A socket assembly includes a rotor, a housing, and first and second conductors. The hanger and restrainer device includes a proximal portion mountable to a beam or the like and a specially contoured distal portion with an opening that can receive the pipe in a \u201csnap-on\u201d manner. The intermediate portion includes a first generally frustoconical-shaped portion defined by a first inner diameter proximate the proximal end of the elongated body and a second inner diameter proximate a second end thereof. The jump-instructing unit generates an instruction to cause the image display unit to display an image whose serial number differs, by a predetermined number, from that of the image being displayed by the image display unit. The main fixing part is coupled to the second end of the first connecting part and has a first notch.