US3484637A - Mercury vapour discharge lamp - Google Patents

Mercury vapour discharge lamp Download PDF

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Publication number
US3484637A
US3484637A US708277A US3484637DA US3484637A US 3484637 A US3484637 A US 3484637A US 708277 A US708277 A US 708277A US 3484637D A US3484637D A US 3484637DA US 3484637 A US3484637 A US 3484637A
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US
United States
Prior art keywords
tube
approximately
discharge lamp
mercury vapour
vapour discharge
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
US708277A
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English (en)
Inventor
Henricus Johannes Joseph Boort
Cornelis Adrianus Joann Jacobs
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.)
US Philips Corp
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US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3484637A publication Critical patent/US3484637A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers

Definitions

  • the invention provides a more satisfactory solution for avoiding these disadvantages and consists in that the conductor extending along the discharge tube is screened by an electrically non-conducting material which is substantially impervious to ultraviolet radiation.
  • tubular glass screen for this purpose, use is preferably made of tubular glass screen, ceramic material and the like.
  • the wall thickness of such a tube is preferably at least 0.2 mm.
  • a straight high-pressure mercury vapor discharge tube is provided with electrodes 2 and 3 of which electrode 2 P CC is connected in the usual manner via a long lead-in and supporting wire 4 with the aid of a bipolar screw cap 6 to oneiend in the drawing end of the evacuated outer envelope 7 surrounding the assembly.
  • a short supporting and leadin wire Sis provided for electrode 3.
  • the embodiment tube 1 is quartz glass and is provided with an ignition electrode 9 connected through a resistor 10 to the conductor 4.
  • the distance between the electrodes 2 and 3 was approximately 50 mm. and the inner volume was approximately 15 cm.
  • the tube 1 contained :60 mgs. of mercury which evaporated completely during normal operation and produced an operating voltage of approximately v. at a minimum wall temperature of approximately 580 C. (at a power of approximately 400 w.).
  • the tube further contained approximately 3 mgs. of sodium iodide 10.3 mg. of thallium iodide and :0.06 mg. of indium iodide per cm.”
  • the ignition gas used was argon at a pressure of approximately 20 mm.Hg.
  • the nickel wire 4 extending along the discharge tube 1 at a distance of :10 mm. and having a thickness of :2 mm. was surrounded by a tube 8 of an electrically non-conducting ceramic material impervious to ultraviolet radiation.
  • the wall thickness of the tube was aproximately 0.5 mm. and its length was approximately 100 mm.
  • the ceramic material contained i94% by weight of A1 0 and '-6% by weight of SiO Initially, the lamp had a light output of approximately 80 lumens/w. and an ignition voltage of 250 v. After approximately 5000 operating hours, the ignition voltage had increased to 400 v. and the operating voltage to v.; the light output had decreased to 70 lumens/w.
  • the improvement obtained using the ceramic tube 8 is probably due to the fact that the ultraviolet radiation of the tube 1 can no longer release any photo-electrons on the wire 4. Released electrons can reach the outer side of the discharge tube 1, which apparently results in sodium diffusing through the wall of the discharge tube 1 and hence in the occurence of the said disadvantageous phenomena.
  • the same disadvantageous phenomena occur with the use of other alkali metals, for example lithium.
  • a high-pressure mercury vapor discharge lamp comprising a discharge tube containing mercury and an alkali iodide, a pair of electrodes at opposite ends of said tube, an outer envelope surrounding and spaced from said tube, at least one conductor extending along the discharge tube and electrically connected tonne of the electrodes, and
  • an electrically non-conducting screen consisting of a material substantially impervious to ultraviolet radiation surrounding said conductor.
US708277A 1967-03-03 1968-02-26 Mercury vapour discharge lamp Expired - Lifetime US3484637A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6703447A NL6703447A (de) 1967-03-03 1967-03-03

Publications (1)

Publication Number Publication Date
US3484637A true US3484637A (en) 1969-12-16

Family

ID=19799460

Family Applications (1)

Application Number Title Priority Date Filing Date
US708277A Expired - Lifetime US3484637A (en) 1967-03-03 1968-02-26 Mercury vapour discharge lamp

Country Status (6)

