H
SECTION H — ELECTRICITY
 H

Note(s)

These Notes cover the basic principles and general instructions for use of section H.

  1. Section H covers:
    1. basic electric elements, which cover all electric units and the general mechanical structure of apparatus and circuits, including the assembly of various basic elements into what are called printed circuits and also cover to a certain extent the manufacture of these elements (when not covered elsewhere);
    2. generation of electricity, which covers the generation, conversion and distribution of electricity together with the controlling of the corresponding gear;
    3. applied electricity, which covers:
      1. general utilisation techniques, viz. those of electric heating and electric lighting circuits;
      2. some special utilisation techniques, either electric or electronic in the strict sense, which are not covered by other sections of the Classification, including:
        1. electric light sources, including lasers;
        2. electric X-ray technique;
        3. electric plasma technique and the generation and acceleration of electrically charged particles or neutrons;
    4. basic electronic circuits and their control;
    5. radio or electric communication technique;
    6. the use of a specified material for the manufacture of the article or element described. In this connection, paragraphs 88 to 90 of the Guide should be referred to.
  2. In this section, the following general rules apply:
    1. Subject to the exceptions stated in I(c), above, any electric aspect or part peculiar to a particular operation, process, apparatus, object or article, classified in one of the sections of the Classification other than section H, is always classified in the subclass for that operation, process, apparatus, object or article. Where common characteristics concerning technical subjects of similar nature have been brought out at class level, the electric aspect or part is classified, in conjunction with the operation, process, apparatus, object or article, in a subclass which covers entirely the general electrical applications for the technical subject in question;
    2. The electrical applications referred to under (a), above, either general or particular, include:
      1. the therapeutic processes and apparatus, in class A61;
      2. the electric processes and apparatus used in various laboratory or industrial operations, in classes B01 and B03 and in subclass B23K;
      3. the electricity supply, electric propulsion and electric lighting of vehicles in general and of particular vehicles, in the subsection "Transporting" of section B;
      4. the electric ignition systems of internal-combustion engines, in subclass F02P, and of combustion apparatus in general, in subclass F23Q;
      5. the whole electrical part of section G, i.e. measuring devices including apparatus for measuring electric variables, checking, signalling and calculating. Electricity in that section is generally dealt with as a means and not as an end in itself;
    3. All electrical applications, both general and particular, presuppose that the "basic electricity" aspect appears in section H (see I(a) above) as regards the electric "basic elements" which they comprise. This rule is also valid for applied electricity, referred to in I(c), above, which appears in section H itself.
  3. In this section, the following special cases occur:
    1. Among the general applications covered by sections other than section H, it is worth noting that electric heating in general is covered by subclasses F24D or F24H or class F27, and that electric lighting in general is partly covered by class F21, since in section H (see I(c), above) there are places in H05B which cover the same technical subjects;
    2. In the two cases referred to under (a), above, the subclasses of section F, which deal with the respective subjects, essentially cover in the first place the whole mechanical aspect of the apparatus or devices, whereas the electrical aspect, as such, is covered by subclass H05B;
    3. In the case of lighting, this mechanical aspect should be taken to cover the material arrangement of the various electric elements, i.e., their geometrical or physical position in relation to one another; this aspect is covered by subclass F21V, the elements themselves and the primary circuits remaining in section H. The same applies to electric light sources, when combined with light sources of a different kind. These are covered by subclass H05B, whereas the physical arrangement which their combination constitutes is covered by the various subclasses of class F21;
    4. As regards heating, not only the electric elements and circuitry designs, as such, are covered by subclass H05B, but also the electric aspects of their arrangement, where these concern cases of general application; electric furnaces being considered as such. The physical disposition of the electric elements in furnaces is covered by section F. If a comparison is made with electric welding circuits, which are covered by subclass B23K in connection with welding, it can be seen that electric heating is not covered by the general rule stated in II, above.

 H03
BASIC ELECTRONIC CIRCUITRY
 H03H
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (measuring, testing G01R; arrangements for producing a reverberation or echo sound G10K 15/08; impedance networks or resonators consisting of distributed impedances, e.g. of the waveguide type, H01P; control of amplification, e.g. bandwidth control of amplifiers, H03G; tuning resonant circuits, e.g. tuning coupled resonant circuits, H03J; networks for modifying the frequency characteristics of communication systems H04B)
 H03H

Note(s)

  1. This subclass covers:
    • networks comprising lumped impedance elements;
    • networks comprising distributed impedance elements together with lumped impedance elements;
    • networks comprising electromechanical or electro-acoustic elements;
    • networks simulating reactances and comprising discharge tubes or semiconductor devices;
    • constructions of electromechanical resonators.
  2. In this subclass, the following expression is used with the meaning indicated:
    • "passive elements" means resistors, capacitors, inductors, mutual inductors, or diodes.  [3]
  3. Attention is drawn to the Notes following the titles of class B81 and subclass B81B relating to "micro-structural devices" and "micro-structural systems". [7]
  4. In this subclass, main groups with a higher number take precedence.  [3]
 H03H
Subclass index
NETWORKS
Adaptive 21/00
Using digital techniques 17/00
Transversal filters 15/00
Using passive elements only:
one port; multi-port 5/00; 7/00
Using electromechanical or electro-acoustical elements 9/00
Using active elements 11/00
Using time varying elements 19/00
Using other elements or techniques 2/00
DETAILS 1/00
MANUFACTURE 3/00
P:100 H03H 1/00
Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network (constructional details of electromechanical transducers H03H 9/00)
 H03H 1/02
·  RC networks, e.g. filters (structural combinations of capacitors with other electric elements H01G)  [3]
P:90 H03H 2/00
Networks using elements or techniques not provided for in groups H03H 3/00-H03H 21/00  [3]
P:80 H03H 3/00
Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
 H03H 3/007
·  for the manufacture of electromechanical resonators or networks  [3]
 H03H 3/013
·  ·  for obtaining desired frequency or temperature coefficient (H03H 3/04, H03H 3/10 take precedence)  [3]
 H03H 3/02
·  ·  for the manufacture of piezo-electric or electrostrictive resonators or networks (H03H 3/08 takes precedence)  [3]
 H03H 3/04
·  ·  ·  for obtaining desired frequency or temperature coefficient  [3]
 H03H 3/06
·  ·  for the manufacture of magnetostrictive resonators or networks  [3]
 H03H 3/08
·  ·  for the manufacture of resonators or networks using surface acoustic waves  [3]
 H03H 3/10
·  ·  ·  for obtaining desired frequency or temperature coefficient  [3]
P:70 H03H 5/00
One-port networks comprising only passive electrical elements as network components  [3]
 H03H 5/02
·  without voltage- or current-dependent elements
 H03H 5/10
·  ·  comprising at least one element with prescribed temperature coefficient
 H03H 5/12
·  with at least one voltage- or current-dependent element
P:60 H03H 7/00
Multiple-port networks comprising only passive electrical elements as network components (receiver input circuits H04B 1/18; networks simulating a length of communication cable H04B 3/40)  [3]
 H03H 7/01
·  Frequency selective two-port networks  [3]
 H03H 7/03
·  ·  comprising means for compensation of loss  [3]
