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:
Mar. 16, 2004
Filed:
Jul. 21, 1999
Vlad Zaharia, Rocky Hill, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
Directionally sensitive motion detectors at the entrances to elevator cars provide a running count of passenger population aboard the cars. Passengers wear portable devices that transmit personal IDs, and a check of IDs of passengers on the elevator along with the total passenger count will determine if each of the passengers exiting the elevator corresponds to an ID authorized to enter a particular floor of the building, or determine if each of the passengers aboard the car corresponds to an ID authorized to make a particular trip (the particular elevator at a particular time). Unauthorized exit may cause an alarm or other events. If any passenger does not have an ID authorized for a secure trip, an announcement urges the unauthorized passenger to leave for some period of time, following which an alarm is sounded and the elevator is prevented from moving. Pairs of motion detectors may provide directional sensitivity, or doppler motion detectors may be used.