GB163328A - Improvements in or relating to means for projecting images of objects on to screens or the like - Google Patents

Improvements in or relating to means for projecting images of objects on to screens or the like

Info

Publication number
GB163328A
GB163328A GB13862/21A GB1386221A GB163328A GB 163328 A GB163328 A GB 163328A GB 13862/21 A GB13862/21 A GB 13862/21A GB 1386221 A GB1386221 A GB 1386221A GB 163328 A GB163328 A GB 163328A
Authority
GB
United Kingdom
Prior art keywords
lamp
screens
relating
objects
projecting images
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
GB13862/21A
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
Publication of GB163328A publication Critical patent/GB163328A/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
    • G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action
    • 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
    • G03B21/08—Projectors or projection-type viewers; Accessories therefor affording epidiascopic projection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Projection Apparatus (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

163,328. Dussaud, C. F. May 17, 1920, [Convention date]. Electric-lamp lanterns and casings; lanterns, regulating air supply to.- A lamp b for optical projection is mounted in a casing a fitted with a chimney e and with a sliding plate f for adjusting admission of air. A second sliding plate h carries the reflector j and a sleeve k fitted with set-screws to engage an annular groove in the lamp socket i, which is thus readily removable from the sleeve for access to the terminal connections.
GB13862/21A 1920-05-17 1921-05-17 Improvements in or relating to means for projecting images of objects on to screens or the like Expired GB163328A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR163328X 1920-05-17

Publications (1)

Publication Number Publication Date
GB163328A true GB163328A (en) 1922-08-17

Family

ID=8876769

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13862/21A Expired GB163328A (en) 1920-05-17 1921-05-17 Improvements in or relating to means for projecting images of objects on to screens or the like

Country Status (1)

Country Link
GB (1) GB163328A (en)

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