Electromagnetic relay

Claim 2

An electromagnetic relay comprising: an E-shaped stationary iron core having a middle leg, side legs, and a transverse bar connecting said legs at their respective one ends; a spool means comprising a base having recesses in opposite sides thereof, a flange, and a stem portion connecting said base and flange, said stem portion surrounding said iron core middle leg; a coil wound on said stem portion, said iron core side legs extending alongside said coil at both sides thereof; an armature disposed generally parallel with said stationary core and adapted to be attracted by said iron core upon energization of said coil; a pair of movable contact carrying members disposed so as to extend at both sides of said coil generally parallel with said iron core side legs; at least a pair of fixed contact carrying members opposed to said movable contact carrying members; plug means having portions adapted to be fitted into said recesses in said spool base so as to hold the end portions of said armature and said movable and fixed contact carrying members; means connecting said armature to said movable contact carrying members so that upon energization of said coil, said armature is attracted by said core thereby to cause the contacts on said movable contact carrying members to be moved into or out of contact with the contacts on said fixed contact carrying members.

Claim 3

The relay of claim 1, wherein said armature is U-shaped having two side legs spaced apart from each other and a transverse bar connecting the outer ends of said side legs, with a recess being formed in the one end of each of said armature side legs at the inner sides thereof, and wherein said spaced pair of movable contact carrying members have their respective free ends formed with a recess directed in the direction opposite to that of said recess formed in each said armature side leg, and wherein said connecting plate has a first pair of projections adapted to engage in said recesses in said armature side legs and a second pair of projections adapted to engage in said recesses in said movable contact carrying members.

Claim 4

The relay of claim 1, wherein said spool is provided with a stop means for restricting the distance said armature is moved away from said stationary iron core when said coil is deenergized.

Claim 5

The relay of claim 1, wherein said spool is provided with a stop means for determining the position of each said fixed contact carrying member relative to each said corresponding movable contact carrying member.

Claim 6

The relay of claim 2, wherein a gap is formed between said iron core middle leg and said connecting bar of said armature under the condition that said connecting bar is attracted by said iron core middle leg upon energization of said coil.

Claim 7

The relay of claim 1, wherein each said stationary iron core side leg has its one end supported by said base.

Claim 8

The relay of claim 1, further including a protective cover detachably mounted on said spool so as to cover the parts on said spool, with most of said transverse bar of said iron core being exposed outside said protective cover for cooling of said iron core.

Claim 9

The relay of claim 1, further including a pair of terminals secured to said spool base by means of said plug means.

Claim 10

The relay of claim 1, wherein each said plug means is provided with a projection and wherein said armature is U-shaped comprising a pair of armature side legs and a transverse bar connecting the free ends of said armature side legs, the opposite end of each of which is supported by said projection of said plug means so that said free ends of said armature side legs with said connecting bar are movable relative to said fixed iron core.

Claim 11

The relay of claim 9, wherein said projection of said plug means has an extension along each of said iron core side legs, each of said armature side leg ends being supported by said extension.

Claim 12

The relay of claim 9, wherein said spool base is further provided with slots for said transverse bar of said iron core to be engaged in, and each said side leg of said stationary iron core has a notch formed adjacent the juncture with said transverse bar, and each said plug means has a portion engaging said notch in each said recess formed in said spool base thereby securing said iron core to said spool base.

Claim 13

The relay of claim 10, wherein said spool base is further provided with slots for said transverse bar of said iron core to be engaged in, and each said side leg of said stationary iron core has a notch formed adjacent the juncture with said transverse bar, and each said plug means has a portion engaging said notch in each said recess formed in said spool base thereby securing said stationary iron core to said spool base.

Claim 14

The relay of claim 1, wherein one of said recesses in each side portion of said spool base is provided with a plurality of grooves in each of which the one end of each of said movable and fixed contact carrying members is engaged.

Claim 15

The relay of claim 1, wherein one of said recesses in each side portion of said spool base is provided with a plurality of grooves in each of which the one end of each of said movable and fixed contact carrying members is engaged, and a groove crossing said first-mentioned grooves, and said spool base is further provided with slots for said transverse bar of said iron core to be engaged in, and each said side leg of said stationary iron core has a notch formed adjacent the juncture with said transverse bar, and each said plug means has a first portion engaging with said notch in said one recess, and a second portion having along each said side leg of said stationary core an extension which supports one of said side legs of said armature.

Claim 16

An electromagnetic relay comprising: an E-shaped stationary iron core having a middle leg, both side legs and a transverse bar connecting said legs at their respective one ends; a spool comprising a base having recesses in opposite sides thereof, a flange and a stem portion connecting said base and flange, said stem portion surrounding said iron core middle leg; a coil wound on said iron core middle leg; a coil wound on said stem portion, with said iron core side legs extending alongside said coil at both sides thereof; an armature disposed generally parallel with said stationary core and adapted to be attracted by said iron core upon energization of said coil; a pair of movable contact carrying members disposed so as to extend at both sides of said coil generally parallel with said iron core side legs; at least a pair of Fixed contact carrying members opposed to said movable contact carrying members; plug means having portions adapted to be fitted into said recesses in said spool base so as to hold the end portions of said armature, movable and fixed contact carrying members; means connecting said armature to said movable contact carrying members so that upon energization of said coil, said armature is attracted by said core thereby to cause the contacts on said movable contact carry members to be moved into or out of contact with the contacts on said fixed contact carrying members, said recesses in each side portion of said spool base being provided with a plurality of grooves in each of which the one end of each of said movable and fixed contact carrying members is engaged, and a groove crossing said first-mentioned grooves, said spool base being provided with slots for said transverse bar of said iron core to be engaged in, each said iron core side leg having a notch formed adjacent the juncture with said transverse bar, each said plug means having a first portion engaging with said notch in said one recess and a second portion having along each said side leg of said stationary core an extension which supports one of said side legs of said armature.

Claim 17

An electromagnetic relay comprising: an E-shaped stationary iron core having a middle leg, both side legs and a transverse bar connecting said legs at their respective one ends; a spool comprising a base having recesses in opposite sides thereof, a flange and a stem portion connecting said base and flange, said stem portion surrounding said iron core middle leg; a coil wound on said iron core middle leg; a coil wound on said stem portion, with said iron core side legs extending alongside said coil at both sides thereof; an armature disposed generally parallel with said stationary core and adapted to be attracted by said iron core upon energization of said coil; a pair of movable contact carrying members disposed so as to extend at both sides of said coil generally parallel with said iron core side legs; at least a pair of Fixed contact carrying members opposed to said movable contact carrying members; plug means having portions adapted to be fitted into said recesses in said spool base so as to hold the end portions of said armature, movable and fixed contact carrying members; means connecting said armature to said movable contact carrying members so that upon energization of said coil, said armature is attracted by said core thereby to cause the contacts on said movable contact carry members to be moved into or out of contact with the contacts on said fixed contact carrying members, said recesses in each side portion of said spool base being provided with a plurality of grooves in each of which the one end of each of said movable and fixed contact carrying members is engaged, and a groove crossing said first-mentioned grooves, said spool base being provided with slots for said transverse bar of said iron core to be engaged in, each said iron core side leg having a notch formed adjacent the juncture with said transverse bar, each said plug means having a first portion engaging with said notch in said one recess and a second portion having along each said side leg of said stationary core an extension which supports one of said side legs of said armature.