Elevator car call buttons indicating car floor position
Patent 5969306 Issued on October 19, 1999. Estimated Expiration Date: 
March 26, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 26, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesElevator control switch and position indicator assembly Elevator call buttons having plural illuminated indications of availability and use Patent #: 5454448 InventorsAssigneeApplicationNo. 048540 filed on 03/26/1998US Classes:187/395, HAVING CALL BUTTON WITH INDICATOR187/399Indicates existing locationExaminersPrimary: Nappi, Robert E.Foreign Patent References
International ClassesB66B 001/34B66B 003/02 AbstractRegistered car calls are indicated in the car call buttons of an elevator car operating panel by illuminating one of the car call buttons with a first illumination characteristic, and the floor position of the elevator car within the building is indicated by illuminating any of the same car call buttons with a second illumination characteristic, different from the first illumination characteristic. One part of the car call button (such as the center) may be used to indicate registered car calls and another part of the car call button (such as the ring) may be used to indicate car position (or vice versa). Registered car calls may be indicated by steady or invariant illumination from the car call button while car position is indicated by illuminating the appropriate car call button with flashing illumination. Colors may also be used. | |
