characterised by the form of the contacts, e.g. interspersed fingers or helical networks

Full Title

Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch (wherein the operating part is flexible H01H17/00) > having a plurality of operating members associated with different sets of contacts, e.g. keyboard (mounting together a plurality of independent switches H02B) > characterised by the contacts or the contact sites > characterised by the form of the contacts, e.g. interspersed fingers or helical networks