US Patent: 440,174
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| Extension Hack Saw Frame
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Patentee:
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| Warren C. Marston (exact or similar names) - Millers Falls, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 30, 1889 |
| Granted: |
Nov. 11, 1890 |
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Patent Pictures:
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Warren C. Marston patent November 11, 1890 |
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Stan Schulz
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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. |
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