 H03H 7/06
·  ·  including resistors (H03H 7/075, H03H 7/09, H03H 7/12, H03H 7/13 take precedence)  [3]
 H03H 7/065
·  ·  ·  Parallel T-filters  [3]
 H03H 7/07
·  ·  ·  Bridged T-filters  [3]
 H03H 7/075
·  ·  Ladder networks, e.g. electric wave filters  [3]
 H03H 7/09
·  ·  Filters comprising mutual inductance  [3]
 H03H 7/12
·  ·  Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency (H03H 7/09 takes precedence; automatic control of bandwidth in amplifiers H03G 5/16)
 H03H 7/13
·  ·  using electro-optical elements  [3]
 H03H 7/18
·  Networks for phase shifting
 H03H 7/19
·  ·  Two-port phase shifters providing a predetermined phase shift, e.g. "all-pass" filters  [3]
 H03H 7/20
·  ·  Two-port phase shifters providing an adjustable phase shift  [3]
 H03H 7/21
·  ·  providing two or more phase shifted output signals, e.g. n-phase output  [3]
 H03H 7/24
·  Frequency-independent attenuators
 H03H 7/25
·  ·  comprising an element controlled by an electric or magnetic variable (H03H 7/27 takes precedence)  [3]
 H03H 7/27
·  ·  comprising a photo-electric element  [3]
 H03H 7/30
·  Time-delay networks
 H03H 7/32
·  ·  with lumped inductance and capacitance
 H03H 7/34
·  ·  with lumped and distributed reactance
 H03H 7/38
·  Impedance-matching networks
 H03H 7/40
·  ·  Automatic matching of load impedance to source impedance
 H03H 7/42
·  Balance/unbalance networks
 H03H 7/46
·  Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source (for use in multiplex transmission systems H04J 1/00)
 H03H 7/48
·  Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source (phase shifters providing two or more output signals H03H 7/21)  [3]
 H03H 7/52
·  One-way transmission networks, i.e. unilines
 H03H 7/54
·  Modifications of networks to reduce influence of variations of temperature  [3]
P:50 H03H 9/00
Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators (manufacture of piezo-electric or magnetostrictive elements H01L 41/00; loudspeakers, microphones, gramophone pick-ups or the like H04R)
 H03H 9/02
·  Details  [3]
 H03H 9/05
·  ·  Holders; Supports  [3]
 H03H 9/08
·  ·  ·  Holders with means for regulating temperature
 H03H 9/09
·  ·  ·  Elastic or damping supports  [3]
 H03H 9/10
·  ·  ·  Mounting in enclosures
 H03H 9/12
·  ·  ·  ·  for networks with interaction of optical and acoustic waves
 H03H 9/125
·  ·  Driving means, e.g. electrodes, coils  [3]
 H03H 9/13
·  ·  ·  for networks consisting of piezo-electric or electrostrictive materials (H03H 9/145 takes precedence)  [3]
 H03H 9/135
·  ·  ·  for networks consisting of magnetostrictive materials (H03H 9/145 takes precedence)  [3]
 H03H 9/145
·  ·  ·  for networks using surface acoustic waves  [3]
 H03H 9/15
·  Constructional features of resonators consisting of piezo-electric or electrostrictive material (H03H 9/25 takes precedence)  [3]
 H03H 9/17
·  ·  having a single resonator (crystal tuning forks H03H 9/21)  [3]
 H03H 9/19
·  ·  ·  consisting of quartz  [3]
 H03H 9/205
·  ·  having multiple resonators (crystal tuning forks H03H 9/21)  [3]
 H03H 9/21
·  ·  Crystal tuning forks  [3]
 H03H 9/215
·  ·  ·  consisting of quartz  [3]
 H03H 9/22
·  Constructional features of resonators consisting of magnetostricitve material
 H03H 9/24
·  Constructional features of resonators of material which is not piezo-electric, electrostrictive, or magnetostrictive
 H03H 9/25
·  Constructional features of resonators using surface acoustic waves  [3]
 H03H 9/30 - 
H03H 9/74

