Switch controlled power receptacle system
OwnerCharles A. Nashinventor
Life of this patent
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Abstract
An electrical appliance having a switch controlled plug type connector may be plugged into any one of a plurality of power terminal receptacles connected to a power line through a wall switch or the like. Common ground and neutral conductors are interconnected in parallel with said receptacles while current carrying conductors interconnect in series normally closed contact pairs in each receptacle. The normally closed contacts in each receptacle are opened in response to insertion of the connector to complete an operating circuit and block completion of other operating circuits further from the power source.
Claims9
In combination with a source of electrical energy, a system of supplying said electrical energy to an electrically operated device, comprising a plurality of plug-in receptacles, a connector device having a plurality of prongs adapted to be inserted into any selected one of said receptacles, means electrically connecting said connector device to the electrically operated device for completing an operating circuit through the electrically operated device, each of said plug-in receptacles having normally closed contact means opened in response to insertion of the prongs into the receptacle, and electrical conduit means interconnecting the receptacles with said source for establishing said operating circuit only through the opened contact means of the selected one of the receptacles in series with the normally closed contact means of those receptacles located between the selected one of the receptacles and the source of electrical energy.
In combination with a source of electrical energy electrically connected to a plurality of terminal devices and connector means establishing an operating circuit by engagement with any selected one of said terminal devices, said terminal devices each including a pair of normally closed contact elements opened in response to said engagement of the connector means with the associated terminal device alternatively extending the operating circuit to another of the terminal devices or completing the operating circuit only at the terminal device associated therewith.
Dependencies are inferred from the claim text.