Traffic signal device with interchangeable lamps

Details Traffic signal device with interchangeable lamps Traffic signal device with interchangeable lamps

1993-03-25

1995-04-18

Peng, John K.

Communications: electrical

Traffic control indicator

340916, 340925, 340931, 340480, 340482, 340487, 116 63R, G08G 100

Patent

active

054082323

ABSTRACT:
A traffic signal device having a single, continuously-illuminating lamp and several plain reflectors constructed by optical thin film technique to receive the light beam projected from the lamp and respectively reflecting light components of pre-determined wavelengths to display differently-colored traffic signals. Also, is a lamp detection system which monitors and detects the operation of the lamp and generates a signal to actuate the lamp interchanging mechanism to automatically replace the lamp with a spare lamp once the lamp malfunctions.

REFERENCES:
patent: 2557531 (1951-06-01), Blanchet
patent: 3618005 (1971-11-01), Jensen
patent: 3688259 (1972-08-01), Robillt
patent: 4851832 (1989-07-01), Graf
patent: 4857920 (1989-08-01), Kataoka et al.
patent: 4954822 (1990-09-01), Borenstein
patent: 5136287 (1992-08-01), Borenstein

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