US2783483A - Wire crimping and cutting pliers - Google Patents

Description

March 5, 1957 H W SE1-[ER 2,783,483

WIRE CRIMPING AND CUTTING PLIERS Filed Sept. 19, 1955 2V /Z 27 S /Za 234,

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IN VEN TOR.

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WIRE CRIMPING AND CUTTING PIIERS;

Henry W. Seher, Elkins ParkPa.,' y assignor. to Ehilco Corporation, Philadelphia, Pa., acci-porationV of` Pennsylvania Application September 19, 1955;.SerialNo. 534,910'

2. Claims (CLJ-5.6).

This invention relates to-metal forming and` shearingtoolsL and" has as-its general objective the provision-fof pliers, or' similar devices, having'cooperatingljaw means provided with' both wire bending andi cutting elements. While of 'broader utility, pliers embodying` the principlesv of kmy invention are especially adaptedforfusefin theel'd of so called printed wiring.

inthe art ofprinted wiringit-isfrequentlythefpractice to attachvcomponents to panels, th'rougglrtheeagency of the component lead wires. In attaching -a'componentby'- thismethod-itsleadwiresare iirst inserted through aper-lA tures that pierce both the insulating Vpaneland'tlie conduc#r tive strips which define the printed wirecircuit; The wires areithen cut-to` desired' lengths and'bentltoiwardfth'e printed wire circuit carried' by the panel. Follcwingfthis` operation, and in order permanently to`attacli1the com'- poncnt, the leadwiresl are soldered, by known' means; t'o. the'printed wiring. In order to obtain optimum'. solderE connections, particularly when dipsoldering, itis^common, prior to soldering, to form secondary bends inthe leadlwires. Secondary, or reverse, bendingfofafwire lead in conjunction with the'first bend' as described; resultsvin` a conguration characterized by a generally; Uf-sliapedtailf of wire having one leg adjacent, and-its other legfextending' away from, the printed wire panel. It is an object of this invention tol provide a simple hand tool that will form component lead wires adapted for attachment by this method.

It is another object of this inventiontofprovide alpliers which will both crimp and cut a wireina single movement of its jaws.

In.- the accomplishment of these objectives, the-present invention contemplates the provision of plier jaws that will engage a wire, for example a wire extending through an aperture of a printed wire panel, sever an end portion of the wire, bend a first portion of the remaining wire toward the panel, and bend an adjacent second portion of the wire away from the panel and at an angle to the lirst bent portion.

The manner in which the objects and advantages of the invention may best be achieved will be clearly understood from a consideration of the following description, taken in conjunction with the accompanying drawing in which:

Figure l is a plan view of a plier tool having jaw means that include an embodiment of my invention;

Figure 2 is a fragmentary view illustrating the way in which the plier jaws engage a wire lead of a component to be mounted upon a printed wire panel;

Figure 3 is similar to Figure 2, and shows the condition after closing of the jaws upon the wire;

Figure 4 is similar to Figure 3, but illustrating release of the jaws from the wire; and

Figure 5 illustrates a modified embodiment of the plier jaw means.

Now making more detailed reference to the drawing, and particularly to Figure 1 thereof, there is illustrated, by way of example, a plier tool having handles 11 y, 2,783,483 atented Mar. 5, 1957 integralwith jaws` or headmembers 12 and' 13. Handles 1'I; with'their'respective'jaws 12 and. 13; are swiveled upon' pivot pin114therebygproviding' for movement of the jaws toward and away from' each other. The jaws furtherinclude`cooperatinggrippingl surfaces 1'5 and 1'6, and, disposed", adjacent the gripping surfaces'and transverse the outer. ends' of the' jaws; are complementary'cutting edges sti'owniatIT and IS EdgeM 1.7"overlies`itsf complementary cutting edge` 18, and fi'nrmsA a portion* of :an upstandingV flange lZ5' which also lies transverse jaw12.; Upstanding flange 25 further includes a rounrlf'e'dv edge portion; or surface,="34-wliiclr1extend"s downwardlyfrom cutting'Y edge 17 irrtlredirecticnoftlie free end? portion'of jaw 12'. The Qutexendi of` jaw13 includesa web-like section Ziladjacent`l cutting' edge` 18, and a: tiange 19 is' carried at the onterendothcjawby tliejweb; Flange 19; web 20,' andI versely'of the jawf13: .This groove 21` is presented to? wardi the opposite jaw 1211 Similarly the outer end. of jaw 12, includes outeringe ZZI'and' web 23; both of which, along with' flange 25; form a channel-like groove 24wliich liestransverse"jawY 12. The open' side of groove Z'ltfa'ces'inthe directiomoffitscomplementary groove 21, andi with'the jaws;in closedwire engaging position (Figa Ure3f)it= can'be seen tliat flange22advantageous1y overliesiiange 19's," forreasonstobe hereinafterv more fully explained j In alniodiii'ediembodiment of "my invention (Figure 5) there are shown. plier jaws. 12a and`13a'having coniplementary cutting edges" ITaand 18h frmedintegrally with' their? respective' jaws: These cutting edges, 17a and, 18a; are adjacent, respectiveA inner gripping faces 1521i and* 16h, andJ cutting edge' 18a: fo'rmsa` portion of' ilange Z'S; Upstandinghange 25a' further includes a; rounded"ed`ge portion, or" surface, 34u which extends downwardly from' cutting'- edge 17"'in the direction of the free endportin'ojaw 12a;V A'ttachedtto'the outer face of jaw 13a is. an angle member 26 which includes; a mounting;portion 21lavtlirougli which pass screws S", and a leg portionv 19a'l which"v forms the outer llange ofw jaw 13a. Similarly, angle memberZT is'attached to an outer face oibjawy 12h bymeans'of screws S passingthrough a mounting portion 23u: A leg 22a formsthe` outer flange oiijawIZ'andoverlies'ange 19a of"jaw 13a.l Grooves 21u and 24r'areforrned bythe' cooperating cutting edges and' an'ge" members.

