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Publication numberUS572857 A
Publication typeGrant
Publication dateDec 8, 1896
Filing dateJan 9, 1896
Publication numberUS 572857 A, US 572857A, US-A-572857, US572857 A, US572857A
InventorsLuther H. Barnes
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 572857 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)


(No Mbde'l.)

No. 572,867. Patented Dec. 8, 1896.

Imam 2'02 WITNESSES renches; and I do hereby declare the folskilled in the art to which it appertains to UNIT D STATES,




SPECIFICATION forming part of Letters Patent No. 572,857, dated December .8, 1896.

Application filed. January 9, 1 8 9 6.

T0 at whom it may concern.-

Be it known that I, LUTHER H. BARNES, a citizen of the United States of America, residing at Nemaha City, in the county of Nemaha and State of Nebraska, have invented certain new and useful Improvements in lowing to be a full, clear, and exact description of the invention,such as will enable others make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The object of my invention is to provide a simple and effective wrench for turning nuts, screw-taps, and the like; and it consists in the combination of a ratchet-wheel having a central opening to receive the nut and an annular groove on each side, a handle reduced at one end to form a fixed pawl for engagement with the teeth of the wheel, and plates pivoted to the handle and provided with inwardly-bent ends which engage the annular grooves, the movement of the plates being limited by a cross-bar and shoulders formed on the handle,all as hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure 1 is a perspective view of a wrench constructed in accordance with my invention. Fig. 2 is a sectional View on the line 2 2 of Fig. 1. Fig. 3 is a sectional view on the line 3 3 of Fig. 1. Fig. 4 is a detail perspective view of a reducer which is adapted to be placed in the opening for the nut to provide a smaller opening.

A designates the handle of the wrench, which is made up of a bar of metal reduced at one end to provide an inclined edge CL, which terminates in a point or fixed pawl. Each, side of this handle is formed with a shoulder a, and adjacent to these shoulders are pivoted plates 13, connected to each other beyond the inclined edge a of the handle by means of across-bar b, said cross-bar limiting the swinging movement of the plates in one direction. The outer ends of the plates B are bent inward for the purpose herein after set forth.

0 designates a ratchet wheel or disk which is provided centrally with a nut-receiving Serial No. 574,923. (No model.) i

1 opening 0 of suitable configuration, and on each side of said disk is an annular recess or groove 0', with which engage the bent ends of the plates B, carried by the handle. The width of the annular recesses is slightly greater than the thickness of the ends of the plates, so that when the longitudinal center of said plates is practically on a line with the axis of the ratchet-disk said disk can turn freely, but when the longitudinal center of the plates is to one side of the axis of the disk the bent ends of said plates will impinge against the walls of the annular recesses and bite or clamp against the same to prevent the ratchet-wheel turning. This construction is an essential novel feature in the improvement in wrenches of this type. the plates is limited in one direction by the cross-bar l), as hereinbefore mentioned, and the opposite movement is limited by the shoulders a on the handle.

In connection with the wrench constructed in accordance with my invention I may use a reducer, (shown in Fig. 4,) which is adapted to fit within the central opening of the ratchetwheel, said reducer being used for manipulating nuts which are smaller than the openings in the ratchet-wheel.

In use it will be found that the plates which connect the ratchet-wheel to the handle will prevent the ratchet-wheel swinging away to any great extent, the movement being only sufficient to allow the end or pawl to move into and out of engagement with the teeth. When the cross-bar engages the inclined edge a of the handle, the bent ends of the plates will bite against the sides of the annular recesses, the movement tightening the ratchetwheel on the nut, and the end of the handle is then brought in engagement with the next tooth and the nut tightened. WVhen this is being done, there is a direct pull upon the plates and a pushing movement on the pawl, which causes the ratchet-wheel to turn.

I am aware that prior to my invention it has been proposed to construct nut-wrenches comprising a ratchet-wheel having a nut-receiving opening or socket and annular recesses, the handlebar being of such construction as to provide lugs for engagement with the annular recesses, said handle-bar carrying a shoe or pawl that engages the ratchet-wheel,

The movement of and I therefore do not claim such as my invention but What I do claim as new, and desire to secure by Letters Patent, is-

1. In a wrench, the combination, of a handle-bar having one end reduced to form a pawl, plates pivoted to the handle-bar and provided with inward ly-bent ends, means for limiting the swinging movement of the plates upon the handle-bar together with a ratchetwheel having a central opening or socket and bent ends of the pivoted plates engage, substantially as shown and for the purpose set forth.

2. The combination in a wrench, of a handle-bar A having a reduced end to form a pawl, a shoulder a formed on each side of the .wheel 0 having a central nut-receiving opening and an intermediate annular recess on each side, the bent ends of the plates B being in engagement with said annular recesses,

substantially as shown and for the purpose 7 set forth. intermediate annular recesses with which the. v

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

LUTHER H.- BARNES. Witnesses:

EM. ANEY, H. W. MUs'rERs-

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2486700 *Jan 9, 1946Nov 1, 1949Barlow Howard FPivoted pawl ratchet wrench with quickly-detachable handle
US2508604 *Mar 31, 1945May 23, 1950Greer John JRatchet wrench
US4909106 *Jan 11, 1989Mar 20, 1990Foreman William ERatchet wrench
US5290171 *Dec 17, 1992Mar 1, 1994Fereidoun DaftaryUniversal carrier for carrying various anatomical dental restorative components
Cooperative ClassificationB25B13/463