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US Patent: 48,376
Improvement in Saws
Hacksaw
Patentee:
Alfred Dawes - Waltham, MA

USPTO Classifications:
30/513

Tool Categories:
woodworking tools : handsaws : frame saws

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Edwin A. Johnson
Geo. H. Shirley

Patent Dates:
Granted: Jun. 27, 1865

Patent Pictures:
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Description:
Two opposing handles with a metal frame where the blade is attached to a screw shaft to enable it to be held and tightened. Purpose is intended to introduce a new type of saw for metals.

Earliest patent for blade tensioning in 513 subclass

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