GB590703A - Improvements in and relating to electric discharge lamps - Google Patents

Improvements in and relating to electric discharge lamps

Info

Publication number
GB590703A
GB590703A GB25632/44A GB2563244A GB590703A GB 590703 A GB590703 A GB 590703A GB 25632/44 A GB25632/44 A GB 25632/44A GB 2563244 A GB2563244 A GB 2563244A GB 590703 A GB590703 A GB 590703A
Authority
GB
United Kingdom
Prior art keywords
glass
sealed
groove
helical
ridges
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
GB25632/44A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to ES173962A priority Critical patent/ES173962A1/en
Priority to GB25632/44A priority patent/GB590703A/en
Priority to FR922051D priority patent/FR922051A/en
Priority to US650066A priority patent/US2501375A/en
Priority to BE463973D priority patent/BE463973A/fr
Publication of GB590703A publication Critical patent/GB590703A/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
    • H01J61/96—Lamps with light-emitting discharge path and separately-heated incandescent body within a common envelope, e.g. for simulating daylight
    • 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
    • H01J61/10—Shields, screens, or guides for influencing the discharge
    • H01J61/103—Shields, screens or guides arranged to extend the discharge path
    • 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
    • H01J61/32—Special longitudinal shape, e.g. for advertising purposes
    • H01J61/327—"Compact"-lamps, i.e. lamps having a folded discharge path

Landscapes

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

Abstract

590,703. Discharge lamps. GENERAL ELECTRIC CO., Ltd., BREADNER, R. L., JENKINS, H. G., and SIMMS, C. H. Dec. 21, 1944, No. 25632. [Claas 39 (i)] An electric discharge lamp having the dis-' charge passage of spiral shape comprises an inner blown glass member 10 shown in Fig. 1 moulded to form a helical groove 12 with ridges 11, placed inside a second blown glass member which is sealed to the first along the ridges 11, as shown in Fig. 3, forming a helical discharge path of approximately semicircular cross-section. Tubulations 13 and 14 are sealed to the inner member at the ends of the groove, for example by the method according to Specification 534,952, [Group XXXVI], and electrodes 16 and 17 are sealed through pinches formed in their lower ends. The envelope is coated internally with luminescent powder, e.g. as described in Specifications 421,932 and 460,756 and may have gas or vapour filling. Materials mentioned are zinc beryllium silicate, magnesium tungsten, zinc silicate, calcium tungstate, or fillings, argon, neon or mercury vapour. In an alternative construction, the outer member is provided with a spiral groove, whereas the inner is plain as in Fig. 4 (not shown). Sealing may be effected by collapsing the outer component on to the ridge 11 or by local progressive melting with a small flame. The inner surface of the inner tube may be metallized with a film of high reflectivity, e.g. by chemical deposition of silver or a highly reflecting surface may be arranged in the space within the inner component. This space may be used to accommodate starting switches, radio interference suppressors &c. or an additional light source to modify the colour of the light. The lamp may have a plurality of separate helical discharge paths or the paths may be in the form of two-start spirals each being given a different filling. The minimum radius of curvature at the troughs of the grooves is given as 5 times the maximum thickness of the glass and the minimum at any point is equal to the maximum thickness of the glass. The glass members may be in the form of openended cylinders to allow cooling by convection currents.
GB25632/44A 1944-12-21 1944-12-21 Improvements in and relating to electric discharge lamps Expired GB590703A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES173962A ES173962A1 (en) 1944-12-21 1944-12-21 AN ELECTRIC SHOCK LAMP
GB25632/44A GB590703A (en) 1944-12-21 1944-12-21 Improvements in and relating to electric discharge lamps
FR922051D FR922051A (en) 1944-12-21 1946-02-13 Electric discharge lamps
US650066A US2501375A (en) 1944-12-21 1946-02-25 Electric discharge lamp
BE463973D BE463973A (en) 1944-12-21 1946-03-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25632/44A GB590703A (en) 1944-12-21 1944-12-21 Improvements in and relating to electric discharge lamps

Publications (1)

Publication Number Publication Date
GB590703A true GB590703A (en) 1947-07-25

Family

ID=10230805

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25632/44A Expired GB590703A (en) 1944-12-21 1944-12-21 Improvements in and relating to electric discharge lamps

Country Status (5)

