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Current content: 155 519 367 patent documents

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123 361 new documents added

1 354 331 documents amended

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EP 0075774 A3 19830727 - ELECTRONIC BALLAST FOR AT LEAST ONE FLUORESCENT LAMP

Title (en)

ELECTRONIC BALLAST FOR AT LEAST ONE FLUORESCENT LAMP

Publication

EP 0075774 A3 19830727 (DE)

Application

EP 82108398 A 19820911

Priority

DE 3137940 A 19810924

Abstract (en)

[origin: EP0075774A2] The ballast has a series oscillator (17, 18), the capacitor (18) of which is connected in parallel with the fluorescent lamp (14). The current supply to the series oscillator (17, 18) takes place via a coil (22) controlled by a single electronic switching element (21) which switches on and off as a function of the oscillator current. <IMAGE>

IPC 1-7

H05B 41/29

IPC 8 full level

H05B 41/04 (2006.01); H05B 41/28 (2006.01)

CPC (source: EP)

H05B 41/046 (2013.01); H05B 41/28 (2013.01)

Citation (search report)

DE 1764624 B2 19741017
US 3710177 A 19730109 - WARD R
US 3882354 A 19750506 - MAY RANDALL L

Designated contracting state (EPC)

AT BE DE FR GB IT NL

DOCDB simple family (publication)

EP 0075774 A2 19830406; EP 0075774 A3 19830727; DE 3137940 A1 19830407; DE 3137940 C2 19850829

DOCDB simple family (application)

EP 82108398 A 19820911; DE 3137940 A 19810924