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US2188945A - Double-walled electric incandescent lamp - Google Patents

Double-walled electric incandescent lamp Download PDF

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Publication number
US2188945A
US2188945A US250902A US25090239A US2188945A US 2188945 A US2188945 A US 2188945A US 250902 A US250902 A US 250902A US 25090239 A US25090239 A US 25090239A US 2188945 A US2188945 A US 2188945A
Authority
US
United States
Prior art keywords
liquid
bulb
double
incandescent lamp
lamp
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
US250902A
Other languages
English (en)
Inventor
Gomonet Edouard
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.)
Claude Paz et Visseaux SA
Original Assignee
Societe Anonyme pour les Applications de lElectricite et des Gaz Rares Etablissement Claude Paz et Silva
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 Anonyme pour les Applications de lElectricite et des Gaz Rares Etablissement Claude Paz et Silva filed Critical Societe Anonyme pour les Applications de lElectricite et des Gaz Rares Etablissement Claude Paz et Silva
Application granted granted Critical
Publication of US2188945A publication Critical patent/US2188945A/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
    • H01K1/58—Cooling arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/34—Double wall vessels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • a liquid must be used which leaves at first sight appear very suitable owing to its no deposit, for example distilled'water, and a low heat conductivity. In use it has, however, 15 small pump must be provided for ensuring cirbeen found very satisfactory owing to its high culation of this water between the lamp and a .co-eflicient of expansion which results in large cooling device. convection currents thus facilitating boiling in The chief object of the invention is to obtain the upper portion of the liquid.
  • porous substance for initiating the-formation of This object is attained according to the invengas bubbles may be provided near the top of tion by providing between the two walls a liquid the liquid. Further, the convection currents may in which the inner bulb is immersed, and which be assisted by suitably located partitions.
  • Vaseline oil has the further advantage of be- 2.5 the said liquid boiling during the operation of ing sufilciently transparent to infra-red rays.
  • the lamp and the emitted vapours condensing which is very advantageous for lamps'for genupon the part of the outer bulb which is above eral lighting where it is of advantage not to the level of the liquid.
  • retain in the lighting apparatus the heat due When such a lamp is put in operation the iilato the radiated energy. 30 ment transmits heat to the wall of the lntemal 0n the contrary, in certain cases the infra-red bulb which becomes heated and in turn transenergy emitted produces injurious overheating.
  • outer bulb does not become such as to cause it used f correcting the light e itted by the t b r t, 4 filament so as to obtain a whiter light or a col-
  • Use can also be a e of a luminesfrom the surface of the liquid to the walls which cent liquid-
  • the unused y a-V olet) will act as condensers, it is advisable not to leave in e absorbed by h q d and transformed into 50 the outer bulb too high a pressure of non-con- Visible reysdensable gas.
  • t Outer bulb ay be 0 not be created if boiling of the liquid accomshaped and can be of such a. nature as to facilipanied by violent sudden jerks therein are to tate the heat exchange.
  • the upper portion of the outer bulb could be made oi metal.
  • This metal part can carry any known cooling means (fins, tubular shaves, etc.). This cooling can be accelerated by means of a current of air or water circulation.
  • the luminous flux must be directed.
  • the two bulbs can then be so shaped that the liquid between them constitutes the first element or an optical projection system intended to direct the light.
  • the outer bulb can be made detachable so that in case of the filament breaking only the inner bulb need be replaced.
  • FIGS 1, 2 and 3 of the accompanying drawing show diagrammatically and by way of example two embodiments of the invention.
  • Figure 1 represents a xenon-and. nitrogen-filled incandescent lamp bulb having a double coiled tungsten filament.
  • the inner bulb i is immersed in Vaseline oil. After this oil has been placed in the outer bulb E the latter is filled with nitrogen at a pressure of l centimetre of mercury. During working the oil vapours condense upon the wall of the outer bulb E.
  • the fuse i1 is a guard against excessive heating. The fuse is melts on the occurrence of an excess voltage due to arcing.
  • the ring of porous substance P ensures regular boiling in the upper part of the liquid.
  • the lower part of the outer bulb E is of glass up to the line S, and the upper part is of metal.
  • This metal carries the fins L. According to circumstances these fins can be enclosed in the projector so as to give them the benefit of the air current from the fan which is normally provided in many projectors or they can be placed in a region above the normal height of the projector in order to liberate the heat outside the apparatus.
  • a double-walled electric incandescent lamp having a liquid which only partly fills the space between the two walls, the inner bulb being im-.
  • a lamp according toclaim 1 wherein a liquid is used which absorbs the undesired rays.
  • a lamp according to claim 1 wherein the two bulbs are so arranged relatively to each other that the liquid constitutes an optical element for distributing the rays emitted.
  • a lamp according to claim 1 provided with a fuse which is adapted to interrupt the current if the temperature of the liquid becomes too high.

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US250902A 1938-01-28 1939-01-14 Double-walled electric incandescent lamp Expired - Lifetime US2188945A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH512803X 1938-01-28

Publications (1)

Publication Number Publication Date
US2188945A true US2188945A (en) 1940-02-06

Family

ID=4517539

Family Applications (1)

Application Number Title Priority Date Filing Date
US250902A Expired - Lifetime US2188945A (en) 1938-01-28 1939-01-14 Double-walled electric incandescent lamp

Country Status (6)

Country Link
US (1) US2188945A (fr)
CH (1) CH204631A (fr)
DE (1) DE741917C (fr)
FR (1) FR849076A (fr)
GB (1) GB512803A (fr)
NL (1) NL53880C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2534419A2 (fr) * 2010-02-08 2012-12-19 Nilssen, Ole K. Lampe refroidie par évaporation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2534419A2 (fr) * 2010-02-08 2012-12-19 Nilssen, Ole K. Lampe refroidie par évaporation
EP2534419A4 (fr) * 2010-02-08 2013-08-07 Nilssen Ole K Lampe refroidie par évaporation

Also Published As

Publication number Publication date
GB512803A (en) 1939-09-26
FR849076A (fr) 1939-11-14
NL53880C (fr)
CH204631A (fr) 1939-05-15
DE741917C (de) 1943-11-19

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