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Publication of BE479515ApublicationCriticalpatent/BE479515A/xx
H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
H01H50/74—Mechanical means for producing a desired natural frequency of operation of the contacts, e.g. for self-interrupter
H01H50/76—Mechanical means for producing a desired natural frequency of operation of the contacts, e.g. for self-interrupter using reed or blade spring