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Publication numberUS2076136 A
Publication typeGrant
Publication dateApr 6, 1937
Filing dateJan 3, 1936
Priority dateJan 3, 1936
Publication numberUS 2076136 A, US 2076136A, US-A-2076136, US2076136 A, US2076136A
InventorsWeed Edward E
Original AssigneeWeed Edward E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric plug
US 2076136 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

April 6, 1937. E WEED 2,076,136

ELEGTRI C PLUG Filed Jan. 5, 1936 Invenlor zg/wm E Med 6 A llomeys Patented Apr. 6, 1937 UNlTED STATES PATENT GFFHIE 3 Claims.

This invention appertains to new and useful improvements in electric plugs, the same being an improvement on my co-pending application 6. N. 720,325 filed April 12, 193 i.

The principal object of the present invention is to provide an automatic cut-out plug which in operation will be substantially automatic in all respects.

Another important object of the invention is 10 to provide 21. out ut plug of the character stated which will eliminate all manual tension.

Other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawing:

Figure 1 represents a longitudinal sectional view through the plug.

Figure 2 represents an end elevational view of the plunger.

I Referring the drawing wherein like numerals designate like parts, it can be seen that numeral 5 represents a dielectric casing provided with the end wall "I and the plug 8 engaged into and secured to the opposite end oi the shell.

95 The end wall 1 is provided with an opening 9 therein through which the plunger stem It is slidable. This stem I is slidable through the electro-magnetic coil H and is provided with a bore I2 extending inwardly of its inner end for receiving a substantial portion of the coiled compressible spring E3. The other end of the spring I3 engages into a recess in one side of the dielectric partition 14 which crosses the inside of the shell and supports the two bind-- ing posts l5--l6. A jumper between the post l5 and the coil H is denoted by numeral ll,

While a jumper l8 extending through the wall of the shell 5 extends from the binding post or screw H to the prongs on. the end wall I.

The prong H is connected as at 22 to the other side of the coil ll.

A slot is provided in the bridge plate 23 through which the stem i0 is slidable. A spring yoke 24 in this slot engages the stem Ill and frictionally holds the bridge plate 23 to the stem ID. The opposite end of the stem l0 protrudes beyond the end wall I of the shell 5, so that when the prongs 20-2l are engaged with a wall socket or the like, the stem I0 is pushed inwardly and forces the bridge piece 23 to bridge the contacts Iii-l6. In the event of a short circuit, the coil H becomes energized sufiiciently to attract the bridge piece 23 which slides on the stem I0. When the plug is removed from the 55 electrical receptacle, the stem I0 is again projectecl outwardly from the spring it so that the bridge member 2? returns to its proper position on the stem Lil.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that changes in the shape, size and materials may be resorted to without departing from the spirit or scope of the invention as claimed hereinafter.

Having thus described claimed as new is:

1. In an electric plug. an electro-magnet, a pair of contacts spacedly opposed to one end oi the magnet, an armature adapted to bridge the contacts and being magnetically responsive to the magnet, a stem extending from the armature and longitudinally of the magnet to project beyond the opposite end thereof and adapted to hold the armature bridging the contacts in re sponse to the application of longitudinally directed external force, and frictional clutch means constructed and arranged between the armature and the stem whereby the armature can slide on the stem in response to the magnetic force of the electro-magnet to unbridge the said contacts.

2. In an electric plug, an electro-magnet, a pair of contacts spacedly opposed to one end of the magnet, an armature adapted to bridge the contacts and being magnetically responsive to the magnet, a stern extending from the armature and longitudinally of the magnet to pro ject beyond the opposite end thereof and. adapted to hold the armature bridging the contaste in response to the application of longitudinally directed external force, and frictional clutch means constructed and arranged between the armature and the stem whereby the armature can slide on the stem in response to the magnetic force of the electro-magnet to unbridge the said contacts, and spring means engaged with the stem normally tending to urge the stem outwardly with the armature removed from the contacts.

3. In an electric plug, an electrmmagnet, a pair of contacts spacedly opposed to one end of the magnet, an armature adapted to bridge the contacts and being magnetically responsive to the magnet, a stem extending from the armature and longitudinally oi the magnet to project beyond the opposite ,end thereof and adapted to hold the armature bridging the contacts in response to the application of longitudinally directed external force, and frictional clutch means constructed and arranged between the invention, what is ture provided with an opening through which the stem is slidably disposed, said spring member being adapted to tensionally engage the portion of the stem extending through the opening of the armature.

EDV/ARD E. WEED.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2425668 *Dec 20, 1943Aug 12, 1947Metais & Controls CorpMotor starting and protective apparatus
US2427390 *Sep 28, 1943Sep 16, 1947A F Von Soden & CoOverload controlling plug
US2462715 *Sep 16, 1944Feb 22, 1949Booth James CWarning magnetic unit
US2688734 *Jun 12, 1950Sep 7, 1954Welling Conrad GElectrically releasable electric connector
US2816185 *Dec 21, 1956Dec 10, 1957Berticevich George CElectrical connector
US2831935 *Jul 11, 1955Apr 22, 1958Gen ElectricCombination circuit breaker and motor starter
US2919323 *Jul 1, 1957Dec 29, 1959Drescher John FElectric relay
US3431428 *Apr 19, 1967Mar 4, 1969Andrew F Van ValerSafety vehicle power distribution system
US4481388 *Feb 24, 1983Nov 6, 1984Electrak International, Inc.Electrical plug with automatic shut-off feature
US4491791 *Dec 13, 1982Jan 1, 1985General Electric CompanySensing switch for a detachable communications probe
US5211569 *Nov 27, 1991May 18, 1993Petrina HavensElectrical power cord and appliance using same
US7044759Jun 21, 2004May 16, 2006Stephen James HughesAutomatically disconnecting plug and method of triggering disconnection of an automatically disconnecting plug
US8662903 *Jun 24, 2010Mar 4, 2014Nissan Motor Co., Ltd.Electrical component structure
US20100255698 *Aug 24, 2009Oct 7, 2010Compal Electronics, Inc.Electronic device and connector thereof
US20120045907 *Jun 24, 2010Feb 23, 2012Nissan Motor Co., Ltd.Electrical component structure
Classifications
U.S. Classification335/261, 439/38, 200/51.00R
International ClassificationH01H71/12, H01H71/24
Cooperative ClassificationH01H71/2463
European ClassificationH01H71/24G