GB855937A - Improvements in or relating to circuit arrangements for operating electric lamps - Google Patents

Improvements in or relating to circuit arrangements for operating electric lamps

Info

Publication number
GB855937A
GB855937A GB845758A GB845758A GB855937A GB 855937 A GB855937 A GB 855937A GB 845758 A GB845758 A GB 845758A GB 845758 A GB845758 A GB 845758A GB 855937 A GB855937 A GB 855937A
Authority
GB
United Kingdom
Prior art keywords
lamp
operate
cause
relating
circuit arrangements
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
GB845758A
Inventor
Julius Cates
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB845758A priority Critical patent/GB855937A/en
Publication of GB855937A publication Critical patent/GB855937A/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
    • H05B41/14—Circuit arrangements
    • H05B41/46—Circuits providing for substitution in case of failure of the lamp

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

855,937. Supply arrangements for space discharge lamps. GENERAL ELECTRIC CO. Ltd. March 6, 1959 [March 17, 1958], No. 8457/58. Class 38 (4). A circuit arrangement for space discharge lamps is arranged so that a lamp 2 functions as a stand-by lamp which is automatically illuminated upon failure of a main lamp 1. When an alternating current supply is applied to terminals 3, 4 the secondary windings 8, 9 of a transformer 7, 8, 9 cause the electrodes of the lamp 1 to become heated such that the lamp strikes and continues to operate with the aid of a ballast 5. When the lamp 1 is running the voltage thereacross is insufficient to cause a glow starter switch of the stand-by lamp 2 to operate thus preventing the lamp 2 from striking. Should, however, the main lamp 1 not strike or, if running, fail, the glow starter switch will operate to cause the lamp 2 to strike and become illuminated. The ballast may be capacitive.
GB845758A 1958-03-17 1958-03-17 Improvements in or relating to circuit arrangements for operating electric lamps Expired GB855937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB845758A GB855937A (en) 1958-03-17 1958-03-17 Improvements in or relating to circuit arrangements for operating electric lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB845758A GB855937A (en) 1958-03-17 1958-03-17 Improvements in or relating to circuit arrangements for operating electric lamps

Publications (1)

Publication Number Publication Date
GB855937A true GB855937A (en) 1960-12-14

Family

ID=9852849

Family Applications (1)

Application Number Title Priority Date Filing Date
GB845758A Expired GB855937A (en) 1958-03-17 1958-03-17 Improvements in or relating to circuit arrangements for operating electric lamps

Country Status (1)

Country Link
GB (1) GB855937A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1180456B (en) * 1962-02-01 1964-10-29 Patra Patent Treuhand Ignition and operating device for low-pressure gas discharge lamps with preheatable glow electrodes
EP1061780A2 (en) * 1999-06-11 2000-12-20 Gebr. Berchtold GmbH & Co. Surgery light source with discharge lamps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1180456B (en) * 1962-02-01 1964-10-29 Patra Patent Treuhand Ignition and operating device for low-pressure gas discharge lamps with preheatable glow electrodes
EP1061780A2 (en) * 1999-06-11 2000-12-20 Gebr. Berchtold GmbH & Co. Surgery light source with discharge lamps
EP1061780A3 (en) * 1999-06-11 2004-06-23 Gebr. Berchtold GmbH & Co. Surgery light source with discharge lamps

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