Abrading apparatus having zero reference sensing means

Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof


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51157, 5116575, 5116577, 5116592, 219 69S, B24B 1900




An abrading apparatus for shaping electric discharge machining electrodes wherein an abrading die is provided with a thin coating of electrically conductive material. The conductive coating and the electrode workpiece are electrically coupled to a switching means to provide a zero reference output signal when the die and workpiece are first driven into contact with one another.

patent: 2947121 (1960-08-01), Coes
patent: 3494079 (1970-02-01), Klein
patent: 3748427 (1973-07-01), Baldwin
patent: 3905161 (1975-09-01), Tomita et al.
patent: 4186527 (1980-02-01), Hausermann et al.


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