GB538855A - Improvements in or relating to high-pressure metal vapour electric discharge tubes - Google Patents

Improvements in or relating to high-pressure metal vapour electric discharge tubes

Info

Publication number
GB538855A
GB538855A GB5731/40A GB573140A GB538855A GB 538855 A GB538855 A GB 538855A GB 5731/40 A GB5731/40 A GB 5731/40A GB 573140 A GB573140 A GB 573140A GB 538855 A GB538855 A GB 538855A
Authority
GB
United Kingdom
Prior art keywords
chamber
discharge
envelope
lamp
plate
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
GB5731/40A
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.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Philips Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB538855A publication Critical patent/GB538855A/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
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • H01J61/523—Heating or cooling particular parts of the lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/28—Means for producing, introducing, or replenishing gas or vapour during operation of the lamp

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

538,855. Discharge lamps. PHILIPS LAMPS, Ltd. March 29; 1940, No. 5731. Convention date, April 1, 1939. [Class 39 (i)] In a high pressure mercury vapour lamp which runs normally with the mercury vapour unsaturated the time of re-starting of the lamp after it has been extinguished is lessened by providing an auxiliary chamber 4 which is surrounded by a. heater coil 8 in series with the discharge; a molybdenum plate 6 inside this chamber is connected to a.radiating plate 7 by a wire 5 the plate 6 and the chamber being blackened to accelerate cooling. If the lamp is extinguished the chamber 4 cools rapidly to lower the vapour pressure within the envelope; this reduces the potential required to produce as glow discharge and restarting, the heavy starting current through the coil 8 heating up the chamber and maintaining the necessary high vapour pressure. A radiating plate may be inside the chamber. The envelope is enclosed in an outer container 13 with a filling of nitrogen. Argon at 2 c.m. is used with the, mercury in the envelope. Discharge current values are given.
GB5731/40A 1939-04-01 1940-03-29 Improvements in or relating to high-pressure metal vapour electric discharge tubes Expired GB538855A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL538855X 1939-04-01

Publications (1)

Publication Number Publication Date
GB538855A true GB538855A (en) 1941-08-19

Family

ID=19787240

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5731/40A Expired GB538855A (en) 1939-04-01 1940-03-29 Improvements in or relating to high-pressure metal vapour electric discharge tubes

Country Status (6)

Country Link
US (1) US2267821A (en)
BE (1) BE438506A (en)
DE (1) DE730066C (en)
FR (1) FR865414A (en)
GB (1) GB538855A (en)
NL (1) NL52397C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942062A (en) * 1974-10-15 1976-03-02 Rca Corporation Metal vapor laser discharge device
HU191673B (en) * 1984-06-12 1987-03-30 Tungsram Reszvenytarsasag High-pressure sodium lamp with improved colour response
US4591721A (en) * 1984-10-10 1986-05-27 Andors Analyzers Incorporated Oxygen analysis employing absorption spectroscopy
US4798997A (en) * 1985-12-26 1989-01-17 Canon Kabushiki Kaisha Lighting device
US4797598A (en) * 1986-06-19 1989-01-10 Canon Kabushiki Kaisha Illumination apparatus

Also Published As

Publication number Publication date
FR865414A (en) 1941-05-23
BE438506A (en)
DE730066C (en) 1943-01-06
NL52397C (en)
US2267821A (en) 1941-12-30

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