US Patent: 1,670,772 - Vertical boring mill


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US Patent: 1,670,772

Vertical boring mill

Patentee:

Frank S. Jones (exact or similar names) - Philadelphia, PA

USPTO Classifications:

82/122

Tool Categories:

metalworking machines : drilling and boring : vertical boring mills

Assignees:

None

Manufacturer:

Jones Machine Tool Works - Philadelphia, PA

Witnesses:

Unknown

Patent Dates:
Applied:	Jul. 09, 1925
Granted:	May 22, 1928

Patent Pictures:

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Vintage Machinery entry for Jones Machine Tool Works

Description:

The patent description says that vertical boring mills suffered from high friction as the table is rotated, which limited the speed and finish quality. The object of the invention is to overcome these difficulties by reducing friction as the table is rotated.