US2885764A - Tool for preparing and applying wires to terminals - Google Patents

Description

May 12, 1959 R .1B. SHULTERS ETAL TOOL FOR PREPARING AND APPLYING WIRES TO TERMINALS F led. April 18 1955.

3 Sheets-Sheet 1 May 12, 1959 R. B. SHULTERS ETAL 2,885,764

TOOL. FOR PREPARING AND APPLYING WIRES TO TERMINALS Filed April 18, 1955 3 Sheets-Sheet 2 Z J17. JJ-Z/r/ JZZZTS Z0 jv oer faa ZZ'rs Z/ 5015' ic rrc/e 9s May 1959 R. B. SHULTER'S ET AL 2,885,764

TOOL FOR PREPARING AND APPLYING WIRES TO TERMINALS Filed April 1a, 1955 Y 3 Sheets-Sheet 5 Q7- 9 w Ml? Z5 IWIIIIIIIII zaa ftg 51w 66219 5 6, w I J 5 6 j, @501 /mg d 0% S at s .Application'April is, 1955, Serial No. 501,968 9 Claims. (01.29-33) The present invention relates generally to making a connection between a wire and an electrical terminal and more particularly to a tool for effecting such a connection by winding the wire in successive convolutions about andin intimate engagement with the terminal.

Tools of this general character conventionally include a rotary shaft or bit which is disposed within a guide or sleeve, the bit being provided at its forward end with a longitudinal recess for the reception of the terminal and a radially offset longitudinal groove for the reception of thewire. Infthe operation of the tool the bit is rotated and the Wire is wound about the terminal, the wire being withdrawn longitudinally from the groove as it is applied to the terminal. By way of an example of such a tool,

reference is made to United States Patent No. 2,585,010 issued February 12, 1952, to Bell Telephone Laboratories, Incorporated, as assignee of C. N. Hickman, et al.

In tools of the type shown in the afore-mentioned patent theexternal sleeve coactswith the bit so that the wire receiving groove in the bit is closed ,by the contiguous surface of the sleeve and only the forward end of the grooveis accessible for the reception of the end of a wire, therein. Further, the wire must have been previously skinned or stripped ofits insulation since the groove is sized in accordance with the diameter of the wire, i.e., the bare conductor. With such tools experi- *ence has shown that the necessityfor pres tripping is limiting upon the usability of these tools and the stripping operation and the operation comprising the actual insertion of wires into the wire receiving groove is a rela tively delicate and time consuming undertaking.

Fig. 2 is a perspective view of the forward end portion of the tool shown in Fig. 1 with the components illustrated in normal or loading position.

Fig. "3 is a front end elevation of the forward end portion of the tool shown in Fig. 2.

Fig. 4 is alongitudinal section taken substantially in the plane of line 4-4 in Fig. 3.

Fig. 5 is a longitudinal section taken in offset planes as indicated by the line 55 in Fig. 4. p

Fig. 6 is a perspective view similar to Fig. 2 but illustrating component relationship immediately succeeding cutting operation. v

Figs. 7, 8, 9 and 10, :are a series 'of fragmentary longi-' tudinalsections similar to Fig. 4 illustrating thevarious component relationships succeeding the cutting operation and including the positioning of the Wire to be applied to the terminal, the removal of the insulation therefrom," and the initiation of .the application thereof to a terminal. r Fig. 11 is a central longitudinalsection similar. to Fig.

4 but showing the components of the forward end of the illustrative tool in condition for applying a wire to a terminal. V i

Fig. 12 is a transverse section taken substantially in the plane of line 12-12 in Fig. 11. r

Fig. 13 is a plan view of the front end portion of the tools bit and sleeve. 1

While the invention is susceptible of various modifications and alternative constructions there is shown in the drawings and will herein be described in detail one presently preferred embodiment, but it is to be understood 'thatit is not thereby intended to limit the invention to the specific form disclosed, but on the contrary it is intended to cover all modifications and alternative constructions falling within the spirit and scope of the invention as expressed in the appended claims;

Referring more particularly to the drawings, there is shown in Fig. la power operated'tool for elfectinga connection between -a wire and a terminal. In general, this'illustrative tool includes a body 10 which is equipped with a pistol-grip type handle 12 mounting a triggerlike finger piece 14 by means of which power suppliedto-the It is an object of the present invention, therefore to" provide an improved tool for connecting wires to terminals which is elfective not only to make the actual connection butfin addition is capable of receiving wire as it is supplied fro m a supply spool or the like, and to'prepare the wire for the connecting operation. p

