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. 05, 1982
Filed:
Dec. 27, 1979
J Mark Deric, Johnson City, TN (US);
Otis Elevator Company, Hartford, CT (US);
Abstract
An elevator includes a microprocessor-based cab controller mounted on the elevator car to monitor calls for service by passengers in the car, such as are registered on car call buttons requesting stops at specific floors, door open and door close buttons and the like, controls the opening and closing of the door, monitors the position of the car relative to an adjacent landing and communicates with a microprocessor-based car controller which is disposed at the top of the shaftway and controls the motion of the car in the shaftway and provides commands to the cab controller, such as door opening and closing demands relating to hall calls at the landings, and the like. In the event that the cab controller determines that it cannot rely on communications between it and the car controller, the cab controller operates in an autonomous mode in which it will accept the presence of the car near a landing for a predetermined time as an indication that the car door may be open to allow passengers to escape, open the door, shuts off the lights in the car and sounds a buzzer to frighten passengers out of the car, and after the door is open for a period of time, closes the door and determines if the car is empty. If it is not empty, it again commands the door to open, shuts off the lights and sounds a buzzer. When it determines that the car is empty, the cab controller leaves the car parked with the lights off, but in a condition to be moved if the car controller desires to move it. An exemplary elevator system, including an exemplary microprocessor-based cab controller, a general door control program flowchart, illustrative of a system in which the present invention may be practiced, and detailed apparatus and flowcharts for practicing the present invention, are disclosed.