Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1985-08-19
1987-02-17
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335238, 335273, H01F 708
Patent
active
046443118
ABSTRACT:
A symmetrical monostable polarized electromagnet is provided in which a fixed permanent magnetic structure and a mobile magnetizable structure passing through the coil are dimensioned so that the starting movement from the rest position of said mobile structure for given ampere turns may be produced with certainty through adjustment of air gaps, whereas return from the working position is provided by the presence of second air gaps and/or by the action of a variable slope recall spring.
The invention reduces particularly the remanent holding effects appearing in the working position as well as the power required for supplying the coil for causing a change of state thereof when the coil is at rest.
REFERENCES:
patent: 3792390 (1974-02-01), Boyd
patent: 4319211 (1982-03-01), Ueda et al.
Guery Jean-Pierre
Olifant Jacques
Drucker William A.
Harris George
La Telemechanique Electrique
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