Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Work or object holding type
Patent
1975-08-22
1976-10-05
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Work or object holding type
335294, H01F 720
Patent
active
039847969
ABSTRACT:
An electro-magnet or chuck for lifting scrap metallic particles, comprising a housing essentially of magnetic material. Enclosed are a plurality of spirally wound, superposed coils. Each coil has a central portion which is wound as a bimetal, that is, one winding having magnetic properties, such as an iron winding, and the other, non-magnetic, such as an aluminum winding in series with an outer winding portion of non-magnetic turns. The housing has an annular bottom portion of durable non-magnetic material, such as stainless steel, which is magnetically bridged by scrap magnetic particles being lifted.
REFERENCES:
patent: 2761094 (1956-08-01), Frampton
patent: 3521209 (1970-07-01), Fritz
patent: 3693126 (1972-09-01), Rybak
patent: 3763453 (1973-10-01), Schurr
Harris George
Ruano William J.
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