US Patent: 1,859,600 - Friction Clutch Mechanism


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US Patent: 1,859,600

Friction Clutch Mechanism

Patentee:

Jacob H. Prettyman (exact or similar names) - Marion, Marion County, OH

USPTO Classifications:

192/43, 192/43.1, 192/44, 81/59.1

Tool Categories:

wrenches : ratchet wrenches

Assignees:

Fairfield Engineering Co. - Marion, Marion County, OH

Manufacturer:

Not known to have been produced

Witnesses:

none listed

Patent Dates:
Applied:	Aug. 04, 1930
Granted:	May 24, 1932

Patent Pictures: [ 1 | 2 ]

Jacob H. Prettyman patent May 24, 1932 - sheet 1

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Description:

Reversible "roller ratchet." Several alternate constructions are shown and described. A 1932 newspaper article indicated Wright Tool & Forge intended to produce this wrench at Barberton, OH, with Mr. Prettyman supervising production.