GB559318A - Improvements relating to electric discharge lamps - Google Patents

Improvements relating to electric discharge lamps

Info

Publication number
GB559318A
GB559318A GB1374542A GB1374542A GB559318A GB 559318 A GB559318 A GB 559318A GB 1374542 A GB1374542 A GB 1374542A GB 1374542 A GB1374542 A GB 1374542A GB 559318 A GB559318 A GB 559318A
Authority
GB
United Kingdom
Prior art keywords
mms
diameter
electrodes
metal
molybdenum
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
GB1374542A
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.)
Siemens Electric Lamps and Supplies Ltd
Original Assignee
Siemens Electric Lamps and Supplies 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 Siemens Electric Lamps and Supplies Ltd filed Critical Siemens Electric Lamps and Supplies Ltd
Priority to GB1374542A priority Critical patent/GB559318A/en
Publication of GB559318A publication Critical patent/GB559318A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/025—Associated optical elements

Landscapes

  • Discharge Lamp (AREA)

Abstract

559,318. Metal-vapour lamps. SIEMENS ELECTRIC LAMPS & SUPPLIES, Ltd., and ALDINGTON, J. N. Sept. 30, 1942, No. 13745. [Class 39 (i)] In a metal vapour discharge lamp solid electrodes 1 and 20 are mounted with their axes at any angle less than 180 degrees and their extremities are so shaped as not to intercept the angle over which light from the arc is required to be projected. The surfaces of the electrodes are cut away at 10 and 13 in order to effect this latter condition. A shield 17 of molybdenum is provided to intercept rising currents of metal vapour and, when the electrodes are of tungsten particles rising therefrom tend to alloy themselves with the molybdenum at the temperatures prevailing and are thus removed from circulation. In a numerical example the bulb 1 is 110 mms. in diameter, the anode is a cylinder 17.5 mms. in diameter and 35 mms. long, and the cathode is a block 12 mms. diameter and 20 mms. long. The arc gap is 12 mms. and the shield 17 is 4 mms. thick. Specifications 549,373, [Group XXXVI], and 555,545 are referred to.
GB1374542A 1942-09-30 1942-09-30 Improvements relating to electric discharge lamps Expired GB559318A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1374542A GB559318A (en) 1942-09-30 1942-09-30 Improvements relating to electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1374542A GB559318A (en) 1942-09-30 1942-09-30 Improvements relating to electric discharge lamps

Publications (1)

Publication Number Publication Date
GB559318A true GB559318A (en) 1944-02-14

Family

ID=10028607

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1374542A Expired GB559318A (en) 1942-09-30 1942-09-30 Improvements relating to electric discharge lamps

Country Status (1)

Country Link
GB (1) GB559318A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2538561A (en) * 1943-08-09 1951-01-16 Gen Electric High-pressure mercury vapor lamp
US2561866A (en) * 1947-02-20 1951-07-24 Gen Electric High-pressure metal vapor electric discharge lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2538561A (en) * 1943-08-09 1951-01-16 Gen Electric High-pressure mercury vapor lamp
US2561866A (en) * 1947-02-20 1951-07-24 Gen Electric High-pressure metal vapor electric discharge lamp

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