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US Patent: 213,526
Improvement in Combination Measuring Tool
Patentee:
Samuel G. Otis - Springfield, MA

USPTO Classifications:
33/465

Tool Categories:
rules : folding rules
rules

Assignees:
None

Manufacturer:
S. G. Otis - Springfield, MA

Witnesses:
Geo. O. Kingsbury
Allen Webster

Patent Dates:
Applied: Dec. 02, 1878
Granted: Mar. 25, 1879

Patent Pictures: [ 1 | 2 | 3 ]
Image courtesy of Bill Wolst
USPTO pdf tiff
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Description:
Combined ruler that can be used for straight measuring, as a square or a bevel. Production model is 36 inches long and has a positive stop at 180 degrees by nature of its construction utilzing a rail type stop and angle markings at the rotating hinge to facilitate use of other angles. Specifically mentioned in the patent is that it is constructed with open space for printing advertising on the ruler.

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