|  | H |
SECTION H — ELECTRICITY

|  | H01 |
BASIC ELECTRIC ELEMENTS

|  | H01 |
Note(s) Processes involving only a single technical art, e.g. drying, coating, for which provision exists elsewhere are classified in the relevant class for that art.

|  | H01T |
SPARK GAPS; OTHER NON-ENCLOSED DISCHARGE APPARATUS (working metal by arc discharge Fulltext... Hierarchy... Expanded...B23, particularly Fulltext... Hierarchy... Expanded...B23P 1/00; arc lamps Fulltext... Hierarchy... Expanded...H05B 31/00)

|  | H01T 1/00 |
Details of spark gaps

|  | H01T 1/02 |
· | Means for extinguishing arc

|  | H01T 1/04 |
· · | using magnetic blow-out

|  | H01T 1/06 |
· · · | with permanent magnet

|  | H01T 1/08 |
· · | using flow of arc-extinguishing fluid

|  | H01T 1/10 |
· · · | with extinguishing fluid evolved from solid material by heat of arc

|  | H01T 1/12 |
· | Means structurally associated with spark gap for recording operation thereof

|  | H01T 1/14 |
· | Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure (Fulltext... Hierarchy... Expanded...H01T 1/16, Fulltext... Hierarchy... Expanded...H01T 1/18 take precedence)

|  | H01T 1/16 |
· | Series resistor structurally associated with spark gap

|  | H01T 1/18 |
· | Electrolytic device structurally associated with spark gap

|  | H01T 3/00 |
Spark gaps having a single gap or having a plurality of gaps in parallel, e.g. spark gap arrester (sparking plugs Fulltext... Hierarchy... Expanded...H01T 13/00)

|  | H01T 5/00 |
Spark gaps having a plurality of gaps arranged in series, e.g. spark gap arrester

|  | H01T 5/02 |
· | Arrangements for reducing height of stacked spark gaps

|  | H01T 5/04 |
· | Arrangements for improving potential distribution

|  | H01T 7/00 |
Rotary spark gaps, i.e. devices having one or more rotating electrodes

|  | H01T 9/00 |
Spark gaps specially adapted for generating oscillations

|  | H01T 11/00 |
Spark gaps specially adapted as rectifiers

|  | H01T 13/00 |
Sparking plugs

|  | H01T 13/02 |
· | Details

|  | H01T 13/04 |
· · | Means providing electrical connection to sparking plug (electric connections in general Fulltext... Hierarchy... Expanded...H01R)

|  | H01T 13/06 |
· · | Covers forming a part of the plug and protecting it against adverse environment

|  | H01T 13/08 |
· · | Mounting, fixing, or sealing of sparking plugs, e.g. in combustion chamber

|  | H01T 13/10 |
· · · | by bayonet-type connection

|  | H01T 13/12 |
· · | Means on sparking plugs for facilitating engagement by tool or by hand

|  | H01T 13/14 |
· · | Means for self-cleaning

|  | H01T 13/16 |
· · | Means for dissipating heat

|  | H01T 13/18 |
· · | Means for heating, e.g. for drying

|  | H01T 13/20 |
· | characterised by features of the electrodes or insulation

|  | H01T 13/22 |
· · | having two or more electrodes embedded in insulation (for two or more sparks Fulltext... Hierarchy... Expanded...H01T 13/46)

|  | H01T 13/24 |
· · | having movable electrodes (Fulltext... Hierarchy... Expanded...H01T 13/28 takes precedence)

|  | H01T 13/26 |
· · · | for adjusting spark gap otherwise than by bending of electrode

|  | H01T 13/28 |
· · | having spherically shaped electrodes, e.g. ball-shaped

|  | H01T 13/30 |
· · · | mounted so as to permit free movement

|  | H01T 13/32 |
· · | characterised by features of the earthed electrode

|  | H01T 13/34 |
· · | characterised by the mounting of electrodes in insulation, e.g. by embedding

|  | H01T 13/36 |
· · | characterised by the joint between insulation and body, e.g. using cement

|  | H01T 13/38 |
· · | Selection of materials for insulation (in general Fulltext... Hierarchy... Expanded...H01B 3/00)

|  | H01T 13/40 |
· | structurally combined with other devices, e.g. for preventing unauthorised use

|  | H01T 13/42 |
· · | with magnetic spark generators

|  | H01T 13/44 |
· · | with transformers, e.g. for high-frequency ignition

|  | H01T 13/46 |
· | having two or more spark gaps

|  | H01T 13/48 |
· | having means for rendering sparks visible

|  | H01T 13/50 |
· | having means for ionisation of gap

|  | H01T 13/52 |
· | characterised by a discharge along a surface

|  | H01T 13/54 |
· | having electrodes arranged in a partly-enclosed ignition chamber

|  | H01T 13/56 |
· | characterised by having component parts which are easily assembled or disassembled

|  | H01T 15/00 |
Circuits specially adapted for spark gaps or other non-enclosed-discharge apparatus

|  | H01T 15/02 |
· | for sparking plugs

|  | H01T 17/00 |
Arcing horns

|  | H01T 19/00 |
Devices providing for corona discharge

|  | H01T 19/02 |
· | Corona rings

|  | H01T 19/04 |
· | having pointed electrodes, e.g. for treating plastics

|  | H01T 20/00 |
Non-enclosed-discharge apparatus not otherwise provided for [2]

|  | H01T 20/02 |
· | Apparatus for generating ions to be introduced into non-enclosed gases, e.g. the atmosphere (ion guns Fulltext... Hierarchy... Expanded...H01J 3/04; generating plasma Fulltext... Hierarchy... Expanded...H05H) [2]

|  | H01T 21/00 |
Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs

|  | H01T 21/02 |
· | of sparking plugs

|  | H01T 21/04 |
· · | Cleaning of sparking plugs