Eyeglasses; Sirens; Combustible gas concentration detectors; Control valves for regulating the flow of gases and liquids; Electric door bells; Electric valve actuators; Electrical plugs and sockets; Gas appliance alarm timer for detecting and alerting the presence of gas flow after a prescribed period of time; Kitchen timers, non-electric; Smoke detectors; Solenoid valves; Time switches, automatic; Timing dials