US Patent: 30,009 - Spring Dividers


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US Patent: 30,009

Spring Dividers

Patentee:

Joseph W. Strange (exact or similar names) - Bangor, ME

USPTO Classifications:

33/558.07

Tool Categories:

layout tools : calipers

layout tools : compasses : dividers

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

T. W. Porter

A. L. Simpson

J. S. Jenness

Patent Dates:
Granted:	Sep. 11, 1860

Patent Pictures:

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Description:

This patent covers an adjustment mechanism for calipers and dividers, consisting of a sliding "collar" that holds the legs together. As the collar is moved up and down, the taper of the legs allows them to move in and out.