US2743502A - Wire connecting tool - Google Patents

Description

May 1, 1956 Filed June 30 1951 FIG/ F. RECK WIRE CONNECTING TOOL 4 Sheets-Sheet l ATTORNEY May 1, 1956 F. RECK WIRE CONNECTING TOOL 4 Sheets-Sheet 2 Filed June 50, 1951 INVENTOR F. RECK a C 7 4W ATTORNEY May 1, 1956 F. RECK 2,743,502

WIRE CONNECTING TOOL Filed June so, 1951 4 Sheets-Sheet 3 /Nl ENTOR F RECK L) NW A T TORNE V May 1, 1956 F. RECK 2,743,502

WIRE CONNECTING TOOL.

Filed June 30, 1951 4 Sheets-Sheet 4 FIG/ 55 5s 27 Q h L Wampum-m INVEN 70/? F. RE C K A T TORNE V This invention relates to tools formaking wire conmotions and more particularly to hand tools for conmeeting wire 'to an electrical terminal, to another wire or :to a "like conductor. 1 I

Methods at :present used for securing a wire to a tersminal, .for example on a terminal board, are laborious,

time consuming, requireaplurality of tools, and involve amu'ltiplicity :of operations. For example, in making one type of connection, the wire is drawn from a storage spool and cut to length with a wire cutteryinsulation is then removed from a suitable portion with another tool; and

the stripped end "of the wire is wrapped to the selected terminal. I

Devices such as those disclosed in the application of A. Miloche, Serial No. 752,895, filed June 6, 1947, now Patent 2,655,953, issued October --20, 1953, and the applicatio'nof Hickman-Mallina-Reck, Serial No. 753,066, filed June 6, '1947, now Patent 2,5 85,010 issued February 12, 1952, have been proposed for wrapping a wire about a terminal in such a manner asto afford a solderless con- "nection. separate and distinct steps of cutting the wire to length and stripping the insulation from the end, since these devices require that the noted operations be performed first. l

A wire connecting'tool which *cuts, strips and wraps a connection isdisdosed in the applicat-ion of H. Miloche, Serial No. 23 1,6 11, filed-lime 30, 1951, now Patent 2,682,063, issued June 29, 1954; The tool of the present'invcntio'n is of this type. One "object of this invention is the 'improvem'ent o'f tools for making wire connections, particularly to terminals.

'Another object of this invention is to enable the "perforznanceofthe three steps ofcutting', stripping and wrap- Ipi'ng a wire into a connectionin one substantially continuous operation.

upon and soldered Various "embodiments or this invention include a wit--v in g too-1 having a wiring head comprising" a shaft and a sleeve member on said shaft and adapted for motion relative thereto. A cutting member is mounted on the shaft and cooperates with a portion or the sleeve member Such devices, however, do not eliminate the .ing drawing, in which:

2,743,502 Patented May 1, 1956 2 other embodiment these operations are performed by relative rotation of these two members.

In a further embodiment or this invention, the mutilating means are located suinciently far back frornthe wrapping head or guide 'to'leave an unstripped portion of the wire in'the wrappinghe'ad, whichiportion is first wrapped on the terminal followed by the stripped wire.

In accordance with on 'feamre 'of 'this irivention, "faf single tooljin'cludes means for cutting a wire to length,

means for stripping the insulation from a desired portion of the wire, and means for Wrapping'the wire'on a terminal or on another wire or conductor.

In accordance with another feature of this invention, the cutting, stripping and wrapping means are so mounted and correlated that the cutting and the mutilation of the insulat'ion occur substantially simultaneously and are'followed immedia'tely, if desired, by simultaneous wrapping and stripping of the wire. 4

The above-noted and other objects and features of this invention will be understood more clearly and any from the following detailed description of illustrative embodiments thereof taken in connection with the accompany- Fig 1 is .a perspective'view of a wiring tool illustrative of one embodiment of this invention;

Fig. 2 is an exploded view of operating means, and of the cutting, stripping and wrapping elements which comprise the wiring head of the tool shown in Fig. '1;'. V I Fig. 3 is a perspective view of the wiring head shown in Fig. 2 in an open position, ready torecei ve .a wire;

Fig. 4 is a perspective view of the wiring head .of Fig. ,2 with a wire positioned therein;

Fig. 5 is a perspective view showing the wiring head seated on a terminal and actua'tedlso that the wire is cut to length and the insulation mutilated.

