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Publication numberUS3523351 A
Publication typeGrant
Publication dateAug 11, 1970
Filing dateOct 20, 1967
Priority dateOct 20, 1967
Publication numberUS 3523351 A, US 3523351A, US-A-3523351, US3523351 A, US3523351A
InventorsFilia George J
Original AssigneeSargent & Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Locator and holder in a crimping tool for an electrical connector
US 3523351 A
Abstract  available in
Images(4)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Aug. 11, 1970 G. FILM 3,523,351

'LOCATOR AND HOLDER IN A CRIMPING TOOL FOR AN Filed Oct. 20, 1967 ELECTRICAL 4 Sheets-Sheet 1 INVENTOR. 650K966 J F m 5. fiowel Au l 19 g 1 70 G. J. FILlA LOCA'I'OH AND HOLDER IN A CRIMPING TOOL FOR AN ELECTRICAL conunc'ron 4 Shets sheet 2 Filed Oct. 20, 1967 IN VEN TOR. 650265 .1 FM /4 Abram/v5 Y Aug. 11, 1970 G.'J. FILIA 3,523,351

LOCATOR AND HOLDER IN A CRIMPING TOOL FOR AN ELECTRICAL CONNECTOR 4 sheets sheet 5 Filed Oct. 20, 1967 FIG.6O.

mvmwon GEORGE J. FILIA ATTORNEY Aug. 11, 1910 LOCATOR AND HOLDER IN A CRIMPING TOOL FOR AN ELECTRICAL CONNECTOR Filed Oct. 20, 1967 G. J. FILIA 4 SheetsSheet 4 IN VEN TOR. GEORGE J, F7; /4

" ,a M fadl United States Patent 3,523,351 LOCATOR AND HOLDER IN A CRIMPING TOOL FOR AN ELECTRICAL CONNECTOR George 'J. Filia, Shelton, Conn., assignor to Sargent &

Company, New Haven, Conn., a corporation of Delaware Filed Oct. 20, 1967, Ser. No. 676,905 Int. Cl. B25b 25/00; H011 /10; BZld 9/08 US. Cl. 29203 8 Claims ABSTRACT OF THE DISCLOSURE This disclosure relates to a work locator and holder in a crimping tool for an electrical connector, which tool is of the hand type having cooperating fixed and movable crimping dies. The locator and holder for the electrical connector is mounted on the tool body for sliding movement toward and away from the fixed die and is spring biased to the former position. This slide serves to engage and axially position with reference to the dies a connector or terminal of the ferrule type to be crimped about a wire. It also angularly positions the connector with reference to the dies and serves as a wire stop.

This invention relates to a locator and holder for an electrical terminal or connector for crimping of the latter about a wire by a hand tool with which the locator and holder is associated and supported. Such crimping tools commonly comprise a body supporting in fixed relation thereto a crimping die and providing as a part thereof a handle member. The aforementioned body also supports for sliding movement a second die cooperating with the first-mentioned die and movable toward and away from the latter by relative swinging movement of a second handle member to the first handle member, the second handle member having a pivotal relationship to the body and operative means of connection to the second die. These tools are often employed for crimping a terminal or connector, of the ferrule type having a protruding tongue portion, about an insulated or uninsnlated wire conductor.

Heretofore in the use of such tools considerable difficulty has been encountered in forming by a crimping operation a strong electrical and mechanical connection between the terminal and the wire owing to improper positioning and/or holding of the terminal by an operator with reference to the crimping dies prior to a crimping operation. The barrel portion of such a connector, which may be open ended, must be properly positioned and held with reference to the dies axially thereof. It is also necessary in many such tools to angularly orientate the terminal so that the protruding tongue thereof has a particular angular relationship with reference to the dies before a crimping operation.

The terminal should be placed intermediate the open dies in a manner such that the portion of the barrel from which the tongue protrudes is backed by the fixed die so as to give it solid support, and it is desirable to hold the terminal in these axial and angular positions prior to a crimping operation. It is also desirable to provide, in the locator and holder, means to stop a wire inserted into the open-ended terminal so that the wire will be extended sufficiently into the terminal but not too far, to assure best electrical results in the crimped product.

Known work locators for such tools have in the past been subject to a variety of shortcomings when employed for crimping terminals of the type described above. For example, such locators have failed to effectively inhibit the improper positioning by an operator of such a terminal between jaws of a crimping tool. In at least some instances it has been found that in the use of such locators it has been somewhat difficult for the operator to position the terminal in the jaws for a crimping operation. Some tools equipped with locators have lacked simple, efl ective means to axially and angularly orientate a terminal with reference to the crimping dies and axially orientate a wire in the terminal, and at least some have lacked effective means to hold a terminal in proper position prior to a crimping operation. Moreover, at least some devices of the prior art, such as described above, have inadequately provided for elongation of such a terminal upon compression thereof during a crimping operation.

One object of the invention is to provide a terminal or connector locator which inhibits improper positioning by an operator of a terminal such as described between the jaws of a crimping tool.

Another object is to provide a locator which axially orientates such a terminal and tends to also angularly orientate it.

Another object is to provide a locator such as described which very effectively holds the terminal in proper position for a crimping operation.

Still another object is to provide a locator and holder such as described above which is of simplified construction and dependable in operation, which also serves as a wire stop and which readily permits elongation of the barrel portion of such terminal for crimping of the latter between the dies of the tool.

Further objects of the invention will be apparent from the following detailed description of one form of the terminal locator and holder.

In the drawings:

FIG. 1 is a side elevational view illustrating a hand tool equipped with a locator and holder for an electrical connector, embodying the invention;

FIG. 2 is a fragmentary plan view of the head portion of the tool illustrating a terminal and the locator and holder therefor in one position thereof;

FIG. 3 is a similar view showing the locator and holder in another position thereof and showing a wire inserted in the terminal;

FIG. 4- is a sectional view taken on line 4-4 of FIG. 1;

FIG. 5 is a side elevational view of the tool of FIG. 1 illustrating the parts thereof with the handles of the tool in closed condition, as upon the completion of a crimping operation, the work being omitted;

FIG. 6 is a top plan view of the tool in the last-mentioned condition;

FIG. 6a is a fragmentary enlarged view, similar to FIG. 6, illustrating exaggeratedly the deflection of a head portion and a resilient portion of the locator on crimping of a terminal,

FIG. 6b is a fragmentary view illustrating a crimped terminal or connector;

FIG. 7 is a fragmentary side elevational view of the tool in the last-mentioned condition illustrating the side thereof remote from that shown in FIG. 5;)

FIG. 8 is a fragmentary top plan view of the crimping tool illustrating the dies thereof in open position subsequent to a crimping operation, and further illustrating the removal of the crimped connector therefrom;

FIG. 9 is a side elevational view of the tool similar to FIG. 1, illustrating the same in the last-mentioned condition; and

FIG. 10 is an enlarged sectional view taken on line 1010 of FIG. 7.

In the drawings the elongated body of the tool, indicated generally at 10, is provided with a crimping head portion 11. The body is provided with an element 12 extending from the end thereof remote from the head 11 to provide a handle member 13. The element 12, while shown as secured to the body by fastening means, may be considered for present purposes as an integral part of the body as it may be so formed.

The head 11 is illustrated as provided with a transverse recess 14 in which crimping dies 15 and 16 are located. Die 15 is fixed to the head 11 by any suitable means, and die 16 is fixed to one end of a ram 17 slidably supported in the body for movement toward and away from the die 15 for cooperation of these dies with one another. When the die 16 is retracted in the body by the ram, opening of the dies is effected, and when it is moved in the opposite direction the dies are closed to effect a crimping operation.

The tool is provided with a handle member 18 in pivotal relation to the body 10 and has operative means of connection to the ram 17 to effect opening and closing of the dies. A further description of the details of the above-mentioned parts of the tool and their cooperation with one another is unnecessary to an understanding of the of the present invention as the above-described tool may be similar to that illustrated and described in U.S. Pat. No. 3,322,008, issued May 30, 1967.

The terminal or connector locator and holder of the invention is indicated generally at 19. It comprises an elongated relatively thin steel body 20 capable of flexing in a manner to be described hereinafter. It lies generally in a plane lengthwise of the tool body 10 along one side thereof. One end portion of the body 20 is laterally and outwardly bent (FIG. 3) with reference to the tool body 10 to provide an abutment or operating member 21 for finger control, as will be explained hereinafter.

Intermediate of its ends it has a lug 22 struck therefrom laterally and inwardly with reference to the body 10. A longitudinal slot 23 (FIG. 7) is formed in the body 20 intermediate the other end thereof and the lug 22.

