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:
Apr. 23, 1996
Filed:
Jan. 13, 1995
Rudolph Steger, West Hartford, CT (US);
Chester J Slabinski, New Hartford, CT (US);
Michael Garfinkel, West Hartford, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
An arrangement for detecting elevator car position relative to a floor landing includes an optical potentiometer associated with both the elevator car and the interior of an elevator hoistway. One portion of the potentiometer is attached to the elevator car, while the other portion of the potentiometer is fixed within the hoistway. Car position is ascertained by illuminating portions of a fluorescent fiber optical cable and then reading electrical signals outputted by photodetectors at either end of the cable. The difference between the electrical signals corresponds to the distance of the elevator car from the landing.