US545323A - Pipe-wrench - Google Patents

Description

(No Model.)

J. E. WAKEFIELD.

PIPE WRENCH.

Patnted Aug. 27, 1895.

uuculoz yd W5 sma wea 19i PM cameo UNITED STATES PATENT JOHN E. WAKEFIELD, OF VVORGESTER, MASSACHUSETTS.

PIPE-WRENCH;

SPECIFICATION forming part of Letters Patent No. 545,323, dated August 27, 1895 Application filed April 1, 1839.

To all whom it may concern:

Be it known that 1, JOHN E. WAKEFIELD, a citizen of the United States, and a resident of Worcester, in the county of Worcester and State of 'Massachusettshave invented a new and useful Improvement in Piperenches, of which the following is a specification, accompanied-by drawings which represent a pipe-wrench embodying my invention, and in which 4 Figure 1 represents a side view of a pipewrench, a portion of the handles having been omitted; Fig. 2 is an edge view of the portion of the wrench shown in Fig.1. Fig. 3 represents a side view with a portion shown in sectional view in order to better disclose the operating parts of the wrench. Fig. 4Jis aside view, the movable jaw and a portion of the fixed jaw being shown in central vertical sectional view. Fig. 5 is a transverse sectional view on line Y Y, Fig. 1. Fig. 6 represents one of the toothed plates forming'a portion of the jaws; and Fig. 7 is a sectional view of the portion of the operating parts of the wrench shownin sectional view in Fig.3, but in the position assumed when the movable jaw and operating-lever are to be moved along the fixed bar for the purpose of adj nstng the space between the fixed and movable aws to adapt the wrench to difierent sizes of pipe.

Similar letters refer to similar parts in the difierent figures.

Referring to the accompanying drawings, A denotes the bar; B, the fixed jaw, in the present instance integral therewith; C, the movable jaw sliding upon the bar A and provlded with a screw-threaded socket O anda box C inclosing the bar A. Within the screw-threaded socket C, I place the screwthreaded bolt D, forming an arm extending from the sliding jaw downward parallel with the bar A, and to this arm is pivoted the link E by a pivot a. The link E consists of a strap inclosing three sides of the rectangular'end of the screw-threaded belt or arm D and having the wings E E extending over the bar A.

F denotes the lever-handle, provided at its upper end with the wings F F, inclosing the sides of the bar A. The wing F and the wing E of the link E are pivoted together Serial No.305,525. (No model.)

by a screw-b, and the wing F and the wing E are similarly pivoted together by the screw b, with the axesof both pivots coincident. The lever-handle F is also pivoted by the pin 0 to a saddle G, which is provided with the teeth d, adapted, to engage the teeth e upon the rear edge of the bar A. Between the bolt or arm D and the link E, I place a blade-spring ll, attached to the link atf, with its free end 9 resting against the front side of the rectangular bolt or arm D, with its tension applied to press the point it of the link in the direction of the arrow 1, rotating the link E on its pivot a and holding the saddle Gagainst the side of the bar A, with its teeth engaging the teeth upon the barin the position shown in Fig. 3 of the drawings. If pressure he applied to the handle F in the direction of the arrow 2, the handle will turn upon the pivot c, and the wings F and F acting as the short arm of a bell-crank lever, will raise the link'E and attached moveable jaw C, sliding it along the bar Atoward the fixed jaw B, the saddle G being held from slipping along the bar A by means of the teeth 01 and e. A limited sliding motion is thus imparted to the movable jaw B toward the fixed jaw sufficient to seize the pipe to be held. If it is required to adjust the movable jaw for pipe of a different size, the handle F is moved away from the bar A in the direction of the arrow 3, the upper edges of the wings F and F are brought against the lower side of the box 0 forming afulcrum at j, lifting the saddle G, and as the wings F and F form the short arm of a belhcrank lever between the point j and the pivots b b the upper end of the link E will be carried in the direction of the arrow 4, rocking the link E slightly on its pivot a and compressing the spring H, the parts assuming the position shown in Fig. 7, with the teeth cl of the saddle G entirely disconnected from the teeth e of the bar A, allowing the movable jaw 0, together with its connected link E and handle F, to beymoved along the bar A, thereby increasing or decreasing the distance between the jaws B and C, as desired. When the movable jaw has been adjusted on the bar, as described, and the handle F has been released, the tension of the spring ll. will serve to return the link E and connected handle F to their normal position, as shown in Fig. 3,

bringing the saddle G against the bar A, with its teeth 01 engaging the teeth e of the bar. Within the wings F and and attached to the handle F is a spring 70, with its free end bearing against the end n of the saddle G in order to hold the end 19 of the saddle against the handle, as shown in Fig. 7, so as to maintain the toothed edge of the saddle substantially parallel with the toothed edge of the bar A as the saddle is being raised from contact with the bar A.

In the operation of disconnecting the saddle G from the bar A, as described, I bring the lower side of the box 0 in close proximitytd able jaw 0 upon the screwdhreaded bolt D either a complete revolution or a multiple of a revolution. When the bar A is stripped by the removal of the jaw O and its connected parts, the plates J J can be removed and others inserted in their place, if desired. The plates J J, as shown in the accompanying drawings, are steel' plates provided with ratchet-teeth J J pointing, in opposite directions. The plates have rectangular inortises J fitting the contour of the bar A, and they are attached "to their respective jaws B and G by the screws J J". The fineness and shape of the teeth J J are adaptednto the special work to be done, and in case other shaped teeth or even jaws of other shapes than that shown are required the plates J J are readily removed and others substituted. The plates can be hardened separately from the jaws and in case they are broken or worn by use they can easily be replaced.

What I claim as my invention, and desire to secureby Letters Patent, is

1. The combination with a bar having a fixed head and provided with teeth, of a saddle engaging the teeth on said bar, a sliding jaw sliding on said bar, an arm carried by said sliding jaw and parallel with said bar, said arm being adjustable in length, substantially as described, a lever handle pivoted on said saddle and a link connection between said lever handle and said arm, substantially as'described.

2. A bar having a fixed head and provided with teeth, a sliding jaw sliding on said bar and provided with a screw-threaded socket, a screw-th readed bolt entering said socket and extending parallel with said bar and forming an adj ustable arm, a saddle engaging the tool h on said bar anda lever handle pivoted on said saddle and operatively connected with saidadjustable arm by a link connection, substan tially as described.

3. The combination of a bar having a fixed head and provided with teeth, a saddle engaging said teeth, a leverhandle pivoted on said saddle, a jaw sliding on said bar, a pivoted link connecting said jaw and said lever handle and capable of an angular movement, by which said saddle is lifted out of engagement with said toothed bar and a spring held by saidlever handle and having its tension applied to said saddle to rock it upon its pivot and hold its surface parallel with the toothed surface of said bar, substantially as described.

,4 JOHN E. \VAKEFIELD.

Witnesses:

RUFUS B. FOWLER, ll. M. FOWLER.

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