Patent Model - Improvement in Machines for Grinding Saws

Maker and role
Charles Hubbard (b.1828, d.1905), Patentee
Production date
Jul 14 1868
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Object detail

Iron, steel, brass, copper, walnut (visual)
11 x 9 x 10 1/8" (27.9 x 22.9 x 25.7cm)
The nature of Hubbard's invention "consists in providing machines for grinding saws with a metallic belt, which, in connection with feed-rollers, will move the saw-blade up to the action of the grindstone with a force only equal to the grinding-capacity of the grindstone." (Patent Number 79,980)
Object number
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