(under the class definition) Oscillators provided with a casing or housing to enclose the oscillator.
(1) Note. The function of the casing or housing surrounding the oscillator in the patents in this subclass is to provide primarily for the mechanical protection or for the control of the physical environment of the enclosed oscillator.
(2) Note. The casing or housing includes at least the oscillator system and may or may not include the power supply or biasing sources for the oscillator.
(3) Note. If the casing or housing is claimed as an electric, magnetic, or electro-magnetic shield or screen the patent is excluded.
(4) Note. The casing or housing in this subclass must be independent of the oscillator. For example, if the oscillator is enclosed by one of its own components (such as its resonator) classification is with the particular oscillator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
67, for oscillators with electromagnetic or electrostatic shield. See (3) Note above.
79+, for beam tube oscillators wherein the frequency determining structure (i.e., resonator or slow wave structure) is enclosed by the tube envelop.
86+, for magnetically controlled space discharge device oscillators (e.g., magnetron) wherein the frequency determining network of the oscillator is enclosed by the tube envelope.
97+, for oscillators wherein the active element is enclosed by a distributed parameter resonator. See (4) Note above.
SEE OR SEARCH CLASS
174, Electricity: Conductors and Insulators, for miscellaneous casings and housings for electrical devices and including the combination of the casing or housing with the electrical device recited by name only, particularly
8+, for such devices intended to be used with a fluid or vacuum and subclasses 50+ for such devices of general utility. See the search notes to the class definition of Class 174 and to subclasses 8 and 50 and under "SEARCH CLASS" thereunder as to other fields of search for particular electrical devices with housings.
