Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1977-02-14
1977-11-01
Goldstein, Herbert
Measuring and testing
Gas analysis
Moisture content or vapor pressure
73359R, 204164, 204177, 250531, G01K 108, B01K 100
Patent
active
040560074
ABSTRACT:
Short-circuit prevention is provided in an arrangement for measuring temperatures of workpieces to be nitrided. An electrical potential gradient is established between a workpiece and a container in which the workpiece is accommodated so as to heat the workpiece and concomitantly produce in the circumambient region of the workpiece a corona discharge field of ionized particles. In order to measure the temperature of the workpiece, a heat sensor is mounted in the workpiece and extends along a path from the workpiece through the field of particles in the circumambient region and thereupon to the exterior of the container. Due to the presence of the heat sensor in the field, metal particles spattered from the workpiece tend to deposit themselves along the heat sensor. In time, a continuous electrically-conductive path would form intermediate the container and the workpiece which would result in short-circuiting between the former and the latter and thus would lead to the discontinuance of the electrical potential gradient. The invention provides a short-circuit prevention system which prevents desposition of the particles at selected portions of the path so as to avoid any possibility of discontinuance of the electrical potential gradient.
REFERENCES:
patent: 3308049 (1967-03-01), Jones et al.
patent: 3536602 (1970-10-01), Jones et al.
patent: 3863074 (1975-01-01), O'Hanlon et al.
Goldstein Herbert
Ionit Anstalt Bernhard Berghaus
Striker Michael J.
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