(under subclass 11) Devices which are provided with an envelope and where the temperature modifier is designed to modify the temperature of the envelope wall or some portion thereof.
SEE OR SEARCH THIS CLASS, SUBCLASS:
16, and 29, for devices which have a liquid electrode in contact with the envelope wall and which are provided with means to modify the temperature of the liquid electrode. See subclass 16 where the temperature modifier is an electric heater.
17+, where the device is provided with a spaced double wall envelope or is provided with a casing or jacket for the envelope, the structure including means to modify the temperature of the envelope wall.
29, see the reference to subclass 16 above. 34, where the envelope is provided with a chamber or surface for condensing vapors generated within the envelope.
35, where the envelope wall has its temperature modified by using liquids or where the temperature modifying means includes means for directing the flow of the temperature modifying fluid. 42, where the device is provided with a temperature modifying means mounted on or forming a part of the lead-in conductor or electrode support so as to prevent the transmission of heat to the envelope from the electrodes.
43, where the envelope is provided with means for protecting the lead-in seal or stem of the envelope from excessive temperatures.
