(under subclass 307) Systems, wherein the regulating means is responsive to a thermal condition.
(1) Note. The thermal condition may be, for example, (1) the heat generated by the current in the load device circuit flowing through an impedance, or (2) the heat generated by the load device, or (3) the temperature of the atmosphere in which the load device is operating.
(2) Note. This subclass includes ballast resistance devices placed in the circuit of the load device.
SEE OR SEARCH CLASS
323, Electricity: Power Supply or Regulation Systems,
236, and 245, for automatically controlled systems for controlling the magnitude of the current and/or voltage in a single circuit by means of an impedance which is responsive to a thermal condition.
