DE1283388B - Thermowell changeover contact relay - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

HOIh

German KL: 21g-4/01

Number: 1283 388

File number: P 12 83 388.4-33 (A 44191)

Filing date: October 2, 1963

Opening day: November 21, 1968

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The invention relates to a protective tube changeover relay with a permanent magnet, the two the three contacts of the changeover contact group normally hold in mutual contact.

In known relays of this type, an armature contact and are from one end face of the protective tube a closing contact and an isolating contact are introduced from the other end of the protective tube. A contact part that can be pivoted about a central pivot point is articulated to the armature contact, in the rest position by means of a permanent magnet on the back of the isolating contact with the isolating contact is held in engagement. When the relay winding is excited, a magnetic field is built up, under its effect, the pivotable contact part against the force of the permanent magnet from Isolating contact is released and brought to rest on the closing contact.

The invention has for its object to provide a protective tube changeover contact relay that with less actuation energy than the described known relay and in which the Switching times are reduced.

This object is achieved according to the invention on the basis of a relay of the type mentioned at the beginning solved that the isolating contact and the armature contact from the same end and the closing contact from from the opposite end into the protective tube, the armature contact at its inner end has a resiliently attached, stepped portion made of magnetic material and the isolating contact at its inner end carries a permanent magnet, which normally carries the stepped section attracts and thus holds the armature contact and the isolating contact in engagement, whereby by exciting the winding one in series via the make contact and the parallel arrangement of armature contact and isolating contact with permanent magnet reaching magnetic flux is generated in such a way that the stepped portion of the armature contact is repelled by the isolating contact and brought to bear on the closing contact.

Instead of counteracting the changeover as with the known relays, the permanent magnet provides support the transition from one switch position to the other, although it occurs when the winding is not energized keeps armature contact and isolating contact in mutual engagement in a known manner. The relay can as a result, can be switched quickly and safely with relatively low energy. It draws are characterized by high sensitivity without having to set critical contact distances. The remote section is preferably in the protective tube changeover contact relay

Applicant:

Automatic Electric Laboratories Inc.,
Northlake, JIl. (V. St. A.)

Representative:

Dipl.-Ing. Helmuth Görtz, patent attorney,

6000 Frankfurt

Named as inventor:

Robert J. Gomperts, Antwerp;

Leo M. Sprengers, Lier (Belgium)

Claimed priority:

V. St. v. America 9 October 1962 (229 351)

substantially S-shaped and aligned so that its one leg along one with the longitudinal axis of the armature contact coinciding axis and its other leg along one to the

The longitudinal axis of the armature contact runs parallel to the axis. It is also advantageously connected to the isolating contact via a leaf spring, so that practically no contact bounce occurs.
In a further embodiment of the invention, the closing contact can be provided with a shoulder which is perpendicular to its longitudinal axis and whose end extends as far as an imaginary extension of the free end of the stepped section. This approach contributes to the fact that the magnetic flux formed when the winding is excited moves the remote section away from the permanent magnet and towards the make contact. Several changeover contact groups, each with a permanent magnet and a separate section, can be accommodated parallel to one another within a common protective tube.

The invention is explained in more detail below on the basis of exemplary embodiments. It shows

IA is a plan view of a protective tube changeover contact relay according to the invention in the non-excited state, with individual parts being omitted,

Fig. IB the relay according to Fig. 1A in the energized state,
F i g. 2 shows a modified form of the in FIGS. 1A and IB shown relays and

F i g. 3 a relay with several changeover contact groups according to FIGS. 1A and 1B.

809 638/1518

Claims (5)

