US Patent: 52,453
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Improvement in Rulers
Flexible Ruler
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Patentee:
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| G. W Schramm (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Feb. 06, 1866 |
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Ralph Brendler
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Description: |
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This is a simple design for a ruler made of a composite of India rubber
and a stiffer material (steel and whalebone are mentioned as possibilities),
that allow the ruler to flex slightly while still remaining stiff.
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