FR665972A - Improvements to projection lanterns for opaque bodies - Google Patents

Improvements to projection lanterns for opaque bodies

Info

Publication number
FR665972A
FR665972A FR665972DA FR665972A FR 665972 A FR665972 A FR 665972A FR 665972D A FR665972D A FR 665972DA FR 665972 A FR665972 A FR 665972A
Authority
FR
France
Prior art keywords
opaque bodies
lanterns
projection
projection lanterns
opaque
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
Application number
Other languages
French (fr)
Inventor
Marcel Berge
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 FR665972A publication Critical patent/FR665972A/en
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
    • G03B21/06—Projectors or projection-type viewers; Accessories therefor affording only episcopic projection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR665972D 1927-12-17 1928-12-17 Improvements to projection lanterns for opaque bodies Expired FR665972A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE665972X 1927-12-17

Publications (1)

Publication Number Publication Date
FR665972A true FR665972A (en) 1929-09-25

Family

ID=3877277

Family Applications (1)

Application Number Title Priority Date Filing Date
FR665972D Expired FR665972A (en) 1927-12-17 1928-12-17 Improvements to projection lanterns for opaque bodies

Country Status (1)

Country Link
FR (1) FR665972A (en)

Similar Documents

Publication Publication Date Title
FR665972A (en) Improvements to projection lanterns for opaque bodies
FR641679A (en) Improvements to taps
FR646188A (en) Binoculars improvements
FR25441E (en) Projection lantern for opaque bodies
FR25810E (en) Projection lantern for opaque bodies
FR677220A (en) Improvements to the lantern bodies for cinematographic projection devices and others
FR26476E (en) Projection lantern for opaque bodies
FR649914A (en) Improvements to cinematographic projection devices
FR665286A (en) Improvements to projectors
FR653847A (en) Improvements to projectors
FR651261A (en) Improvements to projectors or lanterns
FR644832A (en) Improvements to projection lanterns
FR643277A (en) Improvements to projection devices
FR646633A (en) Improvements to saxophones
FR661674A (en) Improvements to lamps
FR647445A (en) Improvements to cinematograph screens
FR526647A (en) Projection lantern for opaque bodies
FR645751A (en) Lantern refinements
FR629132A (en) Improvements to servo-brakes
FR631695A (en) Improvements to projection lantern transformation devices
FR647316A (en) Improvements to duplicators
FR645254A (en) Improvements to duplicators
FR662140A (en) Improvements to projection screens for advertising
FR697956A (en) Improvements to illuminated projectors
FR668035A (en) Improvements to illuminated projectors