| 摘要 |
FIELD: engines and pumps. ^ SUBSTANCE: hoist comprises several solenoids assembled serially inside of which a flexible element runs; the said element contains alternating portions of two types of permeance, that is permanent magnets and diamagnetics. When electrical power is supplied to a corresponding solenoid the permanent magnet is drawn inside the solenoid and moves the flexible element. Magnetically operated sealed switches control power supply to solenoids; the said switches are beyond magnetic fields of solenoids and are locked with permanent magnets of the flexible element. ^ EFFECT: increased reliability of a hoist due to exclusion of mechanical components under load prone to wear. ^ 7 cl, 1 dwg
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