(under the class definition) Systems wherein the load device
is of the type which operates in a confined atmosphere of gas or vapor and includes (1) means for evacuating the gas or vapor, and/or (2) means for admitting gas or vapor into the interior of the enclosure of the load device, the system including means to cause such pressure regulating means to become operative when the gas pressure deviates from normal.
SEE OR SEARCH CLASS
53, Package Making,
79+, and 403+ for methods of and apparatus for gas filling and/or evacuating of lamps or discharge devices combined with closing.
141, Fluent Material Handling, With Receiver or Receiver Coacting Means,
4, 8, and 65+ for methods of and apparatus for inducing a gas or vapor into or evacuating the envelope of an electric lamp or space discharge device. 250, Radiant Energy,
281+, for methods and apparatus for the ionic separation or analysis of materials utilizing the mass to electric charge ratio of ionic particles of the material.
313, Electric Lamp and Discharge Devices,
7, for the structure of an electric lamp or discharge device which has combined therewith an evacuating pump designed to be used during the operation of the lamp or discharge device (as distinguished from such a combination designed only for use during the manufacture of the lamp or discharge device) and subclasses 545 to 566 for lamp and discharge device structures which are provided with a getter, a gas or vapor generating means or other pressure regulating means.
378, X-Ray or Gamma Ray Systems or Devices,
123, for X-ray tubes with vacuum control means.
445, Electric Lamp or Space Discharge Component or Device Manufacturing,
9+, for processes of generating a gas or vapor from a material within the envelope of an electric lamp or discharge device and subclass 55 and the subclasses specified in the notes to the definitions of those subclasses for processes of gettering electric lamps or discharge devices.
