US Patent: 334,803
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| Pencil-sharpener
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Patentee:
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| George H. Phelps (exact or similar names) - Newton, MA |
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Patent Dates:
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| Applied: |
Oct. 12, 1885 |
| Granted: |
Jan. 26, 1886 |
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Jeff Joslin
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Description: |
| Improvements to the Stimpson pencil sharpener of patent 304,371, which uses a spring to press the pencil against a file; the difficulty was that the amount of force should vary according to the size and hardness of the pencil but the Stimpson design did not allow the force to be adjusted. The improvement provides an adjustable lever to vary the force. |
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