US Patent: 883,212
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| Spirit Level
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Patentee:
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| George W. Lingle (exact or similar names) - Chicago, Cook County, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 09, 1906 |
| Granted: |
Mar. 31, 1908 |
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Patent Pictures:
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1 | 2
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Joel Havens
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Description: |
| Clarence W Taylor - patent attorney.
There is some confusion with US-883,642, another level issued the same day.
Abstract:
This invention relates to new and useful improvements in spirit levels, and has for its objects, first, to provide a liquid measuring instrument adapted to maintain the upper surface of the liquid in more than one plane at the time of reading; second, to facilitate a condition of rest of the upper surface of the liquid and increase the promptitude of the instrument in furnishing indications of the variations, if any, from the true level or the plumb line; third, to produce a one-glass, reversible spirit level to obviate thought or care which edge or end should be used on the work; and, forth, to provide one or more fixed reading bars in the liquid chamber.
Claim:
A spirit level comprising a ring and side plates arranged to constitute a liquid container, a liquid, and means extending to near the center of the container and cooperating with a transparent side thereof for holding' the upper surface of the liquid in more than one plane at the time of reading. |
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