Circuit for constant temperature operation of a catalytic combustible gas detector
Patent 4533520 Issued on August 6, 1985. Estimated Expiration Date: 
July 2, 2004. 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.
July 2, 2004. 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.Patent References 3429178 Gas sensitive devices Patent #: 3932807 InventorsAssigneeApplicationNo. 06/627302 filed on 07/02/1984US Classes:422/96, Wheatstone bridge422/98, Analysis based on electrical measurement73/23.21With compensation detail (for error or drift correction, etc.)ExaminersPrimary: Turk, ArnoldAssistant: Delahunty, C. M. Attorney, Agent or FirmInternational ClassesG01N 27/14 (20060101)G01N 27/16 (20060101) AbstractA catalytic gas detector circuit in which a resistive gas detector element is common to two bridge circuits, and wherein the resistance and temperature of the detector element are maintained essentially constant. This permits the use of a dynamic compensator element without encountering hysteresis effects and improves the response time of the circuit. | |
