ES341298A1 - Projection lamp with a wire screen for blackening prevention - Google Patents

Projection lamp with a wire screen for blackening prevention

Info

Publication number
ES341298A1
ES341298A1 ES341298A ES341298A ES341298A1 ES 341298 A1 ES341298 A1 ES 341298A1 ES 341298 A ES341298 A ES 341298A ES 341298 A ES341298 A ES 341298A ES 341298 A1 ES341298 A1 ES 341298A1
Authority
ES
Spain
Prior art keywords
screen
bulb
mirror
wire screen
projection 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
Application number
ES341298A
Other languages
Spanish (es)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES341298A1 publication Critical patent/ES341298A1/en
Expired legal-status Critical Current

Links

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
    • H01K7/00—Lamps for purposes other than general lighting
    • H01K7/02—Lamps for purposes other than general lighting for producing a narrow beam of light; for approximating a point-like source of light, e.g. for searchlight, for cinematographic projector

Landscapes

  • Optical Elements Other Than Lenses (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A projector lamp is combined with an elliptical mirror and has a filament 6 arranged at the focus of the mirror and surrounded by a wire screen 11. The mirror may be outside or inside the lamp or, as shown, may take the form of a cold-light coating 15 on an ellipsoidal portion 3-4-3 of the bulb 2. The opposite side of the bulb may be of spherical form and have a reflective coating with a window 5-5. The screen, which prevents blackening of the bulb, consists of a plurality of wire loops 12 attached to a pair of stay wires 13 and is supported, through insulating glass beads 14, by the leadin wires 8. The filament 6 is in the form of a flattened coil which is less than 5 mm. from the screen.
ES341298A 1966-06-04 1967-06-02 Projection lamp with a wire screen for blackening prevention Expired ES341298A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6607798A NL6607798A (en) 1966-06-04 1966-06-04

Publications (1)

Publication Number Publication Date
ES341298A1 true ES341298A1 (en) 1968-10-16

Family

ID=19796796

Family Applications (1)

Application Number Title Priority Date Filing Date
ES341298A Expired ES341298A1 (en) 1966-06-04 1967-06-02 Projection lamp with a wire screen for blackening prevention

Country Status (5)

Country Link
US (1) US3458746A (en)
DE (1) DE1572759A1 (en)
ES (1) ES341298A1 (en)
GB (1) GB1184704A (en)
NL (1) NL6607798A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT355200B (en) * 1978-01-23 1980-02-25 Espe Pharm Praep RADIATION DEVICE FOR THE CURING OF RADIANT DIMENSIONS
US4297611A (en) * 1979-10-02 1981-10-27 Wagner Electric Corporation Control of tungsten filament erosion in a halogen lamp
EP1652214B1 (en) * 2003-07-28 2007-08-22 Koninklijke Philips Electronics N.V. Electric lamp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA650355A (en) * 1962-10-16 Honing Wilhelm Electric incandescent lamp
BE441281A (en) * 1940-01-19
NL80117C (en) * 1948-02-21
US3025424A (en) * 1958-06-16 1962-03-13 Gen Electric Electric lamp
US3174067A (en) * 1960-07-21 1965-03-16 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Construction for projection lamps eliminating undesired infrared radiation

Also Published As

Publication number Publication date
GB1184704A (en) 1970-03-18
DE1572759A1 (en) 1970-02-12
US3458746A (en) 1969-07-29
NL6607798A (en) 1967-12-05

Similar Documents

Publication Publication Date Title
US3174067A (en) Construction for projection lamps eliminating undesired infrared radiation
US4041344A (en) Ellipsoidal reflector lamp
GB1140417A (en) Variable lamp
US2245793A (en) Multiple filament lamp
US2605440A (en) Incandescent electric lamp
GB1143914A (en) Combined condenser mirror and light source
ES341298A1 (en) Projection lamp with a wire screen for blackening prevention
US1239371A (en) Combined reflector and source of light in the same.
GB1196109A (en) Automobile Headlight
ES289617A1 (en) Electric lamp
US3082345A (en) Electric lamp
US2144400A (en) Reflecting electric lamp
GB884000A (en) An electric projection lamp
US2219510A (en) Reflecting electric lamp
GB1039215A (en) Improvements in and relating to electric incandescent lamps
US2121314A (en) Reflecting electric lamp
GB1017828A (en) Improvements in or relating to electric lamps
US2129676A (en) Radiant energy projector
US1609870A (en) Indirect-lighting fixture
US2894428A (en) Light projecting arrangement for projectors
ES326096A1 (en) A device of electric lamp incandescente for purposes of projection. (Machine-translation by Google Translate, not legally binding)
GB1125226A (en) Improvements in electric incandescent projection lamps
GB1113407A (en) Improvements in electric projection lamps
GB1084778A (en) Shadow-less lamps
GB571242A (en) Incandescent electric projection lamp with rectifier