US Patent: 52,579 - Improvement in Spirit-Levels


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US Patent: 52,579

Improvement in Spirit-Levels

Patentee:

Rudolph Ledig (exact or similar names) - Newark, NJ

USPTO Classifications:

33/387

Tool Categories:

layout tools : levels : inclinometers

layout tools : levels : level adjustments

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Granted:	Feb. 13, 1866

Patent Pictures:

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Description:

This is a level and inclinometer that uses a pivoting vial to adjust or measure angles. The pivot is controlled by a fine thumbscrew for accurate adjustment.