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US Patent: 68,854
Grinding and Polishing Metals
Menno Albertus Diedrichs - Baltimore, MD
Johann Henricus Diedrichs - Baltimore, MD

USPTO Classifications:

Tool Categories:
specialty machines : polishing and buffing machinery
metalworking machines : grinders : tool grinders


Not known to have been produced

Solon C. Kemon
O. Knight
George A. Morrison

Patent Dates:
Granted: Sep. 17, 1867

Patent Pictures:
USPTO pdf tiff
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Munn & Co.- patent attorneys

This invention relates to an automatic arrangement for holding and feeding the article to be ground in relation to the stone, and in the means for adjusting the different parts to suit different sizes of tools. The tool to be ground is held in a suitable clamp on the upper surface of a reciprocating sliding frame which receives its motion, through a system of miter-wheels, from the shaft of the grindstone. The motion is reversed by the driving-wheel being thrown in and out of gear with the respective ones of a pair of beveled wheels on a stationary screw - shaft on the sliding frame by a weighted lever which is operated by projecting pins on the edge of the sliding frame. This frame slides in and is supported by another frame which is pivoted so as to be adjustable toward the stone, the adjustment being performed by a screw shaft at right angles with that on the sliding frame pivoted to the frame, and having its bearing in a swiveled box hung in a stationary arm attached to the water-reservoir of the stone. This shaft is provided with a pinion and ratchet device, and also with a hand wheel. When in operation the screw-shaft is operated by racks attached to the sliding frame in such a manner that, as soon as the tool is past the stone and the motion is being reversed, one of them will come in contact with the pinion and turn the screw, the ratchet serving to keep the screw from being turned backward when the frame is returning. The tool is thus fed up, so that a new surface will be presented to the stone each time the frame reciprocates. When the operation is completed the tool is withdrawn from the stone by the hand-wheel.

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