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US Patent: 65,900
Improvement in Caliper Rules
Patentee:
Artemas W. Goddard - Clinton, MA

USPTO Classifications:
33/473

Tool Categories:
rules : rule attachments
layout tools : measurement gauges
rules : folding rules

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
C. F. W. Parkhurst
E. Richardson

Patent Dates:
Granted: Jun. 18, 1867

Patent Pictures:
USPTO pdf tiff
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Description:
A combined caliper and slide gauge rule that allows a user to measure diameters larger than possible by the caliper alone. The swinging caliper arms are used to gauge the diameter of the object and then the slide caliper rule is removed from the rule to measure across the arms.

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