The switchable lightning-arrester system has a safety-switchable connector (10), which, for differing power-line features, can include optionally a counter-lever safety connector (14), a slide safety connector (40), a hinged safety connector (56) and a pivot safety connector (67) intermediate a power...http://www.google.es/patents/US7245473?utm_source=gb-gplus-sharePatente US7245473 - Switchable lightning arrester system
