this transfer switch has movable contactors moving to connect a load side fixed contactor alternatively to two different current source side fixed contactors . the movable contactors are operatively connected with a control shaft moving along either inclined path of a substantially v - shaped guide groove and the current source selected by the movable contactor is determined by which inclined path of the guide groove the control shaft follows . the inclined path along which the control shaft moves is determined by the direction of the inclination of a point plate closing the inclined path by inclining to either side . the control shaft rises along either of the inclined paths of the guide groove as operatively connected with a rotating motion against a returning spring by a manual or electric operation of an operating lever . when the operating lever is in the original position , the control shaft will be positioned in the middle of the guide groove and the movable contactors will be in neutral positions . the operating lever engages a latch at the end of the rotation . this latch can be manually or electrically disengaged with the operating lever . the point plate is energized by a spring so as to normally incline in one direction . the inclining direction can be reversed manually or electrically .