The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 1991
Filed:
Nov. 30, 1988
Applicant:
Inventors:
Assignee:
Eftag-Entstaubungs- und Fordertechnik AG, Biel, CH;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ; F25B / ; G06F / ;
U.S. Cl.
CPC ...
36455101 ; 36442405 ; 340634 ; 73 3106 ; 165 16 ; 98-211 ; 236 493 ;
Abstract
A circuit for the evaluation of a signal produced by a semiconductor gas sensor provides a reliable control for manipulating a recirculated air valve in motor vehicles and their air-conditioning systems and includes a voltage divider connected with an integrator having a time constant bigger than time needed for reaching a peak of noxious gases outside of the motor vehicle.