DE3425323A1 - Overhead-projektor - Google Patents
Overhead-projektorInfo
- Publication number
- DE3425323A1 DE3425323A1 DE19843425323 DE3425323A DE3425323A1 DE 3425323 A1 DE3425323 A1 DE 3425323A1 DE 19843425323 DE19843425323 DE 19843425323 DE 3425323 A DE3425323 A DE 3425323A DE 3425323 A1 DE3425323 A1 DE 3425323A1
- Authority
- DE
- Germany
- Prior art keywords
- support arm
- supports
- box
- lens
- unit
- 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.)
- Granted
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
- G03B21/16—Cooling; Preventing overheating
-
- 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)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843425323 DE3425323A1 (de) | 1984-07-10 | 1984-07-10 | Overhead-projektor |
DE19843448372 DE3448372C2 (en) | 1984-07-10 | 1984-07-10 | Overhead projector with slide facility |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843425323 DE3425323A1 (de) | 1984-07-10 | 1984-07-10 | Overhead-projektor |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3425323A1 true DE3425323A1 (de) | 1986-01-16 |
DE3425323C2 DE3425323C2 (de) | 1990-11-08 |
Family
ID=6240245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19843425323 Granted DE3425323A1 (de) | 1984-07-10 | 1984-07-10 | Overhead-projektor |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3425323A1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3618992A1 (de) * | 1986-06-05 | 1987-12-10 | Demolux | Overhead-projektor |
DE3622472A1 (de) * | 1986-07-04 | 1988-01-14 | Demolux | Overhead-projektor |
EP0258858A2 (de) * | 1986-09-02 | 1988-03-09 | Grunwald Projektoren Ag | Overhead-Projektor |
DE3710628A1 (de) * | 1987-03-31 | 1988-10-20 | Demolux | Overhead-projektor |
WO1991000546A1 (en) * | 1987-12-30 | 1991-01-10 | Educatek Oy | Overhead projector |
DE4342044B4 (de) * | 1993-12-09 | 2006-08-31 | Mahle Gmbh | Kolben für einen Verbrennungsmotor |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1572538A1 (de) * | 1967-04-05 | 1970-04-23 | Lehr Und Lernmittel Schuleinri | Lichtschreibprojektor zum Zwecke des Projizierens von beschriebenen oder bedruckten Folien |
DE7209519U (de) * | 1972-03-13 | 1972-06-08 | Schidlowski & Co Ges Mbh | Overheadprojektor |
DE8231878U1 (de) * | 1982-11-12 | 1983-08-25 | Demolux Gmbh & Co Kg, 6070 Langen | Stehbildwerfer |
-
1984
- 1984-07-10 DE DE19843425323 patent/DE3425323A1/de active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1572538A1 (de) * | 1967-04-05 | 1970-04-23 | Lehr Und Lernmittel Schuleinri | Lichtschreibprojektor zum Zwecke des Projizierens von beschriebenen oder bedruckten Folien |
DE7209519U (de) * | 1972-03-13 | 1972-06-08 | Schidlowski & Co Ges Mbh | Overheadprojektor |
DE8231878U1 (de) * | 1982-11-12 | 1983-08-25 | Demolux Gmbh & Co Kg, 6070 Langen | Stehbildwerfer |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3618992A1 (de) * | 1986-06-05 | 1987-12-10 | Demolux | Overhead-projektor |
DE3622472A1 (de) * | 1986-07-04 | 1988-01-14 | Demolux | Overhead-projektor |
EP0258858A2 (de) * | 1986-09-02 | 1988-03-09 | Grunwald Projektoren Ag | Overhead-Projektor |
EP0258858A3 (en) * | 1986-09-02 | 1988-08-24 | Demolux Gmbh & Co.Kg. | Overhead projector |
DE3710628A1 (de) * | 1987-03-31 | 1988-10-20 | Demolux | Overhead-projektor |
WO1991000546A1 (en) * | 1987-12-30 | 1991-01-10 | Educatek Oy | Overhead projector |
US5214459A (en) * | 1987-12-30 | 1993-05-25 | Educatek Oy | Overhead projectors |
DE4342044B4 (de) * | 1993-12-09 | 2006-08-31 | Mahle Gmbh | Kolben für einen Verbrennungsmotor |
Also Published As
Publication number | Publication date |
---|---|
DE3425323C2 (de) | 1990-11-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8172 | Supplementary division/partition in: |
Ref country code: DE Ref document number: 3448372 Format of ref document f/p: P |
|
Q171 | Divided out to: |
Ref country code: DE Ref document number: 3448372 |
|
AH | Division in |
Ref country code: DE Ref document number: 3448372 Format of ref document f/p: P |
|
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
AH | Division in |
Ref country code: DE Ref document number: 3448372 Format of ref document f/p: P |
|
8327 | Change in the person/name/address of the patent owner |
Owner name: GRUNWALD PROJEKTOREN AG, RUGGELL, LI |
|
8328 | Change in the person/name/address of the agent |
Free format text: JUNIUS, W., DIPL.-PHYS. DR., PAT.-ANW., 30519 HANNOVER |
|
8339 | Ceased/non-payment of the annual fee |