using spring-loaded pivoted inertia member

Full Title

Details of electromagnetic relays ( electric circuit arrangements H01H47/00; details of electrically-operated selector switches H01H63/00) > Driving arrangements between movable part of magnetic circuit and contact (structurally associated with contact spring sets H01H50/58) > Mechanical means for producing a desired natural frequency of operation of the contacts, e.g. for self-interrupter > using spring-loaded pivoted inertia member