US Patent: 441,522 - Threshold Gage


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US Patent: 441,522

Threshold Gage

Patentee:

Alexander Watson (exact or similar names) - Brookline, MA

USPTO Classifications:

33/194

Tool Categories:

layout tools : special purpose gauges

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	May 31, 1890
Granted:	Nov. 25, 1890

Patent Pictures:

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Description:

This tool aids in the layout of door thresholds. It allows adjustment of all aspects of the jamb, allowing the entire door to be layed out in one operation.