DE1054578B - Toggle relay - Google Patents

Description

The invention relates to a toggle relay with a toggle lever that influences contact organs and after its actuation is held in the position reached, even if the actuation current is interrupted will.

There are toggle relays of this type with a three-legged magnetic core known, the middle Leg consists of a permanent magnet and its outer leg coils for exciting a Carry magnetic flux, which counteracts the permanent magnetic flux in one of the two tendons and reinforced it in the other leg, and in which a rocker arm is mounted on the middle leg, its halves alternate the distances between the middle leg and the two outer legs bridge. The toggle arm of the relay is activated by a current surge through the winding or the windings on the side legs operated, which has such a direction that the magnetic flux the winding or windings in the magnetic circuit closed by one of the two armatures counteracts magnetic flux of the permanent magnet. On the other hand, they act in the open magnetic circuit the magnetic flux of the actuation winding and the magnetic flux of the permanent magnet together. The attractive force acting on the armature in the closed magnetic circuit then ceases, and at the same time the force of attraction on the armature above the air gap of the open magnetic becomes greater Circle works. The rocker arm that carries the two anchors rotates around its shaft, the The air gap that was previously open is now bridged and the previously open magnetic circuit of the three-legged body closed.

In the known relays, the rocker arm is designed so that the magnetic flux can flow across the air gap must, which must always be present between the center leg and the rocker arm in order to allow easy mobility of the rocker arm. This air gap causes in the closed magnetic circuit a very large resistance, so that the magnetic properties of the three-legged magnetic circuit badly exploited.

The relay according to the invention also uses a three-legged magnetic core, the middle of which Leg consists of a permanent magnet and its outer leg coils for exciting a magnetic flux wear, which counteracts the permanent magnetic flux in one of the two legs and turns it into the other leg reinforced. The relay is designed according to the invention so that the middle Legs of the magnetic core carries pole pieces that form air gaps with the outer legs, and to the Ends of the rocker arm armature made of soft iron attached toggle relay

Applicant:

Allman
Svenska Elektriska Aktiebolaget,
Västeräs (Sweden)

Representative: Dipl.-Ing. H. Missling ₁ patent attorney,
Giessen, Bismarckstrasse. 43

Claimed priority:
Sweden 13 April 1955

Folke von Knorring, Västeräs (Sweden),
has been named as the inventor

are brought, which alternately bridge one of the air gaps. In the relay according to the invention consequently, if there is no air gap at all in the closed magnetic circuit, the resistance of the closed magnetic circuit is very small and the locking force is very large.

The relay is particularly suitable for devices whose power source has a limited capacity, z. B. Dry batteries. It is also useful in machines where it is exposed to great acceleration forces or vibrations. Because the Actuating force and the locking force are very large, there is little risk that the actuating movement does not come about or that external forces can cause an actuation movement.

The invention is explained below with reference to the drawing. In this shows

Fig. 1 is a section through a plane of symmetry of the relay and

FIG. 2 shows a section which is designated by AA in FIG. 1.

In the drawing, 1 is a rocker arm which is rotatably mounted in the carriers 2. The rocker arm carries two armatures 3 and 4 made of magnetically soft material, which alternately bridge the air gaps 5 and 6 between the magnetic poles, one of the two magnetic circuits of a three-legged body being closed in each case. The middle limb of this body contains a permanent magnet 7, the poles NN and SS of which have a pole piece 8 and a U- iron 9, respectively

809 789/385

Claims (1)

are united from magnetically soft material. The two legs 10 and 11 of the U iron 9 carry actuating windings 12 and 13. The magnetic flux of the permanent magnet 7 is divided into two branches which go through the legs 10 and 11 . The river is symbolically represented by the lines 14. The relay works as follows: If, starting from the position of the rocker arm in Fig. 1, in which the armature 3 bridges the air gap 5 , the winding 12 is excited so that the magnetic flux of the permanent magnet in the leg 10 is canceled, the magnetic flux in the leg 11 and in the gap 6 increased. The force of attraction acting on the armature 3 disappears, at the same time the force of attraction acting on the armature 4 increases, so that the lever tilts about its shaft. The armature 4 then bridges the gap 6. The actuating current to the winding is then interrupted. The force of attraction acting on the armature 4 , which is caused by the flux of the permanent magnet, locks the rocker arm in its new position. But if the Wick- ment 13 energized, the lever 1 tilts and takes the previous position. Claim. Toggle relay for permanent magnetic locking of the rocker arm with a three-legged magnetic core, the middle leg of which consists of a permanent magnet and the outer legs of which carry coils for exciting a magnetic flux, which counteracts the permanent magnetic flux in one of the two legs and amplifies it in the other leg, characterized in that, that the middle leg (7) of the magnetic core carries pole shoes (8) which form air gaps (5, 6) with the outer legs (10, 11) , and at the ends of the rocker arm (1) armature (3, 4) made of soft iron are attached that alternately bridge one of the air gaps (5, 6). Considered publications:
German patent specification No. 901 317. 1 sheet of drawings © 809 7SW385 3.59