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:
May. 16, 1997
Eric K Jamieson, Farmington, CT (US);
Thomas He, Unionville, CT (US);
Daniel S Williams, Meriden, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
A dual magnet controller, as part of an active roller guide (ARG) controller, that requires that each controlled actuator produce at least a minimum idling force, rather than carrying a minimum idling current. The dual magnet controller for a particular control axis determines force commands for its pair of actuators based on the actuators in combination having to produce a net force, and each actuator independently having to produce a force equal in magnitude at least to a pre-determined minimum idling force. The net force may be calculated by other elements of the ARG controller and communicated as input to the dual magnet controller.