US3706900A - Projection filament lamp - Google Patents

Projection filament lamp Download PDF

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Publication number
US3706900A
US3706900A US113876A US3706900DA US3706900A US 3706900 A US3706900 A US 3706900A US 113876 A US113876 A US 113876A US 3706900D A US3706900D A US 3706900DA US 3706900 A US3706900 A US 3706900A
Authority
US
United States
Prior art keywords
lamp
conductors
filament lamp
electric filament
pinch seal
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
US113876A
Other languages
English (en)
Inventor
Ferdinandus Maria Josephu Beek
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
Original Assignee
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 US3706900A publication Critical patent/US3706900A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/38—Seals for leading-in conductors

Definitions

  • the invention relates to an electric filament lamp, in
  • a halogen projection lamp in which the current supply conductors of the filament arranged at right angles to the longitudinal direction of the lamp are secured in a pinch seal present at one end of the lamp, each 'of the conductors being surrounded by a member which supports said conductors and is incorporated at its one end in the pinched seal and is situated at its other end in the lamp space.
  • a filament lamp is known from the U.S. Pat. specification No. 3,470,410.
  • the two singlecoiled current supply conductors which are connected to a coiled-coil'filament are each surrounded by helically wound supportings spiral of equal lengths which are incorporated at their one end in the pinch seal and project in the lamp space at their other end.
  • the two supporting members which are preferably also constructed as helically wound wires, project in the lamp space over mutually unequal distances. This is probably due to the fact that in a lamp having supporting members of unequal lengths, fewer resonance deformations occur than in a lamp in which the supporting members are equally long. It has also been surprisingly found that the light are which upon fusing of a lamp is formed between two fusing conductors, is extinguished sooner when the conductors have mutually unequal lengths.
  • Reference numeral 7 denotes a tungsten flattened filament'viewed against the largest face thereof.
  • the straight ends 9' and 11 of said elements are incorporated in the pinch seal and secured to'foils 13 and 15 of molybdenum.
  • 17 and 19 denote external conductors given a length between 20 and 90 percent of the length secured to the foils l3 and 15.
  • the filament lamp shown comprises two helically wound supporting members 21' and 23 surrounding the ends 9 and 11. These supporting members are also incorporated each at one of their ends in the pinch seal,
  • the length of the member 21 is 5.5 mm and that of the member 23 is 10 mm.
  • Both members are formed as helically wound wires of tungsten having 'a diameter of l00/um. They surround the straight ends 9 and 11, which have a diameter of 120 mm, with a clearance of approximately 0.1 mm.
  • An electric filament lamp in particular a halogen projection lamp, in which the current supply conductors of the filament arranged at right angles to the longitudinal direction of the lamp are secured in a pinch seal present at one end of the lamp, each of the conductors being surrounded by a member which supports said conductors and is incorporated at its one end in the pinched seal and is located at its other end in the lamp space, wherein the members supporting the relative conductors have unequal lengths calculated from the pinch seal.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Electric Stoves And Ranges (AREA)
  • Connecting Device With Holders (AREA)
US113876A 1970-02-18 1971-02-09 Projection filament lamp Expired - Lifetime US3706900A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7002305.A NL156537B (nl) 1970-02-18 1970-02-18 Projectiegloeilamp.

Publications (1)

Publication Number Publication Date
US3706900A true US3706900A (en) 1972-12-19

Family

ID=19809367

Family Applications (1)

Application Number Title Priority Date Filing Date
US113876A Expired - Lifetime US3706900A (en) 1970-02-18 1971-02-09 Projection filament lamp

Country Status (6)

Country Link
US (1) US3706900A (enExample)
JP (1) JPS5135792B1 (enExample)
CA (1) CA918222A (enExample)
FR (1) FR2078769A5 (enExample)
GB (1) GB1283889A (enExample)
NL (1) NL156537B (enExample)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4514780A (en) * 1983-01-07 1985-04-30 Wm. Neundorfer & Co., Inc. Discharge electrode assembly for electrostatic precipitators
US4578616A (en) * 1984-06-07 1986-03-25 General Electric Company Tungsten halogen incandescent lamp having an improved mounting structure
US4968916A (en) * 1989-09-08 1990-11-06 General Electric Company Xenon-metal halide lamp particularly suited for automotive applications having an improved electrode structure
US20060043898A1 (en) * 2004-08-24 2006-03-02 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Electric incandescent lamp

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2226281A (en) * 1939-12-09 1940-12-24 Aurex Corp Vacuum tube filament
US2404992A (en) * 1946-07-30 Lamp filament connection

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2404992A (en) * 1946-07-30 Lamp filament connection
US2226281A (en) * 1939-12-09 1940-12-24 Aurex Corp Vacuum tube filament

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4514780A (en) * 1983-01-07 1985-04-30 Wm. Neundorfer & Co., Inc. Discharge electrode assembly for electrostatic precipitators
US4578616A (en) * 1984-06-07 1986-03-25 General Electric Company Tungsten halogen incandescent lamp having an improved mounting structure
US4968916A (en) * 1989-09-08 1990-11-06 General Electric Company Xenon-metal halide lamp particularly suited for automotive applications having an improved electrode structure
US20060043898A1 (en) * 2004-08-24 2006-03-02 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Electric incandescent lamp

Also Published As

Publication number Publication date
NL156537B (nl) 1978-04-17
DE2105155B2 (de) 1976-05-20
CA918222A (en) 1973-01-02
GB1283889A (en) 1972-08-02
FR2078769A5 (enExample) 1971-11-05
DE2105155A1 (de) 1971-09-02
JPS5135792B1 (enExample) 1976-10-05
NL7002305A (enExample) 1971-08-20

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