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:
Oct. 16, 1990
Filed:
May. 24, 1989
Applicant:
Inventors:
Assignee:
Fuji Electric Co., Ltd., Kanagawa, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318696 ; 318685 ;
Abstract
A driving assembly for a horizontally-moving vertically-suspended body, for example a curtain, comprises a moving element disposed in a channel of a rail. The moving element is mounted with an electromagnet which receives either discrete pulses or continuous current for an electrical linear step motor. Coils of the electromagnet produce a magnetomotive force operable to cause a row of pole teeth of the magnet to repulse a corresponding opposed scale connected to the channel, thereby moving the moving element in the channel.