Abstract: A reservoir is provided for a hydraulic dampening chamber at the end of a spool valve with a snap on cap having a labyrinth or baffled fluid entry passage formed in the closed end of the cap.

Abstract: A reservoir is provided for a hydraulic dampening chamber at the end of a spool valve with a snap on cap having a labyrinth or baffled fluid entry passage formed in the closed end of the cap.

Abstract: Feedback and associated electronic control circuitry are eliminated in a battery charger incorporating a ferroresonant transformer for providing a constant current to a charging battery as typically required such as during the final hours of charging. The ferroresonant transformer includes an input primary winding, an output secondary winding, and a regulating winding in combination with a tuned reactor for maintaining transformer minimum output current constant, the precise value of which can be established by transformer and tuned reactor values as well as the value of a resonating capacitor. As the battery approaches full charge and the charger's current approaches minimum value, the charger's output voltage automatically is adjusted to maintain the selected current. The battery's state of charge which dictates the load on the charger changes the amount of energy flowing in the tuned reactor and regulating winding.