DE1219122B - Electromagnetic relay with freely movable ball contacts - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. σ .:

HOIh

German class: 21g -4/01

Number: 1219122

File number: J 22690 VIII c / 21 g

Filing date: November 20, 1962

Opening day: June 16, 1966

The invention relates to an electromagnetic relay, in which the contact is made by at least a ball moving in a magnetic field takes place.

Electromagnetic relays are known, with one freely supported in the working air gap of the relay Armature, preferably spherical shape, which is under the influence of at least one permanent magnet stands. The iron circle of this relay is built up with two straight bars, preferably made of a round profile, which are arranged one behind the other and with their ends facing the working air gap limit. As flat components, the permanent magnet or magnets are preferably rectangular in cross section formed and arranged in a plane running parallel to the plane in which the rods lie. This known arrangement of protective tube contact relays with ball armatures is very expensive and difficult to manufacture in terms of manufacture.

Furthermore, a polarized ball armature relay is known in which three at an angle of 120 ° arranged contact-making parts adapted to the outer shape of the ball, d. H. with grooves are provided. Apart from the fact that a groove is difficult to produce, the The disadvantage that a relatively large amount of energy is expended to make contact between two contact elements must be to the ball anchor from its natural rest position in the recess over the Edge of the same to transport.

In another known electromagnetic relay are as a movable armature within a Protective tube provided a variety of balls that. when the electromagnetic is excited System together in the direction of the flow and thus an electrical connection between the two contact elements. This version has the disadvantage that by the large number of balls used as anchors the contact resistance - which is as small as should be possible - will be very large.

The invention has the task of eliminating the disadvantages of the known embodiments of relays with ball armatures to avoid. According to the invention this is achieved in that

a) the contact pins in the preferably spherical housing at the contact point have a round cross-section and face each other exactly,

b) the ends of the contact pins in the form of a truncated cone for proper contact making and separation or are rounded and

Electromagnetic relay with
freely movable ball contacts

Applicant:

International Standard Electric Corporation,

New York, N.Y. (V. St. A.)

Representative:

Dipl.-Ing. H. Ciaessen, patent attorney,

Stuttgart 1, Rotebühlstr. 70

Named as inventor:
Heinrich Stoeri,
Oberrieden, Zurich (Switzerland)

Claimed priority:

Switzerland of November 23, 1961 (1367)

c) the contact pins and the ball or balls, on their surface with a non-magnetic Metal layer are coated.

According to an embodiment according to the invention, the contact pins are opposite to each other at an inclination of 45 ° the vertical axis of the relay inserted into the housing of the contact system.

According to a further embodiment according to the invention, the contact space is in the housing of the contact structure filled with an inert gas. By the electromagnetic relay according to the invention various advantages achieved. So it shows z. B. a great responsiveness, and you achieves a high level of contact reliability through the double contact. Since inside the protective tube at the Contact making no spring is used, the contact arrangement is very bounce-free.

Furthermore, an increased service life is achieved because of the constantly changing contact points extremely low contact wear occurs on ball anchors and contact elements. Due to the spherical shape of the housing, the balls are independent in the rest position (electromagnetic system not energized) from the position of the protective housing from the contact gap in the middle of the housing always the same distance. When disconnecting the contact (switching off the electromagnetic system) fall the balls due to the frustoconical or rounded design of the con

609 579/287

Claims (1)

3 4 clock pins off easily. The dropping will still give the relay a great response sensitivity, supports that both the balls and the con - it is achieved a high level of contact reliability, there tact pins with a non-magnetic metal layer due to the multiple contact of the contact transition are coated. In addition, this metal layer leads to resistance being reduced. Since within the protective to a low contact resistance. 5 tube when making contact, no spring is The invention is applied with the help of a drawing, the contact arrangement is very bounce-free, wrote. In the drawing shows. . An increased service life is achieved because a F i g. 1 is a section through a relay after the low contact wear that results from it Invention, in an enlarged view, arises that the contact points on Ku- F i g. 2 shows a section through a further Ausfüh- io gel 8 and contact tip 6 because of the enlarged example of a relay according to the invention, constantly changing in only surface, somewhat enlarged view, FIG. 2 shows a further exemplary embodiment according to 3 shows a section from a further case of the invention, in which the contact tips and game of a relay according to the invention, cut a vessel containing balls on each end of two and shown enlarged and 15 U-shaped, with the open legs on top of each other. Fi g. 4 the view of a relay according to the invention of the core parts 5 'and 5 "is attached dung, in which the connection lugs of the contact other legs of the U-shaped core parts 5 'and 5 " unit are angled. are electrically isolated from each other in an exciter The relay of the F i g. 1 has a coil 1, the coil 1, which is placed on a coil carrier 2. is wound on the coil carrier 2, which leaves a relatively large interior space in the relay 20 The other parts of their training and functional structure. These correspond to those with the same references Interior contains a tight housing 4, which is shown in the characters in FIG. 1. Also shown in the embodiment Example is spherical. It game according to FIG. 2, the housing 4 is removed from the magnet however, any other flux permeated through the housing table when the coil is energized. room 3 have an appropriate shape. The housing 4 25 To the contact position in the vertical as well as the horizontal can made of glass or some other suitable size exist. To get diametrically opposed to each other nicely, the 'contact tips can be found below are in the housing 4 two made of magnetic material at an angle of 45 ° are inserted into the vessel, material existing contact pins 5 introduced, which as in F i g. 1 is shown. have their outer ends terminal lugs. The 30 in F i g. 3 shows a housing 4 in the form of a tube located in the housing 4 contact tips 6 of the con, in which the end plug 10 of a clock pin 5 run out in the shape of a truncated cone and form shoulder 9, which has the contact balls 8 in the magnetic field two opposing poles. energized state of the relay separates from the contact pin. Between them is the contact space 7. The tasks of the other numbered components. This contact space 7 is the same in the energized state of the 35 as for FIG. 1 described.
Relay through the balls 8 made of magnetic material F i g. 4 shows a relay in an approximated natural bypassing the connection between the two sizes. To create a magne pen that is as closed as possible (shown in dashed lines). To get the relay table circle, the contact pins made of magnetisierkann with the coil horizontally or with the coil ble material, are held or fastened lying vertically, without showing 40, and by their shape they form the balls in the unexcited state of the coil ■ the external yoke on one side of an electrical connection between said coil 1. Establish contact point 5. The contact tips 6 of the relay according to the invention can with regard to contact pins S and the balls 8 have a noble Hch of its construction and its exterior of the protective metal coating on the sticking of the balls 45 vessel are given different shapes. It is at the contact point, if the coil is also possible, prevents the relay from building up by choosing is excited. the remanence of the material of the core or of the If the interior of the housing when energized to make the contact pin 5 so that the ball or Coil is flowed through by a magnetic field, balls that z. B. in the rest position of the relay the Verbinso the balls move in the direction of the 5 ° connection between the contact tips greatest field strength and provide an electrical connection to a connected current flow within the relay bond between the two contact pins 5. coil are repelled and open the connection. The contact pressure between the balls and the Contact pins depends on the field strength. Since patent claims: no spring forces act on the contacts, takes place 55 the closing of the same without any disadvantageous notice- 1. Electromagnetic relay, its contact-making bruise. When the measuring system disappears in a housing made of a non-conductive matrix field due to de-excitation of the coil 1 roll the rial is arranged such that between contact balls 8 due to their gravity from space 7 create a little air from magnetizable material the contact tips in the illustrated or 60 gap is present, through at least one a corresponding rest position. As a result, spherical anchors open under the influence of the masie overpin the electrical connection between the contact magnetomotive force of an excitation coil S. is bridged, characterized The housing 4 can prevent any that Oxidation with a protective gas, e.g. B. nitrogen, ge 65 a) the contact pins in the preferably ball-filled be. shaped housing on the con- Due to the embodiment according to the invention, the clocking point has a round cross section various advantages are achieved. So z. B. have and face each other exactly, b) the ends of the contact pins in the form of a truncated cone for proper contact making and separation or are rounded and c) the contact pins and the ball or balls, on their surface with a non-magnetic Metal layer are coated. 2. Electromagnetic relay according to claim 1, characterized in that the contact pins at an inclination of 45 ° with respect to the vertical axis of the relay into the housing of the contact system are felt. 3. Electromagnetic relay according to claim 1 and 2, characterized in that the Contact space in the housing of the contact structure is filled with an inert gas. Considered publications:
U.S. Patent Nos. 2015 156, 2732458. 1 sheet of drawings 609 579/287 6.66 © Bundesdruckerei Berlin