Fig. '6 is a perspective view of the wiring head showing I the wire with the insulation about a terminal; s A, y

Fig. 7 is a perspective view similar to Fig. 6 but with a d'ifierent wrapping head thatwprovides for wrapping a stripped therefrom, wrapped portion of insulated wire on a terminal;

Fig. 1 with parts broken away to show internal mechanisms; I v 1 Fig. 9 is an elevational view similar .to Fig. 8 but showing another operating means; Fig. 1.0 :is a perspective view of, atool similar in many respects to that of Fig. 1 but having a diflerent wiring head; ,parts of the operating mechanism being broken to cut a properly inserted wir as the'sleeive is moved relative to the shaft. ,Othercooperating-elementsmounted re'spe'c'tively on the shaft and sleeve serve to mutilate the insulation of the 'wire so that :it may be skinned or axial movement between the "sleeve and shaftyand in anway;

Fig. l -l :is an elevational view of the wiring head of the toolof Fig. 10 with parts broken away to show internal details; and

Figs. 1 2, 13 and 14 are end views of the operating head of Figs. 10 and 11, respectively in open, intermediate, and closed or operatingpositions. a

Referring to Figs. 1 and '8 of the drawings, the wiring tool illustrated comprises a housing 10 with a handle 11 and having mounted thereon a wiring head 12, an operating lever or handle 13, and a motive means controlling trigger or button 14. -Within the housing is a motor, not shown, a clutch 15 with suitable elutch' 'opera'ting means, gearing for making connection .to a shafit 16 and indexing means for stopping the shafit at a @desired home position. A similar motor, clutch, gearing and indexing assembly in disclosed and fully described in the applicaitionzof F. iReckQSerial No. 15,834, filed 'Maro'hl'9, 1948, now Patent 2549,1 21, issued August 1 8, 1953.- Within the handle 11 is a switch 17 which is operated in an obviohrmanner irom the motive control means or' trigger 14. The spring and plunger assembly 18 mounted onv Fig. 8 is an elevational view of the device shown-in the housing 10, cooperates with the adjustable screw 19 on the lever 13 in a manner and for a purpose to be later described.

, Referring also to Fig. 2 along with Figs. 1 and .8, the shaft 16 has a sliding fit within a sleeve 20. The sleeve 20 is provided with an enlarged portion 21 and a reduced portion 22. A cross-head 23 fits over the sleeve 20 against the shoulder of the enlarged portion 21 and is held in place by a washer 24 fitting over and secured to the reduced portion 22 of the sleeve, 20. The pins 25' of cross-head 23 cooperate with notches 26 of lever 13 to impart longitudinal motion to the sleeve 20. The lever 13 is pivoted on the bracket 27 which is suitably secured to the housing 10.

The shaft 16 is provided with an enlarged portion 28 which is notched at 29 to cooperate with end portion 30 of the sleeve 20 to act as a wire wrapping head or guide. The head 28 is also provided with an axial orifice 31 for fitting over a terminal, or a wire, or other conductor on which the wrapped connection is to be made. The face 32 of the notch 29 in the head 28 cooperates with the beveled portion 33 of sleeve 20 to form a wire crushing or mutilating means. The mating faces of 32 and 33 may be longitudinally grooved. A key element 34 is secured in the slot 35 of shaft 16 through the slot 36 of the sleeve 20 after the shaft and sleeve are assembled. The key 34 may be held in the slot 35 by means of wedges, a force fit or other suitable means. A lug 37 on the key 34 cooperates with the slot 36 on the sleeve 20 to prevent relative rotation of the shaft 16 and the sleeve 20. A shearing member 38 on the key 34 cooperates with a shoulder 39 on the sleeve 20 to provide a wire cutter.

