GB344498A - Improvements in or relating to projection screens and to the projection of images thereon - Google Patents

Improvements in or relating to projection screens and to the projection of images thereon

Info

Publication number
GB344498A
GB344498A GB3725829A GB3725829A GB344498A GB 344498 A GB344498 A GB 344498A GB 3725829 A GB3725829 A GB 3725829A GB 3725829 A GB3725829 A GB 3725829A GB 344498 A GB344498 A GB 344498A
Authority
GB
United Kingdom
Prior art keywords
projection
film
glass
screen
white
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
GB3725829A
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 GB3725829A priority Critical patent/GB344498A/en
Publication of GB344498A publication Critical patent/GB344498A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)

Abstract

344,498. Optical-projection apparatus; projection screens. BLACK, W. G., 40, Leamington Road, Ainsdale, Southport, Lancashire. Dec. 5, 1929, No. 37258. [Class 97 (i).] A film or a piece of glass &c. having a white opal character is provided in a projector so that the light beam passes both through it and through the picture film &c. to produce an improved effect on the projection screen ; the screen may also be made of glass with an aluminium, silver, or other white, backing, or a white opal light may also be thrown on to the screen from a separate lantern. As shown, the projector has an opening 3 for the piece of glass or film, and an opal film 5, fed with the picture film 4, passes through it.
GB3725829A 1929-12-05 1929-12-05 Improvements in or relating to projection screens and to the projection of images thereon Expired GB344498A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3725829A GB344498A (en) 1929-12-05 1929-12-05 Improvements in or relating to projection screens and to the projection of images thereon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3725829A GB344498A (en) 1929-12-05 1929-12-05 Improvements in or relating to projection screens and to the projection of images thereon

Publications (1)

Publication Number Publication Date
GB344498A true GB344498A (en) 1931-03-05

Family

ID=10395021

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3725829A Expired GB344498A (en) 1929-12-05 1929-12-05 Improvements in or relating to projection screens and to the projection of images thereon

Country Status (1)

Country Link
GB (1) GB344498A (en)

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