IPC Subgroup
H01F 21/02 continuously variable, e.g. variometers
Introduced: September 1968
Last revised: January 2006
Full Title
Variable inductances or transformers of the signal type > continuously variable, e.g. variometers
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
Related Keywords
VARIOMETERS
4 direct subcodes
Child Classifications
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- H01F 21/04 by relative movement of turns or parts of windings
- H01F 21/06 by movement of core or part of core relative to the windings as a whole
- H01F 21/08 by varying the permeability of the core, e.g. by varying magnetic bias
- H01F 21/1 by means of a movable shield