Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Patent
1984-07-18
1986-02-18
Frankfort, Charles
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
374183, 374 65R, G01K 716
Patent
active
045710953
ABSTRACT:
An apparatus for measuring a temperature comprises a first resistance, the resistance value of which depends on the temperature to be measured, a second resistance, a multiple switch with a plurality of inputs and an output, wherein the resistances each are connected to a corresponding input, a supply source which can be coupled with both resistances through a switch and a processing unit for controlling the switch and the multiple switch and for determining the temperature in dependence on the voltages measured at the supply source being switched on and off respectively, in the subsequent positions of the multiple switch. The output of the multiple switch is connected to an input of a voltage/frequency converter through a voltage source, an output of the voltage/frequency converter being connected to the processing unit.
REFERENCES:
patent: 2508478 (1950-05-01), Vehling
patent: 2884786 (1959-05-01), Burk et al.
patent: 2995703 (1961-08-01), Rogers
B.V. Enraf-Nonius Delft
Frankfort Charles
Scanlon Patrick R.
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