GB1530271A - Thermal starter switches used in electric discharge lamp operating circuits - Google Patents

Thermal starter switches used in electric discharge lamp operating circuits

Info

Publication number
GB1530271A
GB1530271A GB698575A GB698575A GB1530271A GB 1530271 A GB1530271 A GB 1530271A GB 698575 A GB698575 A GB 698575A GB 698575 A GB698575 A GB 698575A GB 1530271 A GB1530271 A GB 1530271A
Authority
GB
United Kingdom
Prior art keywords
heaters
lamp
switch
pin
secured
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
GB698575A
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.)
Salford Electrical Instruments Ltd
Original Assignee
Salford Electrical Instruments 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 Salford Electrical Instruments Ltd filed Critical Salford Electrical Instruments Ltd
Priority to GB698575A priority Critical patent/GB1530271A/en
Publication of GB1530271A publication Critical patent/GB1530271A/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
    • H05B41/06—Starting switches thermal only

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

1530271 Starting discharge lamps SALFORD ELECTRICAL INSTRUMENTS Ltd 13 Feb 1976 [19 Feb 1975] 6985/75 Heading H2H [Also in Division H1] A thermal starter switch 1 for an electric discharge lamp 14 comprises a pair of heaters 2, 3 connected or connectible in series with switch contacts 5 (22, 23 in Fig. 2) and terminals 7, 8, 9 (16, 17, 18 in Fig. 2) enabling the current to flow through the series connected heaters 2, 3 and switch contacts at the time of starting and through one of the heaters 2 only during running of the lamp 14. The heaters 2, 3 each consist of a helix of resistance wire, one 2 being secured between terminal pins 16, 17 (7, 8) projecting from a ceramic base 20 and the other 3 being secured between a pin 19 and a terminal pin 18 (9). The pin 19 carries a fixed contact 23 which is engageable with a contact 22 on a bimetal strip 4 secured to the terminal pin 17(8). The switch is evacuated or gas-filled. When a voltage is connected across input terminals 10, 11, current flows through a ballast choke 15, the heaters 2, 3 and the bimetal 4 which is heated by the heaters 23, carrying the contacts 22, 23(5) to open whereupon the lamp 14 is lit by a high voltage pulse generated across the choke 15. During normal running of the lamp 14, the lamp current flows through the heater 2 which maintains the switch contacts 22, 23 open. The switch is provided with an additional terminal (8<SP>1</SP>) (Fig. 4, not shown) if it is to be used for a lamp with heated electrodes (24, 25).
GB698575A 1976-02-13 1976-02-13 Thermal starter switches used in electric discharge lamp operating circuits Expired GB1530271A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB698575A GB1530271A (en) 1976-02-13 1976-02-13 Thermal starter switches used in electric discharge lamp operating circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB698575A GB1530271A (en) 1976-02-13 1976-02-13 Thermal starter switches used in electric discharge lamp operating circuits

Publications (1)

Publication Number Publication Date
GB1530271A true GB1530271A (en) 1978-10-25

Family

ID=9824453

Family Applications (1)

Application Number Title Priority Date Filing Date
GB698575A Expired GB1530271A (en) 1976-02-13 1976-02-13 Thermal starter switches used in electric discharge lamp operating circuits

Country Status (1)

Country Link
GB (1) GB1530271A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2181601A (en) * 1985-10-14 1987-04-23 Omp Off Meccano Plast Over-current protection device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2181601A (en) * 1985-10-14 1987-04-23 Omp Off Meccano Plast Over-current protection device
FR2589293A1 (en) * 1985-10-14 1987-04-30 Omp Off Meccano Plast PROTECTION DEVICE FOR AN ELECTRIC MOTOR, PARTICULARLY FOR THE COMPRESSOR MOTOR OF A REFRIGERATION MACHINE
GB2181601B (en) * 1985-10-14 1989-06-07 Omp Off Meccano Plast A protection device for an electric motor

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Legal Events

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