Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1977-07-18
1979-08-14
Whitehead, Harold D.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51219R, B24B 330
Patent
active
041641000
ABSTRACT:
An auxiliary device for facilitating re-grinding and sharpening of spiral drills used by a home or do-it-yourself amateur in conjunction with a conventional grinding machine mounted on a table and having a rotating grinding wheel or disk exposed on a horizontal shaft. The device comprises a fork-shaped bracket including means for clamping to the table. Grooves are provided in the upper surfaces of the forks for bearings which rest in these grooves and are aligned thereby. The device includes a swiveling part which is loosely held into the grooves to accomodate the drill workpiece which is to be reground. Axle journal members in the bearings provide the swiveling movement of the workpiece.
The swiveling part is provided with a groove between the axle journal members into which the workpiece is inserted and this groove has a clearance below the axis of the axle journals and is directed slantingly toward the grinding surface or path of the grinding disc thereby providing the desired re-grinding angle.
REFERENCES:
patent: 1052073 (1913-02-01), Mallory
patent: 2745228 (1956-05-01), Nadelin
patent: 3100956 (1963-08-01), Niquet
patent: 3393476 (1968-07-01), York
patent: 3808748 (1974-05-01), Gunnerson
Saffitz Abraham A.
Whitehead Harold D.
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