US Patent: 248,162
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| Combined Calipers and Rule
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Patentee:
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| Peter D. Graham (exact or similar names) - Black Hawk, CO |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 05, 1881 |
| Granted: |
Oct. 11, 1881 |
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Ralph Brendler
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Description: |
| This is a really unusual combination tool. It consists of two sets of calipers, each with a sharp point on the back, mounted on a rule such that the entire apparatus may be used as a beam compass.Just to make it interesting, there is another reference face to allow it to be used as a measuring gauge.
It seems like all of the tools would interfere with each other, making none of them particularly useful. |
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