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Subcontracting aircraft parts. High speed production of small parts for airplane sub-assembling is expedited by simultaneous use of the three drills shown. This plant has been converted from its former use as an airship dock. Goodyear, Akron, Ohio
Subcontracting aircraft parts. High speed production of small parts for airplane sub-assembling is expedited by simultaneous use of the three drills shown. This plant has been converted from its former use as an airship dock. Goodyear, Akron, Ohio
Government discovers method to preserve film. Scratch resistance, film, particulary the emulsion side, may become damaged through scratching. D. Levinsky of the Bureau is using an instrument which tests the resitance of a film by measuring the width of a scratch produced by a diamond point under a given load. Another method is to put a piece of film in a bottle of sand, revolve the bottle a certain number of times, then measure the haxiness developed. Many commercial treatments designed to increase the hardness of the emulsion have been investigated, 7838
Government discovers method to preseve film. Folding endurance test, The flexibility is measured in this folding endurance tester. A strip of film is folded back and forth under tension until it breaks, and the number of folds it withstands is counted. Three types of films have been studied, termed accoring to the chemical process of making them, acetate, viscose, and nitrate. The acetate base proved to be very stable on heating and is considered suitable for permanent records if properly made. The nitrate base became brittle quite raipidly and is considered unsuited for record purposes. The viscose base is in an intermediate position similar to that of record papers made from ordinary bleach wood fiber, 7/8/38
Government discovers method to preseve film. Folding endurance test, The flexibility is measured in this folding endurance tester. A strip of film is folded back and forth under tension until it breaks, and the number of folds it withstands is counted. Three types of films have been studied, termed accoring to the chemical process of making them, acetate, viscose, and nitrate. The acetate base proved to be very stable on heating and is considered suitable for permanent records if properly made. The nitrate base became brittle quite raipidly and is considered unsuited for record purposes. The viscose base is in an intermediate position similar to that of record papers made from ordinary bleach wood fiber, 7838
Conversion. Floor waxer plant. The owner of this small Eastern floor waxer plant (left) has planned for and almost completed conversion of his equipment to accomodate the defense production for which he has subcontracted. This five-spindle drill press, once used in manufacture of floor waxing machines, has been equipped with special chuck and drill for production of anti-aircraft guns. Floorola Products Inc., York, Pennsylvania
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Summary
Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description
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Date
1925
Source
Library of Congress
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No known restrictions on publication.