I In' perfomance of thewire bending operation, and consideringthe plers'oftl'ie invention as being used in the fabrication of printed circuitry, it will now be under.- stood that there is provided a printed wire panel 28 (Figure 2), including an insulating sheet 29 and printed circuit portions 30. Apertures 31 are provided in the panel 28 through which leads 32 of a component 33 have been passed. (inasmuch as both leads are to be cut and bent in an identical manner, the ensuing description is com cerned with but a single wire lead.) In mounting component 33 to panel 28, the plier jaws are opened and anged portion 22 (Figure 2) of plier jaw 12 is brought to bear against panel 28, in the region of printed circuit 30 and adjacent a wire lead 32, in a manner causing the extended wire lead 32 to be disposed transverse the grooves 21 and 24 and between the gripping faces 15 and 16. The plier jaws are then closed upon the wire 32, whereupon ange 19, by virtue of its being spaced inwardly from overlying lip 22, is urged against the wire lead. Further pressure upon the wire-as results from further closure of the jaws upon the wire-by flange 19 (Figure 2) causes an initial bend of the wire 32 to take place about anvil- like flanges 22 and 25 of jaw 12. The initial bending is closely followed by engaging of an end portion of the wire by the cutting edges 17 and 18. A

final exertion of pressure (Figure 3) upon wire 32, severs Y an end portion 32a of the wire through the agency of cutting edges 17 and 1S.

A portion of the remaining lead wire is bent in a leverlike action, by flange 19, about flange 22` as a fulcrurn. Simultaneously with the foregoing bend, the hairpin 3211, or reverse bend desired, is formed by a lever-like wiping action of the rounded edge portion 34, carried by flange 25, against the end portion of the wire 32 which moves about liange 19 as a` fulcrum. The severed wire 32a is then gripped by the jaws and the travel of the jaws is thus advantageously limited. Additional pressure upon the bent wire, which may damage this portion of the'wire, is thereby prevented. l Y t As can now be seen (Figure 3) from the foregoing description the plier jaws have advantageously severed the excess portion ofthe lead wire, and a ange of one jaw has forced the remaining wire into a lgrooved portion of another jaw to form the desired reverse bend, or crimp.

To complete the bending operation the plier jaws are opened (Figure 4) thereby permitting the severed wire to fall from the jaws, and releasingthe bending elements of the jaws from the bent wire leads. I, l

In the bending operation using the embodiment Villustrated in Figure 5, which is identical with thebending operation already described, ange 22a is placed against the panel adjacent the wire to be crimped, whereupon the plier jaws are closed upon theA wrie causing an end portion to be severed by cooperating cutting edges l17a and 18a. Bending of the remaining portion of'therwire cutting and crimping metal. It should be further understood that the tool of this invention need not be limited to cutting and crimping cylindrically formed metal wire, but may advantageously be utilized in cutting and crimping of metal having other cross sectional congurations, such as, for example, rectangular or oval sections.

I claim:

1. A plier type wire cutting and forming tool, comprising a pair of levers pivoted intermediate their ends to form confronting jaws and a pair of opposed jawoperating handles, the free end portions of said jaws being provided with wirecutting and forming means ncluding: knife means having a pair of cutting edges and structure defining a curved surface extending from the region of one of said cutting edges toward the free end portion of one of said jaws, said knife means being operable, in response to closing of said jaws, to sever a Wire 2. For use in the manufacture of printed wiring panels or the like, a plier type cutting and forming tool for severing and crimping a component lead-support wire extending through an aperture formed in a printed wiring panel, said tool comprising: a pair of levers pivoted intermediate theirY ends to form handles on one side of the pivot and a pair of elongated opposed jaws disposed on -the opposite side of said pivot and mounted for movenient-toward and away from one another; means deningcooperating wire cutting elements extending transverse said jaws, the element carried by one ofV said jaws being of blade-like conliguration and having cutting means disposed along one edge portion and a rounded surface portion disposed adjacent said cutting means and adjoining said edge portion; web sections disposed adjacent andk extending away from said cutting elements; the free ends of said jaws having flange portions carried by andextending transverse said web sections, one of said ilange portions and its web section in combination with said blade-likev cutting element forming a channel-like groove in Yone of said jaws, said groove being presented toward the other of said flange portions, and Ysaid other flange ,portionA being adapted for movement into said groove, said one ange portion being adapted for placement against the printed wiring panel adjacent the said component lead-support wire extending through said panel in such manner that said wire extends transversely of said ange portions and said cutting elements, whereby closing of thejaws severs an end portion of the wire and elects bendingjnfv the remaining portion by said other flange portion moving into said groove.

References Cited in the lile of this patent UNITED STATES PATENTS 456,966 Schweeters Aug. 4, 1891 1,887,732 Pagel et al. Nov. l5, 1932 2,212,888 Sunshine et al Aug. 27, 1940 2,279,068 Siebraudt Apr. 7, 1942 2,359,083 Carlson Sept. 26, 1944

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