US2267118A - Fluorescent tube - Google Patents

Fluorescent tube Download PDF

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Publication number
US2267118A
US2267118A US321625A US32162540A US2267118A US 2267118 A US2267118 A US 2267118A US 321625 A US321625 A US 321625A US 32162540 A US32162540 A US 32162540A US 2267118 A US2267118 A US 2267118A
Authority
US
United States
Prior art keywords
lamp
envelope
discharge
radiations
mercury
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 - Lifetime
Application number
US321625A
Other languages
English (en)
Inventor
John W Marden
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.)
CBS Corp
Original Assignee
Westinghouse Electric and Manufacturing Co
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
Priority to BE469579D priority Critical patent/BE469579A/xx
Application filed by Westinghouse Electric and Manufacturing Co filed Critical Westinghouse Electric and Manufacturing Co
Priority to US321625A priority patent/US2267118A/en
Priority to GB2739/41A priority patent/GB545592A/en
Application granted granted Critical
Publication of US2267118A publication Critical patent/US2267118A/en
Priority to FR938641D priority patent/FR938641A/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the present invention relates to discharge lamps and particularly to what are known to the art as fluorescent lamps wherein the invisible radiations generated by the discharge excite a fluorescent coating and are converted into visible radiations.
  • fluorescent lamps are designed to operate from supply sources of the customary domestic potential, there is naturally a limit to the current and voltage which can be applledto the lampwithout destroying the lamp or shortening its useful life.
  • Fig. 1 is a front view of a fluorescent lamp made in accordance with the present invention
  • Fig. 2 is a side view of the lamp shown in Fig. 1
  • Fig. 3 is a cross-sectional view taken on the line 111-111 of Fig. 2, and
  • Fig. 4 is a cross-sectional view similar to that of Fig. 3 but having its flattened sidewalls somewhat thickened to provide a lens eil'ect for the cathode dark-spaceto the other.
  • a fluorescent coating I 3 ls provided on theinterior surface of the lamp which is excited by the ultra-violet radiations generated during the discharge with the visible light from the coating being trans-' mitt-ed through the walls of the envelope, the color of the visible light being determined by the composition of the coating material, as is well known in the art.
  • an envelope 5 is shown provided with oppositely disposed electrodes 8 and "l which, as shown, are of um, strontium, or the likepgiving a copious flow of electrons when heated.
  • Leading-in and supporting conductors for the electrodes 6 and I extend througha press portion 8 at each end 01 the cylindrical portion of posed electrode; or. in other words, the flattened portion extends approximately i'rom one the coiled tungsten type and coated with an electronemitting material, such as the oxide of bari-' tic source'of supply of 115 or 230 volts and heating of the electrodes 6 and l, ionization of the starting gas occurs with a resulting discharge between the electrodes The discharge vaporizer.
  • an electronemitting material such as the oxide of bari-' tic source'of supply of 115 or 230 volts and heating of the electrodes 6 and l, ionization of the starting gas occurs with a resulting discharge between the electrodes The discharge vaporizer.
  • the. temperature at the edges necessarily determines the, vapor pressure, which thus allows operation of the lamp at greater average temperature than the optimum value, the latter of which isdependent upon the temperature at the coolest points.
  • the lamp is operable at a higher-voltage per unit length since the cathode drop remains constant, thus permitting the application of an increase in the average watts per unit area 01 envelope surface, all of which results in a higher emciency and a higher output of lumens per foot of lamp length.
  • a further advantage in the oval configuration resides in the fact that it causes themercury vapor to reach equilibrium in a very few minutes
  • the flattened side walls which as a matter of fact naturally have a slightcurvature, may be thickened as shown in Fig. 4 so as to produce a lens effect to thus direct the visible radiations emitted by the lamp.
  • the mercury vapor pressure is controlled to such an extent as to allow greater average temperature of operation together with an increase in-the average watts per unit area of tube surface with an attendant increase in efllciency of the lamp and a greater output of lumens per foot of lamp length.
  • a gaseous electric discharge lamp comprising an envelope, electrodes in said envelope be tween which a discharge occurs upon the application of a suitable potential thereto, an ionizable medium in said envelope for sustaining the discharge between said electrodes and for generating high intensity radiations within the invisible portion of the spectrum, and said envelope being I of oval cross-section adjacent the ensuing discharge with its major axis of greater length than the diameter of the remaining portions to dispose the discharge in close proximity to the flattened side walls' to reduce self-absorption of the generated radiations to a minimum and to provide edges of sharp radii'of curvature having a lower temperature during operation of said lamp to cause an increase in the average temperature immediately adjacent the discharge and an increase in the wattage per, unit area of envelope surface with an attendant increase in the efliciency of said lamp.
  • a gaseous electric discharge lamp compris-' of said envelope between which a discharge oc-' close proximity to the flattened side walls to reduce self-absorption oi the resonant radiations of mercury to a minimum and to provide edges of sharp radii of curvature having a lower temperature during operation of said lamp to en-' able condensation of the mercury vapor at said edges and to prevent an increase in the mercury vapor pressure in the vicinity of the discharge with an attendant decrease in the eiflciency of said lamp.
  • a gaseous electric discharge lamp comprising' an envelope, electrodes disposed at the ends of said envelope between which a discharge occurs upon the'application of a suitable potential thereto, an ionizable 'medium.in said envelope for sustaining the discharge between said electrodes and for generating high intensity radiations within the invisible portion of the spectrum, said envelope being of oval cross-section-adjacent the ensuing discharge with its major axis of greater length than the diameter of the end portions to dispose the latter in close proximity to the flattened side walls to reduce self-absorption .of the generated radiations to a minimum and to provide edges of sharp radii of curvature having a lower temperature during operation of said lamp to cause an increase in the average temperature immediately adjacent the discharge and an increase in the wattage per unit area of envelope surface with anattendant increase in the efficiency of said lamp, and a fluorescent coating on the surface of said envelope for con--' curs upon the application of a suitable potential thereto, an ionizable medium in said envelope including a gas to facilitate starting and

