Multi-color traffic signal

Details Multi-color traffic signal Multi-color traffic signal

1980-03-24

1981-08-11

Pitts, Harold I.

Communications: electrical

Audible indication

Ultrasonic pest control

3403784, G08B 500

Patent

active

042837162

ABSTRACT:
A multi-color traffic signal in particular for railway line signalling installations, presents for each color a light source comprising a lamp, a collecting optical unit and a fixed chromatic filter. The light sources are connected by means of an optical fiber guide with an irradiating window surface constituting the output optics of the signal. The collecting optical unit comprises, arranged along a same optical axis and at opposite sides of the respective lamp, a curved focalized mirror and a spherical-elliptical lens, arranged so as to focalize the light flux of said lamp on the corresponding input of said optical fiber guide.

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