Abstract: A supplementary DC power source is coupled to the DC link circuit of an active power line conditioner (APLC) for sustaining uninterrupted AC power to a load during the time interval needed for AC power restoration or for an alternate or a back-up AC source to be brought on line to power the load upon temporary or continued failure of an AC power source. The supplementary DC source is comprised of a rectifier circuit across which is connected a storage capacitor. A boost converter and an auctioneer diode are coupled between the storage capacitor and the DC link circuit so that when the DC link drops in voltage in response to a sag in the AC source voltage upon loss of the AC voltage source, the necessary power is provided by the storage capacitor and boost converter. A pair of fast acting switches are also coupled between the AC source and the power bus feeding the inverters to isolate the AC source from the APLC and the load upon loss of the AC source.

Abstract: Power to a load is controlled by actuation of an inductive circuit from a first condition of low inductance to a second condition of higher inductance in response to a preselected overcurrent condition. In a first preferred embodiment, the inductive circuit comprises a pair of coils electrically connectible so that magnetic fields produced by current flow in the coils oppose each other in the first condition, reducing the magnetic flux and thus the effective inductance of the circuit. The magnetic fields are either neutral to each other or reinforce each other in the second condition, giving rise to a higher inductance. Alternatively, the inductive circuit may include one or more fixed value inductors interposed between a power supply and a load in response to an overcurrent condition.

Abstract: An item is cleaned in a portable lavage device comprising a moveable tank for holding a cleansing liquid, a pump and flow restricting mechanism coupled to the tank for circulating the cleansing liquid under a pressure which gradually and cyclically varies from a maximum to a minimum pressure greater than zero to reduce noise during operation of the device, and spaced nozzles coupled to the circulating pump and flow restricting mechanism and arranged to spray the cleansing liquid under varying pressure against an item to be cleaned.This is a division of application Ser. No. 248,510, filed Mar. 27, 1981, now U.S. Pat. No. 4,402,331.

Abstract: A portable lavage device comprising a moveable tank for holding a cleansing liquid, a pump coupled to the tank for circulating the cleansing liquid under a pressure which varies from a maximum to a minimum and spaced nozzles coupled to the circulating pump and arranged to spray the cleansing liquid under varying pressure against an item to be cleaned.