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US Patent: 1,421,921
Rotary Glass Cutter
Patentee:
Carl F. Doerr - Yonkers, NY

USPTO Classifications:
33/27.03

Tool Categories:
knives and cutters : glass cutters
layout tools : compasses

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Edw. Thorpe
Theo. G. Nester

Patent Dates:
Applied: Apr. 22, 1921
Granted: Jul. 04, 1922

Patent Pictures:
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Description:
This is a glass cutting compass that features a rotating cutter head and several interesting adjustment features.

The same inventor patented an improvement to the adjuster mechanism a few weeks later (1,424,625 - 8/1/1922).

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