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 #:
00051
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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DIA GRA M ILL US IONS. 33 As shown in Fig. 31 the Pedemascope is fitted with a design giving the effect of jumping, an action from which its name is derived. A card bearing the two extremes of a movement printed on its two sides was mounted in a wooden holder by means of a longitudinal groove, and the holder was rapidly twirled between finger and thumb, backward and forward, through a half- revolution, by means of an axial pin projecting through a handle. Stops were arranged on this latter to prevent the card exceeding the necessary half-turn, and the apparatus may be con- sidered as one of the most simple for exhibiting the illusion of motion. In 1868 Langlois and Angiers invented and patented a means of rapidly alternating two microscopic views by means of a pushing-piece, the views returning by the spring of a block of rubber against which they were mounted. This de- vice they named the Kinescope; and a multiple form, designed for a watch- chain charm, is shown in Fig. 32. Their specifica- tion also refers to this device as the Photoscope, Another example of this Fig. r^; two-diagram class is the ordinary magic-lantern Slipping- Slide. One glass bears a figure with, for example, his legs in duplicate, one set being raised and the other D