Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1982-09-30
1984-01-17
Eisenzopf, Reinhard J.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
335288, H01F 1300
Patent
active
044266723
ABSTRACT:
Continuous demagnetizing for a dial feeder grinder. The grinder has a rotating table, and a plurality of grinding heads for successively grinding workpieces put on the table and carried therepast. The workpieces are held on the table by a magnetic chuck, and to remove them, they must be demagnetized. The chuck is made up of wedge shape segments, and those segments are magnetized and demagnetized, in a rotation of the table, in putting the workpieces on, and removing them from, the table, both these steps being performed in a single rotation of the table. The magnetism of the chuck segments is controlled by collector rings arranged in sections around the table, and the chuck is provided with brushes engaging the collector ring segments for sequentially energizing the chuck segments, and, in conjunction therewith, controlling the demagnetizing steps.
REFERENCES:
patent: 3579053 (1971-05-01), Littwin
patent: 3729658 (1973-04-01), Voitov
Eisenzopf Reinhard J.
Electro-Matic Products Co.
Gallagher Paul H.
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