US Patent: 1,433,814
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| Safety Device For Tools
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Patentee:
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| Frank William Grady (exact or similar names) - Niles, CA |
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Patent Dates:
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| Applied: |
Nov. 29, 1920 |
| Granted: |
Oct. 31, 1922 |
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Patent Pictures:
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Patent 1,433,814 - edited drawing |
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Stan Schulz
GRADY WEDGE (composite image -- FLICKR )
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Description: |
| Metal wedge with "reverse" facing "fishhook" spurs which act to hold position against loosening. A 1928 write-up mentions improvements in design and manufacturing process. Produced in several sizes to fit a range of wooden tool handles - hammers, axes, etc. & advertised as the "GRADY WEDGE." |
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