Self-checking circuit arrangement for operation of a searchlight

Details Self-checking circuit arrangement for operation of a searchlight Self-checking circuit arrangement for operation of a searchlight

1990-05-25

1991-07-09

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

With signal, indicator, or alarm

Plural signals, indicators, or alarms

340907, 246220, H01J 160

Patent

active

050308866

ABSTRACT:
The circuit arrangement of this invention includes a signal searchlight wherein the lamp is in an electrical series circuit with interlock contact switches. The switches interlock the display color lens such as yellow and green to control the electrical energization of the signal circuit. Logic control switching devices in a remote wayside control box supply signals through a cable to operate a bipolar device to selectively display the desired color.

REFERENCES:
patent: 1610692 (1926-12-01), Logwood
patent: 2178294 (1939-10-01), Young
patent: 2961206 (1960-11-01), Coakley
patent: 3176127 (1965-03-01), Albrighton
patent: 3241003 (1966-03-01), Snell et al.

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