GB1257986A - - Google Patents

Info

Publication number
GB1257986A
GB1257986A GB1257986DA GB1257986A GB 1257986 A GB1257986 A GB 1257986A GB 1257986D A GB1257986D A GB 1257986DA GB 1257986 A GB1257986 A GB 1257986A
Authority
GB
United Kingdom
Prior art keywords
reflector
segments
light
image
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
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 filed Critical
Publication of GB1257986A publication Critical patent/GB1257986A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures

Abstract

1,257,986. Reflectors. GRIMES MFG. CO. 28 April, 1969 [29 April, 1968], No. 21639/69. Heading F4R. In a projector lamp comprising a bulb and an image inverting reflector for directing light on to a surface in a predetermined pattern the reflector 35 is divided into a plurality of arcuate discrete segments of a circularly symmetrical reflector wherein each of these segments is angularly offset with respect to a central axis of the reflector to displace the light so that the areas of light contributed by each reflector segment on the surface overlie to form a composite pattern 30 with straight sides, the number of sides depending upon the number of reflector segments. The pattern shape is retained at points beyond the image inversion point farther from that at which it is formed. The reflector segments may be segments of a paraboloid, or an ellipsoid, and the light source is positioned at an off-focus position to produce the image-inversion. The lamp may be formed as a sealed beam lamp, Fig. 11, not shown. In a further embodiment the reflector may have its sides lopped off to form a square shape, in which case the composite pattern may form a rectangular area of light. By variation of the amount and degree of area overlap lamps may be constructed for various purposes such as spotlights, car headlights, aircraft lights &c. Reflectors of the type described may also be used for ultra-violet, infra-red or very short wave radio waves.
GB1257986D 1968-04-29 1969-04-28 Expired GB1257986A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72468868A 1968-04-29 1968-04-29

Publications (1)

Publication Number Publication Date
GB1257986A true GB1257986A (en) 1971-12-22

Family

ID=24911463

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1257986D Expired GB1257986A (en) 1968-04-29 1969-04-28

Country Status (3)

Country Link
US (1) US3588493A (en)
FR (1) FR2007195A1 (en)
GB (1) GB1257986A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995027869A1 (en) * 1994-04-08 1995-10-19 Philips Electronics N.V. Electric lamp with reflector

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3827782A (en) * 1972-12-11 1974-08-06 Eprod Inc Reflector apparatus
US4037341A (en) * 1973-08-13 1977-07-26 Johns-Manville Corporation Luminaire for lighting a sign and method
US4035631A (en) * 1975-12-15 1977-07-12 General Electric Company Projector lamp reflector
US4303971A (en) * 1979-10-29 1981-12-01 General Electric Company Luminaire
FR2494813A1 (en) * 1980-11-21 1982-05-28 Faure Jean Bulb mounting for street lamp - includes reflective plate held on three-point shock resistant support with mirror finish support plate
DE3638669A1 (en) * 1986-11-12 1988-05-26 Auer Sog Glaswerke Gmbh REFLECTOR FOR DENTAL AND SURGICAL OPERATING LIGHTS
ATE162921T1 (en) * 1990-05-08 1998-02-15 Canon Kk POLARIZATION CONVERSION APPARATUS
JPH05264904A (en) * 1992-03-18 1993-10-15 Canon Inc Illuminating optical system and projection type image display device using the system
US5823662A (en) * 1994-08-25 1998-10-20 Lightware, Inc. High efficiency illumination system
DE102016011054A1 (en) 2016-09-12 2018-03-15 Bartenbach Holding Gmbh Luminaire set and spotlights for this

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995027869A1 (en) * 1994-04-08 1995-10-19 Philips Electronics N.V. Electric lamp with reflector

Also Published As

Publication number Publication date
FR2007195A1 (en) 1970-01-02
US3588493A (en) 1971-06-28

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee