Gas detection and alarm system for monitoring gas such as carbon monoxide
First Claim
1. A gas detection and alarm system for monitoring carbon monoxide, comprising:
- detection means for detecting a predetermined dose of carbon monoxide, the detection means including a semiconductor-type carbon monoxide sensor having a plurality of connections connected to at least three terminals of a microprocessor through a plurality of transistors;
indication means for indicating the dose detected by the detection means to the user, said indication means including a temperature compensating circuit for maintaining a constant temperature thereof;
microprocessor means including the microprocessor for digitally controlling said indication and detection means;
power conversion means for supplying constant power to said detection and indication means;
housing means for housing said detection, indication, microprocessor and power conversion means,wherein said housing means has a circular configuration and includes an electric plug disposed on a bottom surface of said housing means, and said indication means includes a buzzer for generating an audio sound and a first transistor directly connected to said buzzer;
wherein said housing means further includes;
a top cover having a light emitting portion, anda bottom plate having said electric plug and a surface for mounting thereon said indication, power conversion, microprocessor, and detection means in a substantially coplanar manner, said top cover and bottom plate engaging each other to form a housing unit;
wherein said light emitting portion includes a movable switch for resetting the system after activation of said indication means to indicate said dose detection; and
wherein said power conversion means includes a power conversion circuit having no transformers, said conversion circuit receiving AC power and generating constant DC power from said AC power.
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Accused Products
Abstract
A gas detection and alarm system and a method thereof for monitoring a predetermined dose of carbon monoxide and other gases in the atmosphere which can be harmful to humans, having a gas detection/alarm device comprising a detection circuit which detects a predetermined dose of a gas such as carbon monoxide, an indication circuit which visually and audibly indicates the dose detection to the user based on the detection circuit, a microprocessor for digitally operating the detection circuit and the indication circuit, a power conversion circuit which converts AC power to DC power without using any transformers and which supplies the converted constant power to the detection circuit, indication circuit and microprocessor, and a housing which compactly houses the detection circuit, indication circuit, power conversion circuit and microprocessor.
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Citations
8 Claims
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1. A gas detection and alarm system for monitoring carbon monoxide, comprising:
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detection means for detecting a predetermined dose of carbon monoxide, the detection means including a semiconductor-type carbon monoxide sensor having a plurality of connections connected to at least three terminals of a microprocessor through a plurality of transistors; indication means for indicating the dose detected by the detection means to the user, said indication means including a temperature compensating circuit for maintaining a constant temperature thereof; microprocessor means including the microprocessor for digitally controlling said indication and detection means; power conversion means for supplying constant power to said detection and indication means; housing means for housing said detection, indication, microprocessor and power conversion means, wherein said housing means has a circular configuration and includes an electric plug disposed on a bottom surface of said housing means, and said indication means includes a buzzer for generating an audio sound and a first transistor directly connected to said buzzer; wherein said housing means further includes; a top cover having a light emitting portion, and a bottom plate having said electric plug and a surface for mounting thereon said indication, power conversion, microprocessor, and detection means in a substantially coplanar manner, said top cover and bottom plate engaging each other to form a housing unit; wherein said light emitting portion includes a movable switch for resetting the system after activation of said indication means to indicate said dose detection; and wherein said power conversion means includes a power conversion circuit having no transformers, said conversion circuit receiving AC power and generating constant DC power from said AC power. - View Dependent Claims (2, 3, 4)
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5. A gas detection and alarm system for monitoring carbon monoxide, comprising:
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detection means for detecting a predetermined dose of carbon monoxide, the detection means including a semiconductor-type carbon monoxide sensor having a plurality of connections connected to at least three terminals of a microprocessor through a plurality of transistors; indication means for indicating the dose detected by the detection means to the user, said indication means including a temperature compensating circuit for maintaining a constant temperature thereof; microprocessor means including the microprocessor for digitally controlling said indication and detection means; power conversion means for supplying constant power to said detection and indication means; housing means for housing said detection, indication, microprocessor and power conversion means; strobe light emitting means for emitting a strobe light when said predetermined dose of gas is detected; trigger means for triggering said strobe light; and voltage doubler means for supplying constant voltage to said trigger means and said strobe light emitting means, wherein said housing means includes; a top cover having a light emitting portion, and a bottom plate having an electric plug and a surface for mounting thereon said indication power conversion, microprocessor, and detection means in a substantially coplanar manner, said top cover and bottom plate engaging each other to form a housing unit. - View Dependent Claims (6, 7, 8)
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Specification