Device for regulating the power in electrical apparatuses, espec

Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Silicon controlled rectifier ignition

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315DIG4, 315DIG5, 315DIG7, 315224, 315225, 315207, H05B 3702, H05B 3904, H05B 4136

Patent

active

044608497

ABSTRACT:
The invention relates to a device for regulating the power in electrical apparatuses, especially fluorescent lighting fittings. To each apparatus (6) is connected an inverter (1-5, 7-11; 12; 13) in which the control circuit of the oscillator transistor (1) is provided with an adjustable RC circuit (8, 9).
The power of a plurality of apparatuses included in the same group can be adjusted through one pair of conductors by connecting in parallel with the RC circuit (8, 9), on one hand, the contacts of a relay (10) and, on the other hand, an opto-insulator (11) whereby the relay (10) is connected to one conductor of the pair of conductors and the opto-insulator (11) to the other conductor.

REFERENCES:
patent: 3774074 (1973-11-01), Souvay
patent: 4051410 (1977-09-01), Knoble
patent: 4150323 (1979-04-01), Yeh et al.
patent: 4228382 (1980-10-01), Virtanen
patent: 4286195 (1981-08-01), Swinea, Jr.
patent: 4319164 (1982-03-01), Tulleners

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