DE3425323A1 - Overhead-projektor - Google Patents

Overhead-projektor

Info

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
Application number
DE19843425323
Other languages
English (en)
Other versions
DE3425323C2 (de
Inventor
Peter H Grunwald
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.)
GRUNWALD PROJEKTOREN AG, RUGGELL, LI
Original Assignee
DEMOLUX
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 DEMOLUX filed Critical DEMOLUX
Priority to DE19843425323 priority Critical patent/DE3425323A1/de
Priority to DE19843448372 priority patent/DE3448372C2/de
Publication of DE3425323A1 publication Critical patent/DE3425323A1/de
Application granted granted Critical
Publication of DE3425323C2 publication Critical patent/DE3425323C2/de
Granted 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
    • G03B21/16—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)
  • Projection Apparatus (AREA)
  • Overhead Projectors And Projection Screens (AREA)
DE19843425323 1984-07-10 1984-07-10 Overhead-projektor Granted DE3425323A1 (de)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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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