Abstract: A plural battery control apparatus having a three-position switch for selectively connecting a pair of batteries singly, in parallel or in series to a current load or source via an electrical output connector. Means are also provided for monitoring the voltage condition of the first and second batteries.

Abstract: A live well valve apparatus having a valve body forming a ball member compartment and a stab joint conduit with flowthrough communication therebetween. A ball member is disposed in the ball compartment and positionable in moving clearance and in sealing engagement with a valve seat disposed between the ball member compartment and the stab joint conduit. A wedge means is provided to selectively force the ball member in sealing engagement with the valve seat, the wedge assembly in the preferred embodiment being an actuator bar slidingly supported on the valve body in opposingly aligned bar supporting grooves, the actuator bar having a clearance end and a wedge end.