Controller for signalling system

Details Controller for signalling system Controller for signalling system

1978-05-05

1980-09-30

Caldwell, Sr., John W.

Communications: electrical

Systems

Audible signals

340384E, 340327, 340377, 3403091, 307247A, 328129, G08B 300, G08B 500

Patent

active

042258537

ABSTRACT:
A signalling device for use in a public transportation vehicle. The signalling device includes a cord, or other device by which a passenger on the vehicle can signal the driver, and a device for generating a signal, normally a buzzer. A control circuit senses the actuation of the passenger's device and controls the energization of the signal generating device. The pattern of the signals may take any of several forms.

REFERENCES:
patent: 3636549 (1972-01-01), Berman et al.
patent: 3744022 (1973-07-01), Olsen
patent: 3792468 (1974-02-01), Bryan
patent: 3989960 (1976-11-01), Kodama
patent: 4030284 (1977-06-01), Portman
patent: 4112764 (1978-09-01), Turner

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