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FR2441866A1 - Portable projector for transparencies - has battery operated lamp, film support slot and lenses housed in cylindrical telescopic hand-held casing - Google Patents

Portable projector for transparencies - has battery operated lamp, film support slot and lenses housed in cylindrical telescopic hand-held casing

Info

Publication number
FR2441866A1
FR2441866A1 FR7832129A FR7832129A FR2441866A1 FR 2441866 A1 FR2441866 A1 FR 2441866A1 FR 7832129 A FR7832129 A FR 7832129A FR 7832129 A FR7832129 A FR 7832129A FR 2441866 A1 FR2441866 A1 FR 2441866A1
Authority
FR
France
Prior art keywords
cylinder
transparencies
batteries
lamp
film support
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.)
Withdrawn
Application number
FR7832129A
Other languages
French (fr)
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 FR7832129A priority Critical patent/FR2441866A1/en
Publication of FR2441866A1 publication Critical patent/FR2441866A1/en
Withdrawn legal-status Critical Current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
    • G03B21/14—Details
    • G03B21/26—Projecting separately subsidiary matter simultaneously with main image
    • 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)

Abstract

The projector for transparencies includes two hollow cylindrical parts (A, B). The first part (A) houses four electric batteries (10) connected in series. These are held in place by internal ribs (11) formed integrally with the housing. To allow the batteries to be inserted, this part of the housing is made as two half shells (12, 13) held together by spring clips. The lower shell (12) also supports a lamp bulb (15) fitted into a screw socket (16). Wires (17) connect the lamp to the batteries via a switch (18) mounted in the upper surface of the cylinder. A reflector (21) separates the lamp from the batteries. At one end of the lower shell (12) are two plano-convex lenses (22) with their convex surfaces facing each other. The first cylinder (A) ends with two longitudinal ribs (23), defining a slot into which the transparency may be inserted. The second cylinder (8) has an internal dia. slightly greater than that of the first cylinder so that it may slide over it. This part houses a biconvex lens projecting an image of the transparency on to a distant screen.
FR7832129A 1978-11-14 1978-11-14 Portable projector for transparencies - has battery operated lamp, film support slot and lenses housed in cylindrical telescopic hand-held casing Withdrawn FR2441866A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7832129A FR2441866A1 (en) 1978-11-14 1978-11-14 Portable projector for transparencies - has battery operated lamp, film support slot and lenses housed in cylindrical telescopic hand-held casing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7832129A FR2441866A1 (en) 1978-11-14 1978-11-14 Portable projector for transparencies - has battery operated lamp, film support slot and lenses housed in cylindrical telescopic hand-held casing

Publications (1)

Publication Number Publication Date
FR2441866A1 true FR2441866A1 (en) 1980-06-13

Family

ID=9214857

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7832129A Withdrawn FR2441866A1 (en) 1978-11-14 1978-11-14 Portable projector for transparencies - has battery operated lamp, film support slot and lenses housed in cylindrical telescopic hand-held casing

Country Status (1)

Country Link
FR (1) FR2441866A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5170196A (en) * 1990-12-03 1992-12-08 Sony Corporation Portable projector

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE236217C (en) *
GB227502A (en) * 1923-10-12 1925-01-12 Stuart Cooper Improvements in or relating to optical projection and cinematograph apparatus
US2357542A (en) * 1943-03-25 1944-09-05 Melvin P Pfeil Optical projection pointer
US2717530A (en) * 1952-07-09 1955-09-13 Leta S Taylor Projected optical image pointer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE236217C (en) *
GB227502A (en) * 1923-10-12 1925-01-12 Stuart Cooper Improvements in or relating to optical projection and cinematograph apparatus
US2357542A (en) * 1943-03-25 1944-09-05 Melvin P Pfeil Optical projection pointer
US2717530A (en) * 1952-07-09 1955-09-13 Leta S Taylor Projected optical image pointer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5170196A (en) * 1990-12-03 1992-12-08 Sony Corporation Portable projector

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Legal Events

Date Code Title Description
ST Notification of lapse