(A more particular object lies in the provision inatool able cable 16 attached to-thetool at the base of the" tool is'controlled. Theexemplarytool is adapted for electrical operation and suflice it to say for present purposes it incorporates within the body 10 a rotary elecf tric motor to which power is supplied by way ofasuithandle 12. The finger piece 14 is operatively 'associatedwith a switch (not shown) disposed within the handle 12 1 At its forward end the tool terminates in a nose as-j;

ofthe aforesaid general character of anirnproved construction and arrangement facilitating the reception of an insulatedwire, cutting it to a predetermined length, stripping the desired amount of insulationflierefromand forming a connection of the wire thus received and prepared with a terminal.

A further object of the invention is to provide a tool which effectively receives, prepares and applies a wire to a terminal, and at the same time is of minimum nose or tip dimension permitting use in places where space is at a premium, which is so constructed and arranged as to minimize the danger of damage to the wire, as by nicking or the like, and which permits of economical manufacture.

sembly, generally designated 18, which includes a wire winding bit '20 disposed within a forward projecting sleeve 21and whichmay incorporatesuitable speed re- 3 duction'gearing and clutch mechanism-for coupling 'the' .tools motor to the bit 20.

As'c'an be" seen in the drawings, for example in' Figs. 3, 4, l0 and 11; the bit 20 is provided with a longitudinalrccess 22 for thereception of-a terminal Tabout-which a wire'W is tobe -wound in contiguous helical convolu tions so as to effect an electrical connection therebe-' The objects of the invention thus generally set forth together with other objects and ancillary advantages are attained by the construction and arrangement shown by way of. illustration in the accompanying drawings, in

which: 1

Figure 1 is a side elevation of a power operated tool embodying the featuresnfthe-present invention.

inradially offset relation to the recess 22, extending lon- I gitudinally in the peripheral surface of the bit. In operation the wire W is withdrawn from the groove 24 as it is wound about and in intimate engagement with the 1 terminaLT received'inthe recess22. 2

. Intaccordancewith the present invention the illustr' .Fatented May 2,1959 3 tive tool incorporates an improved construction and arrangement of components facilitating the reception of the wire with its insulation in place thereon just as it is supplied from .a supply spool or the like, and by means of theimproved construction and arrangement the wire. 5 is cut to a predetermined length, is stripped of a predetermined. amount .of l insulation, and is positioned .automatically in the Wire receiving groove 24 for subsequent application .to .a terminal received in the recess 22 of the bit 20.

Inaccordance-with one aspect of the invention the bit and the sleeve 21 are especially formed to permit side loading ofthe wire-W, as distinguished from axial insertion thereof as in priortools More particularly,... the bit and sleeve are constructed and arranged so that .15 the :wire W can be loaded into the tool by. simply laying it acrossmtherbit subsequent manipulation of the componentsof thetool causing the..wire-to be prepared and automatically positioned in the .wire receiving groovep24 of the bit 20 for application to the terminal I. ,Thus -in-20 the. illustrative tool, the sleeve 21 ,is-mounted .for rela-.\. tive longitudinal movement with respect to the bit 20 between anormallyopenorloading positionrand a forward position wherein the contiguous innersurface of the sleeve closes-the wire receiving groove.24-to retain/ the wire W therein. Intermediate its ends the bitis/ relieved. asat 26 .to expose the rear .end of,the,.-wire,receiving groove 24 and is provided atone side of this re-. lieved portion with a wire positioning surface 27 for guiding a wire laid across the relieved apportion thereof toward the wire receiving groove 24. Inthe'loading position of the sleeve (Fig- 2) the forward .end portion of thebit is exposed so that the wire W can be laid acrossthe surface 26. Upon relative forward movement. of .the sleeve 21 with respect to the bit 20, theforward 35 end of the sleeve, as indicated at 28; moves the wire W forwardly toward the bits guide surface 27. Continued forward motion of the sleeve relative to the bit causes g the wire to be directed outwardly along the guide surface 27 and towardthe wire receiving groove 24.v This 40 operation will beapparent from Fig. 7. It-willalsobe seen that movement of the wire outwardly along the guide surface 27 of the bit 20 by the forward end28 ofthe sleeve 21 also results incircumferential movement of.the Wire'W with respectto the sleeve. To furtherfacilitate positioning of the wire W with respect to the groove 24, the sleeve may be provided with an additional guide surface, here shownin the form-of anotch 29.- The notch is disposed in alined relation with the -wire receiving groove 24 of thebit 20- and is thus positioned for engagement of the wire when it has reached the outermost limit of the bit-guide surface 27 so as to retain thewire-in-alinement with" the groove 24. It will alsobe seen that further 'forward movement of the'sleeve 21 with respect to the bit automatically -directsethe wire 55 alongthegroove'24. 1