The last-mentioned end of the body 20 has thereon the head 24 of the locator and holder, which head in the illustrated form of the invention is formed as a separate piece. It may be cast from a suitable metal to provide the stepped configuration shown in FIGS. 2 and 6 of the drawings, for example. The head 24, which may be secured to the body 20 of the locating and holding device by fasteners indicated at 25, has in opposing relation to the transverse opening 14 in the head 11 of the tool planar stepped surfaces 26 and 27 parallel to one another, the surface 26 being disposed laterally inwardly with reference to the tool body 10 from the surface 27. The distal end of the head 24 of the locator and holder is provided with a surface 28 of planar form disposed at right angles to the adjoining surface 27.

The aforementioned body 20 of the locator and holder is supported in part for longitudinal sliding movement by a bolt 29 having a head preferably provided with a hexagonal socket for reception of a suitable wrench. The bolt extends through the slot 23 in the body and is threaded into a tapped hole in the body 10 of the tool. A washer 30 is interposed between the head of the bolt and the body 20 of the locator and holder to provide support for the body 20 while permitting free sliding movement with reference thereto.

The body 20 of the locator and holder is also supported in part and is guided by the aforementioned lug 22 thereof which extends into a longitudinal groove 31 (FIG. 10) in the body 10. This groove, while permitting sliding movement of the lug 22 in a lengthwise direction, guides with the bolt 29 the movement of the body 20 so that angular movement of the body about the axis of the bolt is effectively inhibited. Interposed between one end of the groove 31 and the lug 22 is a compression spring 31 acting to urge the body or slide 20 in a direction toward the head 11 of the tool or, in other words, toward the fixed die 15 thereof. The bolt 29 may be effective to limit this sliding movement. It will be noted that in the position of the locator and holder shown in FIG. 3 the head surface 26 lies in a plane parallel to but spaced somewhat from the plane in which the adjacent end of the die 15 is located.

An electrical terminal or connector of one type adapted to be crimped in the tool is indicated generally at 32., as best shown in FIG. 2. It comprises a ferrulelike part 33 serving as an electrical conductor which may have an outer covering of insulating material and which has extending from one end thereof a tongue 33 adapted to be secured to another conductor such as a binding post. It will be noted that the tongue 33 projects from one side wall portion of the ferrule 0r barrellike part 33 of the electrical connector. For crimping purposes the lastnamed portion of the terminal should be strongly backed by the fixed die 15 which has sometimes been referred to in the trade as a mold.

As previously mentioned, the terminal locator and holder may be employed to crimp a terminal on either an insulated or uninsulated wire. In the use of the tool illustrated in the drawings, the wire conductor 34 (FIG. 3) is provided with an insulating cover 35 which for a crimped connection of the conductor with the terminal is stripped back a distance from the end of the conductor wire. The die configuration and arrangement in the tool is such that when these dies are closed for a crimping operation, the insulated barrel of the terminal is crimped to the wire insulation to form a physical connection therewith and the barrel 33 is crimped to form a strong physical and electrical connection with the conductor 34.

In the operation of the tool, the dies 15 and 16 are moved from their closed positions to their open positions to receive a wire terminal by relative movement of the handles 13 and 18 of the tool from the positions of FIG. 5 to the positions of FIG. 1. A terminal may then be inserted in the tool in the manner best shown in FIG. 2. When the terminal is properly inserted in the tool the handles 13 and 18 of the tool may be moved a distance toward their closed positions of FIG. 5 from their positions of FIG. 1 so that the terminal is lightly gripped by the dies. The toolmay be equipped with a motion-compelling device as shown and described in the aforementioned U.S. Pat. 3,322,008 to prevent opening of the dies thereafter until the dies have been moved, through movement of the tool handles, to their closed postions. As shown in FIG. 2, the terminal locator and holder is partially retracted for insertion of the terminal 32 in the tool by exerting finger pressure as indicated on the lug 21 of the body 20. It may be retracted a distance only sufficient to clear the tongue 33* of the connector as it is inserted in the tool. It may then be released.

