US1546139A - Pliers - Google Patents

Description

Fig.2 Fig.3

July 14, 1925. 1,546,139

R. F. LEVEQUE Pumas Filea Dane 12- 1923 2 Sheets-Sheet 1 Robert Friric LYEmQ July 14, 1925. 1,546,139

R. F. LEvEQuE PLIERS F ed D c. 1923 2 Sheets-Sheet 2 Frdric Lv q Robert NVENTOR:

. By & Attorney 1 July lei, "i925.

nose-er resonate E; or sr-avnnrrn-onsrnns, FRANCE.-

PLInns.

Application filed December 12-, 1. 2. Serial No. 680,071.

all whom it may gmwgml. I v Be 1t known that" onner Fmior'mlo LEVEQY (Iv-115911 01" the French R ncpubl'ic, residing at St-QuentiirOestres, fusne, in the 5 French Republic, have invented new and the piece clamped.

useful Improvements in or Relating to Flier". ot wl'iich the following is a specification.

The present invention has for its object pliers tor cl mping purposes, one feature whereof resides in that one oi the two :hes of the pliers, each of which con- 1 rites a jaw one end, and which are hinged upon each other at the other end, carries toothed sector whilst the other branch carried an axle-pin around which is pivoted a lever provided with a tooth, or portion of a pinion, adapted to engage the said toothed sector. 7

Such pliers offer numerous advantages: the branches cannot be spaced apart at a toe at distance so that the pliers may be held very easily in the hanu whatever may be the spacing between the jaws. Further, the jaws, even for large openings, make a sufiicient-ly small angle so that the clamping is always straight i. e. at right angles with @nthe other hand, the cla-mpii'ig may be very strong and is substantially the same from the innermostpart ol' the aws to the e ds of the same, which ail'ords the use of long jaws without it being prejudicial to the force of the; pliers. FurtllQ'Z. these pliers can be very simply manufactinen and machined, and comprise a very limited number of pieces.

in the accompanying drawing which shows by way of example various forms of p .ation of the inve'ntionz' mg, 1 is a front view of the pliers in a mean positionof opening, the clamping lever being shown in the position which permits of selecting the teeth 01 the sector which are to be engagedwith those of the pinion.

Fig. 2 is a sect-ionon the line Ae-A (Fig.1). f i

Fig. 3 shows the pliers in the position of aximum closing.

Fig. e shows the posi the time when one is about to'proceed with the clamping of-an object, the position of maximum approaching of the two jaws being shown in full and dotted lines.

Figs. and 6 are respectively views similar to Figs. 2 and 3 ot a modified form of pliers according to the invention.

by the use of tion of the pliers at Figs. 7 and 8 are front views of the corresponding ends of the branches of the modification shownin Figs. 5 and 6,. j 1

Figs. 9' and 10 are respectively front view and a side view of the washer withits stud constituting the fulcrum for the two branches.

In the constructions illustrated in Figs. 1 to a the'pliers comprise two branches 1" and 2 hinged at? at one end andforming jaws at the other and at 1* and 2. The branch 1 carries a circular toothed sector thaving its centre at 3. The branch 2 carries an axlepin 5, about which a lever. 6 is pivoted, said h lei' erserving. as a handle andprovided with the teeth 7 capable of being engaged with those of the toothed sector a, the portion of a pinion formed by these teeth having the aide-pin 5 as its centre.

To hold the jaws ina correct position with respect to each other, a flange 8 is preterably made integral with the branch 2 for guiding the sector 4. The jaws may be pro vided with recesses on their inner face for the clamping of round pieces; they may be also provided with cutting portions.

In the position in which the lever 6 is raised (Fig. 1), the opening of the pliers maybe easily adjusted. When the branches are in the desired position (Fig. 4L) the lever 6 is bronght towards the branch 1 by hand pressure, the teeth 7 now engage the teeth ofthe sector 4 corresponding .to the same, and the jaws 1 and 2 come to'gether(posit-ion shown in miXed'lines' in Fig. 4). The

clamping effected is much increased in ratio,

due to the gear ratio between the pinion ortion 7 and the sector l, and to the ratio between the two parts of. the lever 6 on either side of the pin 5. 7

The pliers according to the invention may be easily hand-led although the fulcrum of the jaws is at a relatively. great distance from the object to be clamped, and the clamping, ot the jaws is effected very near the object to be clamped, this being afforded the lever 6. This lever can be engaged at will and inthe direction of the clamping, and its maximum outward position is independent of the spacing of the jaws.

