GB435025A - Improvements in circuits for discharge lamps - Google Patents

Improvements in circuits for discharge lamps

Info

Publication number
GB435025A
GB435025A GB2085633A GB2085633A GB435025A GB 435025 A GB435025 A GB 435025A GB 2085633 A GB2085633 A GB 2085633A GB 2085633 A GB2085633 A GB 2085633A GB 435025 A GB435025 A GB 435025A
Authority
GB
United Kingdom
Prior art keywords
current
lamp
electrodes
barium
nickel
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
GB2085633A
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
Priority to GB2085633A priority Critical patent/GB435025A/en
Publication of GB435025A publication Critical patent/GB435025A/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
    • H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency

Landscapes

  • Discharge Lamp (AREA)

Abstract

435,025. Discharge lamps. FREEDMAN, P., 6, Hillside Gardens, Highgate, London. Aug. 18, 1934, No. 20856/33. [Class 39 (i)] A metallic vapour or gaseous discharge lamp 4 with cold internal electrodes 5 and a luminous column much greater in length than in cross section is operated simultaneously on highfrequency current 8 and ordinary household direct-current or alternating low-frequency current supply 6. The current from either source may be modulated. According to modifications the lamp has three, Fig. 2 (not shown), or four electrodes, Fig. 3, (not shown). The electrodes are cylindrical and of iron, preferably oxidized, nickel, cobalt, or an alloy of those metals with barium, calcium or strontium, or a block of calcium or magnesium in a gauze of iron, nickel, or copper, or a metal coated with barium or strontium oxides. The lamp is filled with neon, helium, or argon, or a mixture with small additions of hydrogen, or hydrocarbon vapour. Mercury, cadmium, or sodium, or thallium chloride or titanium chloride may be introduced. Specification 417,855 is referred to.
GB2085633A 1934-08-18 1934-08-18 Improvements in circuits for discharge lamps Expired GB435025A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2085633A GB435025A (en) 1934-08-18 1934-08-18 Improvements in circuits for discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2085633A GB435025A (en) 1934-08-18 1934-08-18 Improvements in circuits for discharge lamps

Publications (1)

Publication Number Publication Date
GB435025A true GB435025A (en) 1935-09-13

Family

ID=10152891

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2085633A Expired GB435025A (en) 1934-08-18 1934-08-18 Improvements in circuits for discharge lamps

Country Status (1)

Country Link
GB (1) GB435025A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441749A (en) * 1944-08-07 1948-05-18 Carl M Brainard Electrically energized visible unit
US2447304A (en) * 1946-03-20 1948-08-17 Sun Kraft Inc Circuit for miniature lamps
DE968428C (en) * 1952-02-28 1958-02-13 Zeiss Jena Veb Carl Circuit arrangement for gas discharge lamps serving as a light source for cinema projectors
DE1037008B (en) * 1954-02-20 1958-08-21 Deutsche Elektronik Gmbh Method for facilitating ignition in gas discharge lamps, in particular in flashlight discharge lamps

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441749A (en) * 1944-08-07 1948-05-18 Carl M Brainard Electrically energized visible unit
US2447304A (en) * 1946-03-20 1948-08-17 Sun Kraft Inc Circuit for miniature lamps
DE968428C (en) * 1952-02-28 1958-02-13 Zeiss Jena Veb Carl Circuit arrangement for gas discharge lamps serving as a light source for cinema projectors
DE1037008B (en) * 1954-02-20 1958-08-21 Deutsche Elektronik Gmbh Method for facilitating ignition in gas discharge lamps, in particular in flashlight discharge lamps

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