.~ Filament or electric heater in series with a discharge device load
DEFINITION
Classification: 315/49
(under subclass 32) Subject matter wherein the load device is a discharge device having structurally combined therewith a filament or an electric heater, the filament or heater being connected in electrical series with the discharge electrodes of the discharge device.
(1) Note. The filament or heater may be the cathode element or the cathode heater element of the discharge device.
(2) Note. In some of the devices in this subclass, the filament is designed to emit light while the discharge device is operating. This subclass therefore includes combined discharge lamps and incandescent lamps where the lamp filament is connected in series with the discharge electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
46, for discharge devices having a filament or electric heater connected in electrical shunt relation with the discharge device load.
58, and indented subclasses, for a mere resistance having no other function even though in electrical series relation with the discharge electrodes.
94, and indented subclasses for systems wherein a discharge device load is provided with a cathode made of resistance material or having the cathode heated by an electric resistance heater, and the system includes means to supply electric current to the cathode or heater. 115, and indented subclass for systems under the class definition wherein the load device is provided with an electric heater for heating the load device and the system includes means to supply electric current to the heater.
179, and indented subclasses for miscellaneous systems under the class definition having a plurality of diverse type load devices electrically connected in series in the system.
SEE OR SEARCH CLASS
313, Electric Lamp and Discharge Devices,
1+, for the structural combination of a discharge device and an incandescent lamp which are combined so as to form a unitary device where the incandescent lamp filament is not connected either in shunt or in series with the discharge electrodes, subclasses 15+ for discharge devices which are provided with an electric resistance heater for the discharge device which is not connected either in shunt or in series with the discharge electrodes and subclass 310 and the subclasses specified in the Notes thereto, for discharge devices having an indirectly heated cathode, the cathode heater element not being connected either in shunt or in series with the discharge electrodes.
