Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1974-07-15
1976-02-24
Queisser, Richard C.
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73362AR, 307117, 323 19, 323 24, G01K 1500, G05F 1116
Patent
active
039396878
ABSTRACT:
A temperature calibration system including a well for receiving a temperature sensor such as a thermometer or thermocouple, and a heater for heating the well to a desired and adjustable temperature. A single well instrument providing a temperature range of 100.degree. to 1199 .degree. F in one degree steps. A control circuit for controlling well temperature to a few tenths of a degree and including means for manually setting the desired temperature, a bridge incorporating the temperature sensor and the temperature setting resistances, amplifiers for switching power to the well heater, and a null meter for indicating when the instrument is operating at the desired temperature.
REFERENCES:
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patent: 3334814 (1967-08-01), Bray et al.
patent: 3584291 (1971-06-01), Budniak et al.
patent: 3633094 (1972-01-01), Clements
patent: 3699800 (1972-10-01), Waldron
patent: 3738174 (1973-06-01), Waldron
(S0099-0018) Hambley, N. "A Solid State Process Controller." In LABP 18-79 Apparatus and Devices, Vol. 18, No. 8. pp. 847-850.
Brookmire, J. L. Zero "Voltage Switching for Proportional Temperature Control," In EEE Circuit Design Engineering, Vol. 15, No. 4, pp. 97-99, Apr. 1967. TK-7800-E52.
King Nutronics Corporation
Queisser Richard C.
Shoon Frederick
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