Control unit for selectively controlling direction of current

Claim 1

A control unit for selectively controlling the direction of current flow from said unit comprising: A. a rotatable cam shaft; B. means for rotating said shaft; C. a plurality of cam rises longitudinally positioned on said shaft and circumferentially evenly spaced thereon; D. a line of normally closed switches each adapted to be opened by a single one of said cam rises and wherein one switch of said line is always opened by a cam rise, each said switch having: i. a moveable blade adapted to be connected to a source of electricity and adapted to be moved by a cam rise to open the switch; and ii. a fixed conductor adapted to be engaged by the moveable blade when the blade is not engaged by a cam rise and the switch is closed and also to be engaged by the flexible blade of an adjacent switch in the line when said adjacent switch is closed; E. and an end conductor at each end of the line of switches connected to a lead and adapted to be engaged by a moveable blade of a switch at the end of the line; wHereby when the moveable blade of a particular switch of the line of switches is connected to a source, a circuit is completed from the source through at least one conductor to the lead at the end of the line of switches which is on the side of the blade connected to the source opposite the opened switch and whereby the circuit is maintained until the cam shaft rotates a cam rise to move the blade connected to the source to break the contact between the blade and conductor.