GB806185A - Improvements in and relating to starting devices for fluorescent tubes - Google Patents

Improvements in and relating to starting devices for fluorescent tubes

Info

Publication number
GB806185A
GB806185A GB9713/57A GB971357A GB806185A GB 806185 A GB806185 A GB 806185A GB 9713/57 A GB9713/57 A GB 9713/57A GB 971357 A GB971357 A GB 971357A GB 806185 A GB806185 A GB 806185A
Authority
GB
United Kingdom
Prior art keywords
coil
resistor
contacts
circuits
circuit
Prior art date
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
GB9713/57A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB806185A publication Critical patent/GB806185A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • 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
    • H05B41/10—Starting switches magnetic only

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

806,185. Supply systems for discharge lamps. LEUENBERGER, H. March 25, 1957 [March 27, 1956], No. 9713/57. Class 38 (4). A two-terminal starting switch for fluorescent tubes comprises three circuits. The first circuit comprises a coil 12 of relay 12-17, a contact 18 and resistor 19 connected in series with heaters 4, 5 of lamp 1. Closing switch 8 energizes coil 12, closing contacts 17 connecting the second circuit, comprising opposing coil 13, negative coefficient resistor 21 and bi-metal 22, also the third circuit comprising positive coefficient resistor 23. The shunting effect of the second and third circuits reduces the current through coil 12, but armature 15 is held by remanent magnetism. As resistor 21 heats, the demagnetizing effect of coil 13 increases and contact 17 opens. In the event of several false starts, contacts 18 open to enable contacts 17 to cool between switching operations. The total current through the second and third circuits remains approximately constant due to the opposite characteristics of resistors 22, 23.
GB9713/57A 1956-03-27 1957-03-25 Improvements in and relating to starting devices for fluorescent tubes Expired GB806185A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH806185X 1956-03-27

Publications (1)

Publication Number Publication Date
GB806185A true GB806185A (en) 1958-12-23

Family

ID=4538088

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9713/57A Expired GB806185A (en) 1956-03-27 1957-03-25 Improvements in and relating to starting devices for fluorescent tubes

Country Status (1)

Country Link
GB (1) GB806185A (en)

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