Means-is provided for 'movingthe'sleeve 24 longi-w tudinally with respect-to the bit 20 between its rearmostf or. loading position-(Fig. 2), andits*ful1y forwardforoperating position (Fig. 11). Inthe present.instance,. .30 manually" operable means has been provided for; this purpose though it will be readily-apparent toone-ski'lled, in theart that a tool of this character-;canincorporate; power. actuated means forthis-purpose. As shown, the nose assernbly 18 isequipped with a collar 30 mounting 5 a stationary arm 32. A lever- 34 is pivoted .;intermedia te its" ends, as at--35,- on'theouter'end of the arm; 32. V The: upper end 3411 of-the lever-34 isreceived-in a peripheral channel 36 formedadjacent the-rear end" of f the sleeve; 21.- To permit relative-=movementlbetween the-"16Vel;I 70 end 34a and'the sleeve" 21: in the. channel 36the1'endl- 34ais :rounded and adjacent theendr34i1 the-lever 34:187. necked j down. This construction: and. *arranger'nent'- permits free fore and aft, rocking movement: ofr tlrierle'veraabcut-rthe pivotcwwhich:movementisimilarlysproduces 75 :of the apertures 54.

forward and rearward movement of the sleeve 21 with respect to the bit 20; To produce such movementof the lever 34 its lower end is connected by means of a link 38 to a finger piece 40. At its upper end the finger piece 40 is pivotally connected at 41 to the body 10. The lower end of the finger piece 40 is formed and disposed for convenient manipulation by the fingers of an operator holding the illustrative. tool. It will-be seen from this construction and arrangement that a squeezing of thefinger piece, 40,. so as to move its lower end toward the ,handle 12' of the tool, causes rearwardmotion of mally urges the lever 34 and the finger piece .40 toward the" positions thereof shown in Figs. 1 and 2 and thus it is interposed in a tensioned condition between the stationary arm 32 and the.link 38 adjacent the rear.end'of the latter so. as to exert a pulling force thereon.

In carrying out another aspect of the present invention, means is provided for cutting the wire W that is loaded into the tool to a predetermined length. Such length being determined, in general, by the amount of wirerequired I in the formation of a predetermined number of convolu tions of the wire to be placed about the terminal T in. effecting connection of the wire to the terminal. In the present instance this means includes a pair of relatively movable cutting edges which are disposed to cross one another in the movement of the sleeve 21 with respect I to the bit 20, so as to shear the wire. Thus, one of the cutting edges is fixed with respect to the bit 20 and the other is fixed with respect to the sleeve 21. In the illustrative tool the sleeve 21 has mounted thereon adjacent its rear end a collar 45 which is longitudinally slotted as at 46 to define with the forward transverse face of the sleeve.

a cutting edge v48. The cutting edge 48 is disposed for.

cooperation with a cuttingedge 50 formed alongtheupper rear side of a pin 52 which is fixed with respect to the bit 20 and .projects generally radially therefrom through an elongated longitudinally disposed slot 53 formed in the.

sleeve 21. Preferably the edge 50 is formed by chamfering the rear face of the pin 52 so that the edge .50 extends 1 V outward and rearward from the bit 20. This construction.

disposes the edge 50 whereby the cutting edge 48 of the sleeve 45 traverses it progressively from its outermost towards its innermost end as the sleeve 45 moves forward;

ly with respect thereto in the forward movement of the.

sleeve 21. To receive the pin 52 the bit 24 is transversely apertured as at 54 and a series of apertures 54, spaced longitudinally with respect to each other; are provided to permit alternative location of the pin 52 andihuslof,

its cutting edge 50 whereby to permit adjustment of the length of-wire remaining loaded in the tool afterthe.

cutting operation. To retain the cutting edge 50-alined with respect to the cutting edge 48, i.e., to prevent rotation of the pin 52, the outer end portion thereof is elongated and the-inner end of this elongated portion is receivedin a channel 55 formed longitudinally in the outersurface of the bit 20 and intersecting the outer ends of the apertures 54. The channel 55 is of a width correspondingto-that ofthe pin 52 so that'its side walls engage the sides of the elongated'portion of the pin 52.

