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:
May. 30, 1989
Filed:
Apr. 22, 1988
Applicant:
Inventors:
Roger A McCurdy, Troy, MI (US);
Dana A Stonerook, Plymouth, MI (US);
Assignee:
TRW Inc., Lyndhurst, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60Q / ; B60R / ;
U.S. Cl.
CPC ...
340438 ; 340436 ; 340650 ; 340653 ; 340661 ; 180271 ; 180282 ; 180232 ; 280735 ; 361-1 ; 307 101 ;
Abstract
A test circuit for an airbag restraint system provides an accurate determination of the operativeness of a storage capacitor and calculates the resistance of inertia switch resistors. The test circuit provides for parallel testing of the storage capacitor and inertia resistors. The capacitor is tested by discharging and charging the capacitor. The values of the inertia switch resistors are determined by switching known resistive values in parallel with the inertia switch resistors. Based on the monitored voltage values during the switching, resistance values are calculated.