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:
Jul. 04, 1989
Filed:
Jan. 20, 1988
John E Bohan, Jr, Minneapolis, MN (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
A sensor fault detector for detecting a missing or shorted environment condition sensor of a plurality of sensors includes a sensor circuit for supplying a concurrent output signal from each sensor, a reference voltage circuit for supplying a predetermined reference voltage, a plurality of comparators, each of the comparators concurrently comparing a repective one of the output signals with the reference signal to produce a corresponding comparator output signal representative of a predetermined relationship between the compared signals assure the presence of properly working and connected sensors and a monitoring circuit responsive to the concurrent effect of output signals from all of the comparators to produce a control signal representative of a concurrent properly working and connected state of all of the sensors.