GB1277546A - Overhead projector - Google Patents

Overhead projector

Info

Publication number
GB1277546A
GB1277546A GB2553570A GB2553570A GB1277546A GB 1277546 A GB1277546 A GB 1277546A GB 2553570 A GB2553570 A GB 2553570A GB 2553570 A GB2553570 A GB 2553570A GB 1277546 A GB1277546 A GB 1277546A
Authority
GB
United Kingdom
Prior art keywords
projector
overhead projector
housing
writing
socket
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
GB2553570A
Inventor
Gerhard Ritzerfeld
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 GB1277546A publication Critical patent/GB1277546A/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

Landscapes

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

Abstract

1277546 Overhead projectors G RITZERFELD 27 May 1970 [3 March 1970] 25535/70 Heading G2A A writing projector comprises a housing 1 on which a Fresnel lens 20 beneath a transparent writing plate 4 are mounted, the housing containing light source 3 and being recessed inwardly on its front side wall to provide accommodation for accessories of the projector such as a reeling device 11 for cable 12, electrical socket 8 and a dummy, storage socket 13.
GB2553570A 1970-03-03 1970-05-27 Overhead projector Expired GB1277546A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19707008306 DE7008306U (en) 1970-03-03 1970-03-03 WRITING PROJECTOR

Publications (1)

Publication Number Publication Date
GB1277546A true GB1277546A (en) 1972-06-14

Family

ID=6609970

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2553570A Expired GB1277546A (en) 1970-03-03 1970-05-27 Overhead projector

Country Status (2)

Country Link
DE (1) DE7008306U (en)
GB (1) GB1277546A (en)

Also Published As

Publication number Publication date
DE7008306U (en) 1970-07-16

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