US Patent: 440,174 - Extension Hack Saw Frame


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US Patent: 440,174

Extension Hack Saw Frame

Patentee:

Warren C. Marston (exact or similar names) - Millers Falls, MA

USPTO Classifications:

30/510

Tool Categories:

metalworking tools : hacksaws

Assignees:

Warren C. Marston - Millers Falls, MA

Robert H. Austin - New Haven, CT

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	Sep. 30, 1889
Granted:	Nov. 11, 1890

Patent Pictures:

Warren C. Marston patent November 11, 1890

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Description:

The frame length is adjustable by a stud on a spring that fits in a series of holes. The blades are attached by split rings that run through a holes in the blades and in the attachment studs. The blade is tightened by a wing nut on one attachment stud.