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:
Nov. 10, 1981
Filed:
Dec. 27, 1979
Joseph Bittar, Simsbury, CT (US);
J Mark Deric, Johnson City, TN (US);
Otis Elevator Company, Hartford, CT (US);
Abstract
An elevator system includes a microprocessor-based cab controller mounted directly on an elevator car. The activity of passenger-actuatable switches within the elevator car, such as car call, open door, emergency stop switches, and the like, is monitored as an indication of the presence of passengers within the elevator car. Without such activity, the car is determined, preliminarily, to be empty. If the conditions exist for a period of time, the car is determined to be really empty, in a second level determination of the empty status of the car. The utilization of passenger load weight, along with passenger actuatable switch activity, is also disclosed as a determination of the empty status of the car. An exemplary elevator system, an exemplary microprocessor-based controller, and a logic flowchart illustrative of the details of the invention are disclosed herein.