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:
May. 19, 2009
Filed:
Oct. 31, 2006
Akira Yamaura, Hitachi, JP;
Yoshikazu Hayakawa, Hitachi, JP;
Tatsuya Ohtaka, Hitachi, JP;
Takashi Aoyama, Hitachi, JP;
Tomiya Abe, Hitachi, JP;
Masaaki Shimizu, Toyohashi, JP;
Manabu Kato, Hamamatsu, JP;
Akira Yamaura, Hitachi, JP;
Yoshikazu Hayakawa, Hitachi, JP;
Tatsuya Ohtaka, Hitachi, JP;
Takashi Aoyama, Hitachi, JP;
Tomiya Abe, Hitachi, JP;
Masaaki Shimizu, Toyohashi, JP;
Manabu Kato, Hamamatsu, JP;
Hitachi Cable, Ltd., Tokyo, JP;
ASMO Co., Ltd., Kosai, JP;
Abstract
A cord switchhas wire electrodesA,B spirally arranged along an inner surface of a hollow partof a hollowed insulatorin a longitudinal direction such that the wire electrodes do not electrically contact with each other, an outer electrodeprovided around an outer periphery surface of the hollowed insulatorand jacketed with an insulating layer. An electrostatic capacitance is formed between the outer electrodeand a wire electrode for grounding, and a floating electrostatic capacitance is formed between the outer electrodeand the earth. The close approach of the human body to the cord switchcan be detected in a non-contact manner by measuring the alteration in the electrostatic capacitance.