Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – With housing or support means
Patent
1998-11-09
2000-10-10
Gellner, Michael L.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
With housing or support means
174 35R, 174 35MS, 206719, 361816, 361818, 361819, H01H 1304, H01H 902
Patent
active
061305928
ABSTRACT:
There is provided an electro-magnetic relay including (a) a coil assembly including a core, a coil wound around the core, and a magnet located at the center of the coil assembly, (b) an armature block assembly including an armature swingable relative to the core, a spring swingable together with the armature and having a contact at a distal end thereof, and an insulating block formed integral with the armature and the spring, (c) a base assembly including a fixed contact facing to the spring, a fixed contact terminal on which the fixed contact is formed, a neutral terminal to be electrically connected to the spring, a coil terminal to be electrically connected to the coil, and an insulating block formed integral with the fixed contact, the fixed contact terminal, the neutral terminal, and the coil terminal, and (d) a cover housing therein the coil assembly, the armature block assembly, and the base assembly, the cover including (d-1) an enclosure having both a bottom edge defining an open bottom, and an insulating external surface, (d-2) a plurality of projections formed on the bottom edge so that the projections can support the enclosure while the enclosure stands, and (d-3) a shield metal plate covering an inner surface of the enclosure therewith, the shield metal plate having extensions extending along and beyond the projections. The electro-magnetic relay has enhanced shielding characteristic, and as a result, can quickly respond to high frequency input signals.
REFERENCES:
patent: 5008487 (1991-04-01), Shimmyo
patent: 5566055 (1996-10-01), Salvi, Jr.
Barrera Raymond
Gellner Michael L.
NEC Corporation
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