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US Patent: 376,814
Grindng Machine
John A. Coleman - Providence, RI

USPTO Classifications:

Tool Categories:
metalworking machines : grinders : cylindrical grinders
metalworking machines : grinders : surface grinders


Not known to have been produced

O. Lapham
Marston Lincoln

Patent Dates:
Applied:  23, 1885
Granted: Jan. 24, 1888

Patent Pictures:
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The object of my invention is to obviate the necessity for separate machines to do the two classes of grinding, and to reduce expense by organizing one machine so that it shall possess the capacity to do both kinds of work; and to this end I have, as I believe, for the first time, embodied in one machine a reciprocating table and a grinding-wheel so arranged that by variations in adjustment the grinding-wheel may be made to occupy its proper position with relation to the metal to be ground, whether flat or circular, and to operate at its grinding face either parallel with the path of the table or at right angles thereto, the gist of my invention being so mounting the table and wheel with reference to each other that the path of the metal to be ground may be varied from a line which is at right angles to the axis of the wheel to a line which is parallel with said axis.

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