Abstract: There is provided an electric solenoid for a building fire suppression system that provides a supervisory or warning signal when the solenoid is removed from its service location. The primary coil winding of the solenoid extends through a base that is detachable from the solenoid. The base remains fixed in place at the service location for the solenoid. When the solenoid is properly installed on the base, a conductor in the base provides the connection to complete the solenoid coil circuit, making it operational. When the solenoid is removed from the base, the coil circuit is interrupted. Connected circuitry that interfaces with the solenoid coil circuit provides a supervisory signal to a remote location, a local location, or both, when the coil circuit is interrupted. When the solenoid is properly installed on the base, a coil spring urges and biases the base firmly against the solenoid to maintain electrical contact between the base and the solenoid.

Abstract: There is provided an electric solenoid for a building fire suppression system that provides a supervisory or warning signal when the solenoid is removed from its service location. The primary coil winding of the solenoid extends through a base that is detachable from the solenoid. The base remains fixed in place at the service location for the solenoid. When the solenoid is properly installed on the base, a conductor in the base provides the connection to complete the solenoid coil circuit, making it operational. When the solenoid is removed from the base, the coil circuit is interrupted. Connected circuitry that interfaces with the solenoid coil circuit provides a supervisory signal to a remote location, a local location, or both, when the coil circuit is interrupted. When the solenoid is properly installed on the base, a coil spring urges and biases the base firmly against the solenoid to maintain electrical contact between the base and the solenoid.