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US Patent: 373,100
Protractor and Circle Scribing Attachment for Rulers
Patentee:
James G. Smith - Jamestown, NY

USPTO Classifications:
33/473

Tool Categories:
rules : rule attachments

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Frank W. Stevens
Fred R. Peterson

Patent Dates:
Applied: Mar. 30, 1887
Granted: Nov. 15, 1887

Patent Pictures:
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Description:
Attachment for a bench rule that allows it to be used for scribing circles and drawing angles. Loop on the end is for a pencil to be used as the pivot point.

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