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US Patent: 228,958
Calipers and Dividers
Patentee:
William H. Warren - New York, NY

USPTO Classifications:
33/558.1

Tool Categories:
layout tools : calipers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
L. L. Storer
C. Sedgewick
C. Neveux

Patent Dates:
Applied: Dec. 22, 1879
Granted: Jun. 15, 1880

Patent Pictures:
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Description:
This design features a slotted arm attached to a threaded rod. The slotted arm holds a clamping screw for coarse adjustment, enad the threaded rod engages a nut for fine adjustment

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