To provide access to the inner end of the pin 52'the; sleeve 21 has an opening 56 formed therein opposite the slot53 which opening permits the insertion of a drift: pin-or the like against the innermost end of the pin 52v whereby the pincan be ejected from therespective'; ones As shown, the sleeve 45 'is fixed inplacev uponthe by merelyloosening the set screw's the sleeve 45 may be i readily removed. This constructional feature together with the particular construction of the sleeve 45, as here mbefore described, to define its cutting edge 48 permits the cutting edgeto be restored to a sharp condition by simply removing the sleeve andface-grinding it. Similarly, the cutting edge 50 of thepin 52 can be restored by a with respect to the bit and prevents any relative rotary movement therebetween. Thus, maintenance of proper ahnement of the cutting edges 48 and 50 and of the positionin'g notch 29 of the sleeve 21 and the wire receiving groove 24 ofthe bit is insured.

As shown, the wire W is of the type commonly referred to as hookup wire," and it includes a conductor C having a covelingof insulation I thereon. In accordancewith still another aspect of the present invention, means is pro vided for severing the insulation I and for strippingit from the conductor C so as to bare the conductor for. apphcatlon to the terminal T to efiect an electrical connec- 7 tion therebetween. More particularly, the present inven,'

tionnot only contemplates cutting of the insulation I at a point'spaced from the end of the wire W but additionally contemplates separating thecut portions of the insulation so that severance of the insulationiscomplete. Further,

the'invention contemplatesaccomplishing this end prior to mltiation of the winding operation to apply the conductor C to the terminal T.

In carrying out this aspect of the invention the forward or leading edge of the sleeve 21 is utilized in, cooperation -with-"the forward end portion ofthebit 20,

in which the'groove24 is formedjand especially that portion thereof that defines the rear end of the groove 24.- As hereinbeforenotedthe wirereceiving groove 24 is sized in transverse dimension to receive the conductor C of; the wire W, i.e., the groove 24-is complementally formed with respect to the bare conductor C. It will be recalled from the foregoing description herein that upon forward movementof the sleeve 21 from its r'earmostorloadingposition,its forward end'28 engages the wire W and moves it outwardly along the bit guide surface 27" and circumferentially along the end 28 of the sleeve 21 toward the open rear end. of the wire receiving groove 24. Since the wire receiving groove corresponds in transverse dimension to the diameter of the conductor C, the wire W with the insulation I thereon is prevented from dropping into the groove 24.- Thus,

the lower edgeof'the sleeve 21 along the innermost edge of the notch 29, as indicated at 60, upon continued forward movement of the sleeve, bites into the insulation I, and=forces that portion of the insulation immediately aheadof this edge forwardly. At the same time,isuch' continued forward motion of the sleeve 21 tends to force thelwireW into the rear endof thewire receiving groove 24. ltwiil' be apparent froman observation of Figs. 2

and 6 that'upon relieving the bit 20 at 26 the forward end 'thereof was provided with arear surface 62 disposed transversely of the bit. This construction provides the'rearend of the wire receiving groove 24 with rela tively sharp edges 64. Since the groove is dimensioned to receive only the conductor C of thewire W the forcing downward of the wire W into the rear end of the groove, upon forwardmovement of thewsleeve 21 with respect to the bit 20, causes the side edges 64 to cut the insulation I and leaves forward endof the severed portion of the insulationin engagement with the transverse rear face 62 of the bit. Slight additional forwardlmovementof the sleeve 2 1wi'll, therefore, cause complete partingof the thus severed insulation.

As just above noted, the severed end portion of the insulation abuts the transverse face 62 of the forward end portion of the bit 20 and is thusheld against forward movement as the sleeve 21' continues to move forwardly. Further by virtue of its engagement with the wire W just ahead of the insulation cut the sleeve 21 carries the wire W forwardly with it. As a result the trailing portion of the conductor C of the wire W is withdrawn from the severed portion of the insulation I and at the same time is pulled along the wire receiving groove 24 until the sleeve 21reaches its forwardmost position as shown in Fig. 11. w t

The wire W is thus fully prepared for application to the terminal T when the latter is inserted in the terminal receiving recess 22 of the bit 20. Upon initiation of rotation of the bit to wind the wire, or more particularly, the bared conductor C thereof, about the terminal T the conductor C is withdrawn forwardly or outwardly through thewire receiving" groove 24. In sodoing the trailing '11, registers withthe relievedportion 26 of the bit 20.

