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Publication numberUS1273713 A
Publication typeGrant
Publication dateJul 23, 1918
Filing dateAug 24, 1917
Priority dateAug 24, 1917
Publication numberUS 1273713 A, US 1273713A, US-A-1273713, US1273713 A, US1273713A
InventorsSolomon E Aaron
Original AssigneeSolomon E Aaron
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1273713 A
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Description  (OCR text may contain errors)




1 ,273 ,7 1 3 Patented July 23, 1918.

E9 1 I 771 76 w Q l I 7 J F: ii i ,5 76 Stinks: fiaZorrwnZiAavon UNITED STATES PATE T SOLOMON E. AARON, or BOSTON, MASSACHUSETTS.


To all whom it m'ay concern:

Be it known that I, SOLOMON E. AARON, a citizen of the United States, residing at Boston, inth county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Pliers; and I do hereby declare the following vtolbe a full, clear, and exact-description'of the invention, such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates more particularly to a typeof tools designed for use by electricians and others, to facilitate the removal of insulation from various kinds of insulated electrical wire.

It is one of the objects of the present invention to provide for the removal with facility and the least possible injury to the metallic member of the wire, of the insulation therefrom and especially provide for the facilitation'of the removal-of insulation from the twin wires'bothof a round type and a flat type. 7 Y 7 Electricians freuently have, in the prac:

tice of their occupation, to remove ;i11sula-' tion from twin wires ofdiflerent type, one

form of this wire having the insulationjof transverse section of which is circular,-

while in the other form of the wire. the

transverse section; is more or less elliptical so that the insulationassumesa relat vely to provide apair ofpliers with means for removing accurately; rapidly and thoroughly the Y insulation from eitherfround twin'wijre or fiat twin wire,"and.- for the; ac-

complishinent of thisobj ect, I provid a toolhaving on ea choppo'sit'e side :a pair of ou ting blades disposedv so as to more efficiently, secure the desiredobject.

A further object ,of, my invention is to.

improve the c onstruction of; pliers having means "forstr 'pp' ng and removing the insulationifrom electrical; conductorstand particularly to provide-i'such a tool which.

the splitting and stripping ineans are so arranged {that strength of parts :is obtained and at the' sameltime la ltool is providecl which is neat and fattractive in appearance.

and Which'willpack readily in'a kit and to hand tools, and i the bad e 5f which kmay be r'aduy renewed orremoved for sharpening which may be required.) j V Withthe above object in view the inven-j 3 tion consists inthe combination of the parts;

construction, and in details'of construction;

embodiments in I the accompanying drawmgwherem:

provided with the splitters. 7 v

Fig. 2 is a plan-view of the tool.-v

as -will be 1 more fully hereinafter described,- the invention being illustrated in various v sp ecifimtionof Letters Patent. 5 Patented. July 23, 1918.1; Application filed gust 24, 1917. f semina 188,026. I I

-Fig. 3- is a side elevation of thelsame tool looking at the side thereof showing the strippers. q f r a V r, Y a a Fig. 4 is n end elevation ofthe; pliers lookingqtoward the jaw endthereof.

Fig. 5 is a perspective view of one of the detachedplates ha'vingthe cutter members. 7

Fig. 6 shows a. slightly modified form of l the invention in which the cutter plate is therein; 1 V

presentinvention to provide an electricians Wire stripping and splitting tool in which the respective means for stripping and splitrigidity 9f the P 1 toobtain a tool of;themaximn strgngthg v It is oneof the primary objects of "the I have found byraotual construction maximum strength, rigidity 501 the parts,

tools of the type involvd therein that the simplicity of construction, and economical. methods of manufacture may-all be readily. ,achieved by, employinga few and simple I ipartsas hereinafter shown inithe embodiment. of the invention illustrated in; Figs;

751 to13, wherein Ihave shown a common-and qwell known form of pliers having a pair of handles2v3 which are respeotivelypivotedf l upon a pivot l l 'andprovided at the vopp t S site ends withupper and lower orgopposed 15 55 and, 6,having'meeting-ifaces 7,7;;

hubs of the levers are shown at"18.: The

ggmeeting faces of the aws are recessed as at 19 and transversely dlsposed across one side 75 attached to thetop of one of the jaws with- (out t-he requirement of amortise or'a recess of the recess and at the side of the jaws 56 are arranged side cutters 10-1O in the meeting plane of the jaws 56.

