H - Electricity – 05 – B
Patent
H - Electricity
05
B
340/58
H05B 41/34 (2006.01)
Patent
CA 1235210
ABSTRACT A warning system for emergency vehicles having one or more flash tubes which are flashed in rapid succession during an interval of 30-90 milliseconds to appear as a single flash. A pair of silicon controlled rectifiers are rendered successively conductive to discharge a pair of capacitors for causing the flashes of the flash tube. The interval between the conduction periods of the silicon controlled rectifiers is controlled by a timer device.
459364
Eggers Frederick W.
Mcconnell Michael V.
Federal Signal Corporation
Macrae & Co.
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