With the lever 13 in the position shown in Figs. 1 and 8, the wiring head .12 is in the condition shown in Figs. 3 and 4. Fig. 3 shows the head ready to receive a wire and Fig. 4 shows the head with a Wire 40 inserted therein ready for cutting and mutilation of the insulation. When the lever 13 is pulled back toward the handle 11, the sleeve 20 slides longitudinally on the shaft 16 to shear the wire between the member 38 and the shoulder 39, and at the same time to crush the insulation between the face 32 of the notch 29 and the beveled portion 33 of the sleeve 20. This condition is shown in Fig.

wherein the insertion of a terminal 41 into the tool is also shown. Inward pressure on the button 14 operates to mesh the clutch and close the switch 17 to operate the motor to drive the shaft 16. Simultaneous rotation of the shaft 16 and sleeve wraps the stripped portion of the wire 40 on theterminal 41 stripping it out of the insulation 42 which is retained in the crushing or mutilating means. Although only a short section of wire 40 is illustrated, it will be obvious that the length of this wire will in practice be sufficient to reach to another terminal, either relatively close to terminal 41 or at a distance via wire guides, ducts, etc. If an initial connection is being made, the wire 40 may come from a storage spool. The stripping 42 will drop free when the tool is prepared for the next wiring operation.

Good practice dictates that the lever 13 be moved slightly away from the handle 11 before button 14 is pressed in order that there will not be too great pressure on the crushing jaws, which may result in breaking of the wire during the stripping operation. The spring and plunger assembly 18 against which the lever 13 is operated aids the operator in attaining a slight easing-off which is just sufficient for the purpose. By adjusting the screw 19 in its mounting on the lever 13, so that there is a gap between the point of 19 and the plunger head of assembly 18, when the lever 13 is in a fully outward position, the biasing effect of 18 may bemade just sufficient to provide the required easing-off of lever 13. Thus the crushing jaws are slightly relaxed, retaining their grip on'the insulation, but relieving the pressure on the wire so that it may be freely pulled out of the insulation, withou breaking the wire.

The easing-off" operation may also be accomplished, if desired, by using a mechanism such as shown in Fig. 9. In this embodiment, a leve r 44 is pivoted with the lever 13 on the bracket 27 and operates a secondary lever 45 pivoted on the housing, by Way of a link 46. The sec ondary lever 45 is provided with a cam surface 47 which cooperates with a surface of the lever 13 to move this lever the slight necessary distance away from the handle 11 to attain the easing-off, when lever 44 is pressed to operate the motor and clutch.

If it is desired to include a-portion of insulated wire in the wrapping on a terminal such as 41, this may be done by means disclosed in Fig. 7. Here the wrapping head or guide 43 whichv corresponds to the wrapping head 28 of Figs. 1 to 6, inclusive, is made deeper, that is greater in longitudinal length, than 28, so that the portion of insulation mutilated is further from the point of wrapping. Thus a small portion of insulation included in the head 48 is first wrapped on the terminal followed by the uninsulated wire.

In the operation of a device of this type the wiring tool is most conveniently-held in the right hand and the wire manipulated with the left hand. In a typical operation the wire is inserted in the tool and the operating lever depressed snfiiciently to retain the wire therein but not enough to either cut the wire or to crush the insulation. The axial orifice on the end of the shaft is then applied to a terminal, and the wire is properly dressed with the'left hand. The operating lever is then fully depressed to cut the wire to length and to mutilate the insulation. Now operation of the motor control button or trigger rotates the shaft and sleeve simultaneously to wrap the wire on the terminal. and to strip the insulation therefrom as it is drawn through the stripping means. As has been previously noted if the tool is equipped with the crushing type of insulation mutilating means a slight easing of the pressure on the operating lever is desirable before wrapping in order that the wire will not be broken.

In Figs. 10 to 14, inclusive, are shown several views of a modified wiring tool in which the sleeve 50 and the shaft 51 of the wiring head operate by relative rotation rather than by relative longitudinal movement. The parts whichare the same as those of the device of Figs. 1 to 6, inclusive are designated by the same reference characters.

The cross-head 23, which is moved axially by the lever 13 as in the other modifications, imparts axial movement to the camming member 53 through thering 52 and the bearing 54. The member 53 is splined to shaft 51 limiting it to axial motion relative thereto. Spiral slots 55 in the member 53 bear on screws 56 which are threaded into a head 57 on the sleeve 50. The sleeve 50 is prevented frorn axial movement with respect to the shaft 51 by means of a spring washer 58 which is retained in a peripheral groove in shaft 57 by a retaining member 59 threaded into the head 57. Thus axial movement of the camming member 53 imparts rotational movement to the sleeve 50. Since the camming member 53 is prevented from rotational movement with respect to the shaft 51, thesleeve 50 is also rotated with respect to the shaft 51. A cutter sleeve 61, secured to the main sleeve 50 by a screw or other suitable means, is provided with a cutting edge 62 which cooperates with a mating edge of a cutter member 63 secured to the shaft 51. The cutter member 63 may be secured in a groove in the shaft 51 by any suitable means such as by wedges or a force fit.

