Solid state relay
OwnerFrederick Woodinventor
Life of this patent
Estimating the term…
Abstract
An electrical relay control circuit device which is connected to a controlling load such as a motion picture machine from a power source, and to controlled load such as the room lights, so that when the machine is in operation, the room lights cut off, and when the machine is cut off, then the room lights are turned on. The circuitry includes a transformer the primary of which carries the current to the controlling load, so that the secondary exhibits voltage when the controlling load is in operation, there being a relay switch for opening the circuit to the room light load, and Triac means for controlling the relay switch.
Claims2
An electrical relay control circuit device comprising power input means connectable to a source of electrical power for receiving power therefrom, first power output means connectable to a controlling load unit device for delivering power from said power input means thereto, second power output means connectable to a controlled load unit device for delivering power from said first power input means thereto, and switching circuit means between said power input means and second power output means for selectively regulating the delivery of said power to said controlled load unit device in response to the flow or nonflow of power to said first power output means, said switching circuit means including normally closed relay switch means between said power input means and said second power output means, and solid state bidirectional switch means for opening said relay means to de-energize said controlled unit in response to the flow of power from said power input means to said first power output means.
Dependencies are inferred from the claim text.