US3740604A - Electric gas-discharge lamp - Google Patents

Electric gas-discharge lamp Download PDF

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Publication number
US3740604A
US3740604A US00124823A US3740604DA US3740604A US 3740604 A US3740604 A US 3740604A US 00124823 A US00124823 A US 00124823A US 3740604D A US3740604D A US 3740604DA US 3740604 A US3740604 A US 3740604A
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US
United States
Prior art keywords
burner
tube
elongated
discharge lamp
electric gas
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
US00124823A
Other languages
English (en)
Inventor
J Fauroux
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.)
Societe Nationale des Petroles dAquitaine SA
Original Assignee
Societe Nationale des Petroles dAquitaine SA
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 Societe Nationale des Petroles dAquitaine SA filed Critical Societe Nationale des Petroles dAquitaine SA
Application granted granted Critical
Publication of US3740604A publication Critical patent/US3740604A/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
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers

Definitions

  • Existing electric gas-discharge lamps make use of a burner consisting of a transparent container into which a quantity of a volatilizable substance is introduced, with two electrodes projecting into it, conveying electric voltage from an outside source; this burner being enclosed in a tube, also transparent, through which pass the conductors connecting the electrodes and the voltage source.
  • the annular space between the tube and burner contains either a primary vacuum or a neutral gas, such as nitrogen, under some pressure.
  • the burner is held inside the tube by cross-struts, so that it has some play along its axis, causing mechanical stresses in the tube which can break it.
  • a glaziers lathe is needed to repair the tube, which means that the lamp is out of service for several days.
  • the present invention allows manual fitting of the tube and moderate lengthwise tightening of the burner, allowing it to expand, but holding it in place and thus preventing stress on the tube.
  • the electric gas-discharge lamp according to the present invention consists of an elongated burner, filled with a volatilizable substance and with an electrode at each end, and a tube surrounding it, and is characterized by the fact that the elongated tube has at least one concave end section.
  • this concave section includes an evacuation tube (a glass tube used to create a vacuum inside a lamp before closing it), and a rod of adjustable length rests on the struts supporting the burner, holding it steady inside the tube and thus preventing mechanical damage to the lamp.
  • evacuation tube a glass tube used to create a vacuum inside a lamp before closing it
  • rod of adjustable length rests on the struts supporting the burner, holding it steady inside the tube and thus preventing mechanical damage to the lamp.
  • the burner is held in position lengthwise by a fixed strut and by the rod, which is adjustable lengthwise, and which carries a spring at the end in contact with the burner.
  • FIG. 1 shows a cross-sectional view of a lamp according to the invention.
  • FIG. 2 shows the same lamp, equipped with an attachment rod.
  • the tube 1 encloses the burner 2, which is a quartz cylinder, greater in length than in diameter.
  • This cylinder is supported by struts such as 3 and 4, which hold it in the center of the tube 1.
  • These struts contain insulating passages such as 5, through which pass electrical conductors 6 and 7. These are connected to the electrodes 11 and 12, at opposite ends of the burner.
  • the tube 1 is closed at one end by a concave surface 8, made from the same material as the tube, and containing two tungsten-pyrex, tungstenquartz or molybdenum-quartz passages 9 and 10 connected to the conductor wires 6 and 7.
  • This concave surface replaces the convex section normally used, and it has the advantage, for assembly of the lamp, of being able to be fitted into the end of the tube, with the edges of the tube and of the concave part being positioned together in such a way as to make manual welding of the two parts possible.
  • FIG. 2 shows a more highly perfected embodiment. Components common to FIGS. 1 and 2 carry the same references.
  • theconcave section 8 contains a central glass tube, opposite which inside the tube is a rod 14, with a threaded section which passes through a nut 13 on one of the struts 3.
  • a slot At the end of the rod facing the glass tube there is a slot, allowing it to be turned with a screwdriver.
  • a socket At the other end of the rod is a socket in which can be fitted a spring 15, which also presses against the end of the burner 2.
  • the rod and the nut holding'it are inserted before the concave section 8 is fitted, and they wedge the burner inside the tube 1.
  • the rod 14 can be tightened with a screwdriver so as to block the burner properly.
  • the spring 15 at the end of the rod presses against the burner and allows for its thermal expansion. Once this has been adjusted, the annular space is either emptied to create a vacuum, or filled with nitrogen, and the evacuation tube atthe end is welded to close it.
  • the concave section of the lamp is also filled with resin 16, to cement the quartz-metal or pyrex-metal electrical passages 9 and 10.
  • An electric gas-discharge lamp consisting of an elongated burner, filled with a volatilizable substance and with an electrode at either end, struts supporting said burner, an elongated tube surrounding said burner and having at least one concave end section, the concave section including an evacuation tube, and a rod of adjustable length resting on the struts supporting the burner, holding it steady inside the tube and thus preventing mechanical damage to the lamp.
  • An electric gas-discharge lamp consisting of an elongated burner, filled with a volatilizable substance and with an electrode at either end, struts supporting said burner, an elongated tube surrounding said burner and having at least one concave end section, the burner being held in a fixed position by one of the struts which is fixed and by a rod, which is adjustable lengthwise, which is supported by another strut, and which has a spring at the end in contact with the burner.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
US00124823A 1970-03-17 1971-03-16 Electric gas-discharge lamp Expired - Lifetime US3740604A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7009499A FR2082471A5 (enrdf_load_stackoverflow) 1970-03-17 1970-03-17

Publications (1)

Publication Number Publication Date
US3740604A true US3740604A (en) 1973-06-19

Family

ID=9052383

Family Applications (1)

Application Number Title Priority Date Filing Date
US00124823A Expired - Lifetime US3740604A (en) 1970-03-17 1971-03-16 Electric gas-discharge lamp

Country Status (8)

Country Link
US (1) US3740604A (enrdf_load_stackoverflow)
BE (1) BE764324A (enrdf_load_stackoverflow)
DE (1) DE2112687A1 (enrdf_load_stackoverflow)
FR (1) FR2082471A5 (enrdf_load_stackoverflow)
GB (1) GB1342841A (enrdf_load_stackoverflow)
LU (1) LU62795A1 (enrdf_load_stackoverflow)
NL (1) NL7103485A (enrdf_load_stackoverflow)
SU (1) SU372858A3 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3320508C2 (de) * 1983-06-07 1986-08-07 W.C. Heraeus Gmbh, 6450 Hanau Elektrische Entladungslampe
JPH08162007A (ja) * 1994-12-06 1996-06-21 Koito Mfg Co Ltd 放電ランプ装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3148300A (en) * 1961-08-04 1964-09-08 Gen Electric Lamp having envelope of glass opaque to ultraviolet radiation
GB987939A (en) * 1962-04-12 1965-03-31 Philips Electronic Associated Improvements in and relating to a discharge lamp of the kind comprising a gas discharge tube

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3148300A (en) * 1961-08-04 1964-09-08 Gen Electric Lamp having envelope of glass opaque to ultraviolet radiation
GB987939A (en) * 1962-04-12 1965-03-31 Philips Electronic Associated Improvements in and relating to a discharge lamp of the kind comprising a gas discharge tube

Also Published As

Publication number Publication date
LU62795A1 (enrdf_load_stackoverflow) 1971-08-23
SU372858A3 (enrdf_load_stackoverflow) 1973-03-01
BE764324A (fr) 1971-08-16
DE2112687A1 (de) 1971-09-30
FR2082471A5 (enrdf_load_stackoverflow) 1971-12-10
NL7103485A (enrdf_load_stackoverflow) 1971-09-21
GB1342841A (en) 1974-01-03

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