US Patent: 3,590 - Revolving Board Rule


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US Patent: 3,590

Rule or Measure for Boards, Leather, &c.
Revolving Board Rule

Patentee:

Charles Ross (exact or similar names) - Piqua, OH

USPTO Classifications:

33/773

Tool Categories:

rules : lumber rules

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Warner Spencer

Thos. S. Matthew

Patent Dates:
Granted:	May 17, 1844

Patent Pictures:

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Description:

This is a strange little machine that uses a rolling wheel and graduated disk to measure a length. With some clever setup, this tool can be used to calculate area and volume, acting as a board rule.