GB1283772A - Improvements relating to apparatus for use in image projection - Google Patents

Improvements relating to apparatus for use in image projection

Info

Publication number
GB1283772A
GB1283772A GB434569A GB434569A GB1283772A GB 1283772 A GB1283772 A GB 1283772A GB 434569 A GB434569 A GB 434569A GB 434569 A GB434569 A GB 434569A GB 1283772 A GB1283772 A GB 1283772A
Authority
GB
United Kingdom
Prior art keywords
rods
displace
slide rods
pistons
carriage
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
GB434569A
Inventor
Anthony Edward Holmes
Thomas Ronald Langford
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.)
BRISCO REPROGRAPHIC AND ENGINE
LEYLAND PHOTOCOPYING Ltd
Original Assignee
BRISCO REPROGRAPHIC AND ENGINE
LEYLAND PHOTOCOPYING Ltd
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 BRISCO REPROGRAPHIC AND ENGINE, LEYLAND PHOTOCOPYING Ltd filed Critical BRISCO REPROGRAPHIC AND ENGINE
Priority to GB434569A priority Critical patent/GB1283772A/en
Publication of GB1283772A publication Critical patent/GB1283772A/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
    • G03B21/11—Projectors with built-in or built-on screen for microfilm reading

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

1283772 Optical projection apparatus LEYLAND PHOTOCOPYING Ltd 17 April 1970 [25 Jan 1969] 4345/69 Heading G2A In a projection apparatus for microfilm or other transparencies, the projected image size and focus are controlled by fluid-pressure operable means, a cylinder 13 and pistons 14 acting to displace a carriage 15 bearing projection lens 40 along slide rods 12 for focusing, and interconnected cylinders 1 and 8 with pistons 2 and 9 acting respectively to displace mirror 5 on carriage 3 along slide rods 4, and to displace on rods 11 the yoke 10 bearing the slide rods 12, to vary the size of image projected on to screen 26. Lamp and condenser mounting 1À8 and transparency carrier 17 are fixed on rods 12, cooling air being provided by fan 24. Sensitive paper may be located over screen 26 against stop 28.
GB434569A 1969-01-25 1969-01-25 Improvements relating to apparatus for use in image projection Expired GB1283772A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB434569A GB1283772A (en) 1969-01-25 1969-01-25 Improvements relating to apparatus for use in image projection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB434569A GB1283772A (en) 1969-01-25 1969-01-25 Improvements relating to apparatus for use in image projection

Publications (1)

Publication Number Publication Date
GB1283772A true GB1283772A (en) 1972-08-02

Family

ID=9775429

Family Applications (1)

Application Number Title Priority Date Filing Date
GB434569A Expired GB1283772A (en) 1969-01-25 1969-01-25 Improvements relating to apparatus for use in image projection

Country Status (1)

Country Link
GB (1) GB1283772A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees