FR2251912A1 - Sodium vapour high-pressure discharge lamp - having internal auxiliary electrode for short ignition discharge path - Google Patents

Sodium vapour high-pressure discharge lamp - having internal auxiliary electrode for short ignition discharge path

Info

Publication number
FR2251912A1
FR2251912A1 FR7341377A FR7341377A FR2251912A1 FR 2251912 A1 FR2251912 A1 FR 2251912A1 FR 7341377 A FR7341377 A FR 7341377A FR 7341377 A FR7341377 A FR 7341377A FR 2251912 A1 FR2251912 A1 FR 2251912A1
Authority
FR
France
Prior art keywords
auxiliary electrode
discharge path
sodium vapour
discharge lamp
vapour high
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.)
Granted
Application number
FR7341377A
Other languages
French (fr)
Other versions
FR2251912B1 (en
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.)
CENTRAL ECLAIRAGE LAB
Original Assignee
CENTRAL ECLAIRAGE LAB
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 CENTRAL ECLAIRAGE LAB filed Critical CENTRAL ECLAIRAGE LAB
Priority to FR7341377A priority Critical patent/FR2251912A1/en
Priority to DE19742424294 priority patent/DE2424294A1/en
Priority to GB2339674A priority patent/GB1477487A/en
Priority to IT2917874A priority patent/IT1025483B/en
Publication of FR2251912A1 publication Critical patent/FR2251912A1/en
Application granted granted Critical
Publication of FR2251912B1 publication Critical patent/FR2251912B1/fr
Granted 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
    • H01J61/545—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode inside the vessel

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

A sodium vapour high-pressure discharge lamp is fitted with two main discharge electrode which face each other so that the gap represents the effective discharge path during operation. An auxiliary electrode defines another shorter discharge path which is used for ignition. It is fused like the main electrodes into a sheath of not readily fusible material, pref. polycrystalline aluminium oxide. This lamp requires no external ignition device and causes no interference with wireless and TV reception.
FR7341377A 1973-05-25 1973-11-21 Sodium vapour high-pressure discharge lamp - having internal auxiliary electrode for short ignition discharge path Granted FR2251912A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR7341377A FR2251912A1 (en) 1973-11-21 1973-11-21 Sodium vapour high-pressure discharge lamp - having internal auxiliary electrode for short ignition discharge path
DE19742424294 DE2424294A1 (en) 1973-05-25 1974-05-18 SODIUM VAPOR HIGH PRESSURE DISCHARGE LAMP AND METHOD OF MANUFACTURING
GB2339674A GB1477487A (en) 1973-05-25 1974-05-24 High pressure sodium-vapour discharge lamp
IT2917874A IT1025483B (en) 1973-11-21 1974-11-07 HIGH PRESSURE SODIUM VAPOR DISCHARGE LAMP

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7341377A FR2251912A1 (en) 1973-11-21 1973-11-21 Sodium vapour high-pressure discharge lamp - having internal auxiliary electrode for short ignition discharge path

Publications (2)

Publication Number Publication Date
FR2251912A1 true FR2251912A1 (en) 1975-06-13
FR2251912B1 FR2251912B1 (en) 1978-09-08

Family

ID=9128026

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7341377A Granted FR2251912A1 (en) 1973-05-25 1973-11-21 Sodium vapour high-pressure discharge lamp - having internal auxiliary electrode for short ignition discharge path

Country Status (2)

Country Link
FR (1) FR2251912A1 (en)
IT (1) IT1025483B (en)

Also Published As

Publication number Publication date
IT1025483B (en) 1978-08-10
FR2251912B1 (en) 1978-09-08

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse