초록 ▼

A gas monitoring system for use with a gas-fired boiler in a house or the like. The boiler is supplied with flammable gas. The system comprises a transducer, a visible and audible alarm circuit, a digital access terminal, an exhaust fan, and alarm systems, which may be audible or visual. Leaked gas

A gas monitoring system for use with a gas-fired boiler in a house or the like. The boiler is supplied with flammable gas. The system comprises a transducer, a visible and audible alarm circuit, a digital access terminal, an exhaust fan, and alarm systems, which may be audible or visual. Leaked gas is detected by a gas transducer which produces a voltage indicative of the presence of gas. An electronic circuit, which comprises a comparator, buffer, and power transistor, receives the voltages from the transducer and, when a predetermined level of voltage is received, turns on and closes two switches. One switch enables an audio alarm and provides power to a second switch. The second switch, when closed, joins a source of power to a visual alarm (a bulb), turns on an exhaust fan, and closes a normally open solenoid valve. The solenoid valve is in the gas-conveying conduit. Closing the valve shuts off the unwanted flow of gas. The first switch is provided with a manual reset switch for resetting the system.

대표청구항 ▼

A gas sensing and control device operated by a source of electricity and being of the type for use with a gas conduit for channeling gas to a heating device or the like, said sensing and control device comprising: a) transducer means for sensing the concentration gas in the air and providing voltage

A gas sensing and control device operated by a source of electricity and being of the type for use with a gas conduit for channeling gas to a heating device or the like, said sensing and control device comprising: a) transducer means for sensing the concentration gas in the air and providing voltage indicative thereof; b) electronic circuit means, responsive to said transducer means, for providing at least two logic signals indicative of whether or not the concentration of the gas has exceeded a predetermined level; and b) valve control means, connected to the gas conduit so as to, in an operative condition, close the conduit thereby preventing the flow of the gas; said valve control means being operative in response to one of said two logic signals from said electronic circuit means when the gas concentration exceeds said predetermined level.