US Patent: 1,297,740
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| Boring-tool
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Patentee:
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| Carl H. Schmidgall (exact or similar names) - Peoria, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 16, 1917 |
| Granted: |
Mar. 18, 1919 |
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Jeff Joslin
"Popular Science" article on this invention.
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Description: |
| According to an article in the August 1919 Popular Science, this machine is "the result of twelves years of work, and is a marvel of mechanical simplicity. Six days after receiving his patent on it, March 24, 1919, his new invention was declared by one of he largest universities in the United States to be a practical, simple, and durable machine of sound design.Not only does Schmidgall's new invention bore square holes, but by slight variations in the cutters it will bore holes of almost any shape—octagons, ovals, key-holes, and many-sided and irregular holes."The above-mentioned article describes its use in drilling wood, stone, and metal. Reading between the lines it seems as if stone was the primary material it was used for. The article says that Schmidgall "runs a shop in Peoria"; the 1910 census lists Mr. Schmidgall as a blacksmith. We could not find any other hints of what the intended use for this machine might be, nor did we find any suggestion that it was ever manufactured. |
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