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 #:
00080
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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'<52 LIVING FICTURES. Fig. 6s. was patented, and in the same specification M. Demeny showed some modifications directed towards obtaining longer series. This form of the apparatus does not appear to have been publicly exhibited, but is sufficiently interesting to merit description. The views were mounted in spiral on a non-transparent drum, the axis of the latter being furnished with a helix which tra- versed the drum at such a rate as to maintain the spiral set of pictures under the inspection lens, as seen in Fig. 65. The shutter was not interposed between eye and picture as is usually the case, but was mounted between light and drum. Fig. 66 shows the beam of light passing through the slot in the shutter B, and after undergoing a deviation by the mirror 7n, falling on the drum and thus illuminating the successive pictures by inter- mittent flashes as the slot m the shutter periodically permits light to pass. A reference to Fig. 11 will demonstrate the relation between Lommel's invention of 1881 and that of Demeny in 1892 ; the prin- ciple being the same although the latter apparatus gave a longer series and displayed but one image at a time. The specification suggests that a phonograph might be combined with the inspection apparatus—an idea previously set forth by Donisthorpe in 1876 and 1878. During these later years the extreme rapidity attained by photographic emulsions, together with the possibilit)^ of obtaining long lengths of flexible transparent film, 66,