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:
Jul. 31, 1984
Filed:
Apr. 12, 1982
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A speed sensor device incorporates a reed switch which is controlled by the changes in the density of the magnetic flux in response to the displacement of a permanent magnet. The device comprises at least one permanent magnet positioned on a rotational shaft, a reed switch opened and closed in response to the rotational displacement of the permanent magnet, an elastic member protecting the periphery of the reed switch, a body member being made of a material having excellent electric conduction and receiving the reed switch, a supporter being in a thin plate form and also being made of a material having excellent electric conduction, and a projection formed on the supporter serving to secure the supporter to the body member.