GB333141A - Improvements in or relating to projection apparatus - Google Patents

Improvements in or relating to projection apparatus

Info

Publication number
GB333141A
GB333141A GB4614/30A GB461430A GB333141A GB 333141 A GB333141 A GB 333141A GB 4614/30 A GB4614/30 A GB 4614/30A GB 461430 A GB461430 A GB 461430A GB 333141 A GB333141 A GB 333141A
Authority
GB
United Kingdom
Prior art keywords
projection apparatus
incision
relating
lamp
reflector
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
GB4614/30A
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 GB333141A publication Critical patent/GB333141A/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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/04—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages the fastening being onto or by the light source
    • 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
    • F21S8/003—Searchlights, i.e. outdoor lighting device producing powerful beam of parallel rays, e.g. for military or attraction purposes

Landscapes

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

Abstract

333,141. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. Feb. 20, 1929, [Convention date]. Mounting electric lamps in lanterns.-Projection apparatus, more particularly adapted for use as a searchlight, comprises an incandescent electric lamp 2 of the type having a condensation space 4 of which the end containing the filament 3 projects through a lateral aperture 5 or an incision 6 in a relatively movable reflector 1. The incision 6 may be fitted with a cover member. In a modification the lamp is wholly within the reflector.
GB4614/30A 1929-02-20 1930-02-11 Improvements in or relating to projection apparatus Expired GB333141A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL333141X 1929-02-20

Publications (1)

Publication Number Publication Date
GB333141A true GB333141A (en) 1930-08-07

Family

ID=19784437

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4614/30A Expired GB333141A (en) 1929-02-20 1930-02-11 Improvements in or relating to projection apparatus

Country Status (1)

Country Link
GB (1) GB333141A (en)

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