In the practical use of the toola pleceof wire may be readilycutin usual mannerby.

transverse insertion between the side cutters 10-10 which are brought. together by pres: sure applied in the usual manner to the handles 23.

To provide for the ready splitting of a piece. of. standard twinelectrical conducting u suitably hardened to securev durability of.

the stripping edges, having a transverse or body portion 12 of suitable proportion which may be mortised into the recess 13 provided inthe outer surfacesof the jaws, each plateis provided at its end with forwardly projecting arm portionsl l and 15 which gives the plate a general U-shaped formation in plan, these arms being adapted to straddle the side faces of the jaws as shown in Fig. 2, the inner edges'of the jaws lying closely contiguous to the adjacent faces of the jawsand contacting therewith, so as to prevent the plate 12 from having any play about the screw 16 which when passed through the apertures 17 in the plate 12, fastens theplate tothe jaw.

One of the arms 14, in Fig. 5, is preferably bent down at an angle substantially equal'to the bevel of the outer surfaceof the end of a jaw 5 for instance,-and is also provided on its outer end with a downwardly turned portion 17, the plane. of which is parallel to the edge of the arm 14, and is thus parallel and spaced to the side of the plier jaw, the space providing for the passage therebetween of one section of. the wire F, F ig. 2. hen it is desired tosplit this form of wire into-two sections for any suitable length by simply pulling the pliers longitudinally along the piece of wire F to the desired extent after thejaws 5 and 6 have been brought together so that the knife edges 18of the pair of opposed blades 17 approach each other tocut-through the insulation.

For the purpose of providing for the removal of insulation from a piece of wire of the round cross sectional type as shown at R in Fig. 3, the arm 15 of the blade 12, one of which is secured to each of the. outer spaces of the jaws 5 and 6-is shown as provided witha downwardly turned portion 22, Fig. 5, and formed with a cutting edge 23, whichextends in a plane transverse to the arm 15 and therefore to the} adjacent side-.-

faceof the jaws5 andfi the cutting edges of the cutters 23 being disposed in the-pincer plane of the jaws 5 and 6. These stripping blades 23 are provided each with a plurality of notches 2i and 25 of different sizes.

hen it is desired to strip a piece of round twin wire anadjusting screw 20 may be. turned to the desired position to limit the closingof the, jaws and protect the wire core and the handles 23 of the plier separated so as to open the cutters 1010 to the required degree, whereupon the round wire-to be; stripped may be introduced.

lengthwise along the cutters 1010, and these brought together so as to split the outermost insulation. That portion of the I insulation lying between the blades 23 is split and. as the wire is transversely slid along these blades and across the faces of the jaws 5 and 6, the insulation is further crushed to a degree which may be determined by the adjustment of the screw 20 i so as to prevent the cutting of the metallic.


It is an important feature of the present invention, that the cutting blades 17 and position of the respectivecutter members 17.

and 23 at opposite .sides of jaws 5 and 6. this being possible because of the fact that the pairs of cutters 17-17 and 23-23, are both maintained in close position to the respective sides of the pliers by reason oftheir being connected tothe forwardlyextending arms 14 and 15 of the blade 12 which is attached to the plier jaw, This arrangementof the parts, eliminates the tendency of the cutters to spring, which would occur if they were arranged in'the

mote positions from the side of the plier aws.

While it is possible to mortise or recess.

the outer'faces of each of-the jaws as at 13,

to receive the shank 12 ofthe' blade, 13116 134131 ter may be. set. directly on the. outer surface, of the jawsv as shown inFig. 6 by means of plate and jaws as to the'plier members be;-

ing obtained by the parallel relation .of'the.

armslet and 15 to the adjacent side fac'esof the-jaws, the arms frictionallyengagingfthe,,

the screw 16, the desired rigidity of the side faces and therebypreventing anyjtend-l.

ency of the plates to play about the fastens ing 16 which may be utilized to attach it.

