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. 19, 1993
Filed:
May. 22, 1991
Copal Company Limited, Tokyo, JP;
Abstract
The acceleration sensor has a first stationary substrate having a stationary electrode and a second stationary substrate having another stationary electrode and being opposed to the first stationary substrate with a given spacing. An electrically conductive diaphragm is disposed in the spacing and has a central segment fixed in the spacing through the pair of stationary substrates and a peripheral segment surrounding around and extending resiliently from the central segment to undergo displacement in the spacing relative to the stationary electrodes in response to an external acceleration force. The peripheral segment and the opposed stationary electrodes form variable capacitors effective to produce a capacitance change in response to the displacement of the peripheral segment to detect the external acceleration force.