FR1574433A - - Google Patents

Info

Publication number
FR1574433A
FR1574433A FR1574433DA FR1574433A FR 1574433 A FR1574433 A FR 1574433A FR 1574433D A FR1574433D A FR 1574433DA FR 1574433 A FR1574433 A FR 1574433A
Authority
FR
France
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
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 filed Critical
Application granted granted Critical
Publication of FR1574433A publication Critical patent/FR1574433A/fr
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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S353/00—Optics: image projectors
    • Y10S353/03—Transparent

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Projection Apparatus (AREA)
FR1574433D 1967-07-14 1968-07-15 Expired FR1574433A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65340067A 1967-07-14 1967-07-14

Publications (1)

Publication Number Publication Date
FR1574433A true FR1574433A (fr) 1969-07-11

Family

ID=24620722

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1574433D Expired FR1574433A (fr) 1967-07-14 1968-07-15

Country Status (5)

Country Link
US (1) US3515476A (fr)
DE (1) DE1772868A1 (fr)
ES (1) ES356132A1 (fr)
FR (1) FR1574433A (fr)
GB (1) GB1207012A (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4388679A (en) * 1981-02-23 1983-06-14 Gte Products Corporation Projection lighting unit with glass reflector capable of dual insertion
US4518233A (en) * 1983-01-20 1985-05-21 General Audio-Visual Inc. Automatic lamp changer for modular slide projector
DE3712999A1 (de) * 1987-02-16 1988-08-25 Demolux Overhead-projektor
US5241333A (en) * 1992-10-22 1993-08-31 Minnesota Mining And Manufacturing Company Overhead projector with pivoting lamp changer and color adjustment
US5281986A (en) * 1993-04-02 1994-01-25 Minnesota Mining And Manufacturing Company Latching mechanism for overhead projector post
US7922139B2 (en) 2006-05-05 2011-04-12 Milestone Av Technologies Llc Adjustable projector mount
CA2727821C (fr) 2008-06-12 2016-10-11 Milestone Av Technologies Llc Interface de projecteur universelle avec alignement viable
CN119309121B (zh) * 2024-12-17 2025-04-25 江苏源丰智能科技有限公司 一种投影机用的升降架

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124035A (en) * 1964-03-10 Multi-purpose projection device
US3244069A (en) * 1964-05-12 1966-04-05 Charles Beseler Company Projector with movable light source

Also Published As

Publication number Publication date
DE1772868A1 (de) 1972-02-17
US3515476A (en) 1970-06-02
ES356132A1 (es) 1970-01-01
GB1207012A (en) 1970-09-30

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Legal Events

Date Code Title Description
ST Notification of lapse