In released position, the surface 26 of the terminal 10- cator and holder provides an abutment acting as a stop engageable by the barrel 33 of the terminal at the end thereof corresponding to the tongue 33*, as shown in FIG. 3. This axially orientates the terminal. Also when the terminal locator and holder is released, the end surface 28 thereof engages the tongue 33 of the terminal in a manner to press the terminal firmly against the die or mold 15 with the tongue in the vertical position shown in FIG. 3, so that the portion of the terminal barrel from which the tongue protrudes is angularly aligned with the mold 15 and next thereto. This is very important to effect correct crimping of the terminal. The surface 26 of the locator engaged with the barrel of the terminal facilities this action of the locator on the tongue 33 for the lastmentioned purpose.

The terminal is angularly oriented by the engagement of the end surface 28 of the locator with the tongue 33 If the terminal is inserted in a tool, as is often the case, with the tongue 33 not in the true vertical position shown in FIG. 2 but cocked either toward the mold 15 or the die 16, the action of the locator head 24 is such that the terminal is moved angularly so that the tongue 33 is straightened up to the position of FIG. 2. If the operator attempts to insert the terminal in the tool with the tongue 33 of the terminal nearest the die 16 instead of its proper position shown in FIG. 2, the spring-biased terminal locator and holder acting on the tongue 33 of the terminal cocks the terminal in such a manner as to indicate to the operator that the terminal is improperly positioned in the tool.

After the terminal is positioned and held in the tool as aforesaid, the aforementioned wire is inserted in the terminal as shown in FIG. 3. The surface 27 of the head of the terminal locator and holder acts as a stop for the wire conductor 34, as shown in FIG. 3. The location of the work with reference to the die or mold 15 is also shown to advantage in FIG. 4.

When the parts are assembled as aforesaid, the handles 13 and 18 of the tool may be swung from their open positions of FIG. 1 to the closed positions of FIG. 5 to effect closing of the crimping dies 1-5 and 16 on the Work, performing a crimping operation. During this operation the barrel of the terminal may be somewhat elongated and, owing to the flexibility of the body 19 of the terminal locator and holder, the terminal-abutting head 24 of the locator is moved slightly to the right as viewed in FIG. 6, permitting this elongation The closed condition of the dies on the work is illustrated in FIG. 6. After the work has been crimped, as shown in the last-mentioned view, the dies may be opened for the removal of the work upon the return movement of the handles of the tool to their open positions illustrated in FIG. 9. Upon retraction of the die 16 on the plunger 17, the spring-biased locator bearing on the tongue of the connector or terminal, as shown in FIG. 8, in the direction of the arrow tends to strip the work from the die 16 while manual pressure on the wire in the opposite direction shown by the arrow may conveniently strip the work from the die 15. In this manner the work may be easily removed from the dies and from the tool. Removal of the work from the tool does not require the locator to be manually retracted by finger pressure on the lug 21. The work may be freed merely by grasping the wire and pulling it with the work out of the tool. It is to be noted that the work locator and holder may be employed on suitable tools for crimping terminals other than the type illustrated and described above. For example, as viewed broadly, the terminal shown and described is of the type having a barrel and an axial projection therefrom and the work locator and holder may coact with such a terminal so as to bear against the last-mentioned projection and align the barrel of the terminal.

It will thus be seen that the terminal locator and bolder attains the stated objects. It is very eflicient and reliable in operation. Obviously the spring associated with the locator and holder may be selected to exert the desired degree of pressure on the work when the locator and holder is in the released condition thereof. In at least many instances the spring pressure may be relatively light to facilitate retraction of the work locator and holder.

While only one form of the locator and holder in a crimping tool for an electrical connector has been illustrated and described, it will be apparent to those versed in the art that the invention may take other forms and is susceptible of various changes in details Without departing from the principles of the invention and the scope of the appended claims.

What I claim is:

1. In combination with a hand tool for crimping to a wire a terminal having a barrel portion and an axial projection therefrom, which tool has an elongated diesupporting body having a first side which is a wirereceiving side and a second side, a first die fixed to said body and a second die movably supported for cooperation with the first die, a terminal locator and holder comprising a slide mounted externally on said body for movement past the second die in a direction toward the transverse plane in which at least a portion of the working face of the first die is located, a spring interposed between the body and the slide urging the latter in the last-mentioned direction, means by which the slide may be retracted by manipulation thereof for insertion of a terminal intermediate the dies, the slide having at one end a head pro vided with a projecting end portion for engagement with said axial projection of the terminal to align and hold the latter with reference to the first die, and also having a portion engageable with the corresponding end of the barrel to axially orientate the terminal inserted in the tool, and the slide having a resilient portion supporting the head permitting said head and said resilient portion to be deflected transversely of the longitudinal axis of the tool body in a direction away from said second side during a crimping operation on elongation of the terminal barrel as it is crimped.

