ADSS cable is laid out a length of cable along an aerial route defined by a series of poles, and loops of surplus cable are formed at occasional poles. A cardiac stimulator includes a defibrillation circuit that uses a pulse width modulated capacitive discharge to generate various biphasic waveforms, one or more of which may be delivered to the heart to treat the fibrillation. The selecting disks are rotatably connected to the base along the axis of the base. More particularly, the system and method relate to discriminating between images by accounting for the orientation of the image. The spiral torsion spring may be anchored to a frame along one end that is substantially parallel to the center axis of the spiral torsion spring, and may be unrolled into a substantially unrolled state so as to cover an aperture in the frame.