GB434077A - Improvements in electric circuit arrangements for electric discharge devices - Google Patents

Improvements in electric circuit arrangements for electric discharge devices

Info

Publication number
GB434077A
GB434077A GB3966/35A GB396635A GB434077A GB 434077 A GB434077 A GB 434077A GB 3966/35 A GB3966/35 A GB 3966/35A GB 396635 A GB396635 A GB 396635A GB 434077 A GB434077 A GB 434077A
Authority
GB
United Kingdom
Prior art keywords
resistances
discharge
feb
electric
cathode
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
GB3966/35A
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
Publication of GB434077A publication Critical patent/GB434077A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02Details
    • H05B41/04Starting switches
    • H05B41/10Starting switches magnetic only

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

434,077. Discharge apparatus. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Assignees of Patent- Treuhand-Ges. fur Elektrische Gl³hlampen; 11, Ehrenbergstrasse, Berlin) Feb. 7, 1935, No. 3966. Convention date, Feb. 7, 1934. [Class 39 (i)] [See also Groups XI and XXXVI] A discharge device such as a lamp 1, Fig. 1, has at least one independently heated thermionic cathode 3, the heating element 4 being supplied through two resistances 9, 10 in parallel, one of the resistances 9 being disconnected when the discharge has started so as to reduce the heating current. The cathode may be indirectly-heated, filamentary or of mixed type. The switching is preferably performed by the discharge current, as by the relay 12. The resistances 9, 10 are preferably tungsten helices enclosed in a sealed vessel 17, Fig. 2, which is exhausted or filled with neutral gas. The switch 11, 12 may be within the vessel 17, as shown, or in a contact-carrying cap, Fig. 3 (not shown). The resistances 9, 10 may become incandescent when they act as an additional source of light. Specification 402,937 is referred to.
GB3966/35A 1934-02-07 1935-02-07 Improvements in electric circuit arrangements for electric discharge devices Expired GB434077A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE434077X 1934-02-07

Publications (1)

Publication Number Publication Date
GB434077A true GB434077A (en) 1935-08-26

Family

ID=6503796

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3966/35A Expired GB434077A (en) 1934-02-07 1935-02-07 Improvements in electric circuit arrangements for electric discharge devices

Country Status (1)

Country Link
GB (1) GB434077A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429162A (en) * 1943-01-18 1947-10-14 Boucher And Keiser Company Starting and operating of fluorescent lamps
US2539547A (en) * 1945-06-13 1951-01-30 Clare & Co C P Relay

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429162A (en) * 1943-01-18 1947-10-14 Boucher And Keiser Company Starting and operating of fluorescent lamps
US2539547A (en) * 1945-06-13 1951-01-30 Clare & Co C P Relay

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