GB1184704A - Improvements in or relating to Combinations of a Projection Lamp and Elliptical Condenser Mirror and to Projection Lamps for use in such combinations - Google Patents

Improvements in or relating to Combinations of a Projection Lamp and Elliptical Condenser Mirror and to Projection Lamps for use in such combinations

Info

Publication number
GB1184704A
GB1184704A GB25267/67A GB2526767A GB1184704A GB 1184704 A GB1184704 A GB 1184704A GB 25267/67 A GB25267/67 A GB 25267/67A GB 2526767 A GB2526767 A GB 2526767A GB 1184704 A GB1184704 A GB 1184704A
Authority
GB
United Kingdom
Prior art keywords
combinations
projection
bulb
mirror
screen
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
GB25267/67A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1184704A publication Critical patent/GB1184704A/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

1,184,704. Electric incandescent lamps. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 1 June, 1967 [4 June, 1966], No. 25267/67. Heading H1F. 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.
GB25267/67A 1966-06-04 1967-06-01 Improvements in or relating to Combinations of a Projection Lamp and Elliptical Condenser Mirror and to Projection Lamps for use in such combinations Expired GB1184704A (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
GB1184704A true GB1184704A (en) 1970-03-18

Family

ID=19796796

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25267/67A Expired GB1184704A (en) 1966-06-04 1967-06-01 Improvements in or relating to Combinations of a Projection Lamp and Elliptical Condenser Mirror and to Projection Lamps for use in such combinations

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
US20060186816A1 (en) * 2003-07-28 2006-08-24 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
ES341298A1 (en) 1968-10-16
NL6607798A (en) 1967-12-05
DE1572759A1 (en) 1970-02-12
US3458746A (en) 1969-07-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees