Gas detection and alarm system for monitoring gas such as carbon monoxide

Patent 5694118 Issued on December 2, 1997. Estimated Expiration Date:

December 28, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

1313089

3246312

3445669

Gas detecting and monitoring device
Patent #: 4498330
Issued on: 02/12/1985
Inventor: Hosoya

Combined smoke and gas detection apparatus
Patent #: 4688021
Issued on: 08/18/1987
Inventor: Buck , et al.

Cleaner assembly, humidifier, gas alarm and detoxification system
Patent #: 4839014
Issued on: 06/13/1989
Inventor: Park , et al.

Gas alarm and detoxification heating systems
Patent #: 4893113
Issued on: 01/09/1990
Inventor: Park, et al.

Flashing light siren alarm
Patent #: 5132659
Issued on: 07/21/1992
Inventor: Kuo

Forced air furnace control system and method of operation Patent #: 5239980
Issued on: 08/31/1993
Inventor: Hilt, et al.

Inventors

Application

No. 365290 filed on 12/28/1994

US Classes:

340/632, Gas73/23.21, With compensation detail (for error or drift correction, etc.)340/628, Smoke340/633, Catalytic detector340/634Semiconductor detector

Examiners

Primary: Swarthout, Brent A.
Assistant: Trieu, Van T.

Foreign Patent References

2276970 GB 10/13/1994
8606528 WO 11/13/1986

International Class

G28B 017/10

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.