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US Patent: 17,870
Adjustment Applied to Pendulum Levels
Patentee:
Calvin Cole - Tarrytown, NY

USPTO Classifications:
33/351, 33/385, 33/398, D10/69

Tool Categories:
layout tools : levels : level adjustments

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Francis S. Low
Sidney Low

Patent Dates:
Granted: Jul. 28, 1857

Patent Pictures:
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Description:
This patent covers a standard inclinometer or pendulum level, with a level vial to check for true level, and a micrometer adjustment of the inclinometer needle to ensure an accurate reading.

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