US Patent: 1,229,401
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| Drill gearing
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Patentees:
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| Alonzo Galloway Decker (exact or similar names) - Orangeville, MD |
| Samuel Duncan Black (exact or similar names) - Baltimore, MD |
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Patent Dates:
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| Applied: |
Mar. 23, 1916 |
| Granted: |
Jun. 12, 1917 |
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Jeff Joslin
Vintage Machinery entry for Black & Decker Mfg. Co., Ltd.
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Description: |
| "The primary object of this invention is the provision in a portable drill of a variable speed disk drive between the power motor of the drill and the chuck spindle or such other member as drives the drill directly. Another object of the invention is to utilize an element of this disk drive as a fan for creating an air draft to cool the motor." |
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