Apparatus for preventing circumferential overspeeding of a grind

Details Apparatus for preventing circumferential overspeeding of a grind Apparatus for preventing circumferential overspeeding of a grind

1977-05-17

1978-05-23

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

B24B 4718

Patent

active

040903311

ABSTRACT:
An apparatus for preventing circumferential overspeeding of a grinding wheel is provided in which a first rejection pin, opposed to the circumferential surface of the grinding wheel, is linked with a second rejection pin through a link mechanism. A slide plate, guided by a cover device for covering a pulley belt connection portion, is engaged with the second rejection pin to be moved therewith radially of a first or second drive pulley being alternatively mounted on a drive motor. When the first rejection pin is manipulated from the forward end to the retraction end of a slot, prior to the mounting of a fresh grinding wheel, the slide plate moves a restraining pin provided thereon into a space to be occupied by the second drive pulley, larger than the first one, so that the fresh grinding wheel can be prevented from being driven by means of the second pulley.

REFERENCES:
patent: 2171799 (1939-09-01), Kline
patent: 3656262 (1972-04-01), Kikuchi
patent: 3673741 (1972-07-01), Korde

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