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US Patent: 423,094
Apparatus for Leveling and Marking Shafts
Patentee: Edward Henry Taylor (exact or similar names) - 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 (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
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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