To minimize the danger of damage to the conductor C as, for example, by nicking of the conductor by the bight portion of the rear end of the wire receiving groove 24 '"as' the wire is urged downwardly'into the rear end of the groove, as-a result of the action of the forwardly moving sleeve 21 thereon, the groove 24 adjacent its rear end is deepened, as at 65, so as to'receive that portion of the insulation I that is disposed immediatelybeneath the point of contact with the wire W of the cutting edge 60 of the sleeve121, Thisdeepeningof the groove 24is effected to a depth substantially equal to the thickness'of the insulation. With the'insulation I between this 'portionof the bottom of "the groove and-the conductor C, the latter is cushioned, i.e., thewire W is prevented from being forced against the lower rear edge portion of the groove 24-at that point. Thus, it is not likely tobe damaged. As a result, the conductor is not weakened and is not likely to be broken as it is withdrawn through the Wire receiving groove 2'4 during the subsequent winding operation wherein the conductor C is applied to the terminal T. I i

From the foregoing, therefore, it will be apparent that a tool constructed and arranged in accordance with the teachings of the present invention permits of ready in- .sertion of a wire therein simply by laying the wire across the bit with the sleeve in its retracted position. Further, upon operation of'the device, relative movement is produced between the bit and the sleeve whereby the end of the wire'.is utto the predetermined desired length. N

:The. wire is automatically positioned for reception in the wire receiving groove, has its insulation severed and parted so that the insulation is stripped from the end of the wires conductor as it iswithdrawn through the. wire receiving'groove of the bit and is wound about and in intimate engagement with the terminals It is also apparent that the cutting edges incorporated in the tool exemplifying the present invention are of durable form and can be readily resharpenedas might become necessary; This latter can be accomplished simply by re- .moving and face-grinding the sleeve 45 and the 'pin 52 which provide the Wire-cutting edges 48 and 50, and by i q J CPQ'PQ P SJ Q t e-iFP fl Q l m; s and arfiarigeiiient is of relatively:simple .fo%-requiring a min mu m qr i di u l 9 mm.. ts-and;" achinii goper ations to formwthe same. Bythe same token thelsimplicityof the components and their inherent rugged 5 charaeter not only permits their economical manufacture.but; also permits thernijto be formed of minimum sizentherebylminimizing the tip: dimensions ofethe 1001; to :the/end that its utiiityis enhanced particularly for applicationswhere space is at a premium.

Weclaim as our invention;

1. In a tool vfor \preparing and applying an insulated wire to a terminal by winding -the sarne about the ter minal, the combination comprising a bit adapted for r0 receiving reeess in the forward end-thereof and a wire receiving groove spacediradially outward from said reces s,- the bit being relieved intermediate its sends to definethe rear, end of said groove and to provide the same with relatively sharp rear vedges, a sleeve te lescoped. over said bit and mounted for longitudinal movement; wit l respect thereto, said sleeve having a sharp front edge a first wire cutting edge fi ged on said sleeve and a second wire cutting edge fixedwith respect to said bit and disposed for cooperation with said first wire cut; ting edge,during longitudinal movement of. said sleeve \1 with respect to said bit, said bit and said sleeve -having guide surfaces thereon for directing saidwire towardsaid with respect to said bit, -said sleeve front edge being BOQ.

