The switching device assumes, when {HEAD ~ the first switch} of the controlling device is turned ON, a first condition wherein the first and second output parts are charged positive and negative respectively, and assumes, when the second switch of {TAIL ~ the controlling device} is turned ON, a second condition wherein the first and second output parts are charged negative and positive respectively 
The switching device assumes , when { HEAD ~ the first switch } of the controlling device is turned ON , a first condition wherein the first and second output parts are charged positive and negative respectively , and assumes , when the second switch of { TAIL ~ the controlling device } is turned ON , a second condition wherein the first and second output parts are charged negative and positive respectively
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH