Siemens Aktiengesellschaft

Eberhard Wanka

Ulrich Kobler

Horst Tamm

Martin Aidn

Walter Golker

A magnetic field probe contains an injected coil body having a cloverleaf shape and on which two windings offset relative to one another by 90.degree. are provided. The coil body is positionally fixed in precise fashion in recesses of a bipartite housing, and are fixed therein via supporting tabs. The housing is formed of two identically fashioned half shells which are joined to one another with a friction-type lock by means of fastening elements applied in complementary fashion relative to a center plane.

Magnetic field probe with improved positioning of a winding and core

A polarized electromagnetic relay has two U-shaped angled yokes which are parallelly disposed on opposite sides of a permanent magnet. Each yoke has two free lateral legs projecting upwardly at opposite ends of the yoke respectively forming two pairs of yoke legs with the legs of the other yoke. A U-shaped pivotable armature is disposed between the pairs of yoke legs, the armature having downwardly angled legs at its opposite free ends. The two yokes in combination with the permanent magnet are embedded in a coil body. A cup-shaped base body open toward the bottom of the relay is inverted over the coil body, the base body having a bearing for the armature and a plurality of embedded contact terminal pins. In combination with a housing cap, the base body forms a contact space which is sealed from the coil winding and from the exterior atmosphere.

Polarized electromagnetic relay

An electromagnetic relay is provided in which the housing therefor is divided into two space areas, namely, one for the contacts, which is sealed off from a coil space area. The contact space is substantially sealed from the coil winding by having the carrier for the movable armature, the movable contacts and the stationary contacts on one side of a base body, and the coil on the other side. The contact area is provided by the base body and a protective cap. Stationary contact terminals are embedded in the wall of the base body. Spring biased movable contacts are mounted in the contact space. The protective cap closely adjoins the base body. The coil has a ferromagnetic core which at opposite ends of the coil have uprising flanges which form pole shoes. These flanges extend through openings in the base body in proximity to the armature. A permanent magnet means is also located in the contact space area in proximity to the pole shoes so when the coil is energized the carrier is shifted from one position to another to open and close switch contacts. The flanges are sealed to the base body and act as the supporting means for the coil.

Electromagnetic relay

An electromagnetic relay has an angled yoke affixed to a first end of a magnetizable coil core and extending parallel to said core to an end spaced radially adjacant an opposite end of the core. An armature is pivotally supported upon the free end of the yoke for movement toward and away from said opposite end of the core. The yoke is formed with a recess or slot in its free end which engages a lateral projection from a flange affixed about said opposite end of the core. The projection cooperates with the yoke recess to fix the free end of the yoke in lateral and radial position with respect to the core. The projection and recess align the yoke in position parallel to the core during assembly of the relay, assuring good magnetic contact beween the core and the yoke at the point of attachment. The recess and projection also reinforce the assembly against mechanical displacement of the yoke during service with consequent breaking or impairment of the magnetic circuit connection.

Growing community of inventors

Dachau, Germany

Eberhard Wanka