Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3692956A
Inventor
Maurice George Clark
Herbert Lawrence Privett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Associated Electrical Industries LtdfiledCriticalAssociated Electrical Industries Ltd
Priority to GB3692956ApriorityCriticalpatent/GB869136A/en
Publication of GB869136ApublicationCriticalpatent/GB869136A/en
H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
H05B41/02—Details
H05B41/04—Starting switches
Landscapes
Circuit Arrangements For Discharge Lamps
(AREA)
Abstract
869,136. Discharge lamp circuits. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Nov. 25, 1957 [Dec. 3, 1956], No. 36929/56. Class 38 (4). In a circuit for operating in series a plurality of fluorescent lamps 1 having indirectly-heated electrodes, the series or parallel connected heaters 4 are disconnected from an A.C. supply 8, 9 by a switch 10 opened by the passage of heater current through a thermal element 5, the subsequent discharge current through electrodes 3 maintaining the switch open. The circuit is completed by a choke 7 and power factor capacitor 11. A further impedance may be included in series with the heaters.
GB3692956A1956-12-031956-12-03Improvements in operating circuits for low-pressure electric discharge lamps
ExpiredGB869136A
(en)