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Publication numberUS2506979 A
Publication typeGrant
Publication dateMay 9, 1950
Filing dateFeb 20, 1947
Priority dateFeb 20, 1947
Publication numberUS 2506979 A, US 2506979A, US-A-2506979, US2506979 A, US2506979A
InventorsVarnum Edward W
Original AssigneeAlbert & J M Anderson Mfg Comp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electrical connector
US 2506979 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

y 50 E. w. VARNUM 2,506,979

ELECTRICAL CONNECTOR Filed Feb. 20, 1947 ATTORNEY Patented May 9, 1950 UNITED STATES PATENT OFFICE ELECTRICAL CONNECTOR Application February 20, 1947, Serial No. 729,743

2 Claims.

This invention relates to an electrical connector.

In general, the object of the invention is to provide a novel and improved insulated electrical connector wherein the insulation is constructed to cover the connector for its entire length to thereby protect it against accidental short-circuiting, and wherein a portion of the insulation is arranged to be automatically contracted at the forward end of the connector when the electrical connection is being made to a similar or other connector.

With the foregoing general object in view, and such others as may hereinafter appear, the invention consists in the insulated electrical connector and in the insulating member for an electrical connector, hereinafter described and particularly defined in the claims at the end of this specification.

In the drawings illustrating the preferred embodiment of the invention, Fig. 1 is a cross-sectional view of two insulated electrical connectors shown in their operative connected positions; and Fig. 2 is a perspective View of an insulated electrical connector embodying the invention.

In accordance with the present invention an electrical connector of the type comprising an elongated body portion is provided with connecting means at its forward end adapted for coopenation with another electrical connector to effect an electrical connection, and the body portion is provided with an insulating sleeve enclosing the same and normally extending beyond said connecting means of the connector. The insulating sleeve is constructed to contract and expose the aforesaid connecting means when pressure is applied to the end of the sleeve by a, portion of the second connector when the electrical connection is being made.

Referring now to the drawing, which illustrates the preferred embodiment of the invention, Ill, I2 comprise identical connectors, each having a tubular body portion to which the cables I4, I6 are connected in accordance with the usual practice. The body portion of each connector is provided with fingers I3, I so arranged as to permit the two connectors to be moved in a longitudinal direction into telescoping engagement when the connection is made. In the illustrated embodiment Of the invention the fingers comprise semicircular elements of unequal dimensions, one finger I3 having a smaller radius in cross-section than its opposed finger I5, so that when the connection is made the smaller fingers fit within and slidingly engage the larger radius fingers of the terminal members. Provision is also preferably made for locking the fingers in their engaged position, and as herein shown notched portions 26 are provided along the longitudinal edges of adjacent fingers I5, and these notches are brought into engagement by imparting a slight twisting or rotary motion to the connectors, as will be apparent from an inspection of Fig. 1.

While the illustrated form of connecting means is preferably provided at the forward end of each electrical connector, it will be understood that various other forms of connecting means may be employed, including for example that disclosed in the United States patent to Reynolds No. 2,125,816, August 2, 1938.

In accordance with the present invention a metallic connector, having the elongated body portion provided with connecting means at its forward end, is enclosed within an insulating sleeve indicated generally at 20, and having a portion 22 preferably snugly fitting the rear of the body portion and projecting beyond the same, and also preferably having a portion 23 fitting snugly upon the end of the cable connected to the connector. The insulating sleeve is constructed to fit more loosely upon the forward end of the body portion and to normally project a substantial distance beyond the end of the connecting means to thereby fully insulate the connector against accidental short-circuiting when the connector is disconnected. The forward end of the insulating sleeve is also constructed so as to be capable of contraction in a general longitudinal direction upon the application of pressure to the end of the sleeve, thereby enabling the connecting means of the connector to be automatically exposed when the connector is pressed against the second connector with which it is to cooperate in making the electrical connection. As herein shown, the forward end of the sleeve is provided with a plurality of pleats analogous in structure to an accordion pleat so that as illustrated in Fig. 1, when two of the insulated connectors are brought together in the act of making the electrical connection by the telescoping engagement of the fingers I3, I5, as described, the forward ends of the sleeves 20 are brought into abutment so that pressure of one exerted upon the other during the act Of making the connection serves to compress and contract the pleated portion of the sleeves into the position shown in Fig. 1. In practice it is preferred to construct the sleeve of rubber and to mold the entire sleeve into the shape shown in Fig. 2. When the connection is made, the resilience of the contracted portion of the sleeve serves to urge the same against the sleeve upon the second connector, thereby providing a substantially continuous insulation for the connector. When two insulated connectors embodying the present invention are utilized in making the connection, such as is shown in Fig. 1, the resilience of the pleated and compressed portions of the sleeves serves to hold the sleeves firmly in abutment, providing an efiicient insulation for the entire connection. In addition the resilience of the compressed pleated portions of the sleeves assists in holding the notched portions 26 of the connectors in engagement, reducing to a minimum :the 'liability of the connector accidentally becomin disengaged.

While the preferred embodimentof the ,invention has been herein illustrated and-described, it will be understood that the invention may be embodied in other forms within the scope of the following claims.

