Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Transformer in the supply circuit
Patent
1979-01-31
1980-07-08
La Roche, Eugene R.
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Transformer in the supply circuit
315239, 315244, 315247, 336105, 336213, 361270, H05B 4116
Patent
active
042119570
ABSTRACT:
The magnetic core of a lamp ballast is bifilar wound from inherently thin amorphous metal strip and utilizes the laminations of the magnetic circuit as the plates of a capacitor. The outer yoke of the core encases the coils and is edge-wound from amorphous metal ribbon alternated with insulation to also be the power factor capacitor. The inner core is accordion-pleated or spirally wound and is electrically connected to be the starting capacitor. Cutaways in the inner core cause saturation and shape the lamp current waveform.
REFERENCES:
patent: 2521513 (1950-09-01), Gray
patent: 2962679 (1960-11-01), Stratton
patent: 3188505 (1965-06-01), Wiley
patent: 3215910 (1965-11-01), Schilling
patent: 4116728 (1978-09-01), Becker et al.
patent: 4127891 (1978-11-01), Rayburn
Reeves, Choke-Capacitor Hybrid as a Fluorescent Lamp Ballast, Proc. IEE, vol. 122, No. 10, Oct. 1975, pp. 1151-1152.
Gray et al., Principles and Practices of Electrical Engineering, McGraw-Hill, 1947, p. 300.
Alley Robert P.
Haller Theodore R.
Tompkins Russell E.
Campbell Donald R.
Davis James C.
General Electric Company
La Roche Eugene R.
Snyder Marvin
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