Abstract: A single-pole electrical connector includes an insulating sleeve and a retention ring positioned in the insulating sleeve. The retention ring defines an inner channel and a groove in a surface of the inner channel. The retention ring also includes a threaded hole intersecting the groove. A screw positioned in the threaded hole blocks the groove when in an extended position and leaves the groove unblocked when in a retracted position. A contact positioned in the inner channel includes a drive pin positioned in the groove. The contact is secured within the insulating sleeve when the screw is in the extended position and movable relative to the insulating sleeve when the screw is in the retracted position.

Abstract: A coupler for connecting a first element to a second element includes a first connector piece securable to the first element; a second connector piece for attaching to the first connector piece; and a flexible breakaway device mounted on the second element for releasably securing the second connector piece to the second element. A method of connecting and disconnecting a first element and a second element includes the steps of providing a first connector piece on the first element; attaching a breakaway device to the second element; attaching a second connector piece to the breakaway device that is attached to the second element; securing the first connector to the second connector; releasing the second connector piece from the second element by deflecting a portion of the breakaway device when a separation force is applied between the first and second elements.