Patent Model - Improvement in Machines for Varnishing the Interior of Cartridge-Shells

Maker and role
Francis Pratt (b.1827, d.1902), Patentee
John Reynolds (b.1844, d.1927), Patentee
The Pratt & Whitney Company, Assignee
Production date
Apr 03 1877
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Object detail

Metal, wood
10 1/2 x 15 1/2 x 8" (26.7 x 39.4 x 20.3cm)
Pratt and Reynolds stated “Our invention has for its object the coating of the interior of metallic cartridge shells or cases with a suitable covering of varnish, to prevent any injurious action of the metal upon the powder or fulminate.” The original process of applying the varnish came with a great level of uncertainty as to whether in was evenly applied and was also a slow process. They hoped “…obviate these difficulties, and to perform this operation in a more rapid, thorough, and workmanlike manner. (Patent Number 189,057)
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