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:
Oct. 05, 1993
Filed:
Dec. 11, 1990
Applicant:
Inventors:
Paul T Bennett, Phoenix, AZ (US);
William C Dunn, Mesa, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01P / ;
U.S. Cl.
CPC ...
73510 ; 7351 / ; 7351 / ;
Abstract
An accelerometer in which the seismic mass is formed in the shape of an annulus. The annular shape allows twisting motions as well as displacement of the seismic mass to be sensed and restoring electrostatic forces applied. This allows the supporting spring to be made extremely weak avoiding the mechanical limitations of springs.