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Publication numberUS2539628 A
Publication typeGrant
Publication dateJan 30, 1951
Filing dateFeb 8, 1947
Priority dateFeb 8, 1947
Publication numberUS 2539628 A, US 2539628A, US-A-2539628, US2539628 A, US2539628A
InventorsKingdon Ralph H
Original AssigneeSquare D Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Solderless connector
US 2539628 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Jane 3%, 19511 R. H. KINGDON 2539 628 SOLDERLESS CONNECTOR Filed Feb. 8, 1947 INVENTOIL Roi ,4 lzz'rr Joiz.

Patented Jan. 30, 1951 SOLDERLESS CONNECTOR Ralph H. Kingdon, Detroit, Mich" assignor to Square D Company, Detroit, Mich., a corporation of Michigan Application February 8, 1947, Serial No. 727,356

7 Claims. 1

This invention relates to a solderless connector for electric conductors in which electric cables are mechanically clamped in electrically conducting relation as distinguished from attachment by means of a solder lug.

An object of the invention is to provide a solderless connector which shall efiectively, mechanically and electrically connect an electric cable to a conducting part with the connector receiving the cable end from the top of the connector rather than through an end opening.

Another object of the invention is the provision of a solderless connector in which a cable end may be inserted from the top in which the top or cover of the connector is hingedly mounted on the body portion thereof so as to pivot into a non-interfering position.

Another object of the invention is the provision of a solderless connector in accordance with the preceding object in which the swinging top or cover has means interlocking with the body portion of the connector to normally retain the cover in place.

Another object of the invention is the provision of a solderless connector in accordance with the two immediately preceding objects in which the cover and opposite sides of the connector are threaded to receive a clamping screw adapted to clamp the electrical conductors against the bottom of the connector.

Other objects and features of the invention will be readily apparent to those skilled in the art from the specification and appended drawing illustrating certain preferred embodiments in which:

Figure l is a top plan view showing a solderless connector according to the present invention.

Figure 2 is a side elevational view of the connector.

Figure 3 is transverse sectional view on the line III-III of Figure 2.

Figure 4 is a longitudinal sectional view on the line IV-IV of Figure 3.

Figure 5 is an elevational view of the connector with the top cover swung into cable inserting position.

Figure 6 is a perspective view 01' one form of conducting strap with which the solderless connector may be associated.

The solderless connector, as shown in the drawings,.is mounted upon an insulating base I and connects an electric circuit cable 2 to a conducting strap 3 which, as specifically shown, forms a terminal of a circuit interrupter and carries a contact 4 adjacent its inner end upon a pressed out portion thereof. The connector comprises a main body portion 5, U-shaped in cross section as shown in Figure 3, within which the strap 3 is disposed. The body portion 5 is mounted on the base I by means of a stud 6 passing through a metallic insert 1 and an opening in the bight of the U-shaped body portion and threaded into the strap 3 as shown in Figures 3 and 4.

A separate top wall 8 for the connector has depending side wall portions 9 and I l embracing the side walls of the main body portion 5. At the back end of the connector, the depending wall portions 8 are individually hinged at l2 to the opposite side walls of the main body portion 5 so as to be swingably mounted. thereon. Adjacent the front end, the depending side walls 9 and H are provided with inwardly extending projections l3 adapted to be received in openings or depressions It in the opposite side walls of the main body portion 5 to normally hold the top 8 in assembled relation.

The opposite interior wall surfaces of the main body portion 5 are threaded at I5 and thetop 8 has a central opening similarly threaded to receive a clamping screw l6 which is thus threadedly engaged with both the side walls of the body portion 5 and the opening in the top 8. The conducting strap 3 has its upper surface within the connector provided with a plurality of upwardly extending projections I'l against which the strands of the cable 2 are pressed to prevent their withdrawal from the connector.

While the connector may be formed of any desired materials, it is preferred to form the main body portion 5 and the clamping screw iii of a metal of relatively high conductivity since these parts serve to carry at least a portion of the current between the cable 2 to the conducting strap 3. While copper is acceptable for th s purpose, in order to increase the strength of the connector, it has been found more desirable to form these parts of bronze or brass.

The top is a non-current carrying part and as it serves structurally to prevent spreading apart of the side walls of the main body portion 5 as well as receiving the screw l6, it is preferably formed of steel or similar material of high strength.

