US Patent: 181,331 - Improvement in Dividers


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US Patent: 181,331

Improvement in Dividers

Patentee:

Adolphe Gruber (exact or similar names) - Boston, MA

USPTO Classifications:

33/27.02

Tool Categories:

layout tools : compasses : dividers

Assignees:

L. Prange & Co. - Boston, MA

Manufacturer:

L. Prange & Co. - Boston, MA

Witnesses:

Patent Dates:
Applied:	Apr. 24, 1876
Granted:	Aug. 22, 1876

Patent Pictures:

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Description:

This divider features a reversible point, one side of which is a drafting pen, and the other a pencil holder. The primary patent claims are for a small nib in the arm that allows accurate alignment of the reversible arm.