Patent ID: 6837845
Filing Date: 2005-01-04
Classification: G01K

Abstract:
1. An infant apparatus for providing heat to an infant, said infant apparatus comprising: a base for supporting an infant, a heater mounted with respect to said base and adapted to direct infrared energy toward an infant supported on said base, a temperature sensor adapted to be affixed to an infant to sense the temperature of an infant and a temperature display adapted to read out the temperature sensed by said temperature sensor, said infant apparatus further having an automatic calibration system comprising: an electrical circuit adapted to receive the signal from the temperature sensor and to provide a output signal to said temperature display to display the temperature of said temperature sensor, means to input at least two different predetermined voltage signals to said electrical circuit, means to determine the output signals from said electrical circuit when each of said at least two voltage signals are inputted to said electrical circuit, means to calculate the offset and span constants for said electrical circuit by using said output signals from said electrical circuit and said input voltage signals corresponding thereto, and using said calculated constants to calibrate said electrical circuit.