(under subclass 11) Devices where the lamp or discharge device is provided with a hollow electrode or a hollow electrode lead conductor, means being provided to modify the temperature of the hollow portion of the electrode or the electrode lead.
(1) Note. In many of the devices in this subclass a fluid is circulated into the hollow electrode or electrode lead. See indented subclasses 31 and 32 where the hollow electrode or lead constitutes a closed path so that fluid may be circulated through the electrode or lead.
