Multi-color traffic signal

Details Multi-color traffic signal Multi-color traffic signal

1981-09-17

1987-01-13

Corbin, John K.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340 47, 116 49, G02B 2714, B61L 1500, B60Q 126

Patent

active

046360360

ABSTRACT:
The multi-color traffic signal for railways comprises for each one of the three colors a projector unit consisting of a lamp, an optical unit and a chromatic filter. The projector units are connected to an irradiating output optics by means of an optical channel system consisting of a main rectilinear channel presenting at one end the irradiating output optics and at the other end a first projector unit in axial alignment with the main channel. A second and third projector units are housed in transverse channels at 90.degree. with respect to the main channel and open thereinto. A first dichroic mirror is arranged in the main channel with an angle of 45.degree. in correspondence with the outlet of the transverse channel of the second projector unit and a second dichroic mirror is arranged in the main channel with an angle of 45.degree. in correspondence with the outlet of the transverse channel of the third projector unit.

REFERENCES:
patent: 1498184 (1921-05-01), McCarthy
patent: 3601470 (1971-08-01), Juhlin
patent: 4046476 (1977-09-01), Charamella et al.

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