GB191217412A - Improvements relating to Apparatus for Picture Projection, Magnifying and the like. - Google Patents

Improvements relating to Apparatus for Picture Projection, Magnifying and the like.

Info

Publication number
GB191217412A
GB191217412A GB191217412DA GB191217412A GB 191217412 A GB191217412 A GB 191217412A GB 191217412D A GB191217412D A GB 191217412DA GB 191217412 A GB191217412 A GB 191217412A
Authority
GB
United Kingdom
Prior art keywords
bench
optical
magnifying
improvements relating
picture projection
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
Inventor
Theodor Bergmann
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
Application granted granted Critical
Publication of GB191217412A publication Critical patent/GB191217412A/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
    • G03B21/10—Projectors with built-in or built-on screen

Landscapes

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

Abstract

17,412. Bergmann, T. July 26. Optical-projection apparatus. - Consists in mounting the various elements l, e, v, o, &c. of an optical-projection apparatus on an optical bench a of triangular cross - section, on which the legs b supporting the bench are also mounted. The various parts are secured by screws d, h to the bar a so that they can be readily removed or interchanged. Marks f, visible through apertures in the various members, are made on the bench a, and are in alinement with corresponding marks on said members when the latter are in their normal positions. The opening p of the lantern casing l is provided with an iris or like diaphragm.
GB191217412D 1912-07-26 1912-07-26 Improvements relating to Apparatus for Picture Projection, Magnifying and the like. Expired GB191217412A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191217412T 1912-07-26

Publications (1)

Publication Number Publication Date
GB191217412A true GB191217412A (en) 1912-12-19

Family

ID=32642333

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191217412D Expired GB191217412A (en) 1912-07-26 1912-07-26 Improvements relating to Apparatus for Picture Projection, Magnifying and the like.

Country Status (1)

Country Link
GB (1) GB191217412A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3031922A (en) * 1957-08-01 1962-05-01 Stadler George Direct color enlarging apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3031922A (en) * 1957-08-01 1962-05-01 Stadler George Direct color enlarging apparatus

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