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Publication numberUS723356 A
Publication typeGrant
Publication dateMar 24, 1903
Filing dateOct 1, 1902
Priority dateOct 1, 1902
Publication numberUS 723356 A, US 723356A, US-A-723356, US723356 A, US723356A
InventorsWilliam J Bayrer
Original AssigneeWilliam J Bayrer
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 723356 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

, No. 723,356. I I I PATENTED MAR.-24, 1903,




31 ,HI 'W 1 H0 MODEL.





SPECIFICATION forming part of Letters Patent No. 723,356, dated March 24, 1903.

Application filed October 1. 1902'.

To all whom it may concern.

Be it known that I, WILLIAM J; BAYRER, a citizen of the United States,residing at Plantsville, in the countyof Hartford and State of Connecticut, have invented certain new and useful Improvements in Nip'pers, of which the following is a specification.

This invention relates to the construction of a joint for a nipper, plier, punch, or the like tool. I

The object of this invention is to provide a joint for such a tool which is simple and cheap to manufacture and strong and durable in use. Tools of this nature have been constructed with a boxjoint-,-that is, one part having a milled opening and the other part extending through the opening; but such a construction is expensive to manufacture. These tools have been constructed with a halved j0int-that is, each part having onehalf cut away and the two halved sections laid together and held by a pivot. Such a construction is cheap to manufacture; but the twisting strains when in use come upon the ends of the pivot and cause the joint to work loose, thus destroying the efficiency of the tool. This joint is particularly unserviceable for nippers with cutting-blades on one side. Tools of this character have also been constructed with halved sections that are held together by linksthat is, by two pivots connected by plates; but such a construction does not form a strong box-joint.

The present invention resides in a tool having the levers halved together, each being shaped like the other and formed by a simple drop-forging process and held together between plates in such manner as to form a strong box-joint.

This invention is illustrated by the accompanying drawings, in which- Figure 1 shows a pair of wire-cutting pliers having the improved joint with one of the side plates removed. Fig. 2 shows an edge view of these pliers. Fig. 3 shows a pair of nippers having the improved joint. Fig. 4 shows an edge View of the nippers. Fig. 5 shows a pair-of pincers that embody the invention. Fig. 6 shows a belt-punch that embodies the invention, and Fig. 7 shows another pair of nippers.

The levers of these tools may have handles Serial 110125578. mamas.

1 of any shape, and the jaws 2 may be formed to hold or cut wire, as shown in Fig. 1, to cut wire, as shown in Fig. 3, to hold wire, as shown in Fig. 5, or to punch leather or paper, as shown in Fig. 6. These levers, which are similarly shaped, are preferably drop-forged, and each is reduced in thickness at the jointsection, so that when assembled they will be halved together; A plate 3 is placed outside each of the sections of the two parts which are halved together. Each of these plates, which correspond with each other, has a perforation thatregisters with the pivot-perforation through the lever parts, and the pivot 4 extends through the level-parts and the plates and is headed over at its ends on the outside of the plates, so as to hold all of these parts together. The pivot may be shouldered at each end, so that when the ends are headed over the plates will not bind the two intermediate parts together. The pivot-opening through the lever parts that are halved together may be located at any desired position-that is, it may be in line with the opening between the jaws, as shown in Figs. 1, 5, and 6, or it may be to one side of the line of opening between the jaws, as shown in Figs. 3 and 7. The levers hinge'on this single pivot-pin t when the handles are opened and closed for working the jaws. Anotherpin 5 extends from one plate to the other. This pin is preferably shouldered, so that when its ends are headed over the plates will beheld fast without bindingtheintermediatepartstogether. Thispin 5 may be, asillustratedin Fig. 1, passed from one plate to the other through the end of one of the handle parts. When arranged in this manner, the plates become fixed to one of the handle parts and the other handle part only swings on the pivot. In the form shown in Fig. 3 the plate-pin 5 is located at one side, so as to pass through but one of the handle parts. In the form shownvin Fig; 5 the plateholding pin is arranged at the center between the ends of the handles, so that both handles are free to oscillate on the pivot-pin. In'this form the plates are not fixed to either part. In the form shown in Fig. 6 the plate-pin is located near the center and the lever parts are slotted, so that the handles may be oscillated to open and close the jaws. In the form shown in Fig. 1 two plate-holding pins 5 and 6 are used. In this case the plates are fixed to one of the lever parts. In the form shown in Fig. 7 two plate-pins 5 and 7 are illustrated, slots being made in the lever parts for the passage of these pins. In all cases there is but one pivot-pin, the other pin being simply to hold the plate in such manner as to form a box-joint over the halved parts. The plates are in no sense links, and the plate-holding pins do not act as pivots. At least one plateholding pin should be a considerable distance farther from the jaws than the pivot-pin. This construction allows the lever parts, with the handles and jaws, to be made alike and to be formed to final shape by a simple dropforging process, and yet when these halved parts are put together and fastened by the plates and the pins, as illustrated, a strong box-joint is formed which will prevent any twisting or straining of the parts when they as are used to grip or cut a piece of metal at one side of the middle of the jaws,

I claim as my invention A nipper consisting of two'levers each having a handle and an integral jaw, the said le- 25 plate on each side, and a pin located farther 30 from the jaws than the pivot-pin and passing through the plate on each side for holding the plates together, substantially as specified.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2611288 *Jan 27, 1950Sep 23, 1952Max SchiffbauerMesh joint for pliers and like instruments
US2948962 *Dec 24, 1958Aug 16, 1960Champion De Arment Tool CompanPliers
US3776071 *Aug 20, 1971Dec 4, 1973Krampe JPlier
US7464578Apr 5, 2006Dec 16, 2008Fci Americas Technology, Inc.Hand-held, portable, battery-powered hydraulic tool
US7845255 *Apr 7, 2006Dec 7, 2010Knipex-Werk C. Gustav Putsch KgPliers
US20060272381 *Apr 5, 2006Dec 7, 2006Fci Americas Technology, Inc.Hand-held, portable, battery-powered hydraulic tool
US20090049960 *Apr 7, 2006Feb 26, 2009Andreas HeinsohnPliers
US20160023361 *Jul 25, 2014Jan 28, 2016Cheng-Chang TsaiCutter
DE19737129A1 *Aug 26, 1997Mar 11, 1999Liou Mou TangPliers, e.g. flat nose pliers, electronic pliers, etc.
DE19737129C2 *Aug 26, 1997Jun 13, 2001Liou Mou TangZange
Cooperative ClassificationB25B7/08