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. 26, 1999
Filed:
Nov. 29, 1995
Paul Bennett, Waterbury, CT (US);
Bruce A Powell, Canton, CT (US);
Samuel C Wan, Simsbury, CT (US);
Anthony Cooney, Unionville, CT (US);
Richard C McCarthy, Simsbury, CT (US);
Joseph Bittar, Avon, CT (US);
Frederick H Barker, Bristol, CT (US);
John K Salmon, deceased, late of South Windsor, CT (US);
LucyMary Salmon, executor, South Windsor, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
To prevent elevator rope stretch effects when a horizontally transferable elevator cab (18) is rolled onto and off of an elevator car frame (10), an elevator car/floor lock (31) includes a bolt (47) which extends across the interface between the car frame and the building and engages a strike (39). Jack screw (44) and solenoid (60) embodiments are shown. To take the weight off the lock bolts so that they may be retracted to permit moving the car frame vertically in the hoistway, strain gages (64, 65) or load sensors (62, 63) provided in or adjacent the bolts sense the weight supported thereby, and a pretorque program (FIG. 6) provides armature current to the hoisting motor to raise or lower the car frame sufficiently to reduce the load on the bolts to nil.