Tubes with more than one discharge path; Multiple tubes, e.g. double diode, triode-hexode

Introduced: September 1968

Title

Titles differ between systems:

IPC: Tubes with more than one discharge path; Multiple tubes, e.g. double diode or triode-hexode

CPC: Tubes with more than one discharge path; Multiple tubes, e.g. double diode, triode-hexode

Full Title

Full titles differ between systems:

IPC:

Vacuum tubes > Tubes with more than one discharge path; Multiple tubes, e.g. double diode or triode-hexode

CPC:

Vacuum tubes (H01J25/00, H01J31/00 - H01J40/00, H01J43/00, H01J47/00, H01J49/00 take precedence; details of vacuum tubes H01J19/00) > Tubes with more than one discharge path; Multiple tubes, e.g. double diode, triode-hexode

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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H01J 21/22 with movable electrode or electrodes IPC+CPC Available in IPC and CPC
H01J 21/24 with variable amplification factor IPC+CPC Available in IPC and CPC
H01J 21/26 with means for concentrating the electron stream IPC+CPC Available in IPC and CPC