An electrical connector incorporates a plug shell, a receptacle shell, a coupling nut for releasably interconnecting the plug shell together with the receptacle shell, and means for selectively impeding the coupling nut from being rotated in its decoupling direction. The latter means takes the form of...http://www.google.com.au/patents/US3971614?utm_source=gb-gplus-sharePatent US3971614 - Electrical connector with means for maintaining a connected condition
