US Patent: 735,136
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| Folding Square
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Patentee:
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| Jonathan Nelson (exact or similar names) - Warsaw, IN |
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Patent Dates:
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| Applied: |
Nov. 05, 1902 |
| Granted: |
Aug. 04, 1903 |
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Patent Pictures:
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Russ Allen.
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Description: |
| Square that locks closed using an adjustable spring plate on one arm and has a stop to limit the opening angle. Also one scale has a hole used to determine the longitudinal position of the scale by engaging a pin that is located at a point equal distance from each measuring edge when open on the other arm. This measurement feature does not appear to have been included in the production model.
Known example is only marked with the patent date: AUG 4TH, 1903 |
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