(0)H01H:11/15:

(0)H01H:11/15:

IPC6

SECTION H - ELECTRICITY

ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES

H01H

12/16

H01H051/00 - H01H063/00

51

/

00

Electromagnetic relays (relays using the dynamo-electric effect H 01 H 53/00)

Relays in which the armature is maintained in one position by a permanent magnet and freed by energisation of a coil producing an opposing magnetic field [3]

Non-polarised relays (H 01 H 51/01 takes precedence) [3]

with single armature; with single set of ganged armatures

Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity

Contacts alternately opened and closed by successive cycles of energisation and de-energisation of the electromagnet, e.g. by use of a ratchet

Contacts retained open or closed by a mechanical latch which is controlled by an electromagnet

Armature is movable between two limit positions of rest and is moved in both directions due to the energisation of one or the other of two electromagnets without the storage of energy to effect the return movement

without intermediate neutral position of rest

with intermediate neutral position of rest

Armature is rotatable through an unlimited number of revolutions

with two or more independent armatures

Polarised relays

without intermediate neutral position of rest

with intermediate neutral position of rest

Relays with armature having two stable magnetic states and operated by change from one state to the other

Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed (H 01 H 51/27 takes precedence)

Relays having armature, contacts, and operating coil within a sealed casing (H 01 H 51/27 takes precedence)

specially adapted for actuation by ac

Frequency relays; Mechanically-tuned relays

Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts

wherein the make-to-break ratio is varied by hand setting or current strength

Relays using the dynamo-electric effect, i.e. relays in which contacts are opened or closed due to relative movement of current-carrying conductor and magnetic field caused by force of interaction between them

Moving coils; Contact-driving arrangements associated therewith

Electrodynamic relays, i.e. relays in which the interaction is between two current-carrying conductors

Ferrodynamic relays, i.e. relays in which the magnetic field is concentrated in ferromagnetic parts

Magnetodynamic relays, i.e. relays in which the magnetic field is produced by a permanent magnet

wherein a mercury contact constitutes the current-carrying conductor

Induction relays, i.e. relays in which the interaction is between a magnetic field and current induced thereby in a conductor

Ferraris relays

Contacts actuated by an electric motor through fluid-pressure transmission, e.g. using a motor-driven pump

Magnetostrictive relays

Electrostrictive relays; Piezo-electric relays

Electrostatic relays; Electro-adhesion relays (clutches in general using the Johnson-Rahbek effect H 02 N 13/00)

Electrothermal relays (thermal switches not operated by electrical input, thermal switches with anticipating electrical input H 01 H 37/00; thermally-sensitive members H 01 H 37/32)

Heating arrangements for operating relays

Heating by glow discharge or arc in confined space

wherein the thermally-sensitive member is heated indirectly, e.g. resistively, inductively

wherein the thermally-sensitive member is only heated directly

Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts

wherein the make-to-break ratio is varied by hand setting or current strength

Selectors [3]

12