Abstract: In a method and device for monitoring the operation of a motor, the current drawn by the motor is sensed a preselected time after a peak of current is sensed. This sensed current is then compared to both a minimum and a maximum current threshold value to determine whether the sensed current is inside or outside the range of currents defined by the minimum and maximum current threshold values. The minimum and/or maximum current threshold values are dynamically adjusted as a function of the comparison.

Abstract: A transformer and associated rectifier for supplying low voltage (e.g. 5 volts), high current (e.g. 1,500 amperes) power to a load such as a supercomputer, with a high electrical conversion efficiency and a high volumetric efficiency. The primary winding comprises a number of disc-shaped coils which are spaced apart from each other by coaxial single turn secondary coil elements which are interleaved between the primary coils. A core having E-shaped parts has an inner portion extending through the primary and secondary coils and an outer portion forming two windows with the inner portion, so that the coils extend through the windows. A rectifier assembly is mounted directly to plates which support and act as terminals to the secondary coils.

Abstract: The disclosure is directed to a device for monitoring the thermodynamic state of a fluid flowing through a conduit. The device generally comprises a first electromechanical transducer acoustically coupled to the conduit, electronic drive means connected to the first electromechanical transducer to provide a driving electrical signal to the first electromechanical transducer whereby the first electromechanical transducer is oscillated to generate mechanical wave energy for transmission through the fluid flow, and a second electromechanical transducer acoustically coupled to the conduit and arranged in a spaced, acoustically coupled relation to the first electromechanical transducer to receive the mechanical wave energy transmitted through the fluid flow and conduit by the first electromechanical transducer and to convert the received mechanical wave energy into an electrical signal.

Abstract: A sun tracking solar energy boiler comprising a solar radiation collector and tracking assembly for collecting and focusing solar radiation upon a surface maintained precisely normal to its direction of incidence, in combination with boiler means comprising a preheat tank and steam pressure tank arrangement to maintain a predetermined water level in boiler tubes. The collector and tracking system is provided with means for tracking the sun in its hourly travel from sunrise to sunset, and means is provided for matching seasonal changes of the sun from the summer maximum height to the winter maximum dip with use of a completely automatic apparatus requiring a minimum of manual attention. Means are provided to prevent or remove any lens obscuration, and liquids other than water can be successfully used in the boiler means. Properly adjusted, the system is operable anywhere on earth with a latitude of 5 degrees or higher; special adaptation can be made for locations nearer the equator.