3 4 The relay according to FIGS. 1A and 1B has a karft F is therefore proportional to Φ _ρ ² . If an external magnetic field H _E protective tube 10 made of glass or plastic, a winding 17 sitting on the protective tube in the same direction as the magnetic axis and three contacts of the permanent magnet is now applied by elongating the winding 17, preferably filled with protective gas, a second magnetic field is applied 11, 12 and 13. The contacts can have rectangular, 5 flux Φ _Ε , which look superimposed on the first and have a square or circular cross-section through the section 15 and the closing contact 11 in and are preferably rigid. In the illustrated the direction "c be" flows. If the flow is in the gap embodiment, the winding 17 is immediately "be" equal to Φ _Ε , so the entire is wound on the down the protective tube; instead, 15 force exerted can be cut proportionally Φ _Ρ ² - Φ _Ε ~. they also on one of the protective tube surrounding io. The resulting flow through section 15 is to be wound on bobbins. The isolating contact 12 Φ _Ρ —Φ _Ε , created by the difference between and the armature contact 13 extend from one end to the field of the permanent magnet and the outer and the closing contact 11 from the other end into the magnetic field H _E. Protection tube. The outer ends of the contacts As soon as Φ _Ε becomes larger than Φ _ρ , the reverses to the serve as contact connections. 15 Section 15 acting tensile force and moves the The isolating contact 12 carries a permanent magnet 14 on its inner section from the permanent magnet 14 to the closing con end, which, for example, clocks 11. If the flux Φ _Ε becomes greater, it is designed in the shape of a nega rod and becomes stronger along the longitudinal force. The portion 15 moves fast axis of the contact 12 runs. With his free ler. The resultant force is also proportional to the end of the permanent magnet extends approximately up to 20 Φρ ² -Φ _£ ² so that the permanent magnetic force of the tensile force center of the longitudinal dimension of the protective tube. When Φ _Ε counteracts. Finally, the embodiment shown in section assumes the permanent magnet so 15 the position shown in FIG. 1B. If, however, the polarity is such that the north pole is at its free end and the external field H _{E is} so strong that the section 15 of the south pole at which the isolating contact 12 is saturated by pulling magnetism, the end that is always reversed acts. A spring 16 is connected to the inner end of the armature magnetic field of the movement of the section 15 in the slide contact 13, which no longer opposes a stepped section 15 made of magnetic work on the closing contact 11 but repels the section because it is now in the fabric wears. The spring 16 is preferably a thin, same direction as the permanent magnet magnetizes round or flat, resilient metal piece, which is and the leg 15 b has also become a pivoting movement of the section 15 with reference 30 to a north pole. If this occurs, the switchover to the make contact 11 is permitted. Instead, the spring and the armature contact can also come from an air gap "&-e", relatively independent of the size of the spring. Piece of resilient metal. The section When dropping the relay, the effect is different. 15 is designed essentially S-shaped, namely, if the external magnetic field is reduced, it increases in such a way that its legs 15 a, 15 & practically parallel 35 magnetization of the section 15 to the linear one to another. The leg 15 a extends into the area. Φ _Ρ is greater than Φ _Ε , and the one moving in the direction of the longitudinal axes of the spring 16 and section 15 moves to the permanent magnet 14 of the armature contact 13. The end face of the opposite is back. offset leg 15b is approximately aligned with the The training according to Fig. 2 enables the saturation free end of the permanent magnet 14. The ends of both the movement of the section 15 through an external field, parts 14, 15 extend above the plane of the inner before the tensile force between the section 15 and the end of the closing contact 11 also. As a result, the closing contact 11 is greater than the tension exerted by the permanent magnet 14 on the section 35 between the permanent magnet 14 and the closing force - 45 force on the section 15 as soon as this is saturated by the excitation of the winding 17 from the closing contact 11 the external magnetic field Φ _Ε The movement is attracted. movement of section 15 is due to the tensile force Fig. 2 shows a modified form of the supported in the flow Φ _Ε , the relay shown in the gap "£ - <?" Fig. 1, in which the closing acts. The force effecting the switching is then contact 11 'with a projection 18 which is proportionally perpendicular to the main axis of the contact 50 right from the start of the movement. The an Φ ^ + Φρ ² . As a result, the relay is very sensitive set 18 is preferably so far that it (the saturation is reached quickly), -and his we-legs 15 b of the section 15 is opposite, kung is not critical in terms of the size of the when this is on the permanent magnet 14 is present. Like Spalts »έ-e«. is explained in more detail below, makes 55 Fig. 3 shows an arrangement in which several address this modification primarily in the magnetic field in connection with FIGS. 1A and 1B and the sensitivity of the relay described changeover contact groups 20 in the same noticeable. Protective tube 10 'are housed and the particular If no external field is applied, and if the winding 17 is not energized in the case of relatively extensive switching, the deposition is located, e.g. B. in a switchboard, is appropriate. Section 15 in the position shown in Fig. 1A instead of the illustrated three changeover contacts. In this case, the permanent magnet 14 induces groups in which more groups can also be used. Section 15 a magnetic field Φ _ρ in such a way that _ ... the lines of force move in the direction »abed« hlk Sch! ießen die using the formula F = ^ (where ^6s . ^L protective tube changeover contact retois with μ ^K a permanent magnet, the two of the three contacts A is the area and μ is the permeability of the air) of the switching contact group normally in calculated tensile force acting on section 15 - mutual contact stops, thereby identifying records that the separating contact (12) and the Armature contact (13) from the same end and the make contact (11) from the opposite end from reaching into the protective tube, the armature contact is flexible at its inner end has attached, stepped section (15) made of magnetic material and the isolating contact at its inner end a permanent magnet (14) which normally carries the remote Section (15) attracts and thus holds the armature contact and the isolating contact in engagement, whereby by energizing the winding (17) in series via the normally open contact and the parallel arrangement generated from armature contact and separating contact with permanent magnet reaching magnetic flux is that the detached section of the armature contact is repelled from the isolating contact and is brought to the system at the closing contact. 2. Protection tube changeover relay according to claim 1, characterized in that the ab- so set section (15) is substantially S-shaped and oriented so that its one leg (15 a) along a with the longitudinal axis of the armature contact (13) coinciding axis and its other leg (15 b) runs along an axis parallel to the longitudinal axis of the armature contact. 3. protective tube changeover relay according to claim 1 or 2, characterized in that the offset section (15) is connected to the isolating contact (12) via a leaf spring (16) is. 4. protective tube changeover contact relay according to one of the preceding claims, characterized characterized in that the normally open contact (U ') has one which is perpendicular to its longitudinal axis Approach (18) is provided, the end of which up to an imaginary extension of the free end of the remote section (15) is enough. 5. protective tube changeover contact relay according to one of the preceding claims, characterized characterized in that several changeover contact groups (20) each with a permanent magnet (14) and a stepped section (15) parallel to one another within a common protective tube (10 ') are housed. Considered publications:
German Auslegeschrift No. 1089 069;
U.S. Patent Nos. 2,957,961, 2535400. 1 sheet of drawings 809 633/1518 11.68 © Bundesdruckerei Berlin