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:
Nov. 17, 1992
Filed:
Jul. 25, 1991
Takata Corporation, Tokyo, JP;
Abstract
An acceleration sensor comprising a cylinder of a conductive material, a magnetized inertial member mounted in the cylinder so as to be movable longitudinally of the cylinder, a conductive member mounted at least on an end surface of the inertial member that is on a side of one longitudinal end of the cylinder, a pair of electrodes disposed at this one longitudinal end of the cylinder, and an attracting member disposed on a supporting device near the other longitudinal end of the cylinder. When the conductive member of the inertial member comes into contact with the electrodes, these electrodes are caused to conduct via the conductive member. The attracting member is made of a magnetic material such that the attracting member and the inertial member are magnetically attracted toward each other. The magnetized inertial member comprises a core including a cylindrical permanent magnet, a hard plating layer formed on the curved surface of the core, and a conductive plating layer formed at an end surface of the core that is located on a side of the electrodes. Another magnetized inertial member comprises a cylindrical core including a permanent magnet, a synthetic resin layer enclosing the curved surface of the core, and a conductive plating layer formed on the end surface of the core that is located on the side of the electrodes.