GB166304A - Improvements in or relating to optical projection apparatus - Google Patents

Improvements in or relating to optical projection apparatus

Info

Publication number
GB166304A
GB166304A GB552320A GB552320A GB166304A GB 166304 A GB166304 A GB 166304A GB 552320 A GB552320 A GB 552320A GB 552320 A GB552320 A GB 552320A GB 166304 A GB166304 A GB 166304A
Authority
GB
United Kingdom
Prior art keywords
relating
projection apparatus
optical projection
optical
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
GB552320A
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 GB552320A priority Critical patent/GB166304A/en
Publication of GB166304A publication Critical patent/GB166304A/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
    • G03B21/54—Accessories
    • G03B21/64—Means for mounting individual pictures to be projected, e.g. frame for transparency

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
GB552320A 1920-11-23 1920-11-23 Improvements in or relating to optical projection apparatus Expired GB166304A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB552320A GB166304A (en) 1920-11-23 1920-11-23 Improvements in or relating to optical projection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB552320A GB166304A (en) 1920-11-23 1920-11-23 Improvements in or relating to optical projection apparatus

Publications (1)

Publication Number Publication Date
GB166304A true GB166304A (en) 1921-07-21

Family

ID=9797783

Family Applications (1)

Application Number Title Priority Date Filing Date
GB552320A Expired GB166304A (en) 1920-11-23 1920-11-23 Improvements in or relating to optical projection apparatus

Country Status (1)

Country Link
GB (1) GB166304A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2521506A (en) * 1948-02-03 1950-09-05 Charles F Dutton Transparency holder for projection lanterns

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2521506A (en) * 1948-02-03 1950-09-05 Charles F Dutton Transparency holder for projection lanterns

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