US Patent: 743,033 - Drill-grinding machine


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US Patent: 743,033

Drill-grinding machine

Patentee:

Corneil Ridderhof (exact or similar names) - Grand Rapids, MI

USPTO Classifications:

451/155

Tool Categories:

metalworking machines : grinders : drill grinders

metalworking machines : grinders : sharpening machines : drill sharpening machines

Assignees:

Wilmarth & Morman Co. - Grand Rapids, MI

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Jan. 08, 1903
Granted:	Nov. 03, 1903

Patent Pictures:

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Description:

This drill grinder is designed to use the standard flat disc-shaped grinding wheel rather than the more expensive and less common cup-shaped wheel. The design is an evolution of that of patent 643,703.