From the foregoing it will be seen thatl" have provided a s1mple,practical and illeX",,

pensive tool, whereby both; flat. and insu-= lated w re and round insulated .Wire may.

be handled with facility and insulation quickly split or stripped therefrom and the wire scraped as may be necessary by being introduced into the notches 24 or 25 accordposition and angularity may be resorted to within the principle of the invention.

What I claim as new is: r 1. A pair of splitting and stripping pliers having in combination, jaws with pincer faces, means for controlling theapproach of the said faces, and pairs of plates'se- V cured to the outer faces of the jaws, each plate having a forwardly extending arm at each end, theends of the arms having cutting blades bent toward the plane of the respective face of the jaws.

2. A pair of splitting and stripping pliers having in combination, jaws with pincer faces, means for controlling the approach of the said faces, and pairs of plates secured to the outer faces of the jaws, each plate having a forwardly extending arm at each end, bearing against itsside of a jaw to prevent turning of the plate, the ends of the arms having cutting blades bent toward the plane of the respective face of the j aws;

3. A pair of splitting and stripping pliers having in combination, jaws with pincer faces, means for controlling the approach of the said faces, and pairs of plates secured to the jaws, each plate having cutting blades bent toward the plane of the respective faces of the jaws, one set of blades disposed transversely to a side of the jaws and the other set' disposed in spaced parallel relation thereto. r

4. A pair of splitting and stripping pliersi and plates attached transversely to the jaws,

Copies of this patent may be obtained to:

tive jaw, the blades oneach each plate havingarms projecting forwardly or away from the jaw pivot and 7 provided with cutting blades bent, toward the plane of the respective jaw.

5. A pair of splitting and stripping pliers having in combination, pivoted jaws, means for controlling the approach of the jaws, I

and plates attached transversely to thejaws, each plate having at its ends arms projecting forwardly or away from the jawpivotand provided with cutting blades bent toward theplane of the respective jaw, the inner edgesof the arms lying contiguous to the sides of the jaws.

6. Insulation splitting and stripping 1 means for pliers, comprising a pair of plates attachable to the plier jaws, each plate having a transverse body portion with angularly disposed blades respectively for splitting and stripping insulation, saidblades V disposed perpendicularly to each other.

7. Wire-insulation splitting,stripping and cuttlng pllers, 'comprisnig, in combination,

pivoted levers having pincer jaws atone end transversely recessed ad acent to the fulcrum and provided with side cutters across the recess, and a set of splitting 1 blades disposed parallel to and spaced from one side of the jaws forward of the recess and a pair of stripping blades disposed perpendicularly to the other side of the jaws.

8. A pair of splitting and stripping pliers having, in combination, jaws with pincer faces, and pairs of plates secured transversely to and projecting beyond the jaws and each havingcutting blades bent toward the plane of the pincer face of the respecplate being relatively perpendicular.

9. A pair of splitting and stripping pliers having, in combination, jaws with pincer faces, and pairs of plates secured traris-- versely to and projecting beyond the jaws" and each having cutting blades bent toward theplane of the pincer face ofthe respective jaw, the blades on each plate being relatively perpendicular, the stripping blades having notched edges to embrace a r wire. V e In testimony whereof I aflix my signature;



five cents each, by addressing the"0ommlssioner of Patents,

WashingtomD; G.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4408395 *Dec 21, 1981Oct 11, 1983Dayco CorporationTextile cot remover and method of making and using same
US6055691 *Jul 30, 1998May 2, 2000Dyckerhoff & Widmann AktiengesellschaftMethod of mounting and tensioning a freely tensioned tension member and device for carrying out the method
U.S. Classification81/9.44, 30/91.1, 30/90.6
Cooperative ClassificationH02G1/1224