2. The combination of claim 1 wherein said resilient portion of the slide is formed by a relatively thin strip of steel extending lengthwise of the body of the tool and constituting the body of the slide.

3. The combination of claim 1 wherein said means for retracting the slide comprises a manually operable member fixed thereto at the end thereof remote from said head.

4. The combination of claim 2 wherein said slide has sliding engagement with an external surface of the tool body and wherein the slide is provided with a longitudinal slot through which a headed fastener extends into the tool body to support and permit said movement of the slide.

5. The combination of claim 4 wherein the body at a location remote from said head is provided with a laterally outwardly extending manipulating member constituting said means for retracting the slide.

6. The combination of claim 5 wherein the body of the slide is provided with a laterally inwardly extending lug, the lug extending into means defining a groove in the body coacting with the lug to guide said movement of the slide and inhibit angular dislocation of the slide about an axis transverse thereof.

7. The combination of claim 6 wherein said spring is of the compression type and is interposed between one end of the means defining said groove in the body and said lug.

8. The combination of claim 7 wherein the axial projection of the terminal comprises a platelike tongue and wherein said head of the locator and holder is a separate part wider than the striplike body and secured to one end of the latter, the head having an axially offset planar surface engageable with the corresponding end of the terminal barrel to axially align the terminal, and having a second planar surface laterally offset outwardly with respect to the first-mentioned surface thereof providing a wire stop, and wherein the distal end of the head provides a planar surface transverse to the first and second planar surfaces thereof, engageable with the platelike tongue of the terminal to angularly orientate the terminal.

References Cited UNITED STATES PATENTS 2,829,549 4/1958 Demler 29203 2,539,185 9/1960 Lazar 29203 2,969,701 1/1961 Hasenkamp 269--96 3,118,486 1/1964 Radocy 72-410 3,281,926 11/ 1966 Frastaci 29203 3,322,008 5/1967 Filia 81313 3,328,872 7/1967 Reem 29203 3,420,086 1/ 1969 Long 29203 3,402,452 9/ 1968 Mraz 29282 X WAYNE A. MORSE, 1a., Primary Examiner U.S. Cl. X.R.

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Classifications
U.S. Classification29/751, 72/409.14, 81/420, 72/466.6, 29/282, 269/96, 29/281.5
International ClassificationH01R43/04, H01R43/042
Cooperative ClassificationH01R43/042
European ClassificationH01R43/042
Legal Events
DateCodeEventDescription
May 28, 1987AS02Assignment of assignor's interest
Owner name: ROSTRA TOOL COMPANY, 18 MAYFLOWER PARKWAY, WESTPOR
Effective date: 19870430
Owner name: SARGENT MANUFACTURING COMPANY, A DE CORP
May 28, 1987ASAssignment
Owner name: ROSTRA TOOL COMPANY, 18 MAYFLOWER PARKWAY, WESTPOR
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SARGENT MANUFACTURING COMPANY, A DE CORP;REEL/FRAME:004725/0436
Effective date: 19870430
Jul 14, 1986ASAssignment
Owner name: KIDDE, INC.
Free format text: CHANGE OF NAME;ASSIGNOR:WALTER KIDDE & COMPANY, INC.;REEL/FRAME:004589/0612
Effective date: 19820830
Owner name: SARGENT MANUFACTURING COMPANY, 100 SARGENT DRIVE,
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KIDDE, INC., A CORP. OF DE.;REEL/FRAME:004589/0616
Effective date: 19860206
Jul 14, 1986AS02Assignment of assignor's interest
Owner name: KIDDE, INC., A CORP. OF DE.
Owner name: SARGENT MANUFACTURING COMPANY, 100 SARGENT DRIVE,
Effective date: 19860206
Jul 14, 1986AS01Change of name
Owner name: KIDDE, INC.
Owner name: WALTER KIDDE & COMPANY, INC.
Effective date: 19820830
Sep 27, 1982ASAssignment
Owner name: KIDDE, INC.
Free format text: CHANGE OF NAME;ASSIGNOR:WALTER KIDDE & COMPANY, INC.;REEL/FRAME:004056/0845
Effective date: 19820830
Owner name: KIDDE, INC., NEW YORK