GB955655A - Improvements relating to electric discharge lamps - Google Patents

Improvements relating to electric discharge lamps

Info

Publication number
GB955655A
GB955655A GB1699159A GB1699159A GB955655A GB 955655 A GB955655 A GB 955655A GB 1699159 A GB1699159 A GB 1699159A GB 1699159 A GB1699159 A GB 1699159A GB 955655 A GB955655 A GB 955655A
Authority
GB
United Kingdom
Prior art keywords
tube
heating element
arc
heat shield
container
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
GB1699159A
Inventor
Robert Frederick Weston
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.)
A E I LAMP AND LIGHTING COMPAN
Original Assignee
A E I LAMP AND LIGHTING COMPAN
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 A E I LAMP AND LIGHTING COMPAN filed Critical A E I LAMP AND LIGHTING COMPAN
Priority to GB1699159A priority Critical patent/GB955655A/en
Priority to FR827477A priority patent/FR1257402A/en
Priority to CH571060A priority patent/CH382850A/en
Priority to DE1960A0015103 priority patent/DE1846694U/en
Publication of GB955655A publication Critical patent/GB955655A/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
    • H01J61/30—Vessels; Containers
    • H01J61/33—Special shape of cross-section, e.g. for producing cool spot
    • 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
    • H01J61/045—Thermic screens or reflectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/74—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of difficult vaporisable metal vapour, e.g. sodium

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

955,655. Discharge lamps. A. E. I. LAMP & LIGHTING CO. Ltd. May 6, 1960 [May 19, 1959], No. 16991/59. Addition to 923,961. Heading H1D. A low pressure sodium vapour-rare gas discharge lamp having an arc tube 1 enclosed in an evacuated container 13 in the form of a singlewalled tube or double walled flask, and a heat shield 8 in the form of a glass tube between the tube 1 and container 13, the tube 1 being mainly of non-circular section and shaped to provide longitudinally extending recesses for retention of molten metal, located, in successive longitudinal regions of the tube, to lie on opposite sides of the arc axis as in the parent Specification, has an electrical heating element 11 wound on the heat shield 8 and terminals 5 through which current of adjustable value is supplied to the electrodes 2. A longitudinal strap of mica 14 is located between the turns of the heating element 11 and the heat shield 8 to tension the heating element on expansion. The arc tube 1 is supported within the container 13 by collars 9, each end of the tube 1 terminating in a pinch 4 supported from the ceramic collar 9 by a tubular extension 6 and ceramic end plate 10. Current is supplied to the heating element 11 through screws 12 on the collars 9. The number of turns per unit axial length of the heating element 11 in the neighbourhood of each extension 6 is greater than that in the neighbourhood of the arc path. The pressure of the sodium vapour in operation is about 0.9 microns corresponding to a metal temperature of about 230‹ C. A tubulation 7 is provided which extends into the tube 1 for evacuation and filling with rare gas and sodium metal.
GB1699159A 1959-05-19 1959-05-19 Improvements relating to electric discharge lamps Expired GB955655A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB1699159A GB955655A (en) 1959-05-19 1959-05-19 Improvements relating to electric discharge lamps
FR827477A FR1257402A (en) 1959-05-19 1960-05-17 Improvements to electric discharge lamps
CH571060A CH382850A (en) 1959-05-19 1960-05-18 Sodium vapor lamp
DE1960A0015103 DE1846694U (en) 1959-05-19 1960-05-19 SODIUM VAPOR LAMP.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1699159A GB955655A (en) 1959-05-19 1959-05-19 Improvements relating to electric discharge lamps

Publications (1)

Publication Number Publication Date
GB955655A true GB955655A (en) 1964-04-15

Family

ID=10087259

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1699159A Expired GB955655A (en) 1959-05-19 1959-05-19 Improvements relating to electric discharge lamps

Country Status (3)

Country Link
CH (1) CH382850A (en)
DE (1) DE1846694U (en)
GB (1) GB955655A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0066860A2 (en) * 1981-06-04 1982-12-15 General Electric Company A temperature-controlled, metal-vapor discharge lamp
FR2861893A1 (en) * 2003-08-20 2005-05-06 Hewlett Packard Development Co THERMALLY OPTIMIZED COLD CATHODE HEATING DEVICE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0066860A2 (en) * 1981-06-04 1982-12-15 General Electric Company A temperature-controlled, metal-vapor discharge lamp
EP0066860A3 (en) * 1981-06-04 1983-01-26 General Electric Company A temperature-controlled, metal-vapor discharge lamp
FR2861893A1 (en) * 2003-08-20 2005-05-06 Hewlett Packard Development Co THERMALLY OPTIMIZED COLD CATHODE HEATING DEVICE

Also Published As

Publication number Publication date
DE1846694U (en) 1962-02-15
CH382850A (en) 1964-10-15

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