(under the class definition) Devices having envelopes and having a separable casing or jacket surrounding the envelope or a portion thereof.
(1) Note. This subclass is the residual subclass providing for lamps and discharge devices which have an envelope and a separable casing or jacket surrounding the envelope or a portion thereof and which are not provided for in specific subclasses above. This subclass contains cross-references of lamps and discharge devices classified in the preceding subclasses which do not specifically provide for the combination of a lamp or discharge device with an envelope having a casing therefor. The structures of envelopes in combination with a casing therefor are classified in other classes as set forth in the class definition. Accordingly the cross-references are placed in this subclass of lamps and discharge devices which have envelopes and a casing therefor only when there is some significance in the fact that the device enclosed within the envelope is a lamp or discharge device. To complete the search for this subject matter the specific subclasses referred to in the notes below must be searched.
(2) Note. This subclass does not provide for lamps or discharge devices which have an integral double wall envelope. For this excluded subject matter see subclasses 317+ below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
17+, where the lamp or discharge device is provided with an envelope and has a casing or jacket for the envelope, the space between the casing and the envelope being designed to contain either a heat transfer medium, a heat insulating medium or to be evacuated.
317+, for envelopes which have double spaced walls. See (2) Note, above. 324, for devices under the class definition which do not have an envelope but which are provided with a casing or jacket which is not gas tight and which wholly or partially surrounds the device.
