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
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GB1915525A
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Individual
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Individual
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Priority to GB1915525ApriorityCriticalpatent/GB258708A/en
Publication of GB258708ApublicationCriticalpatent/GB258708A/en
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
G03B27/00—Photographic printing apparatus
G03B27/02—Exposure apparatus for contact printing
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Coating Apparatus
(AREA)
Abstract
258,708. Taylor, D. R. N. July 28, 1925. Valves, arrangement of. -A suction pump for use in a photographic printing apparatus is fitted at the bottom with a non-return ball valve 62, and the plunger 16 is fitted with leather or like packing 59 and with air escape openings 60.
GB1915525A1925-07-281925-07-28Improvements in photographic printing apparatus
ExpiredGB258708A
(en)
George Robert Hughes, Sainte Demotic Land Leases, The Oriental Institute of the University of Chicago, Studies in Ancient Oriental Civilisation No. 28, Chicago 1952; pp. 112, pl. 3 (Book Review)