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US Patent: 7,331
Board and Log Rule
Patentee:
Benjamin M. Van Der Veer - Clyde, NY

USPTO Classifications:
235/87R

Tool Categories:
rules : lumber rules

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Hiram P. Jones
Wm. Van Der Veer, II

Patent Dates:
Granted: Apr. 30, 1850

Patent Pictures:
USPTO pdf tiff
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Description:
This is a pretty cool and gadgety variation on the standard log rule

The rule itself is hollowed out, and a cylindrical member holding a log table placed inside. One side of the rule has a window cut into it, so that the table can be seen. Turning the cylinder can show any of a number of log measures, allowing more than the standard 8 tables to be shown on a single rule.

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