Electromagnetic lifting device

Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Work or object holding type

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Details

294 655, H01F 706, B66C 106

Patent

active

041852613

ABSTRACT:
An electromagnetic lifting device comprising a plurality of electromagnets having a variety of individual magnetic pole face areas and an inverted generally U- or W-shape connected with each other and further rigidly connected to a suspension member, and specifically adapted to electromagnetically lift up only a single sheet of ferromagnetic metal sheet by energizing a selected one or plurality of the electromagnets to an extent of necessary and enough electromagnetic energy in accordance with a thickness of the single sheet of metal and exerting thus-produced electromagnetic force to that single sheet of metal so that only that single sheet of metal can be lifted upwardly away from a pile of such metal sheets.

REFERENCES:
patent: 675323 (1901-05-01), Clark
patent: 777221 (1904-12-01), Piek
patent: 1232532 (1917-07-01), Griffith
patent: 1316672 (1919-09-01), Bethke
patent: 3298730 (1967-01-01), Soley

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