US Patent: 523,021 - Level Vial Adjustment


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US Patent: 523,021

Level
Level Vial Adjustment

Patentee:

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

USPTO Classifications:

33/384

Tool Categories:

layout tools : levels

Assignees:

None

Manufacturer:

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

Witnesses:

Patent Dates:
Applied:	Feb. 03, 1894
Granted:	Jul. 17, 1894

Patent Pictures:

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Description:

This design features an adjustment mechanism based on an offset cam. Turning a screw on the side will move one end of the level vial up/down to allow fine adjustment.