US1305571A - Automatic all y-ad just able wrench - Google Patents

Description

A. SPRUP. AUTOMATICALLY ADJUSTABLE WRENCH. APPucATloN mio APR.11,19|8.

katened June 3, 1919.

" paran? ANDREW srormr, or EUREKA, CALIFORNIA.

AUTOMATICALLY-ADJUSTABLE VVRENC-I.`

Specification of Letters Patent.

- Patented une 3, 1919.

Application filed April 11, 1918. Serial No. 227,938.

To all Lo/tom it may concern:

. Be it known that I, ANDREW SPORUP, a citizen of the United States, residing at ltlureka, in the county of Humboldt and State of California, have invented certainnew and useful Improvements in Automati cally-Adjustable Vrenches; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to kwhich it appertains to make and use the same.

This invention relates to wrenches and it relates more particularly to an automatically adjustable wrench for turning either cylindrical or prismatic bodies.

One of the objects of this invention is to provide a wrench which is equally eflicient as v a nut wrench and as a pipe wrench;

which the jaws remain approximately parat;

lel in every adjusted position;

Another object is to provide a wrench of this character which is convenient to manipulate for opening and closing;

Another object is to provide a wrench of this character which is strong, durable and compact; and- Another object is to provide'a wrench of this character which is composed of few and simple parts and may be manufactured at a comparatively slight cost.

Other objects and advantages may become apparent to persons who read the following details of description in connection with the accompanying drawings, in which:

Figure 1 is a side elevation of my improved wrench;

Fig. 2 is a similar view, except that one of the connecting plates or links is removable.

Fig. 3 is a top plan view of the wrench,

Fig. 4L is a view disclosing a portion of the wrench having the jaws in a, partially closed position and in engagement with a cylindrical object; and- F ig. 5 is a transverse sectional View along the line ,-of Fig. 2.

Referring to the drawings in detail in which similar reference characters correspond with similar parts throughout the several views, the wrench consists of separable members or elements 6, 7, 8, 9, 10, 11 and 12. The element G constitutes the major element and consists of a handle 13, a jaw 14 and a cam 15, this member being apertured at the base of the cam 15, as indicated at 16.

The minor element 7 consists of a jaw 17, a manipulative element or thumb-piece 18 and a convexed element or abutment 19. The cam 15 terminates in a concaved portion which receives the abutment 19 and constitutes a complemental abutment which cooperates with the pin, stud or abutment 10 for limiting movement of the major and minor members with relation to one another, as will hereinafter become apparent.

Each of the plat-es or links S and 9 has a slot or aperture 2O therethrough, and the studs or ends of pin 10 extend through the apertures 20 and abut against the plates at the upper ends of these apertures so as to limit movement of the member 7 with relation to the links 8 and 9, and it will be seen that the pin 10 thus coperates with the abutment 19 for limiting movement of the member 7, while keeping the latter constantly parallel with the jaws 14. However, when the member 7 approaches the jaw 14 while the abutment 19 slides along the cam 15, the points or free ends of the jaws move toward one another somewhat faster than the remaining portions of jaws move and, therefore, although the jaws remain in an approximately parallel relation, they converge somewhat toward their free ends, thereby providing the maximum holding eiliciency.

In order that the maximum convenience may be obtained in opening and closing the jaws, I provide one or both of the plates 8 and 9 with manipulative elements 21 and 22. The manipulative element 21 projects beyond the manipulative element 18 in the direction of the free end of the jaw 17, thereby providing a very convenient means for swinging the plates backward by means of a thumb, or linger until the cam l5 has raised the manipulative element 18 sufficiently to*- become. operative for. completing the rear'- ward movement, that is, the movement.V

whereby the jaws are opened.,. The manipulative element 22 is also convenient f or opening the jaws; this element being dis posed conveniently for operation by a thumb or linger when using. b

The plates 8 and 9,being relatively broad,

serve to hold the members 6 andf'l inproper.;

holdingv them in coperativerelation for:

engagingI an object" to be turned, iand oppo-` sitely extendingy studs onsaid minor: mem

ber adapted to move againstl one of; said links so `as to limitmovementfof saidfminorf member with relation to said links.`

2. In a wrench, a major member consist"- ing ofv a handle and a1jaW andia cam and having an aperture therethrough at: the base of-'said-cam, aiminor elementcompris- Y ing a jawl and a manipulative element andf having an aperturetherethrough, a pair-'of` and pivots4 extending apertured links, throughv saidV links and through the` aper- Gopies ofthisv patentmaybe obtained forw cents eachyby addressing; theV G'ommssonerrofj Patents,

tures of said major and minor members to movably secure these members together in such relation thata partof saidminormembercail move on said cam when said' manipulative. elementv is..Y properly manipulated, said cam being of the proper shape to keep the jawv of said: minor member approximately parallel with the jaw of said major member ineach of the working positions of the jaws.

3. Ina-wrench, a major member consist ing of a handle and a jaw and a cam and having an aperture therethrough at the base of saidcam,` am-inorelement comprising a jaw and a-.manipnlative-element and having an: aperturetherethrough, a; pair.V of apertured4 links, providedY with 1 a` manipulative elementy and'. pivots extending through'y said linksfandathrough fthe'apertures of said major; andminor memberstormovablyl secure these members in such relationthat a partof said minor member cany move on said cam whenethe irst said manlpulatlve'eles ment:` 1s properly mampulated, said'cam being." of? the proper-1' shape to 2 keep the; jaw of said minor Ymember .approximately parallel` with the jaw of saidimajorfmemberrin: each of; the working' positions ofiY the jaws,f. the

manipulative.v element of.' said: links: being; operable tov move the 'first `said@manipulative-v element intopositiongfor its effective/.manipulation.A f

In testimony 'whereof I- have hereunto set` my hand in the presence ofztwoasubscribing lVitnesses:

PinncnI-I RYAN, A. L. PENNELL.-

Washington, D. C.

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