(under subclass 291) Systems wherein the regulator is placed in shunt circuit to the load device so that part of the current from the source of current supply is diverted from the load device to the regulator.
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119, and indented subclasses, for systems under the class definition provided with means for automatically completing a circuit in shunt to the load device when the load device becomes (1) inoperative through failure of some part, such as the filament where the load device is a lamp, or (2) when the supply voltage becomes either too high or too low for the proper operation of the device. The shunt circuit is usually completed in the systems in subclass 119 and indented subclasses by the closing of an electric switch.
207, for systems under the class definition having a discharge device connected in shunt to the load device, the discharge device being adapted to regulate the current flow to the load device.
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323, Electricity: Power Supply or Regulation Systems,
220, 233, for systems for controlling the magnitude of the current and/or voltage in a single circuit by means of an impedance connected in shunt with the circuit.