US Patent: 421,786 - Spirit Level


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US Patent: 421,786

Spirit Level

Patentee:

Justus A. Traut (exact or similar names) - New Britain, CT

USPTO Classifications:

33/386

Tool Categories:

layout tools : levels

Assignees:

The Stanley Rule & Level Co. - New Britain, CT

Manufacturer:

The Stanley Rule & Level Co. - New Britain, CT

Witnesses:

George U. Traut

Chas. B. Stanley

Patent Dates:
Applied:	Dec. 12, 1889
Granted:	Feb. 18, 1890

Patent Pictures:

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Description:

Simple and cheap mounting for adjustable spirit levels using a hanging bracket and threaded screw arrangement as well as a simple and convenient observation of the bubble. Improved observation is accomplished by use of a slightly larger opening at the top dead center point of the level.