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. 28, 2020
Filed:
Sep. 26, 2018
Applicant:
Otis Elevator Company, Farmington, CT (US);
Inventors:
Joseph Zacchio, Wethersfield, CT (US);
Teems E. Lovett, Glastonbury, CT (US);
Paul R. Braunwart, Hebron, CT (US);
Assignee:
OTIS ELEVATOR COMPANY, Farmington, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B 21/18 (2006.01); G01R 31/11 (2006.01);
U.S. Cl.
CPC ...
G08B 21/182 (2013.01); G01R 31/11 (2013.01);
Abstract
A method of examining an electrical safety chain of an elevator system including: emitting an electric pulse from a time-domain reflectometer into an electrical safety chain of an elevator system; detecting a reflected electric pulse reflected within the electrical safety chain using the time-domain reflectometer; comparing the reflected electric pulse to a baseline reflected electric pulse; and determining a degradation level in response to the reflected electric pulse and the baseline reflected electric pulse.