US Patent: 883,642
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| Spirit Level
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Patentee:
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| Albert W. Hight (exact or similar names) - Ballard, King County, WA |
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Patent Dates:
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| Applied: |
Jul. 08, 1907 |
| Granted: |
Mar. 31, 1908 |
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Patent Pictures:
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Joel Havens
Martin J. Donnelly Antique Tools
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Description: |
| Robert B. Wilson - patent attorney
Abstract:
My invention relates to a spirit level, and has for its object to provide a convenient instrument of the kind, that is of simple and inexpensive construction and wherein the bubble glass is readily adjustable to accurately locate the plane of the bubble between indicating lines of the glass and parallel with planes of the body of the instrument, whereby whenever the plane of the bubble is located between the indicating lines, the planes of the body that are parallel therewith are also horizontal. A further object is to provide an instrument of the kind having one or more bubble tubes that may be readily and accurately adjusted therein to adapt the instrument for convenient and accurate use for either leveling or plumbing or both combined.
Claim:
In a level, the combination with a body having a plane base, and a counterbored transverse orifice parallel to the plane base, of a ring rotatably mounted in the orifice, arched bubble sight tube secured diametrically of the ring, annular plates in the counterbores, and clamping screws extending through the annular plates and the hoc adapted to press the plates oppositely on t body and the ring. |
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