GB1429992A - Optical projecting apparatus - Google Patents

Optical projecting apparatus

Info

Publication number
GB1429992A
GB1429992A GB1937173A GB1937173A GB1429992A GB 1429992 A GB1429992 A GB 1429992A GB 1937173 A GB1937173 A GB 1937173A GB 1937173 A GB1937173 A GB 1937173A GB 1429992 A GB1429992 A GB 1429992A
Authority
GB
United Kingdom
Prior art keywords
projector
movable
light source
shaft
diascopic
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
GB1937173A
Other languages
English (en)
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.)
Lindaco Ltd
Original Assignee
Lindaco 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 Lindaco Ltd filed Critical Lindaco Ltd
Publication of GB1429992A publication Critical patent/GB1429992A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Overhead Projectors And Projection Screens (AREA)
GB1937173A 1972-04-26 1973-04-24 Optical projecting apparatus Expired GB1429992A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE552172A SE363906B (enExample) 1972-04-26 1972-04-26

Publications (1)

Publication Number Publication Date
GB1429992A true GB1429992A (en) 1976-03-31

Family

ID=20266665

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1937173A Expired GB1429992A (en) 1972-04-26 1973-04-24 Optical projecting apparatus

Country Status (6)

Country Link
JP (1) JPS4967625A (enExample)
DE (1) DE2321219A1 (enExample)
FR (1) FR2187135A5 (enExample)
GB (1) GB1429992A (enExample)
IT (1) IT984143B (enExample)
SE (1) SE363906B (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5453530A (en) * 1977-10-05 1979-04-26 Tetsuo Nomoto Overhead projector
JPS5867325U (ja) * 1981-10-30 1983-05-07 株式会社ミツトヨ 投影機

Also Published As

Publication number Publication date
DE2321219A1 (de) 1973-11-08
JPS4967625A (enExample) 1974-07-01
FR2187135A5 (enExample) 1974-01-11
SE363906B (enExample) 1974-02-04
IT984143B (it) 1974-11-20

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee