench - Google Patents

Description

H. L. OSMENT.

WRENCH.

APPLICATlON FILED JUNE 26. 1918.

1,334,392. Patented Mm .23,192o.

2 SHEETS-SHEET l.

WITNESSES //v VENTOR v Haw g1, Us mefl/ aim H. L. OSMENT.

WRENCH.

APPLICATION FILED JUNE Z6| 1918.

1,334,392, Patented Mar. 23, 1920.

2 SHEETSSHEET 2.

WITNESSES INVENTOH f/arrylasmenf illl CFC

UNITED STATES PATENT OFFICE.

HARRY LUMPKIN OSMENT. O'F GARTERSVILLE, GEORGIA.

WRENCH.

To all ir/iom may concern.

Be it known that I, Hal-air L. Osurnv'r, a citizen oi? the United States, and a resident or tartersville, in the county of Bartow and tltate of Georgia, have invented a new and .lmproved \Vrench, of which the following is a fulh clear, and exact description.

This invention relates to wrenches and has tor an. object the provision of an improved construction of wrenches ot' the general type. of monkey wrench with an in1- jn'oved. raised portion or cam for causing a gripping oit'the jaws on various shaped. objects when power is applied.

Another object in view is the provision of a handle having a raised cam member and an adjustable jaw formed with a rack bar handing the smooth edge of the rack bar littin against the rounded cam portion whereby one jaw may rock in respect to the other during the gripping action.

A. further object in view is to provide a wrench. having an adjusting screw for the 1111 able jaw which may be quickly discom nected from the movable 'jaw for providing a quick adjustment otthe movable jaw over a considerable distance.

In the accompanying drawings:

Figure 1 is a side view of the wrench disclosing an embodiment of the invention.

Fig. 2 is a section through Fig. 1. on line 2-2.

Fig. 3 is a transverse sectional. view through Fig. 1 on line 3--3.

Fig. l is a perspective view of a springretaining plate.

Fig. 5 is a fragmentary perspective view oi the screw retainingcasing.

Fig. 6 is a view similar to Fig. 1 showing; a sligl'rtly modified form oi the invention.

Fig. 7 elosin a further modified form of the invention.

Referring to the accompanying drawings b numerals 1 indicates a handle which is provided with a stationary jaw 2 and with. a curved raised. portion or cam 3 struck on an are so as to extend from the stationary jaw 2 to the point t. A screw casing 5 is hinged at 6 on handle 1 and normally straddles the earn 8, there being a stirrup 7 at the bottom. oi? the casing 5 for the spring; 8 whereby the shank 9 on. the movable jaw 10 is held. against the cam. The shank 9 is slidingly titted into passageway 11 of the casing 5 so that the smooth. lower edge will engage the a. view similar to Fi 6, but dis- Specification vfLetvelslatent Patented lll|31523,1920.

Application filed June 525.53, 1918.

Serial No. 242.037.

cam 3 and the toothed upper edge 1: will be in position to engage the threads of the screw 13. These threads are preferably of the buttress type and the teeth 12 are formed so as to conform to the shape of these par ticular threads. An opening lt is provided. in the upper part of the casing 5, said opening being cut away at 15 and 1G for receivin the ends of the plate 17 which plate is hold in place by suitable screws 1.8 and 1.9 projecting through apertures in the plate l7 and into threaded apertures in the casing A pair of guiding lugs 20 and 21 are provided on plate 17 through which the overlapping;- ends of spring 22 are placed when the parts are assembled as shown in Fig. 11. Opening 14.. is provided with runrays or grooves and 2a in which the pin of screw 13 tits whereby said screw may move toward and from the teeth 12 as may be necessary. The shank 9, however. cannot move away from the cam 3 as the teeth would bear against the shoulders 26 and 9.7. The screw 13 may he grasped by the fingers ot' the operaim' and pulled directly away from the teeth 12 so that the shank 9 and aw 10 may be moved back and forth to the desired position and then screw 13 allowed to move under the action of spring 22 back into engagement with the teeth, after this has been done the screw could be rotated for producing a final adjustment it such adjustment is desired.

In operation when the parts have been properly adjusted. to a given article the handle 1 is then moved for rotating the article andwhen moved in one direction will cause the outer end 28 to move toward jaw 10 as the handle rocks the cam 3 whereby the article will be properly gripped during the time power is applied to the wrench. A reverse action of handle 1 will, oi course, more the jaw in an outward direction and pro duce a proper releasingaction. When assembling the parts the screw 13 is first phiced in position with its guiding pin 15 and then spring Qlds placed in position at ter which plate 17 secured in place as shown in Fig. 1, whereupon all the parts are locked. in proper position, but may be readily removed whenever desired.

in Fig. 6 a slightly modified form of the invention is shown in which the casing 5' is connected rigidly to the handle 1 by rivets or other similar fastening means 29. This will prevent an independent making of the handle and allow a slight rocking movement of the shank 9, as said shank loosely fits into passageway 11.

In Fig. 7 a further modified form of the invention is shown in which the handle 1 provided with a flat upper surface 30 against which the smooth flat lower surface of the shank 9 fits, casing 5 and associate parts, however, being the same as in the preferred structure so that no additional description will be necessary. It will be noted, however, that in this figure there is no rocking movement of either the shank S) or the handle 1, though the screw 13, spring 22 and plate 17 are all formed similar to that shown in F l and act in a similar manner for permitting a quick adjustment of shank 9 or a slow adjustment as may be preferred.

What I claim is:

1. -A wrench of the character described comprising a handle provided with a sta 'tionary jaw at one end, a movable jaw coacting with the stationary jaw provided with a shank having threads on the back thereof, said shank extending substantially parallel with said handle, said shank being movable longitudinally of the handle and also rock able so that the jaws may move toward and from each other in a direct line or pivotally, a cam on said handle near said stationary jaw having a smooth surface against which said shank bears and on which said shank rocks, a casing pivotally mounted on the handle and positioned to straddle said handle, said casing acting to hold the shank in position on said cam while allowing a free reciprocatory and rocking motion thereof, said casing having an opening adjacent said shank and a groove on each side of the opening, a screw member positioned in said open ing and normally engaging the teeth on the back of the shank, a journal extending through said screw member with the ends extending into said grooves so as to be guided thereby, and a spring for resiliently holding the screw in engagement with the teeth on the back of said shank.

2, A wrench of the character describec comprising a handle provided with a stationary aw, a movable aw provided with a shank extending substantially parallel with the handle, a casing engaging the handle straddling said shank and part of the handle for guiding the shank in its movement, said shank having teeth on the edge opposite that engaging the handle, said casingrhaving an opening extending from the end opposite that engaging the handle downward until part of the teeth on the shank are exposed, a groove arranged on each side of said open ing, a screw member arranged in said opening for normally engaging said teeth, a pin arranged 1n said screw member having the end positioned in said grooves so as to guide the screw member in a movement toward and from said teeth, a spring acting on said screw member for normally holding the same in engagement with said teeth, and a retaining plate connectcd to the open end of s: id casing forming depending lugs for holding the spring in place.

3. A wrench oi the character described comprising a handle provided with a, stationary jaw on the end, an arc-shaped cam arranged on said handle adjacent said stationary jaw, a shank provided with a movable jaw extending at right angles to the shank, said shank normally extending substantially parallel to said handle and rest ing on said-cam whereby it may rock as well as move longitudinally, said shank having teeth on the edge opposite that engaging the same, said teeth having one face perpendicular to the general direction oi the shank and the other edge at an angle thereto, a casing pivotally mounted on said handle and straddlin said shank, said casing provided with an opening, a screw mcmbcr rotatably and slidably mounted in said opening, said screw member having buttress threads co-acting ith the teeth on said shank, and a spring for resiliently urging said screw member toward said shank, the construction of said buttress threads and said teeth being such that by pressing on the outer end of said movable aw it will close or move toward the stationary jaw, said teeth slipping over the threads oi the screw member.

4. A wrench of the character dcscribml comprising a handle, a stationary jaw counectcd with the handle, a cam arranged on the back of said handle adjacent the stationary jaw, saie cam being arc-shaped, a movable jaw having a shank extending parallel with the handle and positioned to rock on said cam and reciprocate thcreover, said shank having teeth thereon acting as threads, said teeth being on the opposite side to that engaging; said cam, means for holding the shank in position, a screw normally engaging said teeth but capable of movement toward and "from said teeth, and means for normally holding said screw in engagement with the teeth whereby the movable jaw may be adjusted in both directions by said screw and may be moved bodily-toward the stationary jaw by a push on the movable jaw to vard the stationary jaw.

5. A wrench oi the character described comprising a handle provided with a stationary jaw at one end, a movable jaw coacting with the stationary jaw provided with a shank having threads on the back thereof, said shank extending parallel with said handle, said shank being movable longitudinally of handle and also rockable so that the jaws may move toward and from each other in a direct line or pivotally, a cam on said handle near said stationary jaw ill against which said shank bears and on which said shank rocks, a caslng pivotally inoiu'ited on said handle and positloned to straddle said handle and said shank, said casing holding the shank in position on said cam while allowing a tree rr-zciprooatory and rocking movement thereof, a screw bodily movable tnwam a from the threads on said shank, and a spring acting on said screw it'or nrinall causing the same to remain in engagement with said threads, the threads on the screw being buttress threads and the threads on the shank being threads of the same type whereby a push on the movable jaw toward the stationary jaw will bodily move the movable jaw to a closed position.