Having thus described the invention, what is claimed is:

1. An electrical connector comprising an elongated cylindrical metal body portion of substantially uniform diameter throughout its length provided with fingers at its forward end constructed for telescoping engagement with corresponding fingers of a second connector, said metal body portion being provided with and. enclosed within a flexible rubber insulating sleeve snugly fitting said body portion and extending a substantial distance beyond the forward end thereof when disconnected, the forward portion of said sleeve being provided with a plurality of transverse accordion pleats and capable of substantial longitudinal collapsing movement along said body portion to project said fingers beyond said sleeve when pressure is applied to the end of said sleeve by abutment with a corresponding sleeve of the second connector, the rearmost end of said sleeve being fixed relative to said fingers.

2. An electrical connector comprising an elongated cylindrical metal body portion of substantially uniform diameter throughout its length provided with fingers at its forward end constructed for telescoping engagement with corresponding fingers of a second connector, said metal body portion being provided with and enclosed within a flexible rubber insulating sleeve snugly and fixedly fitting the rear of said body portion and with the forward portion of said sleeve more loosely fitting over and extending a substantial distance beyond the forward end of the body portion when disconnected, the forward portion of said sleeve being provided with a plurality-of transverse accordion pleats and capable of substantial longitudinal collapsing movement along said body portion whereby to contract into tight gripping engagement with said fingers when pressure is applied to the end of said sleeve by abutment with a corresponding sleeve of the second connector to thereby assure firm contacting engagement of the fingers and to provide in effeet a continuous insulation for the joined connectors.

EDWARD W. VARNUM.

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

UNITED STATES PATENTS Number Name Date 1,731,297 Del Mar Oct. 15, 1929 2,065,315 Keath Dec. 22, 1936 2,117,029 Larsson May 10, 1938 2,127,544 Von Holtz Aug. 23, 1938 2,136,848 Hassler Nov. 15, 1938 2,335,843 Rogoif Nov. 30, 1943 2,386,177 Andersen Oct. 9, 1945

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1731297 *Apr 20, 1928Oct 15, 1929Habirshaw Cable & Wire CorpMethod of and means for improving insulation of cables
US2065315 *Jun 28, 1934Dec 22, 1936Wagner Electric CorpFlexible guard for bushing terminals
US2117029 *Feb 16, 1937May 10, 1938Ohio Brass CoElectric connecter
US2127544 *Mar 22, 1935Aug 23, 1938Hubbell Inc HarveyWaterproof rubber covering for cord connecters
US2136848 *Feb 23, 1938Nov 15, 1938Hassler Willard ODetachable connecter
US2335843 *Oct 24, 1942Nov 30, 1943Julian RogoffSeparable connector
US2386177 *Apr 25, 1942Oct 9, 1945Johan M AndersenElectrical connector
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2659062 *May 3, 1950Nov 10, 1953Tibbetts Otto SDetachable coupling for electrical cables
US2690542 *Nov 10, 1949Sep 28, 1954Albert & J M Anderson Mfg CompElectrical connector
US2755449 *Nov 19, 1952Jul 17, 1956Anderson Alf EElectrical connector
US2764749 *Apr 7, 1952Sep 25, 1956Garrett CorpTerminal block
US3153434 *Jan 16, 1962Oct 20, 1964Kiyoshi ShimokawaScrewdriver with releasable blade
US3155448 *Sep 19, 1960Nov 3, 1964Haydon Switch & Instr IncElectrical connector
US3571782 *Feb 25, 1969Mar 23, 1971Pulse Communications IncMoisture and dust proof cover for an electrical connector and tool for applying same
US3683315 *Nov 19, 1970Aug 8, 1972Kelly WilliamShielded heavy duty cable connector
US3711135 *Feb 5, 1971Jan 16, 1973Akesson AQuick coupling for connecting together conductors, hoses and similar elongated members
US3889308 *Nov 15, 1973Jun 17, 1975Sibilia Thomas WFloating paddle
US4080842 *Jun 10, 1974Mar 28, 1978The Laitram CorporationPivot device
US4204188 *May 2, 1978May 20, 1980Prakla-Seismos GmbhCable for sea seismic exploration
US4477136 *Oct 29, 1982Oct 16, 1984Mark Products IncorporatedTakeout connector
US4489997 *Mar 15, 1982Dec 25, 1984Stow & Davis Furniture CompanyElectrical connector
US4810199 *Nov 25, 1987Mar 7, 1989Kar Kishore KSafety electrical plug
US6167291 *Mar 12, 1998Dec 26, 2000Cardima, Inc.Protected pin connector for an electrophysiology catheter
US6261110 *Nov 12, 1998Jul 17, 2001Sharp Kabushiki KaishaConverter for receiving satellite broadcasting having extensible/retractable waterproof cover attached at its junction portion
US9040822Mar 12, 2012May 26, 2015Ricardo Nieto LopezSafety device for live electrical wire
US20100285679 *Nov 11, 2010Miller Ryan ASpring boot
Classifications
U.S. Classification439/286, 403/339, 403/393, 403/341, 439/141
International ClassificationH01R13/453, H01R13/44
Cooperative ClassificationH01R13/4538
European ClassificationH01R13/453H