Abstract: A sterilization container with a sensor module for monitoring the environmental characteristics internal to the container. The sensor module includes a normally closed end bore. A sensor is disposed in the closed end void space. Other sensors also part of the module monitor the pressure and temperature of the environment inside the container. Based on the measurements of the environment in the container and the environment within the closed end void space it is possible to determine the extent to which the container is filled with saturated steam.

Abstract: A girth measuring device for a shoe is disclosed. The portions of the device are configured to be placed inside the shoe and a measurement ribbon is moved from a retracted position to an expanded position. As the measurement ribbon expands, it eventually contacts the shoe. This contact can be sensed and information related to the girth of the shoe is available.

Abstract: A current mode zero-voltage, parallel resonant switching power supply. The disclosed power supply includes a resonant tank comprising an inductorcapacitor pair, and having a variable output level. A solid-state switch controls the energy input to the tank. A comparator compares the voltage or other signal level from the switch to a threshold level so that the switch is closed when the voltage across it equals the threshold, and opened when the current through it corresponds to the threshold level. In one embodiment the threshold is produced by an error amplifier sensing the power supply output voltage, based on the difference between the output level and a reference level. A startup circuit is provided for energizing the tank when the power supply is initially powered, or under a load dump condition.

Abstract: A circuit for monitoring and indicating the outut level of an energy source, such as the voltage level of a battery. The circuit includes a triangle wave generator, and a comparison circuit for comparing the triangle wave form to the battery output level and generating a comparison signal. A dual color LED set displays the comparison signal. The diode set is activated in one color when the battery signal is greater than the triangle wave form, while the other color diode is activated when the battery signal is less than the triangle wave form. When the frequency of the triangular wave is two Hertz, the LED set produces discernable flashes between the first color LED and the second color LED when the battery signal is within the peak-to-peak value. The ratio of the times the LEDs are activated is a linear representation of the battery voltage between predetermined "warning" and "discharge" voltages.