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Title H02K

Dynamo-Electric Machines.

Definition statement

This subclass covers:

Electric generators or motors, i.e. ac or dc continuously
rotating, oscillating or linear machines.
Stepping motors, i.e. with rotor rotating step by
step.
Torque motors, i.e. machines adapted to exert a torque
when stalled.
Machines for transmitting angular displacements,
e.g. Synchro, Selsyn.
Machines involving dynamo-electric interaction with
a plasma or a flow of conductive liquid or of fluid-borne conductive
or magnetic particles, e.g. Magnetohydrodynamic (MHD) pumps or generators.
Dynamo-electric converters, e.g. ac/dc converters
and vice versa, ac/ac converters, dc/dc converters.                                       
Dynamo-Electric clutches or brakes.
Dynamo-electric gears, i.e. dynamo-electric means
for transmitting mechanical power from a driving shaft to a driven shaft
and comprising structurally interrelated motor and generator parts.
Alleged perpetua mobilia obtained by dynamo-electric
means.
Machines not otherwise provided for and based on
dynamo-electric interaction.
Structural adaptation of the above mentioned machines
for the purposes of their control.

Relationship between large subject matter
areas

Starting, regulating,
electronically commutating, braking, or otherwise controlling motors,
generators or dynamo-electric converters

H02P

Measuring electric or magnetic
variables

G01R

Loudspeakers, microphones
, gramophone pick-ups or like acoustic electromechanical transducers

H04R

References relevant to classification in this
subclass

This subclass does not cover:

Dynamo-electric
relays

H01H53/00

Conversion of dc or ac input
power into surge output power

H02M9/00

Informative references

Attention is drawn to the following
places, which may be of interest for search:

Micro-structural
devices or systems

B81B

Magnetic circuits or magnets
in general

H01F

Special rules of classification

In this subclass, details are classified as follows: 

details only described with reference to, or clearly
only applicable to, dynamo-electric machines of a single basic type,
are classified in the group appropriate to the dynamo-electric machines
of that basic type, e.g. 33/16, 41/03
details of an unspecified type of dynamo-electric
machine, or disclosed as applicable to two or more kinds of dynamo-electric
machines, are classified in groups 1/00 to 13/00

Glossary of terms

In this subclass, the following
terms or expressions are used with the meaning indicated:

dynamoelectric refers
to the conversion of mechanical energy to electrical energy or vice
versa by electromagnetic means.

Title H02K1/00
Details of the magnetic circuit
References relevant to classification in this
subclass

This group does not cover:

Magnetic circuits for transformers for power supply

H01F

Magnetic circuits
for relays

H01H50/16

Title H02K3/00
Details of windings
Informative references

Attention is drawn to the following
places, which may be of interest for search:

Coils in general

H01F5/00

Title H02K5/00
Casings; Enclosures; Supports
Informative references

Attention is drawn to the following
places, which may be of interest for search:

Casings for electric apparatus in general

H05K5/00

Title H02K13/00

Structural associations of current collectors with
motors or generators, e.g. brush mounting plates, connections to windings;
Disposition of current collectors in motors or generators; Arrangements
for improving commutation

References relevant to classification in this
subclass

This group does not cover:

Supporting
or protecting brushes or brush holders in motor casings or enclosures

H02K5/14

Informative references

Attention is drawn to the following
places, which may be of interest for search:

Current
collectors in general

H01R39/00

Title H02K15/00

Methods or apparatus specially adapted for manufacturing,
assembling, maintaining or repairing dynamo-electric machines

Informative references

Attention is drawn to the following
places, which may be of interest for search:

manufacture
of current collectors in general

H01R43/00

Title H02K41/00

Propulsion systems in which a rigid body is moved
along a path due to dynamo-electric interaction between the body and
a magnetic field traveling along the path

References relevant to classification in this
subclass

This group does not cover:

electromagnetic
launchers

F41B6/00

Title H02K49/00

Dynamo-electric clutches; Dynamo-electric brakes

Informative references

Attention is drawn to the following
places, which may be of interest for search:

Electrically
or magnetically actuated clutches or brakes