Note(s)

Groups H03H 9/15-H03H 9/25 take precedence over groups H03H 9/30-H03H 9/74.   [3]

 H03H 9/30
·  Time-delay networks
 H03H 9/36
·  ·  with non-adjustable delay time (H03H 9/40, H03H 9/42 take precedence)  [3]
 H03H 9/38
·  ·  with adjustable delay time (H03H 9/40, H03H 9/42 take precedence)  [3]
 H03H 9/40
·  ·  Frequency-dependent delay lines, e.g. dispersive delay lines (H03H 9/42 takes precedence)  [3]
 H03H 9/42
·  ·  using surface acoustic waves  [3]
 H03H 9/44
·  ·  ·  Frequency-dependent delay lines, e.g. dispersive delay lines  [3]
 H03H 9/46
·  Filters (multiple-port electromechanical filters H03H 9/70)  [3]
 H03H 9/48
·  ·  Coupling means therefor  [3]
 H03H 9/50
·  ·  ·  Mechanical coupling means  [3]
 H03H 9/52
·  ·  ·  Electric coupling means  [3]
 H03H 9/54
·  ·  comprising resonators of piezo-electric or electrostrictive material (H03H 9/64 takes precedence)  [3]
 H03H 9/56
·  ·  ·  Monolithic crystal filters  [3]
 H03H 9/58
·  ·  ·  Multiple crystal filters  [3]
 H03H 9/60
·  ·  ·  ·  Electric coupling means therefor  [3]
 H03H 9/62
·  ·  comprising resonators of magnetostrictive material (H03H 9/64 takes precedence)  [3]
 H03H 9/64
·  ·  using surface acoustic waves  [3]
 H03H 9/66
·  Phase shifters  [3]
 H03H 9/68
·  ·  using surface acoustic waves  [3]
 H03H 9/70
·  Multiple-port networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common or source  [3]
 H03H 9/72
·  ·  Networks using surface acoustic waves  [3]
 H03H 9/74
·  Multiple-port networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source (networks for phase shifting H03H 9/66)  [3]
 H03H 9/76
·  ·  Networks using surface acoustic waves  [3]
P:40 H03H 11/00
Networks using active elements
 H03H 11/02
·  Multiple-port networks  [3]
 H03H 11/04
·  ·  Frequency selective two-port networks  [3]
 H03H 11/06
·  ·  ·  comprising means for compensation of loss  [3]
 H03H 11/08
·  ·  ·  using gyrators  [3]
 H03H 11/10
·  ·  ·  using negative impedance converters (H03H 11/08 takes precedence)  [3]
 H03H 11/12
·  ·  ·  using amplifiers with feedback (H03H 11/08, H03H 11/10 take precedence)  [3]
 H03H 11/14
·  ·  ·  using electro-optical devices  [3]
 H03H 11/16
·  ·  Networks for phase shifting  [3]
 H03H 11/18
·  ·  ·  Two-port phase shifters providing a predetermined phase shift, e.g. "all-pass" filters  [3]
 H03H 11/20
·  ·  ·  Two-port phase shifters providing an adjustable phase shift  [3]
 H03H 11/22
·  ·  ·  providing two or more phase shifted output signals, e.g. n-phase output  [3]
 H03H 11/24
·  ·  Frequency-independent attenuators  [3]
 H03H 11/26
·  ·  Time-delay networks (analogue shift registers G11C 27/04)  [3]
 H03H 11/28
·  ·  Impedance matching networks  [3]
 H03H 11/30
·  ·  ·  Automatic matching of source impedance to load impedance  [3]
 H03H 11/32
·  ·  Balance-unbalance networks  [3]
 H03H 11/34
·  ·  Networks for connecting several sources or loads working on different frequencies or frequency bands, to a common load or source (for use in multiplex transmission systems H04J 1/00)  [3]
 H03H 11/36
·  ·  Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source (phase shifters providing two or more output signals H03H 11/22)  [3]
 H03H 11/38
·  ·  One-way transmission networks, i.e. unilines  [3]
 H03H 11/40
·  ·  Impedance converters  [3]
 H03H 11/42
·  ·  ·  Gyrators (used in frequency selective networks H03H 11/08)  [3]
 H03H 11/44
·  ·  ·  Negative impedance converters (H03H 11/42 takes precedence; used in frequency-selective networks H03H 11/10)  [3]
 H03H 11/46
·  One-port networks  [3]
 H03H 11/48
·  ·  simulating reactances  [3]
 H03H 11/50
·  ·  ·  using gyrators  [3]
 H03H 11/52
·  ·  simulating negative resistances  [3]
 H03H 11/54
·  Modifications of networks to reduce influence of variations of temperature  [3]
P:30 H03H 15/00
Transversal filters (electromechanical filters H03H 9/46, H03H 9/70)  [3]
 H03H 15/02
·  using analogue shift registers  [3]
P:20 H03H 17/00
Networks using digital techniques  [3]
 H03H 17/02
·  Frequency-selective networks  [3]
 H03H 17/04
·  ·  Recursive filters  [3]
 H03H 17/06
·  ·  Non-recursive filters  [3]
 H03H 17/08
·  Networks for phase-shifting  [3]
P:10 H03H 19/00
Networks using time-varying elements, e.g. N-path filters  [3]
P:0 H03H 21/00
Adaptive networks  [3]