Contact-controlled capacitive switching apparatus

Details Contact-controlled capacitive switching apparatus Contact-controlled capacitive switching apparatus

1982-11-16

1984-04-03

Miller, Jr., George H.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

340593, 340594, 187 29R, B66B 1324

Patent

active

044410344

ABSTRACT:
A contact-controlled capacitive switching means utilized as a floor or cabin calling transmitter for lifts or the like is designed such that travel or drive commands for the lift are prevented from being generated by the action of heat or, if generated, from being further transmitted to a lift control system. Therefore, a thermal circuit breaker is interconnected between an actuating element, such as a contact button and a coupling member connected to an input of an oscillator. The thermal circuit breaker may be mounted directly at the contact button or at a mounting plate carrying the contact button. A further thermal circuit breaker is interconnected between an output of the switching means and a connection terminal of a signal transmitting line of the lift control system.

REFERENCES:
patent: 3726364 (1973-04-01), Citrin et al.
patent: 3773145 (1973-11-01), Drexler

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