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US Patent: 205,543
Improvement in Compasses
Patentees:
Thomas H. Grigg (exact or similar names) - West Meriden, CT
George G. Stillman (exact or similar names) - Westerly, RI

USPTO Classifications:
33/558.07

Tool Categories:
layout tools : compasses

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Theo. G. Ellis
Geo. G. Stillman
Eliahu J. Martin
Geo. B. Jwewett

Patent Dates:
Applied: May 22, 1878
Granted: Jul. 02, 1878

Patent Pictures:
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Description:
This patent covers a new kind of screw-adjustment for a compass. The screw actuates a cam that engages a pin in each leg, allowing very fine movement.

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