(under subclass 289) Systems provided with an electric circuit maker and breaker or interrupter in the circuit which includes the inductance.
(1) Note. The circuit interrupter may be an electric switch or an electrolytic device or other means for making and breaking the inductance circuit.
(2) Note. In many of the systems in this subclass, the source of current supply, the inductance, and the load device, which may be a discharge device, are connected in electrical series relation when the load device is operating, and the circuit interrupter is connected so as to shunt the load device so that the source of supply and the inductance
are connected in electrical series relation when the load device is not in operative condition whereby current may flow through the inductance, the circuit interrupter when opened or placed in its second closed position then placing the load device in series with the inductance so that the high potential surge generated by the inductance when the circuit is interrupted is impressed upon the load device to initiate operation of the load device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
103, for this subject matter where the discharge device is of the type which has a thermionic cathode designed to be heated by the passage of current through it, or which has an indirectly heated cathode, the system including means to supply heating current to the cathode or cathode heater and to delay the application of discharge potential to the electrodes until the cathode has reached its operating temperature, the system also including means to apply a surge of potential to the discharge electrodes when the discharge electrodes when the discharge potential is applied to the electrodes.
209, and indented subclasses for systems having a periodic switch in the supply circuit of the load device, especially subclass 223 where a periodic switch and inductance are connected in the primary circuit of the load device current supply transformer. 263, for this subject matter where the load device is an auxiliary starting electrode discharge device and the inductance is connected in the auxiliary starting electrode circuit.
SEE OR SEARCH CLASS
361, Electricity: Electrical Systems and Devices,
268+, for the structure of transformers and inductive reactors combined with a line switch.