. The outer end of shaft 51 is provided with an orifice 64 for receiving a wiring terminal such as 65. The outer end of the orifice 64 is counterbored at 66 for a purpose to be described. The outer ends of sleeve 50 and of shaft 51 are provided with cooperative means for guiding the wire during. wrapping and for cutting or mutilating and stripping theinsulation; As may be seen in Figs. 12, 1 3 and 14 the end of the shaft 51 is slotted adjacent the counterbore 66 and is provided with a hook or projection '67, and with a halfJfiShofzaicutting and-: st1ipping: die 68. The sleeve 50 which is? notched $10. cooperate with the projection 67 on shaft 51 carries the -ot'her. half 68b of the cutting and stripping dief68.1..Thusawire being drawn from the die..6 8 pas.ses"into;:the counterbored portion 66 of shaft 51 which aids in guiding the wire during wrapping around a terminal inserted in the axial orifice 64. I

In the operation of device, a w re is placed in the wiring head between the mating port-ions 68aand 68b of the die 68 and the cutters 62, 63,,and the- 'handle 1 3 operated for a sufiicient distance to h'ng the projection 67 to the position shown in- 'gi Theft'oolmay then 'be moved around toap tion and applied to a terminal such as 65;"'al-lowi g e wireftd'slide freely in the tool. The lever '1'3.is "their operatedgto, a fully depressed position which closes theid'ie halves 68a and 68b around the wire, their position being that shown in Fig. 14. This die is so proportioned that the cutting means 68 will cut through the insulation without damaging the wire. The button or trigger 1 4 is then pressed to operate the clutch and the motor, turning "the sleeve 50 and the shaft 51 simultaneously to wrap the wire on the terminal 65, strippingit as it is drawn out of. the head. As the endof the wrap is approached= 'the final portion of the wire is drawn into'th'e couuterbore 66' which is dimensioned so that it aids in closely wrapping the wire end on the terminal. Since this cutting type of wire mutil'ating means does not put any appreciable pressure on the wire itself, it is not necessary to ease off on the handle 13 duringth'e wrapping and stripping operations.

Although this type of wiring'tool is particularly adapted for cutting and stripping 'a wire as well as wrapping it on a terminal, it may obviously be used withja wire which is already stripped and cut. to length, since the cutting and insulation multilating means'will in such a case be inoperative. Moreover, although this .thol is partlcular-ly adapted for wrapping a wire on a suitable-terminal in such a manner that no soldering is required, may also be used for wrapping wires which are to hesoldered.

Although the foregoing description has dealt primarily with the wrapping of a wire on a terminal, this type of tool may also be used for connecting two wires together. Ordinarily in this case one wire will be somewhat larger than the other with the larger wire serving asithe terminal and the smaller wire as the wrapped element.

What is claimed is: j

l. A wiring tool for cutting and stripping an insulated wire, and for wrapping a portion thereof on a termina'l,

that comprises a shaft, and'a sleeve mounted thereon for t relative movement with respect thereto, said shaft having on one end a notched projection, one notch face thereof comprising part of 'a wrapping head, a portion of said face comprising the shaft part of an insulation mutilating means, and an edged projection spaced from said end comprising part of a wire cutting means; and the sleeve having on the corresponding end a shoulder opposite said notch faceand defining therewith a wrapping head, a portion of the sleeve adjacent the shoulder, op-

posite said shaft parent the mutilating means and defining therewith insulating, m-util'at-in-g and stripping means, and a shouldered slot spaced from said sleeve end, opposite the edged projection and defining therewith the wire cutting means; means for imparting relative movement to said shaft and sleeve to allow the insertion of aninsulated wire in said device and also for imparting different relative movement to said shaft and sleeve for simultaneously cuttingthe wire, mutilating the insulation preparatory to stripping, and securing the wire in the winding head, a motor, and means for connecting said motor to rotate said shaft and sleeve for simultaneously stripping the wire and wrapping a portion fllereof on a terminal.

