Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1988-05-10
1989-07-11
Shoop, Jr., William M.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187133, B66B 300
Patent
active
048463108
ABSTRACT:
A signal transmission apparatus for an elevator in a multi-story building comprises a small number of signal lines which carry, in a time-shared fashion, hall call signal and hall call registration information for all floors. On each floor, one or more signal terminal means comprises one or more push buttons for entering hall calls and one or more indicator lamps for indicating that a hall call has been registered. A reference signal originates in a control unit and propagates through a ring counter with stages corresponding to each signal terminal means and each separate direction of travel, ascending or descending, supported therein. A signal indicating that a button on a given signal terminal means has been pushed is transmitted over a hall call signal line in synchronization with the reference signal to the control unit. A hall call reference signal generated by the control unit is transmitted over a register line and is received by a signal terminal means to which it was transmitted in synchronization with the reference signal. Error detection and indication circuitry in each signal terminal means detects error conditions which could casue erroneous hall call signal information to be transmitted over the hall call signal line and provides a visual display to permit quick and easy isolation of which of the several data terminal means in the signal transmission system is causing the erroneous hall call signals.
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patent: 4376930 (1983-03-01), Sasao
patent: 4386426 (1983-05-01), Pugh
patent: 4497391 (1985-02-01), Mendelsohn et al.
patent: 4555689 (1985-11-01), Brick et al.
patent: 4639912 (1987-01-01), Tanino
patent: 4683989 (1987-08-01), Pillage et al.
Duncanson Jr. W. E.
Mitsubishi Denki & Kabushiki Kaisha
Shoop Jr. William M.
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