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:
Jan. 24, 1995
Filed:
Feb. 16, 1993
Applicant:
Inventors:
Assignee:
Otis Elevator Company, Farmington, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66B / ;
U.S. Cl.
CPC ...
187316 ; 388842 ;
Abstract
The present invention solves the problem of discontinuous operation of an elevator door, depending upon the operating point of the door at the time of the reversal command, by a digital control technique which uses as a reference signal for the adaptation, the velocity dictation coming from a profile generator. This gives an information concerning the actual operating point. The adaptation of the controller parameters is made with respect to the signal.