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:
Feb. 19, 1991
Filed:
May. 24, 1989
Daisuke Hata, Funabashi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A position detecting apparatus electrically detects the present position of a moving body reciprocated within a movable region. The apparatus comprises a resistance section continuously disposed by a predetermined length along the reciprocating direction within a detecting region corresponding to the movable region on a substrate composed of an insulator. A plurality of region discriminating patterns are formed by combining a conductive section discontinuously disposed by a predetermined length along the reciprocating direction within the detecting region on the substrate, and an insulating section having no conductor. An electric brush is provided which is connected to the moving body and reciprocated within the detecting region in a state in which the brush slidably contacts the resistance section and the plurality of region discriminating pattern section. A first position detector detects the position of the moving body based on a resistance value corresponding to the position of the brush when the brush is located on the resistance section. A second position detector detects the position of the moving body by detecting a predetermined kind of combination of the conductive section and the insulating section when the brush is located on the region discriminating pattern sections; both the resistance section and the region discriminating pattern sections are disposed on the substrate. Another position detecting apparatus may be used by electrically detecting the present position of the moving body reciprocated within the movable region.