GB1431542A - Film feeding attachment for use with an overhead projector - Google Patents
Film feeding attachment for use with an overhead projectorInfo
- Publication number
- GB1431542A GB1431542A GB1680472A GB1680472A GB1431542A GB 1431542 A GB1431542 A GB 1431542A GB 1680472 A GB1680472 A GB 1680472A GB 1680472 A GB1680472 A GB 1680472A GB 1431542 A GB1431542 A GB 1431542A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frame
- feeding attachment
- overhead projector
- motor
- film feeding
- 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
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)
Abstract
1431542 Overhead projectors J H GRAEME 10 July 1973 [12 April 1972] 16804/72 Heading G2J A film-feeding attachment for an overhead projector comprises a frame 11, 12, 13 having at each end a detachable motor-driven roller 20. The frame has rubber suction feet 24 so that it can be mounted on the screen of the projector (26,) Fig. 2 (not shown). One or both rollers may be spring- urged into contact with a reversible motor 15 mounted in a casing 14 at one side of the frame, the motor having a remote control arrangement 18. The film may be arranged as a carrier with open lateral seams, so that detachable sheets can be mounted therein Fig. 3 (not shown).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1680472A GB1431542A (en) | 1972-04-12 | 1972-04-12 | Film feeding attachment for use with an overhead projector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1680472A GB1431542A (en) | 1972-04-12 | 1972-04-12 | Film feeding attachment for use with an overhead projector |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1431542A true GB1431542A (en) | 1976-04-07 |
Family
ID=10083964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1680472A Expired GB1431542A (en) | 1972-04-12 | 1972-04-12 | Film feeding attachment for use with an overhead projector |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1431542A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2557986A1 (en) * | 1984-01-09 | 1985-07-12 | Lallier Eric | Automatic film handler for back projector with timer |
WO1985004264A1 (en) * | 1984-03-14 | 1985-09-26 | Retest Materials Pty. Limited | An overhead transparency preparation apparatus |
DE3506968A1 (en) * | 1984-04-13 | 1985-10-17 | Demolux Gmbh & Co Kg, 6070 Langen | Overhead projector |
DE3413995A1 (en) * | 1984-04-13 | 1985-10-17 | Demolux Gmbh & Co Kg, 6070 Langen | Overhead projector |
GB2209611A (en) * | 1987-06-19 | 1989-05-17 | British Aerospace | Remotely controlled optical test equipment |
US4942411A (en) * | 1988-06-27 | 1990-07-17 | Polston Steve A | Automatic overlay feed apparatus for an overhead projector |
US4944586A (en) * | 1989-11-30 | 1990-07-31 | E. I. Du Pont De Nemours And Company | Automated transparency organizer |
US5214459A (en) * | 1987-12-30 | 1993-05-25 | Educatek Oy | Overhead projectors |
GB2266784A (en) * | 1992-05-09 | 1993-11-10 | David Bothamley | An automatic delivery system for overhead projectors |
WO1995022784A1 (en) * | 1994-02-22 | 1995-08-24 | Blake George B | Overhead projector presentation system |
-
1972
- 1972-04-12 GB GB1680472A patent/GB1431542A/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2557986A1 (en) * | 1984-01-09 | 1985-07-12 | Lallier Eric | Automatic film handler for back projector with timer |
WO1985004264A1 (en) * | 1984-03-14 | 1985-09-26 | Retest Materials Pty. Limited | An overhead transparency preparation apparatus |
DE3506968A1 (en) * | 1984-04-13 | 1985-10-17 | Demolux Gmbh & Co Kg, 6070 Langen | Overhead projector |
DE3413995A1 (en) * | 1984-04-13 | 1985-10-17 | Demolux Gmbh & Co Kg, 6070 Langen | Overhead projector |
GB2209611A (en) * | 1987-06-19 | 1989-05-17 | British Aerospace | Remotely controlled optical test equipment |
US5214459A (en) * | 1987-12-30 | 1993-05-25 | Educatek Oy | Overhead projectors |
US4942411A (en) * | 1988-06-27 | 1990-07-17 | Polston Steve A | Automatic overlay feed apparatus for an overhead projector |
US4944586A (en) * | 1989-11-30 | 1990-07-31 | E. I. Du Pont De Nemours And Company | Automated transparency organizer |
GB2266784A (en) * | 1992-05-09 | 1993-11-10 | David Bothamley | An automatic delivery system for overhead projectors |
WO1995022784A1 (en) * | 1994-02-22 | 1995-08-24 | Blake George B | Overhead projector presentation system |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |