US3184629A - Gas-filled electric lamp with a gas-directing screen - Google Patents

Gas-filled electric lamp with a gas-directing screen Download PDF

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Publication number
US3184629A
US3184629A US96778A US9677861A US3184629A US 3184629 A US3184629 A US 3184629A US 96778 A US96778 A US 96778A US 9677861 A US9677861 A US 9677861A US 3184629 A US3184629 A US 3184629A
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US
United States
Prior art keywords
bulb
gas
screen
filament
strips
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
US96778A
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English (en)
Inventor
Jan Willem Van Tijen
Tas Johannes Cornelis Van Der
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
North American Philips Co Inc
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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 US3184629A publication Critical patent/US3184629A/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
    • H01K1/26—Screens; Filters

Definitions

  • the invention relates to a gas-filled electric incandescent lamp which is used in a burning position in which the longitudinal axis of the substantially cylindrical bulb is arranged horizontally, and a screen system for guiding the gas current occurring in the lamp bulb during operation is provided in a zone which lies higher than the filament.
  • this screen system has been arranged above the filament at a given distance from the upper bulb wall and shaped in a form such that the gas ascending along the filament flows downwards along the side Walls substantially in planes at right angles to the longitudinal axis of the bulb.
  • the invention is characterized by a screen system guiding the gas flow parallel to the longitudinal axis and along the upper side of the bulb.
  • the flow of gas heated by the filament then comes into contact with only part of the bulb wall, which part is loaded least by the light emission and the radiation emission.
  • the screen system may comprise at least two strips extending in the longitudinal direction of the bulb and being located on both sides of the vertical plane passing through the longitudinal axis, the upper sides of which strips are situated at a small distance from the adjacent bulb parts, the arrangement being so that the passage through the screen strips has a considerably smaller gas resistance than the passage through the gaps adjacent the upper sides of the screen strips.
  • the planes through the screen strips may intersect each other in a line lying in or below the longitudinal axis and extending parallel to the latter.
  • FIGS. 1 and 2 show a view and a cross-section of a projection lamp according to the invention.
  • FIG. 3 shows a modification of the screen system of this lamp.
  • FIG. 4 is a top plan view of the screen system.
  • the lamp shown in a horizontal burning position according to FIGS. 1 and 2 comprises a gas-filled horizontally arranged and substantially cylindrical bulb 1 fabricated of a transparent material which surrounds a filament 2 and is provided with a conventional lamp cap 3 having axial current supply pins 4.
  • the filament consists of horizontal pieces of wire arranged above each other and wound bihelically, which pieces are electrically connected in series with each other and through conductors 5 and stay wires 6 and 7 to two of the pins 4.
  • the transition areas between the pieces of wire are connected through wires 8 on both sides of the filament with glass rods 9 which are supported by the stay rods 6 and 7.
  • the direction of the optimum emission of light and radiation is in the center of the filament at right angles to the plane of FIG. 1.
  • Eih hfiZfi Patented May 18, 1965 are arranged close to the upper part of the bulb and extending in the longitudinal direction of the bulb. These strips prevent the heated gases ascending along the filament, after they have arrived at the upper part of the bulb, from flowing back laterally and in planes at right angles to the longitudinal axis of the bulb along its cylindrical side walls.
  • the screen strips 1G and 11 may be connected with each other and with the stay wire 6 by means of a strip 12 bent over parallel to the upper bulb wall.
  • a suitable material for the screen system is, for example, nickel having a. thickness of about 0.25 mm.
  • the screen strips 10 and 11 are in a vertical position. They may, however, also be arranged diverging upwards, as is illustrated in FIG. 3, the planes of these strips intersecting each other approximately in the longitudinal axis of the cylindrical bulb.
  • the bulb of the lamp shown in FIGS. 1 and 2 filled at room temperature with argon having a pressure of about 700 rnms. has a diameter of about 40 mms. and a length of about '70 mms.
  • the filament 2 was proportioned for a consumption of energy of about 500 W at an operational temperature of about 3200 K.
  • the screen strips 10 and 11 consisted of nickel gauze of about 25 x 5 mms. They were arranged at a distance of 17 rnrns. from each other and about 0.5 mm. from the bulb wall.
  • the connecting strip 12 was constituted of nickel gauze and its dimensions were approximately 17 x 17 mms.
  • a gas-filled incandescent lamp which in its operating position is located with its longitudinal axis substantially horizontal; comprising a bulb, a filament in said bulb, electrically conducting stay wires supporting said filament, and a screen system for said filament having depending, solid screen strips at opposite sides thereof and a solid connecting part therebetween, said screen strips extending axially in said bulb and located on opposite sides of a vertical plane passing through said longitudinal axis of said lamp and said connecting part extending substantially parallel to the upper bulb wall, the upper ends of said screen strips being a relatively small distance from the adjacent bulb and forming a gap therebetween whereby the passage between the screen strips has a considerably smaller gas resistance than the passage through said gap adjacent to the upper ends of the screen strips.
  • a gas-filled incandescent lamp which in its operating position is located with its longitudinal axis substantially horizontal; comprising a bulb, a filament in said bulb,

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  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Resistance Heating (AREA)
US96778A 1960-04-14 1961-03-20 Gas-filled electric lamp with a gas-directing screen Expired - Lifetime US3184629A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL250599 1960-04-14

Publications (1)

Publication Number Publication Date
US3184629A true US3184629A (en) 1965-05-18

Family

ID=19752286

Family Applications (1)

Application Number Title Priority Date Filing Date
US96778A Expired - Lifetime US3184629A (en) 1960-04-14 1961-03-20 Gas-filled electric lamp with a gas-directing screen

Country Status (5)

Country Link
US (1) US3184629A (enrdf_load_stackoverflow)
CH (1) CH407319A (enrdf_load_stackoverflow)
DE (1) DE1240182B (enrdf_load_stackoverflow)
GB (1) GB956975A (enrdf_load_stackoverflow)
NL (1) NL112992C (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3457449A (en) * 1966-06-03 1969-07-22 Philips Corp Incandescent lamp having a filament surrounded by a wire screen
US3471737A (en) * 1966-06-03 1969-10-07 Philips Corp Screen for lamp filament

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1635116A (en) * 1925-01-09 1927-07-05 Breuil Winfield R Du Headlight
US2862125A (en) * 1956-01-06 1958-11-25 Sylvania Electric Prod Heat shield for incandescent lamp
US2973443A (en) * 1959-06-10 1961-02-28 Gen Electric Electric incandescent lamp

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151522A (en) * 1937-09-22 1939-03-21 Westinghouse Electric & Mfg Co Incandescent lamp with means to reduce bulb blackening

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1635116A (en) * 1925-01-09 1927-07-05 Breuil Winfield R Du Headlight
US2862125A (en) * 1956-01-06 1958-11-25 Sylvania Electric Prod Heat shield for incandescent lamp
US2973443A (en) * 1959-06-10 1961-02-28 Gen Electric Electric incandescent lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3457449A (en) * 1966-06-03 1969-07-22 Philips Corp Incandescent lamp having a filament surrounded by a wire screen
US3471737A (en) * 1966-06-03 1969-10-07 Philips Corp Screen for lamp filament

Also Published As

Publication number Publication date
DE1240182B (de) 1967-05-11
NL112992C (enrdf_load_stackoverflow)
CH407319A (de) 1966-02-15
GB956975A (en) 1964-04-29

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