Electromagnet assembly for relays

Claim 2

In an electromagnet assembly for relays, including an Eshaped yoke with a center pole piece arm carrying an exciting coil and having a pole shoe extension operatively related to a bar armature extending thereacross and provided with a pair of spaced arms held in normally spaced relation to side arms of the yoke by respective biasing leaf springs, the improvement comprising: integral flange means on the springs gripping the armature legs in a substantially stress-free relation; and means effecting interlock of the flange means with the armature legs to prevent displacement of the armature legs.

Claim 3

An assembly according to claim 1, said interlock means comprising recesses in the armature legs and portions of said flanges turned into said recesses.

Claim 4

An assembly according to claim 1, said flange means comprising claw-like cooperating pairs of flanges on the respective springs.

Claim 5

An assembly according to claim 3, each of the flanges of each of the pairs of flanges having turned end portions engaged in recesses in the armature arms.

Claim 6

An assembly according to claim 1, said flange means and anchoring means permitting slight play in the connection between the armature legs and the springs so that even though the springs and armature legs are thus thoroughly locked together undesirable stresses in springs are avoided.

Claim 7

An assembly accordinG to claim 1, said springs each having a body portion and an obtusely angular armature-supporting leg provided with said armature leg engaging flanges, said body portion and said spring leg being connected by a fulcrum bend, and means fixedly connecting the body portion adjacent to its end remote from said bend to the associated yoke arm, whereby the spring legs hold the armature normally biased away from the pole shoe extension and upon energizing the exciting coil to effect drawing of the armature toward the pole shoe extension fulcruming occurs at the fulcrum bend accompanied by upward resilient flexing bending of said body portion.

Claim 8

An assembly according to claim 6, including flexure controlling cut-outs in said body portion.

Claim 9

In an electromagnet assembly for relays, including an E-shaped yoke with a center pole piece arm carrying an exciting coil and having a pole shoe extension operatively related to a bar armature extending thereacross and provided with a pair of spaced legs held in normally spaced relation to side arms of the yoke by respective biasing leaf springs, the improvement comprising: said leaf springs including body portions and armature-supporting legs connected together at obtuse angle bends such that with the body portions lying generally parallel with the yoke arms the spring legs extend angularly away from the yoke arms; means fixedly attaching the body portions adjacent to their free ends to the yoke arms; and means connecting the spring legs in biasing relation to the faces of the armature legs which face toward the yoke arms; whereby the angle bend connections between the body portions and spring legs of the respective springs serve as fulcrum bearings in operating movements of the armature.

Claim 10

In an electromagnet assembly for relays, including an E-shaped yoke with a center pole piece arm carrying an exciting coil and having a pole shoe extension operatively related to a bar armature extending thereacross and provided with a pair of spaced legs held in normally spaced relation to side arms of the yoke by respective biasing leaf springs, the improvement comprising: said leaf springs including body portions and armature-supporting legs connected together at obtuse angle bends such that with the body portions lying generally parallel with the yoke arms the spring legs extend angularly away from the yoke arms; means fixedly attaching the body portions adjacent to their free ends to the yoke arms; and means connecting the spring legs in biasing relation to the faces of the armature legs which face toward the yoke arms; whereby the angle bend connections between the body portions and spring legs of the respective springs serve as fulcrum bearings in operating movements of the armature.

Claim 11

An assembly according to claim 8, including claw-like flanges on said spring legs gripping said armature legs and thereby connecting the armature legs to the spring legs.

Claim 12

An assembly according to claim 8, said means securing the body portions to said yoke arms holding the body portions against turning displacement relative to the yoke arms.

Claim 13

An assembly according to claim 8, said body portions being resiliently deflectable into bowed relation between said securing means and said fulcrum bends when the armature is deflected toward said pole shoe extension.

Claim 14

An assembly according to claim 11, including generally trapezoid-shaped cut-outs in said body portions to facilitate said resilient deflection.

Claim 15

An assembly according to claim 8, said springs consisting of a material of high magnetic permeability.

Claim 16

An assembly according to claim 8, said spring legs having armature-engaging pairs of gripping flanges in claw-like relation engaging said armature legs, and said armature legs having indentations on the faces thereof which face away from said yoke legs and into which anchoring terminals of said flanges are engaged to hold the armature legs against displacement relative to the spring legs.