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:
Mar. 23, 1999
Filed:
Dec. 22, 1997
Applicant:
Inventors:
Richard J Ericson, Southington, CT (US);
Hugh J O'Donnell, Longmeadow, MA (US);
Thomas J Hoffman, Unionville, CT (US);
Assignee:
Otis Elevator Company, Farmington, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66B / ;
U.S. Cl.
CPC ...
187393 ; 187391 ;
Abstract
An elevator rope speed monitoring assembly is disclosed. The rope speed monitoring assembly includes a plurality of sensors that monitor the movement of the individual ropes. The sensors output a signal indicative of the speed of the movement of the ropes. A controller compares the relative movement of the ropes and generates a warning signal if a sufficient deviation between relative rope speeds is detected.