Apparatus for protecting electrically operated devices

摘要

Apparatus for protecting electrically operated devices from damage as a result of penetration of moisture has an electric switch or a normally intact conductor, and an explosive or ignitable actuator which initiates an opening or closing of the switch or at least partial destruction of the conductor when operated by one or more sensors which detect the presence of moisture in or close to the electrically operated device. The explosive actuator can be used to clear the path for movement of a movable switch contact from open to closed position or vice versa, or to break up a conductor when ignited or otherwise operated in response to a signal from the moisture sensor or sensors. A combustible actuator can employ a flash light whose envelope confines a portion of a conductor and further contains a combustible material serving to generate heat on ignition in response to a signal from the sensor or sensors whereby the heat destroys the integrity of the portion of the conductor in the envelope.