GB1319105A - Low-pressure mercury vapour discharge lamp containing amalgam - Google Patents

Low-pressure mercury vapour discharge lamp containing amalgam

Info

Publication number
GB1319105A
GB1319105A GB3245170A GB3245170A GB1319105A GB 1319105 A GB1319105 A GB 1319105A GB 3245170 A GB3245170 A GB 3245170A GB 3245170 A GB3245170 A GB 3245170A GB 1319105 A GB1319105 A GB 1319105A
Authority
GB
United Kingdom
Prior art keywords
amalgam
lamp
fittings
run
metal
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
GB3245170A
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of GB1319105A publication Critical patent/GB1319105A/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
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury

Landscapes

  • Discharge Lamp (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

1319105 Metal vapour lamps PATENTTREUHAND - GES FUR ELEKTRISCHE GLUHLAMPEN mbH 3 July 1970 [25 July 1969] 32451/70 Heading H1D A low pressure Hg vapour discharge lamp, e.g. a fluorescent lamp, with a power input of less than 0À7 W/cm., contains an indiumamalgam as a main amalgam determining the equilibrium operating vapour pressure with an In-Hg wt. ration of 12 : 1 to 3 : 1, (e.g. 6 : 1), the main amalgam or the respective amalgamforming metal 12 being located at positions adjacent the lamp ends within the lamp which have an operating temperature of from 80‹ to 110‹ C., (e.g. 95‹ C.), the lamp containing one or more additional amalgams or amalgam forming metals accelerating the run-up of the lamp in places which are much hotter during run-up of the lamp than the position of the main amalgam, the additional amalgams attaining their operation temperature earlier than the main amalgam. The additional amalgam is preferably an indium alloy, applied on the electrode cap. A place of low heat capacity closer to the electrode than that of the main amalgam such as a stem pinch with a spray deposited spot of indium is suitable for a second run up amalgam, this amalgam delivering Hg after the amalgam on the electrode cap, but before the main amalgam. The In may be sprayed in liquid state on to an electrode stem flare as an annular film, Fig. 1 shows exhaust tube 8, electrode coil 9 pasted with oxide, surrounded by annular metal cap 10 of sheet iron, with amalgam forming metal strip 11, preferably In-Sn-Pb in wt. ratio 2 : 6 : 2, in amount 5 to 10 mgrms., stem flare 4 with 60 grms. of indium metal 12 as main amalgam forming metal, and 5 to 10 mgrms. spray deposited In spot 13. Fig. 2 (not shown) illustrates luminous flux against ambient temperature for open batten type fittings, downwards opening reflector fittings, lowered fittings, trough-shaped and coffered fittings and moisture proof fittings. Fig. 3 (not shown) illustrates run up characteristics with two, one and no run up amalgams in curves 1, 2, and 3 respectively. Reference has been directed by the Comptroller to Specification 1,192,999.
GB3245170A 1969-07-25 1970-07-03 Low-pressure mercury vapour discharge lamp containing amalgam Expired GB1319105A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1937938A DE1937938C3 (en) 1969-07-25 1969-07-25 Mercury vapor low pressure discharge lamp with major and minor amalgam

Publications (1)

Publication Number Publication Date
GB1319105A true GB1319105A (en) 1973-06-06

Family

ID=5740925

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3245170A Expired GB1319105A (en) 1969-07-25 1970-07-03 Low-pressure mercury vapour discharge lamp containing amalgam

Country Status (8)

Country Link
US (1) US3629641A (en)
AT (1) AT300956B (en)
BE (1) BE753899A (en)
CH (1) CH508274A (en)
DE (1) DE1937938C3 (en)
FR (1) FR2055635A5 (en)
GB (1) GB1319105A (en)
SE (1) SE376683B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5767617A (en) * 1995-10-18 1998-06-16 General Electric Company Electrodeless fluorescent lamp having a reduced run-up time
US5789855A (en) * 1995-10-18 1998-08-04 General Electric Company Amalgam Positioning in an electrodeless fluorescent lamp

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898720A (en) * 1972-09-28 1975-08-12 Westinghouse Electric Corp Method of providing a fluorescent lamp stem with an integral mercury-vapor pressure regulating means
DE2330391A1 (en) * 1973-06-14 1975-01-09 Patra Patent Treuhand LOW PRESSURE MERCURY VAPOR DISCHARGE LAMP WITH AMALGAM
DE2339056A1 (en) * 1973-08-01 1975-02-13 Patra Patent Treuhand LOW PRESSURE MERCURY VAPOR DISCHARGE LAMP WITH AMALGAM
DE2510379A1 (en) * 1975-03-10 1976-09-30 Patra Patent Treuhand LOW PRESSURE MERCURY VAPOR DISCHARGE LAMP WITH AMALGAM
US4015162A (en) * 1975-07-07 1977-03-29 Westinghouse Electric Corporation Fluorescent lamp having implanted amalgamative metal for mercury vapor regulation
US4105910A (en) * 1976-04-23 1978-08-08 Westinghouse Electric Corp. Fluorescent lamp with an integral fail-safe and auxiliary-amalgam component
US4528209A (en) * 1978-10-25 1985-07-09 General Electric Company Use of amalgams in solenoidal electric field lamps
US4698549A (en) * 1984-07-02 1987-10-06 General Electric Company D.C. lamp discharge gas pumping control
US5095336A (en) * 1990-11-08 1992-03-10 Xerox Corporation Temperature control of a fluorescent lamp having a central and two end amalgam patches
US5237240A (en) * 1991-12-04 1993-08-17 Gte Products Corporation Mercury vapor discharge lamp containing device for heating amalgam-forming material
TW344018B (en) * 1994-07-15 1998-11-01 Philips Electronics Nv Low-pressure mercury vapor discharge lamp
EP1004138B1 (en) * 1998-05-22 2004-10-27 Koninklijke Philips Electronics N.V. Low-pressure mercury vapor discharge lamp
WO2001015204A1 (en) * 1999-08-19 2001-03-01 Koninklijke Philips Electronics N.V. Low-pressure mercury vapor discharge lamp
WO2002080224A2 (en) * 2001-03-29 2002-10-10 Koninklijke Philips Electronics N.V. Low/pressure mercury vapor discharge lamp
DE102020203417A1 (en) * 2020-03-17 2021-09-23 Heraeus Noblelight Gmbh Low pressure mercury vapor discharge lamp and lamp system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1140286B (en) * 1961-04-07 1962-11-29 Patra Patent Treuhand Mercury low-pressure discharge lamp with increased electrical and / or thermal load capacity, in particular fluorescent lamp
US3392298A (en) * 1962-08-31 1968-07-09 Sylvania Electric Prod Fluorescent lamp using an indiummercury amalgam band for pressure control
US3227907A (en) * 1962-12-31 1966-01-04 Sylvania Electric Prod Electric discharge lamp with integral pressure regulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5767617A (en) * 1995-10-18 1998-06-16 General Electric Company Electrodeless fluorescent lamp having a reduced run-up time
US5789855A (en) * 1995-10-18 1998-08-04 General Electric Company Amalgam Positioning in an electrodeless fluorescent lamp

Also Published As

Publication number Publication date
FR2055635A5 (en) 1971-05-07
DE1937938C3 (en) 1980-10-09
DE1937938A1 (en) 1971-02-04
AT300956B (en) 1972-07-15
SE376683B (en) 1975-06-02
CH508274A (en) 1971-05-31
BE753899A (en) 1970-12-31
US3629641A (en) 1971-12-21
DE1937938B2 (en) 1980-01-31

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee