.~.~ Shield supported by or forming part of envelope stem
DEFINITION
Classification: 313/242
(under subclass 239) Devices in which the device is enclosed within an envelope which is provided with a stem, the shield being either supported by the stem or the stem being formed so as to constitute a shield.
(1) Note. A stem is the portion of the envelope which is usually used for supporting the support wires for the electrodes and for sealing in the lead-in wires for the electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
43, for devices under the class definition which are provided with a heat transfer device or a heat shield for protecting the lead-in-seal or the stem of the envelope.
219, for discharge devices which have an envelope containing an atmosphere of gas or vapor, the discharge device including a shield which is supported by the stem or which is a part of the stem for shielding the electrode support or lead-in wire.
317+, for devices under the class definition which have an enclosing envelope.
