While working at the machine shop, Banker invented a saw-filing machine.
2.
West invented an automated can-filing machine and was the first on the lower Columbia River to make use of salmon waste for oil and fishmeal by-products.
3.
Files are produced specifically for use in a " filing machine ", which is similar in appearance to a scroll saw with a vertically reciprocating file mounted in the middle of a table.
4.
For some time, interchangeable-part manufacturing in metal would continue to be a combination of machine-made parts and human skill in filing machined parts to precise size for such high-end uses as military weapons, in which interchangeable parts were worth paying for at high prices ( they were worth high prices because an army on campaign could cannibalize damaged weapons for parts ).
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