Boots – shoes – and leggings
Patent
1982-10-20
1986-02-18
Krass, Errol A.
Boots, shoes, and leggings
324 51, 340652, 364550, G01R 3102
Patent
active
045716897
ABSTRACT:
An automated multiple thermocouple testing device determines short and open circuits in a thermocouple system. The thermocouple system has a plurality of temperature probes, each probe has a first thermocouple and a second thermocouple. The device applies a direct current voltage to the first thermocouple to cause heating in the second thermocouple and then reads the temperature response of the second thermocouple. The first thermocouples have a common lead and the second thermocouples are connected in two parallel groups. The temperature output of the second thermocouple is digitized and read by a computer. These readings are compared to criteria which determines if there is an open circuit. Before the open circuit test is applied, the device also determines which thermocouple probe has a possible short circuit. This device can automatically test for short and open circuits in a thermocouple system within a few minutes without the necessity of removing the probes from their installed position. This device was adapted to preform the above testing on a F100 fan turbine inlet temperature (FTIT) system.
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Hildebrand James R.
Sobanski Kurt J.
Collier Stanton E.
Cosimano Edward R.
Krass Errol A.
Singer Donald J.
The United States of America as represented by the Secretary of
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