NO741871L - - Google Patents

Info

Publication number
NO741871L
NO741871L NO741871A NO741871A NO741871L NO 741871 L NO741871 L NO 741871L NO 741871 A NO741871 A NO 741871A NO 741871 A NO741871 A NO 741871A NO 741871 L NO741871 L NO 741871L
Authority
NO
Norway
Prior art keywords
projection
light sources
lamp
lamp housing
holder
Prior art date
Application number
NO741871A
Other languages
English (en)
Norwegian (no)
Inventor
Gerhard Ritzerfeld
Original Assignee
Gerhard Ritzerfeld
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 Gerhard Ritzerfeld filed Critical Gerhard Ritzerfeld
Publication of NO741871L publication Critical patent/NO741871L/no

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
    • 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
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
NO741871A 1973-06-23 1974-05-22 NO741871L (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19737323841U DE7323841U (de) 1973-06-23 1973-06-23 Tageslicht-projektionsgeraet

Publications (1)

Publication Number Publication Date
NO741871L true NO741871L (enrdf_load_stackoverflow) 1975-01-20

Family

ID=6639341

Family Applications (1)

Application Number Title Priority Date Filing Date
NO741871A NO741871L (enrdf_load_stackoverflow) 1973-06-23 1974-05-22

Country Status (7)

Country Link
BE (1) BE814924A (enrdf_load_stackoverflow)
CH (1) CH566020A5 (enrdf_load_stackoverflow)
DE (1) DE7323841U (enrdf_load_stackoverflow)
DK (1) DK333674A (enrdf_load_stackoverflow)
FR (1) FR2234828A5 (enrdf_load_stackoverflow)
GB (1) GB1421095A (enrdf_load_stackoverflow)
NO (1) NO741871L (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7628047U1 (de) * 1976-09-08 1976-12-30 Rollei-Werke Franke & Heidecke, 3300 Braunschweig Stehbildprojektor
US5301094A (en) * 1993-03-17 1994-04-05 Minnesota Mining And Manufacturing Company Lamp changing assembly for overhead projector

Also Published As

Publication number Publication date
FR2234828A5 (enrdf_load_stackoverflow) 1975-01-17
DK333674A (enrdf_load_stackoverflow) 1975-02-10
BE814924A (fr) 1974-09-02
CH566020A5 (enrdf_load_stackoverflow) 1975-08-29
GB1421095A (en) 1976-01-14
DE7323841U (de) 1973-11-22

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