US PATENT SUBCLASS 318 / 129
.~.~ By means for producing periodic electrical pulses in the energizing circuit

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

119  DF  RECIPROCATING OR OSCILLATING MOTOR {4}
126  DF  .~ Energizing winding circuit control {5}
129.~.~ By means for producing periodic electrical pulses in the energizing circuit {2}
130  DF  .~.~.~> Electrical oscillation or condenser charging and/or discharging circuits
131  DF  .~.~.~> Motor or escapement-controlled means

DEFINITION

Classification: 318/129

(under subclass 126) Subject matter in which means are provided for producing a succession of electrical pulses in the energizing circuit of the winding, the periodicity of the pulses being such that the motor to which the pulses are supplied is maintained in substantially continuous motion by the succession of pulses.

(1) Note. A mere means for producing electric pulses (i.e., there being no details of structure of the means or any details of relationship between the means and the motor to which the pulses are supplied--other than the mere connection thereto) is insufficient basis for classification herein. For example, recitation by name only of the means for

producing periodic pulses such as "an a-c source", a "source of pulsations", an "oscillator", etc., does not constitute a means for producing periodic pulses which is classifiable herein.

(2) Note. Where the means for producing the pulses may or may not produce the succession of pulses, classification is not herein. For example, a manually operated circuit interrupter in the supply circuit to the motor may be operated to produce a single pulse or a succession of pulses depending on the will of the operator and is not classifiable herein. Likewise, a circuit interrupter which closes the circuit in response to a condition (such as temperature or pressure) which condition may sometimes vary to cause the circuit to be periodically interrupted, is not classified herein. However, in the latter case, if the condition response means causes electrical pulses from a source of pulsating current to be supplied to the winding, such a system would be classified herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

122+, for systems under subclass 119 which include means for periodically energizing one or more windings of a plural winding motor.

127+, for this subject matter where the system includes means responsive to predetermined conditions in or of the motor for controlling the motor, including controlling the application or the periodicity of pulses to the motor. 503, and the subclasses listed in the Search Notes thereto, for other motor control systems in which periodic pulses are supplied to the motor.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

96+, for circuit interrupting systems for regulating the average value of current flowing through an electrical circuit, and subclass 132 for intermittent circuit interruption systems, such as "flashing systems", of general application.

322, Electricity: Single Generator Systems,

69+, for systems wherein a generator field circuit is interrupted to regulate the field current.