Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Plural load device systems
Patent
1980-05-16
1982-04-06
La Roche, Eugene R.
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Plural load device systems
315258, 315276, 315283, 315DIG5, H05B 4123
Patent
active
043238238
ABSTRACT:
Unitary ballast structure for starting and operating four fluorescent lamps comprising stacked magnetic iron laminations and coils retained thereon to provide two separate inductor means and a transformer means for heating multiple lamp electrode coils. The magnetic structure comprises a core member having a shell-type configuration with two main legs and six coil legs which define five coil-receiving windows. Coils retained on the second and third coil legs each comprise inductor means and occupy the first, second and third windows. An electrode-coil-heating transformer means is retained on the fifth coil leg and occupies the fourth and fifth windows. Each of the laminations which comprise the magnetic structure can have the same configuration which facilitates manufacture. Magnetic coupling between the different electrical components comprising the ballast structure is minimized, while still providing a compact, unitary ballast.
REFERENCES:
patent: 2404254 (1946-07-01), Short
patent: 2620459 (1952-12-01), Sawyer et al.
patent: 2685662 (1954-08-01), Feinberg et al.
patent: 3059143 (1962-10-01), Sola
patent: 4006384 (1977-02-01), Elms et al.
patent: 4213076 (1980-07-01), Walz
La Roche Eugene R.
Palmer W. D.
Westinghouse Electric Corp.
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