US3683227A - Low-pressure mercury-vapor gas-discharge fluorescent lamp with amalgam - Google Patents

Low-pressure mercury-vapor gas-discharge fluorescent lamp with amalgam Download PDF

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Publication number
US3683227A
US3683227A US132392A US3683227DA US3683227A US 3683227 A US3683227 A US 3683227A US 132392 A US132392 A US 132392A US 3683227D A US3683227D A US 3683227DA US 3683227 A US3683227 A US 3683227A
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US
United States
Prior art keywords
mercury
amalgam
low
fluorescent lamp
per cent
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Expired - Lifetime
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US132392A
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English (en)
Inventor
Jury Iosifovich Shindelman
Galina Iosifovna Akulova
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    • 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

Definitions

  • the present invention relates to electric gasdischarge lamps, and more specifically to low-pressure mercury-vapor gas-discharge fluorescent lamps with an amalgam.
  • This disadvantage is mainly traceable to the low partial pressure of the mercury vapor over the amalgam at temperatures below 30 C., because of which the resonance radiation responsible for the excitation of the phosphor is low in intensity.
  • Another object of the invention is to provide a solid amalgam composition ensuring optimum performance for low pressure mercury-vapor gas-discharge fluorescent lamps at ambient temperatures below 30 C. by the proper choice of the amalgam formulation, this amalgam being suitable for lamps of any power rating and independent of the manner in which it may be disposed in a lamp.
  • the present invention resides in that, in a mercury-vapor gas-discharge fluorescent lamp, use is made of an amalgam of the formulation: mercury, at. per cent; lead, 45 75 at. per cent; bismuth, 4O 05 at. per cent, ensuring an optimum lumnious flux in the temperature range from 10 to 35 C.
  • Placement of the amalgam in a lamp is not critical
  • curves A, B, and C are seen to have all a single peak in the temperature range from 30 to 35 C.
  • the most attractive formulation appears to be the one containing 20 at. per cent mercury, 5 at. per cent bismuth, and 75 at per cent lead, because its luminous flux decreases gradually on moving into the region of higher temperatures.
  • the yield of mercury vapor from the amalgam is mainly decided by its content of lead which acts as a kind of stabilizer of an optimum pressure of mercury vapor (3 X 10* mm Hg) in the lamp. Partly, the maintenance of this optimum pressure of mercury vapor is due to the formation of intermetallic mercury-bismuth compounds. In contrast to the classical chemical bonds ion and covalent, these compounds feature a specific metallic bond which invalidates the valence theory.
  • the amalgam is prepared from inexpensive and abundant materials and compares favorably with any of prior-art amalgams for gas-discharge lamps in cost, low toxicity and superior performance.
  • the lead of the amalgam only acts as a stabilizer of mercury-vapor yield and does not form any compounds with the mercury.
  • the accompanying plot contains a curve, D, for a fluorescent lamp of equal power rating, using mercury.

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  • Discharge Lamp (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US132392A 1970-05-25 1971-04-08 Low-pressure mercury-vapor gas-discharge fluorescent lamp with amalgam Expired - Lifetime US3683227A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1429911A SU308671A1 (enrdf_load_stackoverflow) 1970-05-25 1970-05-25

Publications (1)

Publication Number Publication Date
US3683227A true US3683227A (en) 1972-08-08

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Family Applications (1)

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US132392A Expired - Lifetime US3683227A (en) 1970-05-25 1971-04-08 Low-pressure mercury-vapor gas-discharge fluorescent lamp with amalgam

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US (1) US3683227A (enrdf_load_stackoverflow)
DE (1) DE2118766C3 (enrdf_load_stackoverflow)
GB (1) GB1320590A (enrdf_load_stackoverflow)
SU (1) SU308671A1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015162A (en) * 1975-07-07 1977-03-29 Westinghouse Electric Corporation Fluorescent lamp having implanted amalgamative metal for mercury vapor regulation
FR2343329A1 (fr) * 1976-03-04 1977-09-30 Philips Nv Lampe a decharge dans la vapeur de mercure a basse pression
WO2007146196A3 (en) * 2006-06-09 2008-07-31 Advanced Lighting Tech Inc Bismuth-zinc-mercury amalgam, fluorescent lamps, and related methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9210171U1 (de) * 1992-07-29 1992-10-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Amalgamkörper bzw. Amalgambildnerkörper für eine Leuchtstofflampe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152278A (en) * 1959-06-12 1964-10-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Fluorescent lamp with low melting amalgam filling
US3160778A (en) * 1961-04-07 1964-12-08 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Highly loaded low pressure mercury vapor discharge lamp
US3526804A (en) * 1967-10-27 1970-09-01 Westinghouse Electric Corp Fluorescent lamp or similar device containing an amalgam of tin-indium-mercury which controls the mercury vapor pressure during operation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152278A (en) * 1959-06-12 1964-10-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Fluorescent lamp with low melting amalgam filling
US3160778A (en) * 1961-04-07 1964-12-08 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Highly loaded low pressure mercury vapor discharge lamp
US3526804A (en) * 1967-10-27 1970-09-01 Westinghouse Electric Corp Fluorescent lamp or similar device containing an amalgam of tin-indium-mercury which controls the mercury vapor pressure during operation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015162A (en) * 1975-07-07 1977-03-29 Westinghouse Electric Corporation Fluorescent lamp having implanted amalgamative metal for mercury vapor regulation
FR2343329A1 (fr) * 1976-03-04 1977-09-30 Philips Nv Lampe a decharge dans la vapeur de mercure a basse pression
WO2007146196A3 (en) * 2006-06-09 2008-07-31 Advanced Lighting Tech Inc Bismuth-zinc-mercury amalgam, fluorescent lamps, and related methods

Also Published As

Publication number Publication date
GB1320590A (en) 1973-06-13
SU308671A1 (enrdf_load_stackoverflow) 1973-10-26
DE2118766A1 (de) 1971-12-09
DE2118766B2 (enrdf_load_stackoverflow) 1974-05-02
DE2118766C3 (de) 1974-11-28

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