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US Patent: 86,407
Improvement in saws
Nicholas Jenkins - New York, NY

USPTO Classifications:
30/389, 83/491

Tool Categories:
woodworking machines : circular saws : annular saws


Not known to have been produced

Frank A. Hadicke
W. C. Dey

Patent Dates:
Granted: Feb. 02, 1869
Antedated: Jan. 18, 1869

Patent Pictures: [ 1 | 2 ]
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This unusual machine has a circular sawblade with all but the rim removed. The saw is meant to be used for curved cuts, rather like a bandsaw. The advantage over a bandsaw is that blade does not need to flex as it rotates; at the time of the patent, bandsaw blades were prone to breakage due to metal fatigue.

Compare this patent to that for "Grant's annular saw", patent 973.

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