US Patent: 1,033,712
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| Chain Drill
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Patentee:
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| George O. Leopold (exact or similar names) - Philadelphia, PA |
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Patent Dates:
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| Applied: |
Apr. 17, 1912 |
| Granted: |
Jul. 23, 1912 |
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Russ Allen.
"Vintage Machinery" entry for North Bros. Manufacturing Co.
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Description: |
| Improved, inexpensive feeding mechanism that allows the slack of the chain to be taken up by turning the spindle until sufficient pressure is exerted to engage the ratchet mechanism. |
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