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
US321625A 1940-03-01 1940-03-01 Fluorescent tube Expired - Lifetime US2267118A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE469579D BE469579A (ko) 1940-03-01
US321625A US2267118A (en) 1940-03-01 1940-03-01 Fluorescent tube
GB2739/41A GB545592A (en) 1940-03-01 1941-02-28 Improvements in or relating to gaseous electric discharge lamps
FR938641D FR938641A (fr) 1940-03-01 1946-10-04 Tubes fluorescents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US321625A US2267118A (en) 1940-03-01 1940-03-01 Fluorescent tube

Publications (1)

Publication Number Publication Date
US2267118A true US2267118A (en) 1941-12-23

Family

ID=23251327

Family Applications (1)

Application Number Title Priority Date Filing Date
US321625A Expired - Lifetime US2267118A (en) 1940-03-01 1940-03-01 Fluorescent tube

Country Status (4)

Country Link
US (1) US2267118A (ko)
BE (1) BE469579A (ko)
FR (1) FR938641A (ko)
GB (1) GB545592A (ko)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2535773A (en) * 1943-04-17 1950-12-26 Gen Electric Terminal and seal construction for electric lamps and similar devices
DE1051398B (de) * 1954-12-14 1959-02-26 Gen Electric Niederdruck-Gasentladungslampe mit mindestens einer einspringenden Rinne
US3412276A (en) * 1967-02-02 1968-11-19 Coastal Dynamics Corp Twin filament lamp
US3443144A (en) * 1964-12-31 1969-05-06 Sylvania Electric Prod Infrared incandescent lamp
US3457447A (en) * 1966-07-01 1969-07-22 Sylvania Electric Prod Apertured fluorescent lamp with lens along the aperture
US3617792A (en) * 1969-02-24 1971-11-02 Gen Electric Highly loaded flourescent lamp particularly for dc operation
WO1982000068A1 (en) * 1980-06-20 1982-01-07 J Hanlet Lighting system
US4961024A (en) * 1987-06-26 1990-10-02 Hitachi, Ltd. Circular fluorescent lamp with oval section of tube
US5138223A (en) * 1989-06-17 1992-08-11 Toshiba Lighting & Technology Corporation Tubular fluorescent lamp with intermediate electrode
DE19613468A1 (de) * 1995-04-05 1996-10-10 Wedeco Umwelttechnologie Wasser Boden Luft Gmbh Quecksilber-Niederdruckentladungslampe
DE29701200U1 (de) * 1997-01-24 1997-03-20 Boehm Werner Gasentladungsröhre
WO2002022209A3 (de) * 2000-09-15 2002-06-06 Kratz Josef Gmbh Bräunungsgerät, insbesondere ganzkörper-bräunungsgerät
WO2005117066A1 (ja) * 2004-05-31 2005-12-08 Sanken Electric Co., Ltd. 放電管及びそれを使用する面光源装置
CN1992145B (zh) * 2005-12-30 2012-11-28 乐金显示有限公司 灯、背光单元及采用该背光单元的液晶显示器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1000521B (de) * 1953-04-25 1957-01-10 Flora Mannesmann Geb Nestler Entladungsblitzlichtlampe, insbesondere fuer Mikroskop-Photographie
DE2825018C2 (de) * 1978-06-05 1986-07-24 Georg 4902 Bad Salzuflen Horstmann Quecksilberdampf-Niederdrucklampe
GB2217905A (en) * 1988-04-13 1989-11-01 Ac Dc Holdings Limited Discharge lamps

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2535773A (en) * 1943-04-17 1950-12-26 Gen Electric Terminal and seal construction for electric lamps and similar devices
DE1051398B (de) * 1954-12-14 1959-02-26 Gen Electric Niederdruck-Gasentladungslampe mit mindestens einer einspringenden Rinne
US3443144A (en) * 1964-12-31 1969-05-06 Sylvania Electric Prod Infrared incandescent lamp
US3457447A (en) * 1966-07-01 1969-07-22 Sylvania Electric Prod Apertured fluorescent lamp with lens along the aperture
US3412276A (en) * 1967-02-02 1968-11-19 Coastal Dynamics Corp Twin filament lamp
US3617792A (en) * 1969-02-24 1971-11-02 Gen Electric Highly loaded flourescent lamp particularly for dc operation
US4356428A (en) * 1980-03-05 1982-10-26 Intent Patent, A.G. Lighting system
WO1982000068A1 (en) * 1980-06-20 1982-01-07 J Hanlet Lighting system
US4961024A (en) * 1987-06-26 1990-10-02 Hitachi, Ltd. Circular fluorescent lamp with oval section of tube
US5138223A (en) * 1989-06-17 1992-08-11 Toshiba Lighting & Technology Corporation Tubular fluorescent lamp with intermediate electrode
DE19613468A1 (de) * 1995-04-05 1996-10-10 Wedeco Umwelttechnologie Wasser Boden Luft Gmbh Quecksilber-Niederdruckentladungslampe
DE29701200U1 (de) * 1997-01-24 1997-03-20 Boehm Werner Gasentladungsröhre
WO2002022209A3 (de) * 2000-09-15 2002-06-06 Kratz Josef Gmbh Bräunungsgerät, insbesondere ganzkörper-bräunungsgerät
WO2005117066A1 (ja) * 2004-05-31 2005-12-08 Sanken Electric Co., Ltd. 放電管及びそれを使用する面光源装置
KR100796887B1 (ko) 2004-05-31 2008-01-22 산켄덴키 가부시키가이샤 방전관 및 그것을 사용하는 면광원장치
CN100538992C (zh) * 2004-05-31 2009-09-09 三垦电气株式会社 放电管以及使用放电管的面光源装置
CN1992145B (zh) * 2005-12-30 2012-11-28 乐金显示有限公司 灯、背光单元及采用该背光单元的液晶显示器

Also Published As

Publication number Publication date
FR938641A (fr) 1948-10-20
GB545592A (en) 1942-06-03
BE469579A (ko)

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