Electric lamp and discharge devices: systems – Condenser in the supply circuit – Condenser in shunt to the load device and the supply
Patent
1982-08-06
1984-12-04
Dixon, Harold
Electric lamp and discharge devices: systems
Condenser in the supply circuit
Condenser in shunt to the load device and the supply
315166, 315241S;241P, H05B 3700
Patent
active
044866917
ABSTRACT:
A method of reliably operating flashlamps with most of the stored energy charged to a voltage below the minimum specified electrode voltage is also disclosed. The flashlamp discharge control method allows reliable operation of the same variable voltage energy storage capacitors with more than a ten-to-one selectable variation of lamp Effective Candella Power for visual signalling. The disclosed dynamic impedance matching method matches the energy storage capacitors to the lamp after the three terminal flashlamp is triggered to its manufacturers' specified "on" state in the conventional fashion. When the lamp's main discharge voltage becomes lower than the voltage of the more principal energy storage capacitors, discharge of those capacitors is begun, usually through a semi-conductor rectifier operated within its integrated limits. The more principal energy storage capacitors may be charged with constant energy rather than at constant voltage, so that, for a constant Effective Candella Power, varying capacitances such as are found in electrolytic capacitors may be used with significant savings in size, weight and cost.
REFERENCES:
patent: 2922079 (1960-01-01), Borchers et al.
patent: 3007081 (1961-10-01), Sebastian
patent: 3238415 (1966-03-01), Turner
patent: 3376470 (1968-04-01), Stone et al.
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