Detecting a rapid change of a critical physical condition

Details Detecting a rapid change of a critical physical condition Detecting a rapid change of a critical physical condition

1983-05-26

1985-09-24

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

340650, 340661, G08B 1706

Patent

active

045435707

ABSTRACT:
Instead of monitoring a thermal deburring operation by reference to whether a certain high temperature is reached and thereby indicting whether a successful ignition in the deburring chamber has taken place at every step of operation of the chamber, a circuit responsive to the rate of change of temperature is used to recognize a successful operation, thus permitting faster operation of the apparatus. Such a circuit is also useful for rapid detection of a short circuit circuit in electrochemical apparatus utilizing heavy electrical currents and variable amounts. In the latter case a digital circuit for measuring the amount of change at equal intervals of time is particularly useful.

REFERENCES:
patent: 3594557 (1971-07-01), Anderson
patent: 3728615 (1973-04-01), Hill et al.
patent: 4099165 (1978-07-01), Botnen
patent: 4266220 (1981-05-01), Malinowski
patent: 4445090 (1984-04-01), Melocik
patent: 4454557 (1984-06-01), Hurley

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