GB445141A - Improvements in electric discharge devices - Google Patents

Improvements in electric discharge devices

Info

Publication number
GB445141A
GB445141A GB886035A GB886035A GB445141A GB 445141 A GB445141 A GB 445141A GB 886035 A GB886035 A GB 886035A GB 886035 A GB886035 A GB 886035A GB 445141 A GB445141 A GB 445141A
Authority
GB
United Kingdom
Prior art keywords
portions
discharge
electrode
heated
heater
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
GB886035A
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority to GB886035A priority Critical patent/GB445141A/en
Priority to US68306A priority patent/US2094668A/en
Publication of GB445141A publication Critical patent/GB445141A/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
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode

Landscapes

  • Discharge Lamp (AREA)

Abstract

445,141. Discharge lamps. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London..-(Patent-Treuhand-Ges. f³r Electrische Gl³hlampen; 11, Ehrenbergstrasse, Berlin) March 21, 1935, No. 8860. [Class 39 (i)] In a high-pressure, metal-vapour discharge lamp having at least one thermionic electrode, which is independently heated at starting but is during normal working-at least in main part-heated by the discharge, this electrode being composed of a number of portions 4, 5-directly or indirectly heated-with their heater elements in parallel as described in Specification 432,950, the elements are arranged one behind the other along the direction of the discharge. The filling may be a rare gas with sodium. The portions of one electrode are given different constitutions so that one part is at first more effective than the other; one may be smaller than the other, or a resistance 6 may be included in a heater circuit, or different emitting surfaces may be used so that the cathode falls are unequal. The portions 4, 5 consist of rods of alkaline earth surrounded by tungsten spirals. The envelope is enclosed in an outer thermally insulated tube. According to the Provisional Specification the heater circuits are disconnected after starting.
GB886035A 1935-03-13 1935-03-21 Improvements in electric discharge devices Expired GB445141A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB886035A GB445141A (en) 1935-03-21 1935-03-21 Improvements in electric discharge devices
US68306A US2094668A (en) 1935-03-13 1936-03-11 Electric metal vapor lighting tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB886035A GB445141A (en) 1935-03-21 1935-03-21 Improvements in electric discharge devices

Publications (1)

Publication Number Publication Date
GB445141A true GB445141A (en) 1936-04-03

Family

ID=9860645

Family Applications (1)

Application Number Title Priority Date Filing Date
GB886035A Expired GB445141A (en) 1935-03-13 1935-03-21 Improvements in electric discharge devices

Country Status (1)

Country Link
GB (1) GB445141A (en)

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