As shown in Figures 1 through 4, the end or the cable 2 is clamped between the screw l6 and strap 3 to mechanically and electrically mount it in the connector. The screw it exerts its mechanical pressure not only through its engagement with the threads [5 is. the opposite side walls of the main body portion 5 of the connector,

but also through its threaded engagement in the steel top 8, with the top maintained on the main body portion of the connector by the hinges l2 and the interengaged projections and recesses 13 and M. In mounting the cable 2 within the connector and particularly in the case of heavy cables which are relatively stiif and resist easy bending and forming operations, the screw [6 is either removed, or withdrawn until it engages only the threads in the top 8, whereupon the top is rotated or swung into the position of Figure to uncover the connector. In this operation the projections l3 are disengaged from the openings or recesses l4 by the natural resiliency of the side walls of the top 8 and/or the side walls of the body portion 5. With the top 8 in the position of Figure 5, the cable end may be laid directly into the connector from the top in the position in which it is to be clamped. Thereafter, the top 8 is returned to its normal position paralleled to the bottom wall of the connector and the screw I6 is advanced inwardly into clamping relation with the cable end.

In the operative position of the screw I6 in which it is in threaded engagement not only with the top 8 but also with the side walls of the main body portion 5, the top is maintained in enclosed position not only by the interengagement of the projections and recesses l3 and H but also through the interconnection of the threaded portions of the top and main body portion by the screw itself.

While the connector has been illustrated with the strap 3 within its walls and serving to mount it in place, it is obvious that the connector may be mounted above the strap by the simple reversal of the positions of the end of the strap 3 and the bottom wall of the connector and, while certain preferred embodiments of the application have been specifically disclosed, it is understood that the invention is not limited thereto, as many variations will be readily apparent to those skilled in the art and the invention is to be given its broadest possible interpretation within the terms of the following claims.

What is claimed is:

1. In a solderless connector for electrically connecting an electric cable, a main body portion of substantially U-shape, a cap portion having depending side walls embracing the side walls of the body portion, means connecting the side walls of said body and cap portions to permit movement of the cap portion to uncover the connector from the top, an opening in said cap portion, and a clamping screw threaded in said opening and in the opposite side walls of the body portion and serving to clamp the end of an electric cable within the connector, said screw connecting the threads in said opening and those in the opposite side walls of the body portion so as to maintain the cap portion in clamping position on the body portion against the clamping force.

2. In a solderless connector for electrically connecting an electric cable, a main body portion of substantially U-shape formed of material of relatively high electrical conductivity, a cap portion formed of a material of relatively high mechanical strength and having depending side walls embracing the side walls of the body portion, means connecting the side walls of said body and cap portions to permit movement of the cap portion to uncover the connector from clamping screw threaded in said opening and in the opposite side walls of the body portion and serving to clamp the end of an electric cable within the connector, said screw connecting the threads in said opening and those in the opposite side walls of the body portion so as to maintain the cap portion in clamping position on the body portion against the clamping force.

3. In a solderless connector for electrically connecting an electric cable, a main body portion of substantially U-shape, a cap portion hingedly mounted on said body portion for swing-- ing movement to uncover the connector from the top, interengaging means at said cap and body portion for normally maintaining the cap in its operative position connecting the opposite side walls of the body portion to prevent spreading thereof, an opening through said cap portion, and a clamping screw threaded in said opening and in the opposite side walls of said body portion for clamping the end of an electric cable within the connector, said screw connecting the threads in said opening and those in the opposite side walls of the body portion so as to maintain the cap portion in clamping position on the body portion against the clamping force.

4. In a solderless connector for electrically connecting an electric cable, a main body portion of substantially U-shape, a cap portion hingedly mounted on said main body portion for swinging movement to uncover the connector from the top, said cap portion having means engaging the opposite side walls ofsaid body portion to prevent spreading thereof when the cap portion is in closed position, an opening through said cap portion, and a clamping screw threaded in said opening and in the opposite side walls of said body portion for clamping the end of an electric cable within the connector.

5. In a solderless connector for electrically connecting an electric cable, a main body portion of substantially U-shape, a cap portion having depending side walls embracing the side walls of the body portion, means hingedly connecting the side walls of the cap and body portions adjacent one end of the. connector to permit swinging of the cap portion to uncover the connector from the top, interengaging means on the side walls of said cap and body portions adjacent the opposite end of the connector to normally maintain the cap portion in its operative position, an opening through said cap portion, and a clamping screw threaded in said opening and in the opposite side walls of said body portion for clamping the end of an electric cable within the connector.

