US2223470A - Gaseous electric discharge lamp device - Google Patents

Gaseous electric discharge lamp device Download PDF

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Publication number
US2223470A
US2223470A US174860A US17486037A US2223470A US 2223470 A US2223470 A US 2223470A US 174860 A US174860 A US 174860A US 17486037 A US17486037 A US 17486037A US 2223470 A US2223470 A US 2223470A
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US
United States
Prior art keywords
lamp device
rays
lamp
electric discharge
gaseous electric
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
US174860A
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English (en)
Inventor
Pieter M Van Alphen
Eduard G Dorgelo
Hendricus J Lemmens
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
Original Assignee
General Electric 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
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US2223470A publication Critical patent/US2223470A/en
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
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/822—High-pressure mercury lamps

Definitions

  • the lamp devices 2 and 3 have thereinbetween a glass plate l8 having a thickness of about 1.5
  • the glass plates is and I9 consist of a glass having the following composition:
  • This glass composition is a yellow glass which cuts oil the ultra-violet rays and the short wave-length visible rays, such as the violet and blue rays emitted by the discharge lamp devices. At a thickness of 1.5 mm. the glass absorbs about of the rays having a wave-length of 4100 5., about 74% of the rays having a wave-length of 4200 A., and about 57% of the rays having a wavelength of about 4400 A.
  • the embodiment shown in Figs. 3 and 4 of the drawings comprises a high pressure lamp device 20 of the type which is not liquid cooled and which comprises a tubular container of vitreous material, such as quartz, having an internal diameter of about 5 mm. and an external diameter of about 7.5 mm.
  • a pair of activated, thermionic electrodes is mounted in said container, one at each end thereof, and said container has a quantity of mercury therein in such amount that it is completely vaporized when the lamp is at operating equilibrium. ⁇ Vhen desired, a larger quantity of mercury is used.
  • a starting gas, such as argon, is present in said container 29.
  • the lamp device illustrated in Figs. 3 and 4 is operated at lower currents than the lamp device illustrated in Figs.
  • the lamp device 2% is mounted in an evacuated bulb 2
  • the bulb 2! is provided with an inert gaseous filling, such as nitrogen.
  • a reflector is mounted in said bulb 2
  • Said reflector consists of an arched glass plate 25 having a reflecting metal coating 25 on the surface there of remote from the lamp device 20.
  • the glass plate 26 is cylindrical in shape so that the reflecting metal coating 25 thereon is in the form of a cylinder, the axis of which coincides with the longitudinal axis of the lamp device 20'.
  • the glass plate 26 consists of a glass
  • the lamp devices described above are highly efficient ones having a long'useful operating life.
  • a lamp unit comprising in combination a gaseous electric discharge device of the high vapor pressure type capable of emitting visible and ultra violet rays, another source of similar rays associated with said lamp device in such manner that the rays from said source are incident on said lamp device and a filter interposed between said lamp device and said source for absorbing ultraviolet rays to lengthen the useful operating life of said lamp device.
  • a lamp unit comprising in combination agaseous electric discharge device of the high vapor pressure type capable of emitting visible and ultra violet rays, another source ofsimilar rays associated with said lamp device in such manner that the rays from said source are incident on said lamp device and a filter interposed between said lamp device and said source for absorbing rays of a wave-length shorter than 4500 A. to increase the useful life of said lamp device.
  • a lamp unit comprising in combination a gaseous electric discharge device of the high vapor pressure type capable of emitting visible and ultra violet rays, another source of similar rays associated with said lamp device in such manner that the rays from said source are incident on said lamp device and a filter of colored glass interposed between said lamp device and said source for absorbing blue, violet and ultraviolet rays to lengthenthe useful operating life of said lamp device.
  • a lamp unit comprising in combination a gaseous electric discharge device of the high vapor pressure type capable of emitting visible and ultra violet rays, a reflector associated with said lamp device and a filter interposed between-said lamp device and said reflector for absorbing the rays of shorter wave-length emitted by said lamp device to lengthen the useful operating life of said lamp device.
  • a lamp unit comprising in combination a gaseous electric discharge device of the high vapor pressure type capable of emitting visible and ultra violet rays, another gaseous electric discharge device of the same type capable of emitting similar rays, said devices being mounted in such position relative to each other that the rays from each device are incident on the other of said devices and a filter interposed between said devices for absorbing ultraviolet rays emitted by each of said devices in the direction of the other of said devices to lengthen the useful operating life of said devices.
  • a lamp unit comprising in combination, a' gaseous electric discharge device of the high vapor pressure type capable of emitting visible and ultraviolet rays, a radiation projecting means mounted in light receiving relation to said discharge device, said means being capable of projecting visible and ultraviolet rays toward said discharge device and a filter interposed between said device and said projecting means for absorbing ultraviolet rays to lengthen the useful operating life of said device.

Landscapes

  • Glass Compositions (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US174860A 1936-11-27 1937-11-16 Gaseous electric discharge lamp device Expired - Lifetime US2223470A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE488352X 1936-11-27

Publications (1)

Publication Number Publication Date
US2223470A true US2223470A (en) 1940-12-03

Family

ID=6543785

Family Applications (1)

Application Number Title Priority Date Filing Date
US174860A Expired - Lifetime US2223470A (en) 1936-11-27 1937-11-16 Gaseous electric discharge lamp device

Country Status (5)

Country Link
US (1) US2223470A (en:Method)
BE (1) BE424837A (en:Method)
FR (1) FR829923A (en:Method)
GB (1) GB488352A (en:Method)
NL (1) NL50120C (en:Method)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595520A (en) * 1947-03-26 1952-05-06 John J Guerin Enclosed fluorescent lighting device
DE1002725B (de) * 1954-06-26 1957-02-21 Wirth Arno H Fa Vorrichtung zur elektrostatischen Beflockung entgegen der Schwerkraft
US3219810A (en) * 1961-08-10 1965-11-23 Inland Steel Products Company Light transmitting and heat transferring apparatus
US4101424A (en) * 1975-05-22 1978-07-18 Sun Chemical Corporation Water jacket for ultraviolet lamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595520A (en) * 1947-03-26 1952-05-06 John J Guerin Enclosed fluorescent lighting device
DE1002725B (de) * 1954-06-26 1957-02-21 Wirth Arno H Fa Vorrichtung zur elektrostatischen Beflockung entgegen der Schwerkraft
US3219810A (en) * 1961-08-10 1965-11-23 Inland Steel Products Company Light transmitting and heat transferring apparatus
US4101424A (en) * 1975-05-22 1978-07-18 Sun Chemical Corporation Water jacket for ultraviolet lamp

Also Published As

Publication number Publication date
FR829923A (fr) 1938-07-11
GB488352A (en) 1938-07-05
BE424837A (en:Method)
NL50120C (en:Method)

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