Communications: electrical – Systems – Periodic or flashing
Patent
1989-01-27
1990-08-28
orsino, Joseph A.
Communications: electrical
Systems
Periodic or flashing
315241S, G08B 500
Patent
active
049529064
ABSTRACT:
A strobe light circuit is provided for flashing a strobe flash unit at a desired frequency. An inductor is repetitively connected and disconnected across a d.c. power line by a switch means so that energy is stored in the inductor during the period when the circuit is complete. The flash unit and a capacitor are connected in parallel so that the capacitor can discharge its stored energy to the flash unit when the voltage across the capacitor exceeds the threshold firing voltage of the flash unit. The parallel combination of the flash unit and the capacitor is in turn connected in series with a diode, and the resulting series circuit is connected across the inductor with the diode being connected in polarity such that current will not flow from the power line through the flash unit or the capacitor. The switch means is repetitively cycled so that over the period of each flash cycle the energy supplied to the inductor from said power line while the switch is closes and thence to the capacitor while the switch is open will substantially equal that amount of energy required to charge the capacitor to the threshold firing voltage of the flash unit.
REFERENCES:
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Buyak William P.
Testa Bruce V.
General Signal Corporation
Hubbard Robert R.
Miller, Jr. William G.
Orsino Joseph A.
Swarthout Brent A.
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