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:
Apr. 16, 2002
Filed:
Oct. 18, 2000
Nozomi Toki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Apparatus for detecting the opening and closing angle which is easy to switch, is reliable, is capable of positively preventing howling from occurring, can be reduced in size and weight, and uses no special components. The apparatus comprises a first and second hinge portions belonging to a first and second housings, respectively, for pivotal linking said first housing to said second housing. The first hinge portion has on the lateral side a curved surface in a rotational direction of said first housing and comprises a given number of parallel electrodes extending in a rotational direction of said first housing on said convex curved surface. The curved surface portion is disposed in the second housing; the second housing includes therein terminals in pressure contact with said electrodes or the curved surface; the terminals are in contact or non-contact with corresponding electrodes at different predetermined angles depending on the rotation of the first housing.