('1, A wrench comprising a handle provided with a stationary jaw at one end and an arcshaped cam on the back positioned adjacent the jaw, a movable jaw coacting with the stationary jaw and provided with a shank having a rack on the back thereof, said shank extending substantially parallel with said handle, said shank being movable longitudinally oi the handle and rockahle on said cam from. a practically parallel position with said handle until the end of the shank opposite the jaw will approach the handle for increasing the distance between the jaw on the shank and the jaw on the end or? the handle while the extreme end oi? the movable jaw moves away from the fixed jaw. a casing pivotally mounted on the hantile and positioned to straddle said handle and cam, said frame acting to hold said shank in position on said cam while allow ing a tree rocking motion thereof, said casing having an opening adjacent said shank, and a groove on each side of the opening, screw means positioned in said opening and normally engaging the teeth of said rack, journal means extending from said screw means with the ends extending into said grooves so as to be guided thereby, and a spring for holding the screw means in engagement normally with the teeth on said yank. said spring yielding in a direction away from said rack when pressure is brought to bear on the screw means in the same direction whereby the shank is allowed to move -freely in either direction, the threads on said screw means and the teeth. 'd rack being such that by pressing on the outer end of said movable jaw said movable jaw will close toward said stationary jaw, said threads sliding over the teeth on said rack while the screw means will prevent ,the movement of the movable jaw in the opposite direction.

'7. it wrench oi? the character described coniiprising a handle provided with a fixed jaw at one end and an integral arc-shaped cam at the jaw end of the handle, the axis or the cam extending in a direction normal to the side of the handle, a movable jaw slidingly mounted and also rockably mounts ed on said cam, said jaw having a shank provided with butts. ss threads or teeth on the back, a casing straddling the handle near the fixed jaw, means for pivotally awarding the casing on the handle, said means h iing positioned adjacent one edge of the casing, an adjusting member having buttress threads meshing with. said rack, a flat spring acting on aid adjustable member for cruising the threar s to normally remain in engagement with the threads of the rack while being capable of bodily removal therefrom, and a flat spring rigidly secured to said handle and engaging the lower part of said :l'ralne for normally holding the frame in a given position and said shank parallel with said handle.

8. A wrench of the character described comprising ahandle provided with a stationary jaw and a bearing surface, a movable jaw provided with a shank extending substantially parallel with the handle and slidingly and rockably mounted on the hearing surface of said handle, a casing engaging the handle and straddling said shank and part of the handle ilior guiding the shank in its novr-ni'ieut, said shank having teeth on the edge opposite that engaging said bearing surface, an opening adjacent said shank extending downward until part oil. the teeth on the shank are exposed, and a groove on each side of the opening, screw means having luittress threads meshing with the teeth oi? said rack, a spring for normally holding said screw means in operative engagement with said rack, which by compression permits the lifting of the screw means from the 'ack for allowing the shank to pass freely through the casing in either direction, the buttress threads on said screw means and the teeth. on the rack acting in such a manner as to permit the shank and movable aw to be moved so that the movable jaw will approach the stationary jaw when the movable jaw has been pressed. against an object while preventing said movable jaw and shank moving in the opposite direction.

9. A. wrench of the character described comprisiiii a handle formed with a stationary jaw, an arc-shaped cam, a movable jaw provirfled with a shank extending substantially parallel with the handle rockably and slidin mounted. on said can), a casing engaging the handle and straddling said shank and part of the handle for guiding the shank in its movement, said shank having teeth on the edge opposite that engaging the handle,

said casing having an opening opposite said shank extending downwardly until part of the teeth on the shank are exposed, and a groove arranged on each side of said opening, a screw member arranged in said opening for normally engaging said teeth, a

journal memberextending from each end of the screw member into said grooves to guide the screw member toward and from said teeth, a spring acting on the screw member for normally holding the same inengagement with said teeth, said spring projecting into said grooves so as to he guided thereby, a second spring secured to said handle on the opposite side to that carrying said shank, said second spring being positioned to bear against part of said easing for retaining normally both jaws in practically a parallel position. said second spring yielding when said shank is forced to rock on said cam in such a direction as to cause the rear end of said shank to approach more closely said handle, the screw member being held in yielding contact by said lirstanentionml spring whereby the shank may slide in one direction and is prevented from sliding in the opposite direction \\'l1ile being capable of being forced in either direction upon the operation of said spring member.

HARRY LUMPKIN ()SMEN'J.

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