US Patent: 139,091 - Improvement in Machines for Forming the Lips of Augers


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US Patent: 139,091

Improvement in Machines for Forming the Lips of Augers

Patentee:

James Swan (exact or similar names) - Seymour, CT

USPTO Classifications:

76/2

Tool Categories:

Assignees:

None

Manufacturer:

Unknown

Witnesses:

S. W. Smith

Chas. W. Storrs

Patent Dates:
Applied:	Apr. 13, 1869
Granted:	May 20, 1873

Patent Pictures:

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Description:

Crimp dies are used to form both the curved lips and screw points and changes the present method of four operations and as many heatings to one operation.