FR828977A - Perfectionnements aux appareils de projection - Google Patents

Perfectionnements aux appareils de projection

Info

Publication number
FR828977A
FR828977A FR828977DA FR828977A FR 828977 A FR828977 A FR 828977A FR 828977D A FR828977D A FR 828977DA FR 828977 A FR828977 A FR 828977A
Authority
FR
France
Prior art keywords
projection devices
projection
devices
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
English (en)
Inventor
Verneur Edmund Pratt
Zoltan Takats
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 FR828977A publication Critical patent/FR828977A/fr
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
    • G03B21/10—Projectors with built-in or built-on screen
    • G03B21/11—Projectors with built-in or built-on screen for microfilm reading
    • G03B21/111—Projectors with built-in or built-on screen for microfilm reading of roll films
    • 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
    • G03B21/10—Projectors with built-in or built-on screen

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
FR828977D 1936-11-18 1937-11-10 Perfectionnements aux appareils de projection Expired FR828977A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US111438A US2125582A (en) 1936-11-18 1936-11-18 Projection device

Publications (1)

Publication Number Publication Date
FR828977A true FR828977A (fr) 1938-06-07

Family

ID=22338549

Family Applications (1)

Application Number Title Priority Date Filing Date
FR828977D Expired FR828977A (fr) 1936-11-18 1937-11-10 Perfectionnements aux appareils de projection

Country Status (2)

Country Link
US (1) US2125582A (fr)
FR (1) FR828977A (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE962402C (de) * 1941-05-14 1957-04-18 Electricitaets Ges Sanitas M B Hilfsgeraet fuer Roentgenschirmbildphotographie
US2479553A (en) * 1944-12-13 1949-08-23 Manufacturers Machine & Tool C Film picture projection system corrected for spherical aberration
US2517414A (en) * 1945-03-07 1950-08-01 Verneur E Pratt Film projector with rotatable turret head
US2464220A (en) * 1945-04-28 1949-03-15 Robert C Dunean Film record selecting and projecting device
US2473736A (en) * 1946-05-22 1949-06-21 Stern Nathan Saliy Microfilm reader and projecting apparatus
US2481850A (en) * 1946-12-05 1949-09-13 Edmund F Lindner Microfilm projection viewer having manual lens adjusting and film moving means
US2518682A (en) * 1947-10-17 1950-08-15 Eastman Kodak Co Fixed plane film guiding means for viewing and projection devices
US2591139A (en) * 1947-11-12 1952-04-01 American Optical Corp Film handling apparatus for projection devices

Also Published As

Publication number Publication date
US2125582A (en) 1938-08-02

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