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US Patent: 814,157
Attachment for Steel Squares
Patentee:
Thomas F. Norfolk (exact or similar names) - Ottumwa, IA

USPTO Classifications:
33/427, 33/DIG16

Tool Categories:
layout tools : squares : carpenter squares

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Lulu M. Ryder
Grace Heflin

Patent Dates:
Applied: Mar. 06, 1905
Granted: Mar. 06, 1906

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Russ Allen.
Description:
Rectangular base plate with each end extending beyond the sides of the square an equal distance that can be clamped on a square to facility repetitive marking of items such as for box making. Second figure shows the use of two of the attachments.

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