GB1340872A - Starting circuits for electric discharge lamps - Google Patents

Starting circuits for electric discharge lamps

Info

Publication number
GB1340872A
GB1340872A GB1340872DA GB1340872A GB 1340872 A GB1340872 A GB 1340872A GB 1340872D A GB1340872D A GB 1340872DA GB 1340872 A GB1340872 A GB 1340872A
Authority
GB
United Kingdom
Prior art keywords
terminals
lamp
reed switch
electric discharge
voltage
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
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.)
SIMPLEX CIRCULUME Ltd
Original Assignee
SIMPLEX CIRCULUME 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 SIMPLEX CIRCULUME Ltd filed Critical SIMPLEX CIRCULUME Ltd
Publication of GB1340872A publication Critical patent/GB1340872A/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

1340872 Starting discharge lamps SIMPLEX-CIRCULUME Ltd 18 Jan 1971 [21 March 1970] 13754/70 Addition to 1210153 Heading H2H A starting circuit for an electric discharge lamp 10 disclosed in Specification 1,210,153 is modified by providing a magnetic reed switch 15 in series with a capacitor 14 across terminals L, N of an A.C. supply, the branch being connected to a tapping B of a choke 12 as shown, the contacts of the reed switch 15 being normally open but closed by magnetic flux in a coil 16 in series with a resistor 17 which are connected across the terminals 11a, 11b of the lamp 10. In operation, prior to ignition of the lamp, the voltage developed across the terminals 11a, 11b, causes, via the operation of the coil 16, the reed contacts to close at or around the maximum voltage of each A.C. half cycle, producing current pulses through the portion AB of the choke 12 and high voltage pulses in the portion BC to ignite the lamp 10. Upon ignition, the voltage across terminals 11a, 11b is insufficient to cause further closing of the reed switch 15.
GB1340872D 1970-03-21 1970-03-21 Starting circuits for electric discharge lamps Expired GB1340872A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1375470 1970-03-21

Publications (1)

Publication Number Publication Date
GB1340872A true GB1340872A (en) 1973-12-19

Family

ID=10028756

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1340872D Expired GB1340872A (en) 1970-03-21 1970-03-21 Starting circuits for electric discharge lamps

Country Status (1)

Country Link
GB (1) GB1340872A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2169760A (en) * 1984-11-12 1986-07-16 Kao Cheng Pi Starter for a fluorescent lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2169760A (en) * 1984-11-12 1986-07-16 Kao Cheng Pi Starter for a fluorescent lamp

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee