US Patent: 163,880 - Improvement in modes of applying emery to metal surfaces


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US Patent: 163,880

Improvement in modes of applying emery to metal surfaces

Patentee:

Samuel G. Morrison (exact or similar names) - Williamsport, PA

USPTO Classifications:

125/15, 451/546, 51/295, 51/300, 51/307

Tool Categories:

industrial tools : grinding wheels

metalworking machines : grinders : sharpening machines : grinding wheels

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Hepburn McClure

Stephen W. Hall

Patent Dates:
Applied:	Sep. 01, 1874
Granted:	Jun. 01, 1875

Patent Pictures:

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Description:

A grinding wheel is constructed around a circular metal plate as follows: the plate is heated and coated with "flour of sulphur" which melts. Emery-paste is applied and then coated with dissolved gum-shellac. A thick paste of gum-shellac plus one part sulphur and seven parts emery is applied and then the wheel placed in a mould. The paste is tamped into the mould and then the mould is pressed and secured and then put in an oven. The heat should be sufficient to melt the sulphur.