(under the class definition) Subject matter wherein the amplifying device is provided with a rotating dynamoelectric means; and wherein the power supply electrical energy source which is controlled, may be developed by conversion of mechanical energy to electrical energy by the motion of the armature of the dynamoelectric means, the signal current being applied to magnetic field means of the device, so that a current is generated which varies with the signal current supplied; or the rotating dynamoelectric means may act as a motor with the signal current applied to the rotating means or the field means, and the rotary motion of the device may be utilized as a variable resistor means to effect a control of the power supply source.
(1) Note. Subject matter, as defined above, is classified
herein where the device is disclosed as designed to amplify a signal. Where the system is primarily for the conversion of electrical energy into mechanical energy or vice versa, or is of general utility, classification is in Class 310, Electrical Generator or Motor Structure, or Class 322, Electricity: Single Generator Systems, as described in the, SEARCH CLASS, below. Where the structure of a dynamoelectric machine is claimed, alone, classification is in the appropriate subclass of Class 310, Electrical Generator or Motor Structure.
SEE OR SEARCH CLASS
310, Electrical Generator or Motor Structure,
10+, and subclasses indented thereunder for the structure of dynamoelectric machines, per se, especially indented subclasses 139 and 151 for the structure of generators of the rotary amplifier type.
322, Electricity: Single Generator Systems, appropriate subclasses particularly 61, for generators with alternating current excitation and subclasses 90 and 91+ for rotating amplifiers, especially indented subclass 92 for such amplifiers of the crossed-field type.
