(under subclass 312) Systems provided with means to start the load devices into operation one after another in sequence.
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46, and indented subclasses for devices which include a filament lamp and a discharge device structurally united in a unitary structure, the filament being connected in shunt to the discharge electrode, and the device being designed so that the filament becomes luminous before the electric discharge is established between the discharge electrodes.
65, for multiple filament load devices which have an automatically operating circuit element, such as a switch, structurally combined with the load device so as to form a unitary device, the automatically operating means substituting a second filament for the first operated filament when the first operated filament fails to operate properly.
87, and subclass 88 and indented subclasses, for systems in which a load device is operated until it fails to operate properly when automatically operated means substitute another load device for the first operated load device.
137, and indented subclasses, for systems having a plurality of load devices supplied with polyphase alternating current, the sequence of operation being determined by the phases of the alternating current. 195, where the load devices are discharge control discharge devices, and the system includes phase shifting means for controlling the discharge control means to thereby determine the sequence of operation.
211, and indented subclasses, where the system includes a distributor type periodic switch.
229, where a commutating condenser is connected to either the cathodes or the anodes of a plurality of discharge device loads so as to cause them to operate alternately.
250, and indented subclasses where the current supplied to a plurality of load devices is alternating current.
294, and indented subclasses where the sequential operation is controlled by regulating means.
313, and indented subclasses, where the sequential operation is controlled by electric switch means.
