Electromagnetic relays

Classification Context

Section:

ELECTRICITY

Class:

ELECTRIC ELEMENTS

Subclass:

ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES

Child Classifications

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• H01H 51/01 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
• H01H 51/02 Non-polarised relays
• H01H 51/22 Polarised relays
• H01H 51/27 Relays with armature having two stable magnetic states and operated by change from one state to the other
• H01H 51/28 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
• H01H 51/29 Relays having armature, contacts, and operating coil within a sealed casing
• H01H 51/3 specially adapted for actuation by AC
• H01H 51/34 Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts