GB448891A - Improvements relating to electric discharge lamps - Google Patents

Improvements relating to electric discharge lamps

Info

Publication number
GB448891A
GB448891A GB211635A GB211635A GB448891A GB 448891 A GB448891 A GB 448891A GB 211635 A GB211635 A GB 211635A GB 211635 A GB211635 A GB 211635A GB 448891 A GB448891 A GB 448891A
Authority
GB
United Kingdom
Prior art keywords
discharge
main
electrode
auxiliary
electrodes
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
GB211635A
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 GB211635A priority Critical patent/GB448891A/en
Publication of GB448891A publication Critical patent/GB448891A/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
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H01J61/541—Igniting arrangements, e.g. promoting ionisation for starting using a bimetal switch
    • H01J61/542—Igniting arrangements, e.g. promoting ionisation for starting using a bimetal switch and an auxiliary electrode inside the vessel

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

448,891. Discharge lamps. SIEMENS ELECTRIC LAMPS & SUPPLIES, Ltd., Caxton House, Tothill Street, Westminster, and ALDINGTON, J. N., c/o Siemens Electric Lamps & Supplies, Ltd., Dock Road, Preston, Lancashire. Jan. 22, 1935, No. 2116. [Class 39 (i)] To start a hotcathode lamp containing gas or vapour, an electrode is heated by a discharge between it and an auxiliary electrode in a low-resistance starting circuit shunting the main discharge path and this circuit is opened, after the main discharge has started, by a thermal switch operated by heat generated in the lamp. The main electrodes 4, 5 are surrounded by auxiliary electrodes 6, 7 which are connected together through wires 11, 13 sealed into a glass bead 12 and through contacts 141 controlled by a bimetallic strip 14. The starting circuit in shunt to the discharge path between the electrodes 4, 5 includes the two auxiliary discharge gaps and the wires 11, 13 and contacts 14<1> and may also include a low resistance which may be in the cap 3. The movement of the strip 14 may be limited by a back-stop. The discharge vessel 1 is shown flexibly supported in the outer container 2 by spiral springs 9. In a modification, one auxiliary electrode only is provided and is connected to the other main electrode by the starting circuit 13.
GB211635A 1935-01-22 1935-01-22 Improvements relating to electric discharge lamps Expired GB448891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB211635A GB448891A (en) 1935-01-22 1935-01-22 Improvements relating to electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB211635A GB448891A (en) 1935-01-22 1935-01-22 Improvements relating to electric discharge lamps

Publications (1)

Publication Number Publication Date
GB448891A true GB448891A (en) 1936-06-17

Family

ID=9733880

Family Applications (1)

Application Number Title Priority Date Filing Date
GB211635A Expired GB448891A (en) 1935-01-22 1935-01-22 Improvements relating to electric discharge lamps

Country Status (1)

Country Link
GB (1) GB448891A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1207006B (en) * 1963-05-25 1965-12-16 Tesla Np Ignition switch for high pressure mercury discharge lamps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1207006B (en) * 1963-05-25 1965-12-16 Tesla Np Ignition switch for high pressure mercury discharge lamps

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