GB274384A - Improvements relating to the projection of light - Google Patents

Improvements relating to the projection of light

Info

Publication number
GB274384A
GB274384A GB666427A GB666427A GB274384A GB 274384 A GB274384 A GB 274384A GB 666427 A GB666427 A GB 666427A GB 666427 A GB666427 A GB 666427A GB 274384 A GB274384 A GB 274384A
Authority
GB
United Kingdom
Prior art keywords
light
reflectors
foci
coincident
refractor
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
GB666427A
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 GB666427A priority Critical patent/GB274384A/en
Publication of GB274384A publication Critical patent/GB274384A/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

Abstract

274,384. Steele, L. J., and Martin, H. April 16, 1926. Optical-projection apparatus; reflecting systems.-In a projector lamp adapted to produce a substantially parallel beam of light, a relatively small refractor d or refracting system is arranged to intercept forwardly directed rays of light which do not fall on two or more paraboloidal reflectors a, a' having their axes and foci coincident, a source of light b being situated at the coincident foci. The refractor d mav consist of a double convex lens mounted in a light framework held in position by light metal rods adjustably secured to one or both reflectors by nuts. An auxiliary reflector c may be arranged at the rear of the main reflectors so as to reflect all rearwardly directed rays of light back through the light source. Alternatively, one or more separate projecting systems f, Fig. 4, having for example ellipsoidal reflectors, may be arranged to provide converging beams converging to the coincident foci of the main reflectors.
GB666427A 1926-04-16 1926-04-16 Improvements relating to the projection of light Expired GB274384A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB666427A GB274384A (en) 1926-04-16 1926-04-16 Improvements relating to the projection of light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB666427A GB274384A (en) 1926-04-16 1926-04-16 Improvements relating to the projection of light

Publications (1)

Publication Number Publication Date
GB274384A true GB274384A (en) 1927-07-18

Family

ID=9818555

Family Applications (1)

Application Number Title Priority Date Filing Date
GB666427A Expired GB274384A (en) 1926-04-16 1926-04-16 Improvements relating to the projection of light

Country Status (1)

Country Link
GB (1) GB274384A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395272A (en) * 1966-08-15 1968-07-30 Thomas H. Nieholl Apparatus for controlling light rays

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395272A (en) * 1966-08-15 1968-07-30 Thomas H. Nieholl Apparatus for controlling light rays

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