Deroyal Industries, Inc.

Allen V Blalock

Benny Tanhehco

Mark Justice

According to the present invention, a temperature controlled therapy device is provided which maintains a desired temperature in a fluid. The temperature controlled therapy device includes a fluid reservoir, a temperature controlled fluid, a watertight blanket having an internal space located therewith, a conduit connected between an exit port of the reservoir and an entry port of the blanket and between an exit port of the blanket and an entry port of the reservoir for defining a fluid circuit within which the temperature controlled fluid may circulate, a pump for circulating the temperature controlled fluid through the fluid circuit, a differential temperature sensor for generating an output signal proportional to a difference in fluid temperature in the blanket and a temperature at a remote location, an absolute temperature sensor for generating an output signal proportional to the temperature at the remote location, a control circuit having as inputs the outputs of the differential temperature sensor and the absolute temperature sensor for generating a control signal for operating the pump in order to maintain a defined temperature range in the fluid in the blanket, and a power supply for supplying power to the device.

Temperature controlled fluid therapy system

An apparatus is disclosed which adapts the output signal of a thermocouple temperature sensor to be electrically the same as the output signal of a thermistor temperature sensor. The disclosed apparatus, which consists of a conversion circuit, a translation circuit, and an output control circuit, makes the thermocouple temperature sensor compatible with a temperature measuring instrument which is designed for use with a thermistor temperature sensor. The conversion circuit converts the small electrical voltage produced by a thermocouple temperature sensor into a substantial electrical voltage representing the temperature at the location of the thermocouple temperature sensor. The translation circuit translates the electrical voltage at the output of the conversion circuit into an analog electrical signal which is proportional to an electrical voltage that would exist across the terminals of a thermistor temperature sensor exposed to the same temperature as the thermocouple temperature sensor. The output control circuit produces an output voltage at the output terminals of the apparatus which varies as a function of the electrical signal at the output of the translation circuit. This output voltage is equivalent to the electrical voltage which would exist across the terminals of a thermistor temperature sensor if the thermistor temperature sensor was connected to the temperature measuring instrument's input and was exposed to the same temperature as the thermocouple temperature sensor.

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Knoxville, TN, United States of America

Allen V Blalock