B - Operations – Transporting – 66 – B
Patent
B - Operations, Transporting
66
B
B66B 1/24 (2006.01) B66B 1/34 (2006.01) B66B 1/46 (2006.01)
Patent
CA 2196731
An apparatus for scanning and illuminating elevator car call button switches includes an individual switch and illumination circuit for each floor served by the car and a control circuit connected in a row/column matrix with the individual circuits for scanning for actuated switches and illuminating push buttons associated with registered calls. Each individual circuit has a switch module which responds to scanning signals from the control circuit by generating a switch actuated signal when the call button switch located therein is actuated. The control circuit generates illumination signals to each individual circuit for which a call has been registered to activate LED's and light the associated push button. The control circuit generates the scanning signal, reads the switch actuated signals and generates the illumination signals during separate timed cycles. A pulse stretcher module in the individual circuits responds to the illumination signals to maintain the LED's lighted for a significantly longer time than the duration of the timed cycles. The switch and illumination circuit and the control circuit cooperate to generate and respond to different magnitude switch actuated signals when an access control switch is utilized to lock out selected floors.
Ag Inventio
Riches Mckenzie & Herbert Llp
LandOfFree
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