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:
Aug. 15, 1989
Filed:
Dec. 29, 1987
Katsuji Minami, Osaka, JP;
Shinichi Murata, Yao, JP;
Susumu Tsujimoto, Fujiidera, JP;
Yukinori Matuzaki, Yao, JP;
Shogo Yukawa, Osaka, JP;
Susumu Osaka, Machida, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Kabushiki Kaisha Nichibei, Tokyo, JP;
Abstract
When a raising switch (21) or a lowering switch (23) is operated in an electric blind apparatus, an MPU (34) rotates a geared motor (4) so that a take drum (37) winds up or unwinds a lifting tape (10) to raise/lower vanes (13) of a blind. Upon rotation of the take-up drum, a photointerrupter (38) generates pulse signals and the MPU counts the pulse signals to judge a vertical position of the blind. When an opening or closing switch (24, 26) is operated, the MPU rotates the geared motor so that a ladder drum (39) is followingly rotated to wind up one of ladder cords (11) fixed to the ladder drum, thereby to adjust an open/close angle of the vanes. Following rotation of the ladder drum, a photointerrrupter (41) supplies pulse signals to the MPU, which in turn counts the pulse signals to judge the open/close angle of the vanes.