US PATENT SUBCLASS 96 / 18
.~ With control means responsive to sensed condition

Current as of: June, 1999
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96 /   HD   GAS SEPARATION: APPARATUS

15  DF  ELECTRIC FIELD SEPARATION APPARATUS (E.G., ELECTRICAL PRECIPITATOR, ELECTROSTATIC TYPE, ETC.) {17}
18.~ With control means responsive to sensed condition {4}
19  DF  .~.~> Concentration or temperature sensing means
20  DF  .~.~> Arc, spark, or flashover sensing means {1}
22  DF  .~.~> Current sensing means {1}
24  DF  .~.~> Voltage sensing means

DEFINITION

Classification: 96/18

With control means responsive to sensed condition:

(under subclass 15) Apparatus in which means are provided to detect an apparatus or a process characteristic or change therein and to control or regulate operation of the apparatus or process based on the detected characteristic or change therein.

(1) Note. In this subclass and the subclasses indented hereunder, a single means may be used both to detect the characteristic or a change therein and to implement an action in the apparatus based upon the detected characteristic or change therein. There must be a positive action made by the apparatus because of the detected characteristic or change therein. An example is a pressure relief valve in which a certain pressure must be reached before the valve opens to relieve pressure differential across the valve. Another example is a thermostat with a bimetallic element in which a certain temperature must be reached before the element is deformed enough to trip a switch, thus implementing a control action in the apparatus as a result of the temperature or change therein. Apparatus in which no positive action is made by the single means as a result of the detected characteristic or change therein is not classified in this subclass or in the subclasses indented hereunder, but is classified below. An example of such means would be an ammeter for recording spikes in electric current to denote sparking events, but without means for implementing any reaction in the apparatus (e.g., to reduce electrode voltage, etc.) as a result of such current spikes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

25, for electric field separation apparatus with programmed, cyclic, or time responsive control means not responsive to a sensed condition.

26, for electric field separation apparatus with measuring, indicating, signal, or alarm means.

30+, for electric field separation apparatus with cleaner and interrelated shutdown or voltage adjustment means.

80+, for electric field separation apparatus with voltage supply or circuitry which is not specifically used to control operation of the apparatus.

102, for chromatography type apparatus with control means responsive to sensed condition. 109+, for solid sorbent apparatus with control means

responsive to sensed condition.

156+, for apparatus degasifying liquid with control means responsive to sensed condition.

397+, for gas separation apparatus with automatic control means for gas or nongaseous constituent discharge and subclasses 417+ for gas separation apparatus with signals, indicators, measuring, or testing means.

SEE OR SEARCH CLASS

95, Gas Separation: Processes,

2+, for electric field separation processes with control responsive to sensed condition, subclass 25 for processes with recording or signaling condition, and subclass 26 for processes with timing of operation.

340, Communications: Electrical,

500+, for automatic electrical condition responsive indicating systems; particularly subclasses 632+ for gas responsive devices.