GB191029832A - Improvements in or relating to Moving Picture Devices. - Google Patents

Improvements in or relating to Moving Picture Devices.

Info

Publication number
GB191029832A
GB191029832A GB191029832DA GB191029832A GB 191029832 A GB191029832 A GB 191029832A GB 191029832D A GB191029832D A GB 191029832DA GB 191029832 A GB191029832 A GB 191029832A
Authority
GB
United Kingdom
Prior art keywords
electrodes
condenser
arc
main
breaker
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
Inventor
Thomas Joseph Murphy
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB191029832A publication Critical patent/GB191029832A/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
    • G03B21/14—Details
    • G03B21/32—Details specially adapted for motion-picture projection
    • G03B21/40—Eliminating or reducing effect of flicker

Abstract

29,832. Murphy, T. J. Dec. 22. Kinematograph apparatus. - In a kinematograph, the illumination is made intermittent being started when the pictures are in positior and extinguished while they are being changed The illuminating-means consists of an arc passec between rotating electrodes 3, 4 connected through brushes 5 to the main 1, 2, which is not normally sufficient to start the arc. A circuit consisting of a condenser 8 and a spark gap 9 is connected across the electrodes, the condenser being connected to the secondary 1( of an induction coil 12, of which the primary 11 is connected to the main through the contact breaker 13. This contact-breaker is operated through a cam 26 by a projection 25 on the wheel 24, which operates the intermittent-feed device. When the circuit 11 is opened, the difference of potential induced in the secondary causes the condenser to be charged; the condenser discharges across the gap 9 and the electrodes 3, 4, and, the resistance of the air between the electrodes being thus diminished, the arc passes and continues until rotation of the electrodes causes it to be ruptured. A magnet 31 serves to arch the arc.
GB191029832D 1910-12-22 1910-12-22 Improvements in or relating to Moving Picture Devices. Expired GB191029832A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191029832T 1910-12-22

Publications (1)

Publication Number Publication Date
GB191029832A true GB191029832A (en) 1911-06-15

Family

ID=32495742

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191029832D Expired GB191029832A (en) 1910-12-22 1910-12-22 Improvements in or relating to Moving Picture Devices.

Country Status (1)

Country Link
GB (1) GB191029832A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496102A (en) * 1945-12-18 1950-01-31 Du Mont Allen B Lab Inc Stroboscopic projection of intermittent film on television cameras
US2539228A (en) * 1949-02-18 1951-01-23 William E Celestin Intermittent lighting means for motion pictures

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496102A (en) * 1945-12-18 1950-01-31 Du Mont Allen B Lab Inc Stroboscopic projection of intermittent film on television cameras
US2539228A (en) * 1949-02-18 1951-01-23 William E Celestin Intermittent lighting means for motion pictures

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