Living pictures; their history, photoproduction and practical working. With a digest of British patents and annotated bibliography (1899)

Record Details:

Title:
Living pictures; their history, photoproduction and practical working. With a digest of British patents and annotated bibliography
Date:
1899
Publisher:
London Optician & Photographic Trades Review
Volume:
Living pictures; their history, photoproduction and practical working. With a digest of British patents and annotated bibliography
Leaf #:
00089
Language:
English
Collection:
Books
Format:
Books
Contributor:
Robarts - University of Toronto
Sponsor:
University of Toronto
Coordinator:
Media History Digital Library
Description:
52
Date Added:
July 19, 2022
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CHRONO-PHOTOORAPliy. 71 act through four holes in a screen, forming marks at the sides of each picture for the purpose of punching holes in exact register. M. Marey, towards the end of 1890, constructed a chrono-photographic camera in which a band passing from one spool to another was employed. This apparatus had been gradually evolved from one con- structed in the year 1888, having a ^^/>^r negative band periodically arrested by an electro-magnetic grip. In 1889 the paper gave place to film, and a zoetropic instrument combining views so obtained was exhibited at the Paris Exhibition of that year, when M. Marey showed the apparatus to Mr. Edison. In 1890 the mechanical details were finally arranged as shown in ^yyyyyyyyyy yyyAx ^yy//////////Z22^ Fig. 74. Fig. 74. The CJironophotographe, or, as it was first called, the Photochronographe^ was driven by clock- work, and all its parts could (previously to making an exposure) be set in motion without actuating the film. On touching a stud a friction-roller pressed the film against the top right-hand roller (already in motion as stated), which then began to drag the film off the left- hand bobbin, past the exposure opening, and past a spring, as shown by the dotted line. The receiving- bobbin was mounted on a revolving spindle, but could not itself revolve, by reason of the pressure exerted on it by a brake. So soon, however, as the stud pressed the friction-roller against first-mentioned roller this brake was taken off, and the receiving-bobbin, being