engag eab le withthe wire to bite into, its insula tionalid to 1 r a ins di ha grqgve e srfi r. to :wtv i s lation. d s e v flur n ju there qtw rd I it dina m em n t e Wi Q g 9 Y to Pa t e su a qa. .and;; .d.- ro v e s b in pfctiv to. h d e 'l cve d i la o q t oa l inse vfiment with; the Wi e s; t i W th rawn hr4fl 2, a 1- groove .up on rotation of said bit to wind the wire about 7 the, terminal whereby the conductor of the wire is 13311631 n m tefi e ntw ht r t allulu a tool. for-Preparing d app x zran; in u a ed. e 5 a minal; e.mb, n 2nr-.-sqm n a t g a W r w r m rmed i stre h lz, i e id r o es rm pqnd n vi w d h 1 s z ameten of, the conductor of the wire the bitbeing relieved intermediate it s end site define the; rear end ofe i 9Y: and. o ,r pv de he. ns th ti y nn n edges, a d; a ev 1 =s P i Y a d o t. limp nt d r ud rnaltmov mqnt t re pec qr o,; a s ev h v n har ntsd ea d m an for moving said sleeve longitudinally; with respectto said bit; with, the forward end of said sleeve traversing Ih E fSUfXH-CIidF'POITfiQIi of said vbit, the forward. end 0f said sleev'ei front edge beingQengageable with the wire during. forward longitudinal movement.r thereof with re-. spect jtbgs'aid bit-toalbitelinto it sjinsiilation land to urge the: wire intolthe rear end ,of the, groove "andithe. insula tion against said sharp groovefedgesso as' to cutthe inf. sulation, and said sleeve during jfurthermforward' lo ngi H tudin'al movement urgingthe wire along'.,,said groove as the forward end thereof;traversestherohtenfendlpdr I tion,,of,said, bitwith .said rear groove edgsrstraihihg. theicutfinsulation so. as to part th'eL'insulation 3.'fIn. a tool for prepa zing g and applyinglan insnlated iaai k fi vi ia fi qbin ip -'wmPri nsV- bi '65; having a wire receiving groovei forrned in its peripheral ete -1a t i. re nna j a w me e n q rof t u 1 b@ r ie ed lt r:v di -s d we d h a and g nsa do v I.

sltt y r yid ihc sam with-re tive y sharp ar.; d

a m mbe .nt imtcd ,f rqi n imd na r m vement i h r spect; t -,saidbi t so,as;totraverse saigi grooye, and; means for moving v; said. member longitudinally; with r'et spect to .nsaidu-bit said bitr and. saiclmember rhayingwguide t surfaces thereon coacting during forward longitudinalrecessruponarotationofsaid bit H H a 10 -withlth'e wireas the wire is movedforwardly alon to ,said -bit urging the wire into the rearofg said g groove, and its 1 insulation against saidsharp .groove edges so as to cut the insulation and uponwcontinuedforward longitndinal-movement thereof to draw the wire-along said groove jto-part the insulation, said .rear groove. edge holding the severed insulation portionagainst movemen said groove so as to .bare the conductor of th e wire;f orr intimate engagementwiththe terminal.

4.5111121 tool for preparing and applying ar -insulated wire to a terminal, the combination comprising a rotary-.

tationtwith-respect to the terminal andhavinga terminal 15 v ng a 7 terminal i ,t -.f s

movement of said sleeve with respect to said bit for on ting said, wire to a predetermined length, and cutting meahsQ-respectively carried by said sleeve and; bit and engageable with the wireu in the forward longitnd ngl and separate the-ins l ationupon the wire-said sleeve du ing i it sforward longitudinal movement further draw' the .wire along said groove into PO Sl tlQItfOIf -aPPIQEiiQ to the. terminal upon rotation'of said bit.

5. Iris-a too 1 forpreparing and applying an insulated; wire'tola terminal, the combination comprising. a rot bitnh avi ng v a terminal receiving 1 recess. in the 7 forward I e11d,,.thereof and awire receiving groove spaced iradiallyeout ward from said recess the bit being relieved; intermediate its ends to define the rear end of saidgroove 3 and to provide the same with relatively sha pgreanedges,

a sleeve teleseoped over said bit and mounted for longitudinalcmovement with respect thereto, a men ber. on, said;;sleeve and spaced from the forward endathereof and providing a first wire cutting edge,- a second mem- *the wire to urge the wire into the rearv endof said groove and the insulationagainst said sharp groove edgeslupolii, relativetlongitiidinal movement thereof was to. cu t lthe ins latior and -to move the wire along said-groove 1:0,, part the insulation and position the conductor of the wire ;wit hin .said groove wherebyupon rotation of;said bit-the wire iswound about the terminal withrthe eon-n. duetor bated for intimate engagement. therewith.

