A sealing ring for clamping a watthour meter to a meter socket box includes a permanent locking mechanism mounted on the ends of a clamping band. A catch assembly includes a detent carried within a shielding enclosure on one band end. A latching assembly carried on the second band end has an extending...http://www.google.es/patents/US4149741?utm_source=gb-gplus-sharePatente US4149741 - Tamper-proof sealing ring for watthour meters
