Electric lamp and discharge devices: systems – Automatic substitution of the power supply – With load device or electrode substitution
Patent
1980-01-30
1982-04-06
Chatmon, Jr., Saxfield
Electric lamp and discharge devices: systems
Automatic substitution of the power supply
With load device or electrode substitution
315 92, 315205, 315DIG7, H05B 3910, H05B 4146
Patent
active
043238211
ABSTRACT:
A converter circuit for use in changing a series wired primary ballast normally employed for operating a mercury vapor lamp to a more energy-efficient high intensity discharge lamp, such as a high pressure sodium lamp, with the circuitry involved incorporating the series type ballasts that usually have operating characteristics for operating a 400 watt and a 175 watt lamp, with the secondary of each ballast comprising isolated neutral secondary winding. These are primary loop series wired ballasts which are controlled by regulators of a constant current type and dimensioned for operating at a 2400 volts ac open circuit voltage class functioning at 60 Hz. The converter circuit can be connected into a previously installed lamp fixture by incorporating it into its secondary circuit, of the series ballast, with the said converter circuit comprising a silicon controlled rectifier switching circuit and a trigger circuit to provide the necessary direct current pulse train for operation of the aforesaid high pressure sodium type lamp.
REFERENCES:
patent: 3401265 (1968-09-01), Dotto
patent: 3889152 (1975-06-01), Bodine, Jr. et al.
patent: 3896369 (1975-07-01), Nakata
patent: 3900763 (1975-08-01), Turner
patent: 3917976 (1975-11-01), Nuckolls
patent: 4005336 (1977-01-01), Casella
patent: 4072878 (1978-02-01), Engel et al.
patent: 4092564 (1978-05-01), Soleau
patent: 4194143 (1980-03-01), Farkas et al.
Central Electrical Company
Chatmon, Jr. Saxfield
Denk Paul M.
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