6. In-a tool for preparingand applying aninsulated wire to a terminal, the combination comprising a ro t ary bit ihavingian internal,terminal receivingrecess and. a wire receiving groove in the peripheral surfacrelof the forward end portion thereof terminating inrspaced, re-i. lation to the forward enjdof said bit, said groovecorre: spending, in width to the diameter of ,thewires-tconr-h ductonand; corresponding in depth at the .forwa'rdnendt thereof to theirconductor diameter andubeingdeepenedr. at \the rearend thereof to correspond to the..c"onductortv diameterjplus one 7 thickness of the..wires insu1ation,. means mounted for relative longitudinal movementswithn. respect .to said bit to traverse. said groove, said means being-arranged .to engage thewireduring its relativefor ward movement with respectrto said bit to pressv the" wire into the rear end of the groovelto cut theinsulation upon said ;wire.and during continued forward longituy dinalrnovement thereof'with respect to said bit-:to -furthendra'wmthe wire along said groove separating the insulatio'nand moving the bared conductor of the wire into. 7 positionrforapplication .to 'a terminal receivedv in saidrzf,

7. A tool for preparing and applying an insulated wire to a terminal, the combination comprising a rotary bit having a terminal receiving recess in the forward end thereof and a longitudinally disposed wire receiving groove formed in the peripheral surface thereof adjacent its forward end, said bit being relieved intermediate its ends to provide a transverse face defining the rear end of said groove and providing the same with relatively sharp rear edges, a sleeve telescoped over said bit and mounted for longitudinal movement with respect thereto, said sleeve having a longitudinal slot in one side thereof, a pin projecting outwardly from said bit through said slot and having a cutting edge thereon, a member fixed with respect to said sleeve and defining a cutting edge disposed for cooperation with the cutting edge of said pin upon longitudinal movement of said sleeve With respect to said bit, and means for moving said sleeve from a normally retracted position wherein the relieved portion of saidbit is exposed for the reception of the wire to a forward position wherein the forward end of said sleeve traverses said bit and the groove therein, said sleeve being arranged to engage the wire as an incident to its forward movement to press the wire against the sharp groove edges so as to cut the wires insulation, said sleeve drawing said wire along said groove upon further forward movement thereof with respect to said bit to part said insulation and to draw the wires bared conductor along said groove into position for application to a terminal received in said recess upon rotation of said bit.

8. A tool for preparing and connecting an insulated Wire to a terminal comprising, in combination, a body housing a motor, a bit for winding the wire about the terminal and comprising a generally cylindrical member journaled for rotation in said body and drivingly connected to said motor, said bit having an internal terminal receiving recess in the outer end thereof and having a wire receiving groove in its peripheral surface adjacent the outer end thereof, a sleeve disposed about said bit and mounted for relative longitudinal movement with respect thereto, means for moving said bit longitudinally with respect to said sleeve between a retracted position wherein the forward end of said bit and its wire receiving groove are exposed and a forward position wherein the forwardend of said sleeve traverses the ltl forward end of said bit and wire receiving groove, and means mounted on said sleeve and said bit and operative during forward longitudinal movement of said sleeve with respect to said bit for cutting said wire to a predetermined length, said sleeve being arranged to engage said wire during its forward movement to move said wire toward and along said groove, and said sleeve and said bit cooperating during forward movement of the former with respect to the latter both to cut and to part the wires insulation and additionally to position the wires bared conductor for application to a terminal received in said recess.

9. In a tool for preparing and applying an insulated wire to a terminal, the combination comprising a rotary bit having a terminal receiving recess in its forward end and having an elongated longitudinally disposed wire receiving groove in the peripheral surface of its outer end portion corresponding in width to the conductor of the wire, said bit being transversely relieved to define the inner end of said groove and toprovide the same with sharp rear edges, a sleeve mounted for longitudinal movement with respect to said bit between a retracted position wherein the forward end portion of the bit is exposed and a forward position with the forward end of the sleeve traversing the forward end portion of the bit during such movement, said bit having a guide surface thereon adjacent the rear end of said groove which surface is exposed when said sleeve is in its retracted position to receive a wire laid thereacross, the forward end of said sleeve being engageable with the wire during its forward longitudinal movement and coacting with said guide surface to direct the wire into the .rear end of said groove and to urge the wires insulation against the sharp groove edges so as to cut the insulation, said groove edges holding the severed insulation portion against movement with the wire as the wire is moved forwardly along said groove by said sleeve whereby to bare the wires conductor for intimate engagement with a terminal received in said recess upon rotation of said bit.

References Cited inthe file of this patent UNITED STATES PATENTS 2,682,063 Miloche June 29, 1954

Images