US Patent: 82,917
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| Centering Square
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Patentee:
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| George W. Brooks (exact or similar names) - Clinton, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Oct. 13, 1868 |
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Joel Havens
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Description: |
| The nature of my invention consists in applying to an angle of ninety degrees, made of iron or any other suitable material, of the proper form, a movable tongue, of an L-form, which shall be attached to the angle by a bolt and thumb-nut, in such a way that it will divide the angle exactly in the centre, thus making a tool, which can be used for making a longitudinal line on shafting or anything of a like form, or for centring shafting or circular disks, and also as an inside or an outside square. |
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