Abstract: A resettable circuit interrupter in a ground fault detector circuit utilizes a housing which slideably retains a solenoid coil wound on a bobbin. A contact carrier is attached to the bobbin and one or more moveable contacts are provided on the carrier opposite a corresponding set of fixed contacts. A plunger slides through a central passageway in the solenoid coil. The bobbin is spring biased so that the contacts are in a normally open position. In a manually resettable version, when the solenoid coil conducts a predetermined current, manually activating the plunger causes the plunger to magnetically couple to a footplate attached to the bobbin. When a plunger spring returns the plunger to its original position, the bobbin and contact carrier move with it and the contacts are closed. When the solenoid coil conducts insufficient current to magnetically couple the plunger and footplate, the bias springs maintain the contacts in the normally open position.

Abstract: Apparatus and a method for food processing wherein an AC electrical current at a frequency exceeding mains frequencies is caused to pass through a food product producing direct resistance heating of the food product, the frequency being selected to preclude substantial electrolysis of the food product.

Abstract: A method of surgically implanting a human knee prosthesis is provided where (i) the postoperative ratio of the adjusted patellar tendon length to the prosthetic patellar height (APL/PH') is from about 1.2 to about 0.9; and (ii) the tibial component of the knee prosthesis is implanted so that the postoperative anterior/posterior center line of the tibial component is located posterior with respect to the preoperative anterior/posterior center line of the tibial plateau by an amount equal to or greater than about 5% of the anterior/posterior distance of the tibial plateau. An implanted prosthetic human knee joint is also provided having either or both the normalized APL/PH' ratio or the 5% posterior placement.