US Patent: 191,389
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| Improvement in Spirit Levels
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Patentees:
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| Frederick T. Ward (exact or similar names) - Mohawk, NY |
| Thomas Bedworth (exact or similar names) - Mohawk, NY |
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Patent Dates:
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| Applied: |
Apr. 21, 1877 |
| Granted: |
May 29, 1877 |
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Patent Pictures:
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Russ Allen.
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Description: |
| Primary patented element is the hinged level casing that enables the user to only need one spirit vial to measure level and plumb. While the body is perforated longitudinally to form a "sight" its detailed construction is specifically not claimed in the patent. Preferred construction method is listed as using cast iron. |
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