US2100879A - Electric lamp - Google Patents

Electric lamp Download PDF

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Publication number
US2100879A
US2100879A US93236A US9323636A US2100879A US 2100879 A US2100879 A US 2100879A US 93236 A US93236 A US 93236A US 9323636 A US9323636 A US 9323636A US 2100879 A US2100879 A US 2100879A
Authority
US
United States
Prior art keywords
leads
bulb
filament
lamp
particles
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
US93236A
Other languages
English (en)
Inventor
Richard E Smith
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.)
General Electric Co
Original Assignee
General Electric Co
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
Priority to NL47365D priority Critical patent/NL47365C/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US93236A priority patent/US2100879A/en
Priority to FR824594D priority patent/FR824594A/fr
Priority to GB21045/37A priority patent/GB480511A/en
Application granted granted Critical
Publication of US2100879A publication Critical patent/US2100879A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/52—Means for obtaining or maintaining the desired pressure within the vessel
    • H01K1/54—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering

Definitions

  • My invention relates to electric lamps and more particularly-to such lamps having a gas filling. Still more particularly, my invention relates to means for preventing the blackening of the bulbs or envelopes of such lamps.
  • gas-filled electric lamps having a light source of refractory metal such as tungsten
  • vaporized particles of the metal are carried by the convection currents within the bulb and are deposited on the walls of the said bulb in the form of a dark coating which absorbs some of the light and thereby reduces the useful life of the lamp.
  • One of the objects of my invention is to provide a simple means for efiectively preventing the blackening of the bulbs of gas-filled lamps.
  • bulb blackening is prevented by means of a screen, preferably a metal screen, located above the light source so as to be in the path of particles vaporized therefrom, the screen being so arranged as to provide a comparatively large surface extending along the path of the convection currents in the bulb for receiving the deposit of vaporized particles without materially affecting the path of the convection;
  • Fig. 1 is an elevation of a high intensity gas-filled incandescent lamp comprising my invention
  • Fig. 2 is a section takenalong the line 2--2 of Fig. l.
  • the lamp illustrated is of the so-called bipost type disclosed in Un'itcup or flare l3 secured thereto and sealed at its.
  • a filament l5 preferably of tungsten, is mounted in the lower end of the bulb I0 and is of the monoplane type in which the coiled sections are located substantially in a single plane which preferably passes through the longitudinal axis of the bulb l0.
  • Each of the ends of the said filament is secured to one of the leads l4 and the intermediate portions thereof are supported by the ends of upper and lower support wires l6 and ll.
  • the opposite ends of said support wires l8 and I! are securedto bridges or blocks I8 and i9 respectively of insulating material extending between the leads IQ and secured thereto by pieces 5 of wire '26.
  • Blackening of the bulb l 0 is prevented and vaporized particles from the filament l5 are collected by a pair of wirescreens 2i each mounted on and preferably electrically connected to one to of the leads i i and extending to a position adjacent the opposite lead.
  • the screens may be made of nickel and are preferably spot welded to the leads by means of narrow strips of metal 22 placed over the ends thereof. Additional sup- 15 p be in the path of particles vaporized therefrom.
  • the screens extend longitudinally of the bulb a substantial distance so as to provide a comparatively long surface which does notexcessiveiy impede the normal circulation of the gas in the bulb and yet readily collects the vaporized particles.
  • the action of the screen appears to beprincipally a mechanical one of intercepting the vaso porized particles carried along the screen by the convection currents.
  • electrically connecting .the screens tothe leads so that they are at the same potential as the leads, thereby creating 3 an electrical field between them, and also an .electric field between each screen and the lamp filament, which acts on the charged particles vaporized from the filament to cause them to be deposited on the screens.
  • An electric lamp comprising .a bulb having 66 a gaseous atmosphere therein, a metallic light source in said bulb defining a substantially vertical plane and a fiat screen located substantially in the plane of said light source and above said light source when the lamp is in use so as to extend along the path of particles vaporized from said light source.
  • An electric lamp comprising a bulb having a gaseous atmosphere therein, a pair of leads extending longitudinally of said bulb, a metallic filament located between said leads substantially in the single longitudinal and vertical plane passing through said leads and electrically connected at each end to one of said leads, and a flat screen located between said leads and substantially in the said plane passing through said leads and above said filament when the lamp is in use so as to extend along the path of particles vaporized from said filament.
  • An electric lamp comprising a bulb having a gaseous atmosphere therein, a pair of leads extending longitudinally of said bulb, a metallic filament located between said leads substantially in the single longitudinal and vertical plane passing through said leads and electrically connected at each end to one of said leads, and a fiat metallic screen located between said leads and substantially in the said plane passing through said leads and above said filament when the lamp is in use so as to extend along the path of particles vaporized from said filament, said screen being electrically connected to one of said leads.
  • An electric lamp comprising a bulb having a gaseous filling therein, a pair of leads extending longitudinally of said bulb, a metallic filament of the monoplane type located between said leads in the plane passing through said leads and electrically connected at each end to one of said leads, and a pair of fiat metallic screens each mounted on and electrically connected to one of said leads and extending to a position adjacent the other lead, said screens being closely adjacent to the plane passing through said leads and being located above said filament when the lamp is in use so as to be in the path of particles vaporized from said filament.

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  • Vessels And Coating Films For Discharge Lamps (AREA)
US93236A 1936-07-29 1936-07-29 Electric lamp Expired - Lifetime US2100879A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL47365D NL47365C (en)) 1936-07-29
US93236A US2100879A (en) 1936-07-29 1936-07-29 Electric lamp
FR824594D FR824594A (fr) 1936-07-29 1937-07-21 Perfectionnements aux lampes électriques
GB21045/37A GB480511A (en) 1936-07-29 1937-07-29 Improvements in and relating to electric incandescent lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US93236A US2100879A (en) 1936-07-29 1936-07-29 Electric lamp

Publications (1)

Publication Number Publication Date
US2100879A true US2100879A (en) 1937-11-30

Family

ID=22237867

Family Applications (1)

Application Number Title Priority Date Filing Date
US93236A Expired - Lifetime US2100879A (en) 1936-07-29 1936-07-29 Electric lamp

Country Status (4)

Country Link
US (1) US2100879A (en))
FR (1) FR824594A (en))
GB (1) GB480511A (en))
NL (1) NL47365C (en))

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922510A (en) * 1956-05-18 1960-01-26 Kolman Mfg Company Screening plant
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
US3555338A (en) * 1967-03-10 1971-01-12 Sylvania Electric Prod Incandescent lamp
USD581062S1 (en) * 2007-03-02 2008-11-18 Panasonic Corporation Lamp filament
USD581064S1 (en) * 2007-03-02 2008-11-18 Panasonic Corporation Lamp filament

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922510A (en) * 1956-05-18 1960-01-26 Kolman Mfg Company Screening plant
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
US3555338A (en) * 1967-03-10 1971-01-12 Sylvania Electric Prod Incandescent lamp
USD581062S1 (en) * 2007-03-02 2008-11-18 Panasonic Corporation Lamp filament
USD581064S1 (en) * 2007-03-02 2008-11-18 Panasonic Corporation Lamp filament
USD588288S1 (en) 2007-03-02 2009-03-10 Panasonic Corporation Lamp filament
USD597688S1 (en) 2007-03-02 2009-08-04 Panasonic Corporation Lamp filament
USD597687S1 (en) 2007-03-02 2009-08-04 Panasonic Corporation Lamp filament

Also Published As

Publication number Publication date
FR824594A (fr) 1938-02-11
GB480511A (en) 1938-02-23
NL47365C (en))

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