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:
Aug. 23, 2016
Filed:
Apr. 15, 2011
Kyle W. Rogers, Farmington, CT (US);
Daryl J. Marvin, Farmington, CT (US);
Kyle W. Rogers, Farmington, CT (US);
Daryl J. Marvin, Farmington, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
An exemplary elevator control system includes an elevator drive. A safety chain is configured to monitor at least one condition of a selected elevator system component. A first switch is operable to interrupt power supply to the elevator drive. The first switch is controlled by the safety chain depending on the monitored condition. A second switch is in series with the first switch. The second switch is operable to interrupt power supply to the elevator drive. The second switch is controlled by the safety chain depending on the monitored condition. A monitoring device is configured to determine when the first and second switches should be in a power supplying condition for supplying power to the elevator drive. One such circumstance is when it is desirable to cause movement of the elevator car. The monitoring device determines that the first switch is in the power supplying condition for allowing the safety chain to control the second switch for supplying power to the elevator drive. The monitoring device determines whether the second switch is in a power supplying condition when the first switch is properly in the power supply condition. The monitoring device is configured to prevent the elevator drive from being powered whenever it determines that either the first switch or the second switch is not in a desired condition.