Abstract: An automatic force generating and control system that automatically sets exercise forces in accordance with user programmed criteria and is capable of providing pressurized flow to both ends of the arm hydraulics and leg exerciser hydraulics. Anticavitation is provided during idling, pressurized flow and when the user is successfully overcoming the pressurized flow. In the preferred embodiment, pressure is regulated by two proportional pressure relief valves which set the pilot pressure of the control valves and switching elements which direct the pressurized flow to the hydraulics. In an alternate embodiment pressure and flow are regulated by a bi-directional pump through the current and voltage sent to the pump by the controls. In a third embodiment the pressure is regulated by a proportional pressure relief valve which is connected in parallel to the ends of either the arm cylinders and to a uni-directional pump.

Abstract: An automatic force generating and control system that automatically sets exercise forces in accordance with user programmed criteria and is capable of providing pressurized flow to both ends of the arm hydraulics and leg exerciser hydraulics. Anticavitation is provided during idling, pressurized flow and when the user is successfully overcoming the pressurized flow. In the preferred embodiment, pressure is regulated by two proportional pressure relief valves which set the pilot pressure of the control valves and switching elements which direct the pressurized flow to the hydraulics. In an alternate embodiment pressure and flow are regulated by a bi-directional pump through the current and voltage sent to the pump by the controls. In a third embodiment the pressure is regulated by a proportional pressure relief valve which is connected in parallel to the ends of either the arm cylinders and to a uni-directional pump.

Abstract: An automatic force generating and control system including a lever pivotally attached to a monolith and a lower body exerciser pivotally attached to a bench, with both the bench and monolith attached to a platform. The rotation of the lower body exerciser is translated into linear movement by a series of sprockets and timing belts. The electrical output from load cells and potentiometers are processed by the electronic controls to determine the speed, direction and position and the amount and direction of force being exerted on the lever and lower body exerciser. Resistance to movement is provided by a lever hydraulics assembly and a lower body hydraulics assembly. The lever has arms and handles which articulate to the physique of the user and the exercise to be performed. The arms pivot in mirror relationship and the lower body exerciser may be lengthened or shortened. Electric solenoid clutches or hydraulics may engage the handles to the arms and the arms to the head of the lever.

Abstract: A method and apparatus for controlling motion of power driven mechanisms in a medical x-ray spot filming system in order to minimize induced vibrations of x-ray film due to acceleration and deceleration of the power driven mechanisms. The invention includes a method and apparatus for establishing a desired profile of position of the x-ray associated mechanisms as a function of time and for implementing a move of the mechanism in accordance with the desired profile. In one form the profile is divided into a plurality of equal time increments and the motion of the mechanism is computed for each time increment as a function of a particular change in position such that a move can be completed within a fixed time interval. Depending upon the length of the move, a change in position for each time increment is determined and the mechanism is moved in accordance with the computed position change for each time increment.

Abstract: A conveyor belt cleaner mounted on a transverse support member including an arm extending from a mounting bracket and a belt cleaner blade secured on the arm. A positioning arrangement is provided between the arm and the cleaner blade to allow the blade to rotate about the central axis of the arm within predetermined limits in either direction so as to allow the scraping edge of the cleaner blade to align with the surface of the conveyor belt being cleaned. A nut and a resilient washer are provided to secure the blade against a collar. An alternative securement includes a pin-and-slot connection which allows the same rotative action of the blade relative to the arm and having multiple seals against the entrance of dirt into the connection.