Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1978-07-03
1982-07-20
Caldwell, Sr., John W.
Communications: electrical
Condition responsive indicating system
Specific condition
340502, 340506, 340518, 340525, 340595, 340652, 340693, 340715, 374153, 374167, G01K 102, G08B 1900
Patent
active
043408869
ABSTRACT:
A system for monitoring the temperature of a plurality of bearings and motors, for example in a grain elevator, includes a plurality of sensors associated with the respective bearings and motors whose temperatures are to be monitored. A first circuit energizes a display for providing a readout of the temperature at each sensor location, and a second circuit compares the temperature at each sensor with a maximum desired temperature for its associated bearing or motor, and energizes an alarm when this desired maximum is exceeded. A third circuit drives a display indentifying the sensor being monitored by the first and second circuits. A malfunction detector circuit produces an observable indication in response to an open circuit condition at any of the sensors. The sensors each comprise a temperature sensitive diode and a matching resistor encased in a housing by a highly thermally conductive material, the housing being suitably formed to be mounted in a close thermal relationship with the motor or bearing to be monitored.
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Boldt Robert R.
Nelson Arthur R.
Caldwell Sr. John W.
Dickey-john Corporation
Nowicki Joseph E.
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