Section H: Electricity
H1 Electrical circuit elements; Magnets
- H1A
Electric cables and conductors
(20Kb) - H1B Electric
cells of the electrochemical
type (45Kb)
- H1C Stimulated-emission devices (75Kb)
- H1D
Electric discharge tubes &c (268Kb)
- H1E Piezo-electric
elements &c (17Kb)
- H1F
Electric incadesent lamps (30Kb)
- H1J Turret machines
for lamps &c (8Kb)
- H1K
Electric solid state devices &c (164Kb)
- H1M Capacitors
and electrets
&c (34Kb)
- H1N Electric switches &c (75Kb)
- H1P
Electromagnets, permanent magnets &c (38Kb)
- H1Q
Aerials &c (30Kb)
- H1R
Printed circuits; electrical component assemblies (24Kb)
- H1S
Ohmic resistors
&c (29Kb)
- H1T Electric transformers &c (21Kb)
- H1W
Electromagnetic waveguides &c (23Kb)
- H1X Miscellaneous
discharge appraratus (19Kb)
H2 Electric power
- H2A Dynamo-electric machines (92Kb)
- H2C
Electric and optic cable installations &c (28Kb)
- H2E
Electric couplings
&c (59Kb)
- H2F Electric converting systems (29Kb)
- H2G
Electric cut-outs (16Kb)
- H2H Electricity supply systems
&c (44Kb)
- H2J
Electric motor operating arrangements (20Kb)
- H2K Electric
protective systems (55Kb)
H3 Electronic circuits; Radio receivers
- H3A
Automatic control
of frequency and phase (20Kb)
- H3B Static magnetic
and dielectric storage
systems and devices (49Kb)
- H3F Oscillators (19Kb)
- H3G
Control of Amplification (24Kb)
- H3H Electric analogue-digital
conversation (31Kb)
- H3P
Pulse, logic and switching circuits (31Kb)
- H3Q Radio
receivers &c (55Kb)
- H3R
Modulating; demodulating; frequency changing (21Kb)
- H3T
Indexing Schedule
for amplifiers, oscillators, pulse logic and switching circuits (25Kb)
- H3U
Impedance networks &c (36Kb)
- H3W Amplifiers &c (24Kb)
- H3X
Miscellaneous circuits &c (38Kb)
H4 Telecommunications
- H4B
Optical communication (18Kb)
- H4D Wave-energy position
finding &c (162Kb)
- H4F
Pictorial communication (37Kb)
- H4J Audio transducers,
local circuits &c (44Kb)
- H4K
Telecommunication switching &c (83Kb)
- H4L Electromagnetic
and inductive
field communication (45Kb)
- H4M Electric multiplexing
techniques; distributors (24Kb)
- H4P
Electric digital data transfer; telegraphy (44Kb)
- H4R
Line transmission
systems; signal processing (36Kb)
- H4T Cathode-ray
tube circuits &c;
image signal synthesis &c (35Kb)
- H4X Sound magnifiers
&c (14Kb)