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Publication numberUS2170287 A
Publication typeGrant
Publication dateAug 22, 1939
Filing dateJun 14, 1937
Priority dateJun 14, 1937
Publication numberUS 2170287 A, US 2170287A, US-A-2170287, US2170287 A, US2170287A
InventorsKinnebrew Walter L
Original AssigneeKinnebrew Walter L
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Detachable electrical connector
US 2170287 A
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Description  (OCR text may contain errors)

Aug. 22, 1939. w. L. KINNEBREW ,2

DETACHABLE ELECTRICAL CONNECTOR Filed June 14, 1937 Y. MW m 3 m m A w Patented Aug. 22, 19 39 UNITED STATES I PATENT OFFICE Application June 14,

4' Claims.

The invention relates to detachable electrical connectors of the type commonly used for connecting various extension conductors of an electrical circuit and for connecting and disconnecting various electrical appliances with so-called wall receptacles or convenient outlets.

An object of the invention is to provide a detachable electrical connector of the character described which will provide for a fast and clean make and break of the electrical circuit and insure a positive high quality contact between the electrical contact members and thereby eliminate a source of loss and wear caused by poor, arcing, contact members.

Another object of the invention is to provide a detachable electrical connectorof the character described which while affording a firm, forceful connection of the electrical contact members will be at the same time readily de-.

20 tachable under a relatively slight opening or separating force.

A further object of the invention is to provide a detachable electrical connector of the character above which, notwithstanding the inclusion of 25 the features mentioned, maybe constructed in a compact standard size unit as heretofore in use.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of the preferred form of the invention which is illustrated in the drawing accompanying and forming part of the specification. It is to be understood, however, that variations in the showing made by'the said drawing and description may be adopted within the scope of the invention as set forth in the claims.

Referring to said drawing:

Figure 1 is a cross-sectional View of a detachable electrical connector constructed in accordance with the present invention.

Figure 2 is an end view of one of the connector members.

Figure 3 is an end view of the other connector member.

Figure 4 is a transverse cross-sectional view of the connector member illustrated in Figure 3 and is taken substantially on the plane of line 44 of Figure 1.

Figure 5 is a cross-sectional view of a detachable electrical connector similar to Figure 1, but showing a modified form of the invention.

drawing consists of detachable connector sections 5 or members 6 and l which are provided with en- 1937, Serial No. 148,017

vgageable electric contact members 8 and 8, and H and I2 respectively which are engaged in the attached position of the members 8 and I to complete an electric circuit through the connector. -As here shown, the member I is substantially in the form of'a more or less common type of wall receptacle and comprises a body or casing made up of half sections I3 and H and which is secured to a mounting plate or strap l6 for securement in a standard type receptacle box" not shown. The contact members H and I2 are here shown reciprocally mounted in bearing portions [1 and I8 provided in the body portion of the member! and are positioned with the engageable sides 18 and 2| thereof at the base of openings 22' and 23 leading to the outer face 24 of the member for the receipt and guidance of the contact members 8 and 8 of the connector member 6. -On attachment of the members the contacts 8 and 8 are extended through openings 22 and 23 and into engagement with the faces 19 and 2| ofthe contacts H and I2. and on movement of the members to a fully attached position the contacts 8 and 8 displace the contacts II and 12. Small helical springs 26 are secured to the contacts II and I2 to resiliently resist their displacement and to insure a firm positive contact of the contact members 8 and 8 with the'contact members. I l and I2.

As a principal feature of the present connector I provide a magnetic means for holding the connector members 6 and l in attached position and for moving such members rapidly into an attached position and similarly causing a quick release of the members. In the form of the invention illustrated in Figures 1 to 4, a horse shoe magnet 21 is mounted in the connector member 1 and is positioned with the free magnetic ends- 28 and 29 thereof exposed at the front face It of the member I and at opposite sides of the contact openings 22 and 23. The magnet may be mounted as here shown in opposed recesses formed in the half sections l3 and H of the member I. Forcooperation with the free ends 28 and 28 of the magnet 21, the other connector member 6 is provided with a magnetic keeper 33 which as here shown is in the form of an annular ring embedded in the forward face 34 of the member 8 opposite to the face ii of the member 1, the ring 33 being so positioned around the contacts 8 and 8 as to engage squarely across the ends 28 and 28 of the magnet. In this manner, upon advancement of the member 8 towards an attached position, the bringing of the keeper into the field of the magnet 2'| will cause a snapping of he member 8 into place and as a result a f st clean make of the electric circuit at the contacts 8, 9, II and I2 is effected. Also on engagement of the keeper 33 with the magnet the sections are firmly held in place and can be only forcibly separated. On detaching the sections, the magnet will hold the keeper up to a certain applied-force and will then abruptly release so as to cause a rapid separation of the member 8 from the member 1 and a clean rapid disconnection of the electrical contact members as a result thereof. It will further be noted that the force of the springs 28 is opposed to the force of the magnet and keeper and in accordance with the present invention, the spring tension is such as to provide a relatively. high contact pressure to insure a good quality contact between the contact members 8 and 9, and I9 and 2|, and the magnetic strength is selected so as to slightly overcome the spring force. In this way the majority of the magnetic strength may be offset by the spring tension and only a slight opening force need be manually applied to break themagnetic grip. Thus while the elec: trical contact members are engaged with a relatively great pressure in the attached position of the coupling, they may be separated by the application of a relatively slight opening pressure to the coupling members.

In the form of the invention illustrated in Figure 5 the magnet 21 is incorporated in the plug member 6' and the keeper 33' is mounted on the wall receptacle I. Preferably, in both of the embodiments one or the other or both of the magnet ends and keeper extend slightly from the opposed abutting sides of the sections 8 and I so as to insure a positive engagement of the magnet and keeper.

While in the present embodiment of the invention a horse shoe type magnet has been used and such type is preferred, substantially any other type of magnet, either of a permanent type or electrically actuated, may be used and of the permanent magnet type I may use a straight magnet bar or a flat crescent type with anappropriate form of keeper of magnetic material on the opposite coupling sections. It will be further understood that while the presentinvention has been particularly illustrated in connection with a detachable plug and wall socket type of electrical connectors, the invention may be applied to substantially all types of detachable electrical connectors.

I claim:

l. A detachable electrical connector comprising, detachable coupling sections provided with electric contacts engaged in the attached position of said sections, means producing a pressure engagement between said contacts in the attached position of said sections, and urging the separation of said sections, and magnetic means for holding said sections in attached position and exerting a force greater than said means by only a. relatively small amount. v

2. A detachable electrical connector comprising, a pair of sections movable along an axis to and from an attached position, one of said sections having a pair of axially extending electrical contact members, the other section being provided with a pair of resiliently mounted axially displaceable contact members engaged and displaced by said first contact members, a magnet on one of said sections, and a keeper on the other of said sections engageable with said magnet in the attached position of said sections for holding said sections connected against the resilience of said contact members.

3. A detachable electric connector comprising, a pair of members cast from a plastic material or the like and having opposed plane abutting surfaces, a U-shaped recess in one member extending substantially normal to said surface and a permanent horseshoe magnet mounted therein and having the terminal ends thereof mounted at said surface, an annular recess in said plane surface of the other member in alignment with said first recess and a magnetic keeper mounted therein for engagement with the terminal ends of said magnet, a pair of electrical contacts ,-mounted in one member within the area defined by said U-shaped magnet, and a cooperating pair of contacts in the other member and mounted in the area defined within said annular keeper and adapted to engage said first contacts on attachment of said members 4. A detachable electric connector comprising, a pair of attachable members having opposed 'abutting surfaces in their attached position, one

member being formed of a pair of half sections, each section provided with a U-shaped recess opening to and in registration with the recess in the other section to define a U-shaped enclosure and arranged with the opposite side portions of said enclosure terminating at said abutting surface, a U-shaped magnet in said enclosure and having its terminal ends extending to said abutting surface, electrical contacts carried by said member intermediate said terminal ends, the other member being formed with an annular recess in said abutting surface, electrical contacts carried by said last named member within the area defined by said recess and in alignment with said first contacts and engageable therewith in the attached position of said members, an annular keeper mounted in said last named recess and extending to said abutting surface and engageable with the terminal ends of said magnet to hold said pairs of contacts in engagement.

WALTER L. KINNEBREW.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2437633 *Nov 12, 1943Mar 9, 1948Abram Oliver RElectric welding ground
US2489475 *Dec 18, 1947Nov 29, 1949Dings Magnetic Separator CoMagnetic welder's ground clamp
US2526206 *Oct 16, 1948Oct 17, 1950Dolan James PMagnetic connection
US2709245 *Dec 11, 1950May 24, 1955Schneider Warren JElectrical connections for electric appliances
US2721717 *May 3, 1951Oct 25, 1955Mcgraw Electric CoElectric-cord holder
US2738476 *Nov 29, 1954Mar 13, 1956Buquor Adolph PFlashbulb holder and ejector
US2742619 *Sep 17, 1953Apr 17, 1956Buquor Adolph PLighting fixture and tube
US2788501 *Dec 16, 1948Apr 9, 1957Buquor Adolph PElectrical connector having a magnetic contact
US3038139 *Jun 13, 1958Jun 5, 1962Lionel CorpMagnetic socket device
US3200320 *Nov 13, 1962Aug 10, 1965Mallory & Co Inc P RCharging means with magnetic contacts for battery operated appliances
US3321730 *Sep 21, 1964May 23, 1967Donald M SchlangenTree lighting apparatus
US4766433 *Jul 6, 1984Aug 23, 1988Codercard, Inc.Optical card-key data connector
US4874316 *Apr 12, 1988Oct 17, 1989Sony CorporationConnector apparatus
US6250931Nov 2, 1999Jun 26, 2001Kinetic Group L.L.C.Detachable power supply apparatus
US6267602Jun 30, 2000Jul 31, 2001Kinetic Group L.L.C.Detachable power supply apparatus
US6527570Oct 3, 2001Mar 4, 2003National Presto Industries, Inc.Quick-release appliance cord assembly
US6571564Oct 23, 2001Jun 3, 2003Shashank UpadhyeTimed container warmer and cooler
US6607391Jun 25, 2001Aug 19, 2003Innovation Ip Holding Co.Detachable power supply apparatus
US6719576Dec 23, 2002Apr 13, 2004National Presto Industries, Inc.Quick-release appliance cord assembly
US6910911Jun 27, 2002Jun 28, 2005Vocollect, Inc.Break-away electrical connector
US7287386Apr 19, 2004Oct 30, 2007Snuddles, LlcContainer cooler and warmer
US7311526Sep 26, 2005Dec 25, 2007Apple Inc.Magnetic connector for electronic device
US7351066Sep 26, 2005Apr 1, 2008Apple Computer, Inc.Electromagnetic connector for electronic device
US7442060Aug 1, 2006Oct 28, 2008Vocollect, Inc.Adapter and apparatus for coupling a cord of a peripheral device with a portable terminal
US7641477Mar 11, 2008Jan 5, 2010Apple Inc.Electromagnetic connector for electronic device
US7645143Mar 24, 2009Jan 12, 2010Apple Inc.Magnetic connector for electronic device
US7762817Sep 26, 2008Jul 27, 2010Apple Inc.System for coupling interfacing parts
US7775801 *Oct 31, 2005Aug 17, 2010Microsoft CorporationDevice interfaces with non-mechanical securement mechanisms
US7901216Oct 16, 2009Mar 8, 2011Apple Inc.Magnetic connector for electronic device
US7997906Jun 17, 2010Aug 16, 2011Apple Inc.Techniques for coupling interfaces parts using moveable magnetic elements
US8087939Feb 15, 2011Jan 3, 2012Apple Inc.Magnetic connector for electronic device
US8128422Nov 5, 2004Mar 6, 2012Vocollect, Inc.Voice-directed portable terminals for wireless communication systems
US8177560 *Dec 13, 2011May 15, 2012Apple Inc.Magnetic connector for electronic device
US8241053Mar 18, 2010Aug 14, 2012Vocollect, Inc.Electrical cable with strength member
US8262403Sep 10, 2009Sep 11, 2012Vocollect, Inc.Break-away electrical connector
US8348678Jan 11, 2010Jan 8, 2013Automotive Industrial Marketing Corp.Magnetic cable connector systems
US8386261Nov 12, 2009Feb 26, 2013Vocollect Healthcare Systems, Inc.Training/coaching system for a voice-enabled work environment
US8435042Mar 16, 2012May 7, 2013Apple Inc.Magnetic connector for electronic device
US8497753Dec 8, 2009Jul 30, 2013Apple Inc.Electromagnetic connector for electronic device
US8535088Oct 20, 2009Sep 17, 2013Apple Inc.Magnetic connector having a unitary housing
US8659397Jul 22, 2010Feb 25, 2014Vocollect, Inc.Method and system for correctly identifying specific RFID tags
US8690582Sep 14, 2012Apr 8, 2014Apple Inc.Magnetic connector for electronic device
US8702316Oct 22, 2010Apr 22, 2014Apple Inc.Magnetic connector with optical signal path
US8770857Sep 15, 2012Jul 8, 2014Apple Inc.Magnetic connector with optical signal path
US20120083137 *Dec 13, 2011Apr 5, 2012Apple Inc.Magnetic connector for electronic device
US20120295451 *Jan 13, 2012Nov 22, 2012Smart Power Solutions, IncMagnetic connecting device
WO1995031018A1 *May 10, 1995Nov 16, 1995Strix LtdElectrical coupling
Classifications
U.S. Classification439/39, 439/690, 439/180
International ClassificationH01R13/62
Cooperative ClassificationH01R13/6205
European ClassificationH01R13/62A