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:
Aug. 04, 1981
Filed:
Apr. 30, 1979
Christopher I Reynolds, Walpole, MA (US);
Northrop Corporation, Los Angeles, CA (US);
Abstract
A closed loop control system for maintaining a force transducer assembly in a balanced position is disclosed. The control system has a feedback loop control circuit for providing a force rebalance signal at one of a plurality of predetermined discrete amplitude values during each of a plurality of successive equal duration time intervals. The signal has a constant amplitude during each interval. The control circuit further provides a respective digital representation for each amplitude value of the rebalance signal for each of the successive time intervals. Thereby, a precise determination of the value of the time-force product can be generated with the concomitant determination of the forces acting upon the force responsive transducer. The control system is particularly useful for non-linear transducers, such as square law devices where the time-force product is difficult to determine with continuously variable amplitude values.