GB686746A - New or improved lighting apparatus - Google Patents

New or improved lighting apparatus

Info

Publication number
GB686746A
GB686746A GB33671/48A GB3367148A GB686746A GB 686746 A GB686746 A GB 686746A GB 33671/48 A GB33671/48 A GB 33671/48A GB 3367148 A GB3367148 A GB 3367148A GB 686746 A GB686746 A GB 686746A
Authority
GB
United Kingdom
Prior art keywords
reflectors
beams
lamps
light
reflected
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
GB33671/48A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB33671/48A priority Critical patent/GB686746A/en
Publication of GB686746A publication Critical patent/GB686746A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00—Lighting devices or systems producing a varying lighting effect
    • F21S10/02—Lighting devices or systems producing a varying lighting effect changing colors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

686,746. Lighting apparatus. WILLIAMS, R. G. Dec. 31, 1949 [Dec. 31, 1948; Dec. 5, 1949], Nos. 33671/48 and 31169/49. Classes 75(ii) and 75(iv) A lighting apparatus particularly for blending light beams of different colours into a single beam comprises at least two opposed truncated conical or pyramidal reflectors 4, 5, Fig. 4, disposed with larger ends remote from each other and so arranged that a portion, e.g. the beam B2, of the light from each of a plurality of lamps, e.g. four lamps R, B, W (not shown), and G (not shown), is reflected from the reflector 4, on to the reflector 5 to be reflected by the latter, while the remainder of the said light, e.g. B1, is transmitted independently of the reflectors 4, 5, so that the several emitted reflected and unreflected portions of all the beams are scrambled but parallel. The lamps R, G, B are provided with red, green, and blue colour filters 3, respectively, so that the final beam comprises intermingled parallel beams of red, green, blue and white light. The reflectors 4, 5 may be symmetical or asymmetrical, and the surfaces thereof may be ribbed, fluted, indented or irregular; and one of the reflectors 4, 5 may be conical and the other pyramidal. To avoid intermingling of the beams R1, B1 undeflected by the reflectors 4, 5, co-axial stepped semi-cylindrical louvres 6 may be provided. In an alternative construction the lamps are provided with parabolic or similar reflectors for projecting parallel beams and are so arranged that the light not reflected by the reflectors 4, 5 passes either outside or both outside and inside the latter. In a further alternative construction shown in Fig. 8, a small reflector 4d is associated with a larger reflector 5d and the unreflected portion B1, R1, &c. of each beam passes between the reflectors. By locating the lamps B, R. &c., closely together the unrenected beams may pass also interiorly of the reflectors. In all constructions the reflecting members may be of transluscent material with internal reflecting surfaces. Reference has been directed by the Comptroller to Specification, 646,642.
GB33671/48A 1948-12-31 1948-12-31 New or improved lighting apparatus Expired GB686746A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB33671/48A GB686746A (en) 1948-12-31 1948-12-31 New or improved lighting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33671/48A GB686746A (en) 1948-12-31 1948-12-31 New or improved lighting apparatus

Publications (1)

Publication Number Publication Date
GB686746A true GB686746A (en) 1953-01-28

Family

ID=10355919

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33671/48A Expired GB686746A (en) 1948-12-31 1948-12-31 New or improved lighting apparatus

Country Status (1)

Country Link
GB (1) GB686746A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039966B (en) * 1954-11-27 1958-10-02 Siemens Ag Underwater spotlights
US7659674B2 (en) 1997-08-26 2010-02-09 Philips Solid-State Lighting Solutions, Inc. Wireless lighting control methods and apparatus
US7959320B2 (en) 1999-11-18 2011-06-14 Philips Solid-State Lighting Solutions, Inc. Methods and apparatus for generating and modulating white light illumination conditions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039966B (en) * 1954-11-27 1958-10-02 Siemens Ag Underwater spotlights
US7659674B2 (en) 1997-08-26 2010-02-09 Philips Solid-State Lighting Solutions, Inc. Wireless lighting control methods and apparatus
US7959320B2 (en) 1999-11-18 2011-06-14 Philips Solid-State Lighting Solutions, Inc. Methods and apparatus for generating and modulating white light illumination conditions

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