US491231A

US491231A - The-main

Info

Publication number: US491231A
Authority: US
Publication date: 1893-02-07
Anticipated expiration: 1910-02-07

Description

(No Medal.)

P. L. VONHAUS 81: H. BECKER.

PARALLEL PLIBRS.

Patented Feb. 7, 1893.

%W e M UNrrnD STATES FRIEDRICH LORENZ VONIIAUS AND HEINRICH BECKER, OF FRANKFORT-ON- THE-MAIN, GERMANY, ASSIGNORS TO SPOHR do KRAMER, OF SAME PLACE.

PARALLEL PLlERS.

SPECIFICATION forming part of Letters Patent No. 491,231, dated February 7, 1893.

Application filed November 7,1892. Serial No. 451,262. (No model.)

To aZZ whom it may concern: one another by a cross joint that the grasp Be it known that we, FRIEDRICH LORENZ of the jaws is equal to that of the legs. The VONHAUS and HEINRICH BECKER, subjects of amount of leverage is thus altogether in the the German Emperor, and residents ofFrankhands of the maker since it can be made as fort-on-the-lllain, Germany, (assignors to the great as desired according to the purpose for 5 5 firm of SPOHB d: KRAMER, in the said city of which the pinchers are intended. Herein lies Frankfort-on-the-Main,) have invented new a very special advantage of the new form of and useful Improvements in Parallel Pliers, pinchers since they can be constructed vas Nippers, and theLike,of which the following wire pliers, as well as for gripping or seizing,

1c is a specification. while the old form of pinchers could only be 60 This invention relates to an improvement used for wire since as has alreadybeen menin pinchers, pliers, nippers and the like and tioned, the amount of leverage and therefore consists in making the two legs of such tools the force which could be exercised by means in one piece with the jaws thereof, such jaws of the pinchers was confined within narrow being kept parallelin everyposition by means limits. On the other hand the new pinchers 65 of a special crossjointapplied tothe legs. In can easily bemade so strong that they will all forms of parallel pinchers atpresont in even serve to cut fairly thick rods of iron or existence the parallel motion of the jaws is other metal such as rivets, screws, Soc. The effected by the legs of the pinchers, by the new pinchers mayalso be used with the same method of making the legs of shaped metal advantage as shears for cutting sheet metal, 70 or of curved plate and super-posing the one for which purpose only a very simple alteranpon the other as in scissors, the specially tion in the form of the jaws is required. constructed jaws being then guided parallel Moreover, in the new pinchers the objectionby rods or slots. This method of construction able shifting of the parts of the jaws relative a5 has however several disadvantages. In the to each other is obviated, since the legs of the 7 5 first place the parallel motion is confined to pinohers, and also the jaws are firmly conthe jaws and the legs do not share in it. It nected together and only move toward or follows also from the construction of the away from each other in the direction of the pinchers that their grasp is confined to very pressure exercised upon them.

0 narrow limits, since the legs of the pinchers In order to enable our invention to betully 80 must execute a movement of considerable exunderstood we will describe the same by refertent relatively to the grasp of the jaws. ence to the accompanying-"drawings in which, For the same reason moreover, the expendi- Figure 1 is a side view of a pair of pliers ture of force required in using the pinchers constructed according to our invention and of the present form is relatively very much showing the pliers in the open position, Fig. 85- greater, for since the legs have to open very 2 is a similar View showing the pliers in the widely the proportionate power of the lever closed position, and, Fig. 3 is asimilar view to entire other side of the fulcrum is much re- Fig. 2 but with the cross links removed. stricted. A further disadvantage lies in the A, B are the two legs and O, C and D, D

fact that in pinchers of the present form the are cross joints connected on both sides to the 0 jaws execute a forward movement as they legs A, B. Each of these cross joints conare being closed. This disadvantage makes sists of two links 0 and O and D and D reitself especially felt in minute work, such as spectively. These links overlie each other at that of makers of delicate machinery and about their middle point and are jointed to- 5 watchmakers, so that no little practice is regether by a pin E in such a way that each of 9 5 quired in working with pinchers of the pres the cross joints forms two pairs of legs of out form. All the obj cctions above referred about equal. length. The ends of one of each to are obviated by the present invention, in of these two pairs of legs are connected with which the two legs of the pinchers and their the jaws by the pins F on which they turn jaws consist of two parts so connected with with the two legs A, B of the pliers. The 10c ends of the other pair of legs of the cross joints 0, C and D, D are guided by pins G Working in slots H of the legs A, B of the pliers. When the pliers are opened or closed, the pins G move along the slots H of the legs A, 13 of the pliers.

In the method of construction now being 1.6--

combination with two jaws and legs each jaw and leg being in one piece which is situated entirely on one side of the instrument, of two pairs of crossed links one pair on each side of the legs, the links of each pair being pivoted together at their intersection and being connected each at one end with the jaws by pins on which they turn and at the other end by pins which work in slots in the legs, substantially as herein set forth.

2. In parallel pinchers, and the like, the combination with legs A B each made in one solid piece with one of the jaws, of cross links 0, C and D, D applied on both sides of the legs and adapted to move parallel to each other, the ends of such links being connected to the legs A, B of the pinchers on one side of the joint by pinsF on which they turn and on the other side by pins G which Work in slots H in the legs so that the cross links can both rotate and slide, substantially as hereinbefore described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

FRIEDRICH LORENZ VONIIAUS. HEINRICH BECKER.

Witnesses:

FRANZ HASSL XCHER, FRIEDRICH CORRELL.