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US Patent: 423,094
Apparatus for Leveling and Marking Shafts
Patentee:
Edward Henry Taylor - Paterson, NJ

USPTO Classifications:
33/386, 33/451, 33/485

Tool Categories:
layout tools : levels : metallic levels

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Jesse Aspinall
John Hardman
A. Ruppert
H. A. Daniels

Patent Dates:
Applied: Dec. 02, 1888
Granted: Mar. 11, 1890

Patent Pictures:
USPTO pdf tiff
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Description:
This level features a V-shaped base to allow it to automatically center itself on a shaft, and an adjustment screw to set a specific declination.

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