2. A wiring tool for cutting and stripping a'wire,land

for wrapping a portion thereof on a terminal, that comprises 'ashaft, and a sleeve mounted thereon for longitudinal movement with respect thereto, said shaft having on one end a notched projection, one notch face thereof comprising part of a wrapping head, a portion of said face comprising the shaft part of an insulation mutil-ating means, and an edged projection spaced from said end comprising part of a wire cutting means; and the sleeve having come corresponding end a shoulder opposite said notch face and defining therewith a wrapping head, a portion of the sleeve adjacent the shoulder, opposite said shaft part of the mutilating means and defining therewith insulating, mutilating and stripping means, and a shouldered slot spaced from said sleeve end, opposite: the edged projection 'and defining therewith the wire cutting means; means for imparting relative longitudinal movement to said shaft and sleeve to allow the insertion of an insulated wire in said tool and also for-imparting different relative longitudinal movement to'said shaft and sleeve for simultaneously cutting the wire, mutilating the insulation preparatory to stripping, and securing the wire in the winding head, a motor, and means for connecting said motor to rotate said shaft and sleeve for simultaneously stripping the wire and wrapping a portion thereof on a terminal.

3. A wiring tool for cutting and stripping a Wire, and for wrapping a portion thereof on a terminal, that-comprises a shaft, and a sleeve mounted thereon for rotational movement with respect thereto, said shaft having at one end a hooked, lateral projection comprising part of a wrapping head, a first portion of an insulation cutting die adjacent said lateral projection com-prising part of a stripping means, and an edged projection spaced from said end comprising part of a cutting means; and

opposite said lateral projection and defining therewith the wrapping head, a second portion of an insulation cutting die adjacent said shoulder, opposite said first portion of an insulation cutting die, and defining there with the stripping means, and a shouldered slot spaced from said sleeve end, opposite the edged projection, and defining therewith the cutting means; means for imparting relative rotative movement to said shaft and sleeve to allow the insertion of an insulated wire in said device and also for imparting different relative rotaltive movement to said shaft and sleeve for simultaneously cutting the Wire, mutilating the insulation preparatory to stripping, and securing the Wire in the winding head, a motor, and means for connecting said motor to rotate said shaft and sleeve for simultaneously stripping the wire and wrapping a portion thereof on 'a terminal, v I

Y 4. A wiring tool which cuts, strips, and wraps a stripped portion of an insulated wire on a terminal that comto strip it and to wrap it upon a terminal.

prises a shaft and a sleeve mounted for relative movement with respect thereto, a blade mounted on said. shaft and protruding through an aperture in the sleeve and cooperating with a sharp edge of the aperture to serve as a wire cutter, crushing jaws for mutilating the insulation of a wire comprising mating elements mounted 1 respectively adjacent one end of said shaft and of said sleeve, 'an axial aperture in the end of the shaft for fitting over a terminal, and means for rotating said shaft and sleeve to pull a cut wire through the crushing jaws,

5. A wiring tool for cutting and stripping an insulated wire and for wrapping a portion thereof on a terminal that comprises a housing, a shaft mounted on said housing means, and an edged projecfionspaced from said end com- I prising part'of a wire cutting means; and the sleeve therewith insulating, mutilatin-g and strippin'g rneans, and" a shouldered slot spaced from said sleeve end, opposite the edged projection and defining therewith the wire cutting means; means for imparting relative longitudinal movement to said shaft and sleeve comprising 'a lever pivoted on said housing and means securing one end of said lever'to said sleeve whereby the wire may be cut and a portion of the insulation simultaneously mutilated preparatory 'to stripping, biasing means on the housing for cooperation with said lever, a motor, means for activating said motor, and means for connecting said motor to rotate said shaft and sleeve-for simultaneously stripping the wire and wrapping a portion thereof on a terminal, said activating means cooperating with said biasing means foti'movinfi-eaid lever sufliciently to relieve the pressure-0n siidf insulation crushing means duringwrapping 'and strippingl I l 6:"A' device 'as clainied in claimi in which 'the biasing 1 means comprises-a outlining-element operated by said activating mean I I j ferences Cite din the file of this patent vtitren-smresfmrsms 514,496 J Feb. 13, 1894 95 -454 -.R=ish m --v--.-.- 1910'v 1,034,103 ojgqnt gt Jan.13,191'4 2,407,233 Greer stats-" Sept. 10, 19 46 2,$s5.010

Images