Moreover even for wide openings, the angle between the jaws remains small, and this allows of seizing thick pieces in a practically straight position. The extreme outward position of the lever 6, being independ;

Qil

cut of the spacing of the jaws, may be just what is necessary to that pliers may be conveniently held in hand. The ratio of the eiiort on the jaws to the eiiort to be exerted on the lever may be made very high While at the same time keeping to the usual di mensions for the pliers, and by reason of the great distance of the jaws from their fulcrum, the clamping remains very strong even at the outer ends of the jaws.

In the modification shown in Figs. 5 to the branches 1 and 2 are straight instead of being curved as in Figs. 1 to 4, which reduces the bulk of the pliers. I

The lower ends of the branches 1 and 2 are flattened and pivoted about a pin 10 at one end whereof is riveted a washer 11 (Figs. 9 and 10) carrying a stud 12 engaged in notches 13 and 14: provided respec tively in the flat ends of the branches 1 and 2. The notch 13 has a width equal to that of said stud 12, while the notch 1% is wider, which permits the branches of rotating with regard to each other but limits this rotation, consequently limiting the opening of the pliers so that the widest opening corresponds to the length of the sector 4.

In this modification the flange 15 carried by the branch 2 and serving as a guide for the sector 4 is also used for holding the axle pin, or screw 5.

Further the end 6 of the lever made as a turn-screw.

Various constructional modifications may be brought to the pliers described without departing from the scope of the invention. In particular, the number of teeth 7 of the pinion portion can be as desired, and may be reduced to one.

A stop-piece may also be provided at the end of the sector 4 for preventing the opening of the pliers beyond the limit determined bythe length of the said sector.

Having now described my invention What I claim as new and desire to secure by Letters Patent is:

1. Pliers comprising two branches constituting jaws at one end hinged upon each other at their other ends and disposed over their whole length on the same side, relatively to each other, a curved tooth sector carried by one of the branches and concentric with the pivot axis of said branches, a pivot pin carried by the other branch, a lever pivoted upon said pivot pin, a portion of pinion provided on said lever and adapted to mesh with the curved toothed sector,

6 may be said toothed sector and said portion of pintuting jaws at one end'hinged upon each other at their other ends and disposed over their whole length on thesame side, rela tively to each other, a curved tooth sector carried by one of the branches and concentric with the pivot axis of said branches, a pivot pin carried by the other branch, a lever pivoted upon said pivot pin, a portion of pinion provided on said lever and adapted to mesh with the curved toothed sector, said toothed sector and said portion of pinion constituting an internal gear, and a flange provided on said pivot pin carrying branch and projecting over said'toothed sector, thus serving as a guide for the'latter.

3. Pliers comprising two branches constituting jaws at one end hinged upon each other at their other ends and disposed over their length on the same side, relatively to each other, a curved tooth sector carried by one of the branches and concentric with the pivot axis of said branches, a pivot pin carried by the other branch, a lever pivoted upon said pivot pin, a portion of pinion provided on said lever and adapted to mesh with the curved toothed sector, said toothed sector and said portion of pinion constituting an internal gear, and a flange provided on said pivot pin carrying branch and projecting over said toothed sector, thus serving as a guide for the latter, said pivot pin extending through and being supported by said flange.

4. Pliers comprising two branches constituting jaws at one end, hinged upon each other at their other ends around a pivot axis and adapted to remove from each other at any desired angle, a notch provided in said other end of each of said branches, the notch in one branch being of greater width than that of the other branch, a. washer secured at one end of said axle-pin and carrying a stud extending through said notches, a toothed sector carried by one of said branches, a pivot pin carried by the other branch, a lever pivoted about said pivot pin, a portion of pinion provided on said lever and adapted to mesh with the curved toothed sector, said toothed sector and said portion of pinion constituting an internal gear.

In testimony whereof I have signed my name to this specification.

ROBERT rnnnnn o' LEvnoU

Images