Demagnetizers for demagnetizing ferrous metal objects; Demagnetizers for medical instruments ; Demagnetizers for magnetic tapes; and Electronic control circuits for demagnetizing magnetic chucks

Rheostat for Regulating Voltages Applied to Windings of Magnetic Chucks Combined with Mechanism for Demagnetizing the Chucks and Work Pieces Following Grinding or Other Machine Tool Operations on the Work Pieces