US Patent: 65,900 - Improvement in Caliper Rules


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US Patent: 65,900

Improvement in Caliper Rules

Patentee:

Artemas W. Goddard (exact or similar names) - 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:

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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.