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US Patent: 2,922,258
Grinder with oscillating head
Patentees:
Ramsay M. Bell (exact or similar names) - Schoolcraft, MI
Miles M. Bass (exact or similar names) - Kalamazoo, MI
Lee C. Hammond (exact or similar names) - Kalamazoo, MI
Philip J. Robischung (exact or similar names) - Kalamazoo, MI

USPTO Classifications:
451/159, 451/294, 451/414

Tool Categories:
metalworking machines : grinders : tool grinders
metalworking machines : electrochemical machining

Assignees:
Hammond Machinery Builders, Inc. - Kalamazoo, MI

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 29, 1956
Granted: Jan. 26, 1960

Patent Pictures:
USPTO (New site tip)
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Description:
This patent tool grinder used a mix of conventional and electrochemical (ECM) material removal, and it was probably the second commercially available ECM product, after one made by Anocut Engineering, Inc., of Downer's Grove, IL.; see patent 2,826,540 for the technology behind the Anocut machine.

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