Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1987-09-30
1988-09-27
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335 78, 335234, H01F 708
Patent
active
047744855
ABSTRACT:
The magnetic drive of an electromagnetic contactor comprises two spaced coils (10,11) having a coaxial bore in which an armature (14) is mounted for reciprocal movement between two end positions. A control slider (21) is disposed between the coils (10,11) with its two sides forming stops for the armature (14). When the armature (14) is changed over from one to the other end position, the slider is also changed over and limits, at the mid-position, the return movement of the armature (14) from the respective end position. In a contactor designed for tri-stable operation, undesired movement of the armature beyond the mid-position is avoided, which could otherwise lead to an inadvertent change-over of the armature (14) to the other end position. If the contactor is designed for monostable mid-position operation, oscillation of the armature (14) about the mid-position is prevented, so that this mid-position is stabilized.
REFERENCES:
patent: 3070730 (1962-12-01), Gray et al.
patent: 3859547 (1975-01-01), Massie
patent: 4490701 (1984-12-01), Dietrich et al.
patent: 4533890 (1985-08-01), Patel
Harris George
Klockner-Moeller Elektrizitats-GmbH
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