Country Link
US (1) US2501375A (en)
BE (1) BE463973A (en)
ES (1) ES173962A1 (en)
FR (1) FR922051A (en)
GB (1) GB590703A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE898622C (en) * 1949-12-06 1953-12-03 Ulrich W Doering Electric discharge tubes filled with gases and / or vapors of low pressure
DE968549C (en) * 1952-09-15 1958-03-06 Ing Karl Nowak Gas discharge lamp with a built-in bulb that extends almost over the length of the lamp
WO1998031042A1 (en) * 1997-01-10 1998-07-16 Light Years Ahead Ipr Limited Discharge lamp

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE906245C (en) * 1950-06-22 1954-03-11 Paul Jahn Dipl Ing Luminescent lamp
DE838796C (en) * 1950-07-16 1952-05-12 Siemens Ag Gas discharge lamp
DE1017286B (en) * 1952-06-17 1957-10-10 Ing Karl Nowak Gas discharge lamp
NL238268A (en) * 1958-04-18
US3903447A (en) * 1971-10-22 1975-09-02 Westinghouse Electric Corp Single-ended electric discharge lamp having tubular envelope with partition means that provides a helical arc path
US3899712A (en) * 1974-05-01 1975-08-12 Gen Electric Tapered helical compact fluorescent lamp
JPS52113584A (en) * 1976-03-19 1977-09-22 Matsushita Electronics Corp Lamp and its production method
US4187446A (en) * 1977-09-21 1980-02-05 Leo Gross Screw-in fluorescent lamp with magnetic arc spreading
US4311942A (en) * 1977-09-21 1982-01-19 Spellman High Voltage Electronics Corp. Compact fluorescent lamp and method and means for magnetic arc spreading
NL7812539A (en) * 1978-02-14 1979-08-16 Philips Nv LOW-PRESSURE MERCURY DISCHARGE LAMP.
NL7906203A (en) * 1979-08-15 1981-02-17 Philips Nv LOW-PRESSURE MERCURY DISCHARGE LAMP.
DE69630068T2 (en) * 1995-03-31 2004-06-17 General Electric Co. Fluorescent Lamp
US6404123B1 (en) * 1998-08-21 2002-06-11 Corning Incorporated Channeled glass article for compact fluorescent lighting
US20050088076A1 (en) * 2003-10-27 2005-04-28 Chi-Jung Chu Fluorescent lamp
EP1714303A2 (en) * 2004-02-10 2006-10-25 TBT Asset Management International Limited Gas discharge fluorescent device with lamp support
ATE531073T1 (en) * 2005-07-20 2011-11-15 Tbt Asset Man Internat Ltd LIGHTING UNIT WITH SERPENTINE COLD CATHODE FLUORESCENCE LAMP
US7973489B2 (en) 2007-11-02 2011-07-05 Tbt Asset Management International Limited Lighting system for illumination using cold cathode fluorescent lamps
US8492991B2 (en) 2007-11-02 2013-07-23 Tbt Asset Management International Limited Lighting fixture system for illumination using cold cathode fluorescent lamps

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1984215A (en) * 1931-01-16 1934-12-11 Hotchner Fred Vacuum vessel and illuminating device
US1870147A (en) * 1931-04-02 1932-08-02 Emanuel C Smally Illuminating device
BE433935A (en) * 1938-05-19
US2205672A (en) * 1938-10-13 1940-06-25 David F Sawyer Lighting element and fixture therefor
US2316348A (en) * 1940-10-19 1943-04-13 Mahlck Gustave Lamp
US2279635A (en) * 1941-01-07 1942-04-14 Fred J Mckane Luminous vapor lamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE898622C (en) * 1949-12-06 1953-12-03 Ulrich W Doering Electric discharge tubes filled with gases and / or vapors of low pressure
DE968549C (en) * 1952-09-15 1958-03-06 Ing Karl Nowak Gas discharge lamp with a built-in bulb that extends almost over the length of the lamp
WO1998031042A1 (en) * 1997-01-10 1998-07-16 Light Years Ahead Ipr Limited Discharge lamp

Also Published As

Publication number Publication date
US2501375A (en) 1950-03-21
FR922051A (en) 1947-05-28
BE463973A (en) 1946-04-30
ES173962A1 (en) 1946-07-16

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