Country Link
US (1) US3484637A (de)
BE (1) BE711585A (de)
DE (1) DE1639084B2 (de)
FR (1) FR1555294A (de)
GB (1) GB1186632A (de)
NL (1) NL6703447A (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4976359A (de) * 1972-09-22 1974-07-23
US3895248A (en) * 1969-03-11 1975-07-15 Philips Corp Gas discharge device with glow discharge igniting structure
US3996487A (en) * 1975-05-14 1976-12-07 Westinghouse Electric Corporation Ceramic discharge lamp with reduced heat drain
US4281274A (en) * 1979-08-01 1981-07-28 General Electric Co. Discharge lamp having vitreous shield
US4401916A (en) * 1979-04-03 1983-08-30 U.S. Philips Corporation High-pressure discharge lamp
EP0160972A2 (de) * 1984-05-07 1985-11-13 GTE Products Corporation Mittel zur Verringerung von Alkalimetallverlust
US4633136A (en) * 1982-04-20 1986-12-30 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh High-pressure discharge lamp with low power input
DE3735523A1 (de) * 1986-10-20 1988-04-28 Tungsram Reszvenytarsasag Alkali-halogenid als zusatz enthaltende metallhalogen-entladungslampe
US4866328A (en) * 1988-04-15 1989-09-12 North American Philips Corp. Electric lamp with reduced internal photoelectron production
US4942330A (en) * 1988-09-30 1990-07-17 Gte Products Corporation Lamp assembly utilizing shield and ceramic fiber mesh for containment
US5272407A (en) * 1991-12-18 1993-12-21 North American Philips Corporation Electric lamp having screens for reducing photo electron emission
US5339001A (en) * 1992-10-15 1994-08-16 North American Philips Corporation Electric lamp having improved support straps for planar seals
WO1995010120A1 (de) * 1993-10-06 1995-04-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Metallhalogenidentladungslampe
US20090015162A1 (en) * 2003-06-30 2009-01-15 Koninklijke Philips Electronics N.V. Electric Lamp Having Strapless Support Mount for Mh Arc Tubes
US20100253219A1 (en) * 2007-05-24 2010-10-07 Auralight International Ab High pressure sodium lamp

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3619068C2 (de) * 1986-06-06 1996-08-22 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Kompakte Metallhalogenidentladungslampe
DE9002959U1 (de) * 1990-03-15 1990-05-17 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen, De

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3424935A (en) * 1965-04-19 1969-01-28 Sylvania Electric Prod Harness construction for metal arc type lamp

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3424935A (en) * 1965-04-19 1969-01-28 Sylvania Electric Prod Harness construction for metal arc type lamp

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3895248A (en) * 1969-03-11 1975-07-15 Philips Corp Gas discharge device with glow discharge igniting structure
JPS4976359A (de) * 1972-09-22 1974-07-23
JPS5245431B2 (de) * 1972-09-22 1977-11-16
US3996487A (en) * 1975-05-14 1976-12-07 Westinghouse Electric Corporation Ceramic discharge lamp with reduced heat drain
US4401916A (en) * 1979-04-03 1983-08-30 U.S. Philips Corporation High-pressure discharge lamp
US4281274A (en) * 1979-08-01 1981-07-28 General Electric Co. Discharge lamp having vitreous shield
US4633136A (en) * 1982-04-20 1986-12-30 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh High-pressure discharge lamp with low power input
EP0160972A2 (de) * 1984-05-07 1985-11-13 GTE Products Corporation Mittel zur Verringerung von Alkalimetallverlust
EP0160972A3 (en) * 1984-05-07 1987-11-04 Gte Products Corporation High intensity discharge lamp alkali metal loss reduction means
US4843266A (en) * 1986-10-20 1989-06-27 Tungsram Reszvenytarsasag Metal-halogen discharge lamp with conically shaped insulating elements in outer envelope
DE3735523A1 (de) * 1986-10-20 1988-04-28 Tungsram Reszvenytarsasag Alkali-halogenid als zusatz enthaltende metallhalogen-entladungslampe
US4866328A (en) * 1988-04-15 1989-09-12 North American Philips Corp. Electric lamp with reduced internal photoelectron production
US4942330A (en) * 1988-09-30 1990-07-17 Gte Products Corporation Lamp assembly utilizing shield and ceramic fiber mesh for containment
US5272407A (en) * 1991-12-18 1993-12-21 North American Philips Corporation Electric lamp having screens for reducing photo electron emission
US5339001A (en) * 1992-10-15 1994-08-16 North American Philips Corporation Electric lamp having improved support straps for planar seals
WO1995010120A1 (de) * 1993-10-06 1995-04-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Metallhalogenidentladungslampe
US5729091A (en) * 1993-10-06 1998-03-17 Patent-Treuhand-Gesellschaft F. Electrische Gluehlampen Mbh Metal halide discharge lamp
US20090015162A1 (en) * 2003-06-30 2009-01-15 Koninklijke Philips Electronics N.V. Electric Lamp Having Strapless Support Mount for Mh Arc Tubes
US20100253219A1 (en) * 2007-05-24 2010-10-07 Auralight International Ab High pressure sodium lamp
US8198814B2 (en) * 2007-05-24 2012-06-12 Auralight International Ab High pressure sodium lamp with a shielding member between two arc tubes

Also Published As

Publication number Publication date
NL6703447A (de) 1968-09-04
GB1186632A (en) 1970-04-02
BE711585A (de) 1968-09-02
DE1639084B2 (de) 1976-07-22
DE1639084A1 (de) 1970-05-27
FR1555294A (de) 1969-01-24

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