US Patent: 828,895
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| Screw Driver and Other Hand Tool
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Patentees:
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| Charles F. Mueller (exact or similar names) - Elizabeth, Union County, NJ |
| Henry R. Braunsdorf (exact or similar names) - Elizabeth, Union County, NJ |
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Patent Dates:
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| Applied: |
Oct. 12, 1904 |
| Granted: |
Aug. 21, 1906 |
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Patent Pictures:
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Charles F. Mueller & Henry R. Braunsdorf patent August 21, 1906 |
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Stan Schulz
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Description: |
| The patent describes the parts and method of assembly to form the screwdriver. The key elements include: the shaft is continuous through the handle, and has a non-circular profile through the wood handle; there is a "collar" with gripping spurs inside the base of the ferrule, and a metal end cap on the handle.
Marketed as the NEW CENTURY SCREWDRIVER; the patent was also used for the handles of ice picks and carpenters' chisels. |
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