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. 31, 1979
Filed:
Apr. 04, 1977
Johann Spies, Pfaffenhofen, DE;
Alfons Wohrl, Schrobenhausen, DE;
Messerschmitt-Bolkow-Blohm GmbH, Munich, DE;
Abstract
A circuit monitors the operational readiness of the trigger arrangement in a safety device that protects passengers in a vehicle, for example, the ignitors which inflate the air bags of a vehicle in response to an actual or impending collision. The triggers are parts of two series connected safety circuits which include a filter-controlled thyristor and a Zener diode having a grounded anode. A supplemental safety circuit connected to a tap between the safety circuits uses two comparators to compare the tap voltage with the upper and lower limit signals. When the limit signals are exceeded the safety circuit is disconnected from the system's collision detector.