US251635A

US251635A - Wrench

Info

Publication number: US251635A
Authority: US
Publication date: 1881-12-27
Anticipated expiration: 1898-12-27

Description

(No Model.)

H. W. REED.

WRENGH. No. 251,635. Patented Dec. 27,1881.

ATTORNEYS.

nnnnnnnnnnnnnnnnnnnn nnnnnnnnnnn nnnnn c UNITE STATES PATENT OFFICE.

HERBERT REED, E. WARE, MAssAo UsETTs.

WRENCH.

SPECIFICATION forming part of Letters Patent N 0. 251,635, dated December 27, 1881.

. Application filed September 15, 1881. (No morleL) I To all whom it may concern Be it known that I, HERBERT W. REED, of

Ware, Hampshire county, Massachusetts,

have'invented anew and useful Improvement in Wrenches, of which the following is a specification.

' The object of my invention is to provide for rapilcg and close adjustment of wrenches to the wor My invention is an improvement in the class of so-called monkey-wrenches whose slidiugjaw is combined with arack-bar and paw], and also an adjusting-nut to adapt it for rapid and close adjustment to the work.

r5 In the drawings, Figure l is a side elevation,

partially sectional, of a wrench containing my invention. Fig.2isa crosssection of the same on line was of Fig. 1, and Fig. 3 shows the rackbar separate in side and face view. Similar letters of reference indicate correspondin g parts. 7

'A is the shank of the wrench, having fixed jaw a and fitted with handle I).

c'is the slidingjaw on shank A.

d is a worm or screw fitted in a recessof jaw c on pivots, so as to turn freely.

e is a strip or bar lying against one side of the shank and extending through the aperture of jaw c, where the bar 6 is'formed as a rack 0. for engaging'the screw d. The bar 0 also extends in a recess formed in handle I), and at that portion of its surface is formed with ratchet-teeth.

fis a pawl or thumlr-lever pivoted in handle 5 b and engaging the ratchet-teeth of the bar 6.

With this construction the bar 0, being engaged by the screw, willmove with the sliding jaw on theshank, so that by raising the pawl f the jaw can be moved back'and forth as may 0' be required. The jaw is also moved independently by turning the screw, so that a close adjustment to the work can be made.

i The wrench shown is ofdurable construction and not liable to derangement.

I am aware a patent-has been granted for a wrench of this class in which the sliding jaw can be adjusted forward or up to the work by turningalhollow nut arranged on the inner end of the handle. The following statement indicates the chief differences between this invention and my own: In such patented wrench' the sliding jaw and rack-bar are not connected so as to be moved back together, but the rackbar must be adjusted back independently by means of the nut, which obviously prevents so rapid work as with my wrench. The rackbar likewise projects into the space between the jaws when the sliding jaw is moved far back to admit large work. The shank ofthe wrench requires to be grooved lengthwise to receive the rack-bar, which construction increases the cost and clumsiness of the implement. In my wrench the same hand thatgrasps the handle also conveniently manipulates the pawl that holds the rack-bar, and while the implement is held in therequired position the other hand moves the sliding jaw and rack-bar together and then adjusts the jaw to the work. I am enabled to utilize a common t'ornrot' nut-for adjusting the sliding aw, which is an economy in manufacture of the implement. t

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The combination, with the shank, fixed jaw, andhandle, ofthe slidingjaw, the nut attached to the latter, the rack-bar with which said nut engages, and a pawl pivoted to the handle, all as shown and described, whereby the rack-bar may be moved in either direction with the sliding jaw and the latter be adjusted independ ently thereofin either direction by turning the out, as specified.

HERBERT WARREN REED.

Witnesses: CHARLES H. TRENCH, ALMARAN E. OooPER.