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US Patent: 128,087
Improvements in Plow-Clevises
Patentee:
Edgar Alfred Wright (exact or similar names) - Fort Madison, IA

USPTO Classifications:
278/96

Tool Categories:
agricultural : clevises

Assignees:
None

Manufacturer:
Unknown

Witnesses:
John Amborn
S. A. Moore
E. H. Bates
Geo. E. Upham
Patent Dates:
Applied: Apr. 15, 1872
Granted: Jun. 18, 1872

Patent Pictures:
Patent 128,087 - edited drawing
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Description:
The bolt through the "flanges" allows horizontal movement while keeping a firm vertical adjustment.

The clevis appears in an 1876 S.D. Kimbark (Chicago) catalog.

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