6. In a solderless connector for electrically connecting an electric cable, a main body portion of substantially U-shape formed of a material having relatively high electric conductivity, a cap portion formed of a material having relatively high mechanical strength and having depending side walls embracing the side walls of the body portion, means hingedly connecting the side walls of the cap and body portions adjacent one end of the connector to permit swinging of the cap portion to uncover the connector from the top, an opening through said cap portion, and a clamping screw threaded in said opening and in the opposite side walls of said body portion for clamping the end of an electric cable within the connector.

7. In a solderless connector for electrically connecting an electric cable, a main body portion of substantially U-shape formed of material of 5 good electrical conductivity, a steel cap portion having depending side walls embracing the side walls of the body portion, means hingedly connecting the side walls of the cap and body portions adjacent one end of the connector to permit swinging of the cap portion to uncover the connector from the top, interengaging means on the side walls of said cap and body portions adjacent the end of the connector to normally maintain the cap portion in its operative position, an opening through said cap portion, and a clamping screw of good electrical conductivity threaded in said opening and in the opposite side walls of said body portion for clamping the end of an electric cable within the connector.

RALPH H. KINGDON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Jensen Mar. 13, 1945

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1741804 *Jun 2, 1928Dec 31, 1929Park Metalware Co IncClamp for electrical cables
US2088481 *May 21, 1936Jul 27, 1937Westinghouse Electric & Mfg CoTerminal clamp
US2145556 *Feb 3, 1937Jan 31, 1939Metropolitan Device CorpSolderless connecter
US2147160 *Oct 9, 1937Feb 14, 1939Hagist Emil TWire clamp and connecter
US2199793 *Feb 19, 1938May 7, 1940Trumbull Electric Mfg CoTerminal clamp for electric fuses, etc.
US2265911 *Aug 18, 1939Dec 9, 1941Wadsworth Electric Mfg CoSolderless wire connector
US2312240 *Jul 7, 1939Feb 23, 1943Bern DibnerNut retainer for electrical connectors
US2371446 *Jun 11, 1942Mar 13, 1945Cole Electric Products Co IncElectrical connector
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2646485 *Feb 8, 1950Jul 21, 1953Fed Electric Prod CoCombined contact and terminal member for electric switches
US2658978 *Mar 15, 1951Nov 10, 1953Cutler Hammer IncElectric switch
US2795685 *Feb 2, 1955Jun 11, 1957Acra Electric CorpElectrical connector
US2798113 *Mar 29, 1954Jul 2, 1957Bell Telephone Labor IncShield connectors
US2899524 *Jun 28, 1956Aug 11, 1959Thesmith
US2938191 *Feb 24, 1958May 24, 1960Murray Mfg CorpElectrical pressure connector
US2988615 *Feb 25, 1958Jun 13, 1961Raymond BernierMovable contacts for electromagnetic relays
US3066277 *Apr 21, 1958Nov 27, 1962Ite Circuit Breaker LtdSolderless connector
US3118718 *Sep 20, 1960Jan 21, 1964Hubbell Inc HarveyElectrical wiring device
US3124409 *Dec 11, 1961Mar 10, 1964 electrical connector
US3125398 *Jun 28, 1961Mar 17, 1964 Electrical connector for neutral bars
US3391359 *Jun 9, 1966Jul 2, 1968Square D CoStationary contact structure and magnet support for an electromagnetic contactor
US3683414 *Apr 13, 1970Aug 8, 1972Gelzheiser Francis LTerminal device
US4306126 *Aug 16, 1979Dec 15, 1981Howard D UBattery cable switch
US4410775 *Oct 13, 1981Oct 18, 1983Howard D USnap-action battery cable switch
US5192144 *Jun 4, 1991Mar 9, 1993Doninger Michael BEnd finishing device for rope, wire, cable, and the like
WO1992021885A1 *May 29, 1992Dec 10, 1992Michael B DoningerImproved end finishing device for rope, wire, cable, and the like
Classifications
U.S. Classification439/814, 200/284, 24/135.00N
International ClassificationH01R4/38, H01R9/16, H01R4/40, H01R9/00, H01R4/36, H01R4/28
Cooperative ClassificationH01R4/36, H01R4/40, H01R9/16
European ClassificationH01R9/16, H01R4/36, H01R4/40