DE1087693B - Arrangement for indicating the existence of a magnetic field, in particular for indicating the state of excitation of protective tube contact relays - Google Patents

Description

Protective tube contact relays usually consist of a number of protective tube contacts and one of these surrounding excitation coil. If the excitation coil is energized, it causes that generated by it Magnetic field actuation of the protective tube contacts.

Since the contacts are enclosed by the excitation coil and consequently the contact points are covered, it is not possible to see what state it is in such a relay.

In many cases, however, it is desirable to be able to make such a determination especially when troubleshooting a device that uses a protective tube contact relay Circuit. So far this has been used to either apply the voltage to the excitation coil or to a suitable contact. In any case, this constitutes an interference with the existing one Circuit, which in some cases can lead to undesired incorrect actuation.

The invention shows a way how in a simple manner while avoiding any intervention in the existing circuit the excitation state of protective tube contact relay can be displayed. In addition, the arrangement according to the invention generally serves to determine whether or not to pass of a magnetic field.

To solve this latter, very general problem, one has according to the French patent specification 1 078 192 already uses a principle according to which two magnetizable conductors are provided, which in the Collide rest position, so do not form an air gap in this state. The two conductors are within housed in a non-magnetic housing. If this arrangement is exposed to a magnetic field, repulsive forces act between the two conductors when the magnetic field enters the two conductors magnetic parallel connection. The resulting shift in one of the two conductors is shown the existence of the magnetic field. This principle is specifically based on the solution of the invention task, namely to indicate the state of excitation of protective tube contact relays, unsuitable, because it requires a relatively compact structure that is difficult to accommodate in protective tube contact relays is.

The invention described below avoids this disadvantage. It takes the special design into account of protective tube contact relays, the structure of which involves bringing larger organs closer to their display State of excitement does not allow. The principle is used, according to which two under the action a magnetic field changing their mutual position, having no remanence property Heads are provided; one of which, firmly attached to the arrangement to indicate the existence

a magnetic field, in particular

to display the state of excitation

of protective tube contact relays

Applicant:

Siemens & Halske Aktiengesellschaft,

Berlin and Munich,
Munich 2, Wittelsbacherplatz 2

Dipl.-Ing. Kurt Ziegler, Munich,
has been named as the inventor

ordered conductors by a means exerting a mechanical restoring force against the other conductor is supported within a non-magnetic guide housing. The inventive arrangement is thereby characterized in that the magnetic conductors consist of two rod-shaped parts, which are in one elongated guide part while maintaining an existing air gap in the rest position longitudinally one behind the other are arranged.

The configuration according to the invention provides the arrangement for displaying the existence of a magnetic field a rod-shaped shape with a very small rod cross-section. Such an arrangement can except with protective tube contact relays everywhere with advantage used where magnetic field display is to be made within narrow spaces.

In Fig. 1 a working according to the principle of the invention construction is shown, namely seen from the side;

FIG. 2 shows the flag shown in side view in FIG. 1, seen from the front;

Fig. 3 shows a protective tube contact relay in section with the arrangement according to the invention.

According to FIG. 1, two magnetic conductors, which here consist of two round rods S1 and S2, are accommodated in a tube R made of non-magnetizable material, for example brass, which serves as a guide. These rods can preferably be made of soft iron. The rod S1 is soldered to one end of the tube R , so that there is a rigid connection between the tube R and the rod S1. In contrast, the bar is 5 * 2

009 588/188

mounted displaceably in the tube R. In the drawn rest position there is between the bar Sl and the. Bar-5 * 2 an air gap L.

If this arrangement is now brought into a magnetic field acting at the location of the air gap L , which runs approximately in the direction of the pipe R , the rods 6 ″ 1 and 6 * 2, which act as magnetic conductors, are drawn together. The rod 5 * 2 moves here towards the rod S1 and thereby closes the air gap L. Thus, in principle, there is a display to the effect that in the area of the tube R a magnetic field is acting in its direction.

This display is made clearly visible in the following convenient manner. The side facing away from the air gap of the rod 6 ″ 2 protrudes from the tube R and is attached to a lever system which simultaneously transmits the restoring force and the displacement of the rod to a flag and the bending part B. By shifting the rod S2 in the stable direction (arrow Pl), the pulling part Z is pulled and as a result the bending part, which is supported on one side against the tube R , is slightly bent, creating the restoring force During this movement, the indicator ^ attached to the tension part Z and the bending part B makes a downward movement (see arrow F 2) The arrangement remains in this state as long as the magnetic field exists.

FIG. 2 shows the flag seen from the front, which is partially covered by a mask M shown in dashed lines. The indicator A has an upper white and a lower black field. In the rest position, only the lower black field can be seen through the opening in the mask M. By actuating the arrangement, the indicator A is shifted downwards, as a result of which the upper white field of the indicator A is now visible in the opening of the mask M. A clearly recognizable signaling of the working position of the arrangement has then taken place.

The arrangement described above is therefore in particular for displaying the state of excitation of Protective tube contact relays are suitable because, as explained at the beginning, they come from an excitation coil magnetic field is generated. If the arrangement according to the invention is now brought into the area of this Field, the desired activation of the indicator takes place.

The arrangement according to the invention practically represents a type of probe which has only a small diameter in the region of the tube R , for example 1 * to 2 mm. The tube can therefore easily be pushed into the contact set of a protective tube contact relay in the manner of a probe. This is because there is inevitably a certain space between the individual protective tube contacts, which is left free by the protective tubes of the contacts.

Fig. 3 shows the introduction of the arrangement according to the invention in a protective tube contact relay (drawn in section) with four protective tube contacts. As can be seen, the relay has a contact set of four protective tube contacts K and an excitation coil W. The tube R of the arrangement according to the invention is pushed into the space left free in the middle of the four protective tube contacts K like a probe.

Claims (2)

Patent claims: 1. Arrangement for indicating the existence of a magnetic field, the two under the action of the Magnetic field changing their mutual position, no remanence property exhibiting magnetic Contains head, one of which is fixedly arranged head by a mechanical restoring force exercising agent is supported against the other conductor within a non-magnetic guide housing, -in particular for display of the state of excitation of protective tube contact relays, characterized in that the magnetic Head consist of two rod-shaped parts, which are in an elongated guide part below Compliance with an existing air gap in the rest position are arranged lengthwise one behind the other. 2. Arrangement according to claim 1, characterized in that the guide part consists of a straight, non-magnetizable tube (R) and the two magnetic conductors ^r of two round rods (Sl, S 2), preferably made of soft iron, of which the latter is the sliding one The rod protrudes from the tube (R) with its side facing away from the air gap (L) and is attached to a lever system (Z; B) at this point, which controls the restoring force and. the displacement of the rod (S2) on a flag. (A) transmits. - - -, .- '-' Considered publications:
German Patent No. 827215;
French Patent No. 1078 192;
USA. Pat. No. -2 461,202th 1 sheet of drawings ® 009 588/188 8.60