DE1027249B - Step-by-step selector with protective tube contacts - Google Patents

Description

The well-known protective tube contact, as described, for example, in US Pat. No. 2,289,830 is, is characterized by the fact that it is protected against contamination, since its contacts in a glass tube are melted down. However, this arrangement of the contacts makes their mechanical actuation not possible. The closing of the contact is therefore caused by an externally imposed magnetic field causes. The entire arrangement thus represents a relay.

The invention shows a way how the special properties of the protective tube contact also for Gradually switching voters can be exploited. This is done according to the invention in that each Protective tube contacts assigned to the selector step are arranged along a path that gradually extends from a magnet is passed through which, with each step, the protective tube contacts assigned to this step actuated.

The path can run in a straight line or in a circle, and you then get a scene selector accordingly or a rotary selector. In the latter case, the magnet is to be arranged to be pivotable about an axis of rotation.

If several protective tube contacts are assigned to each selection step, there are either several magnets To move past several protective tube contacts at the same time or to provide suitable guide elements for the fact that the magnetic flux emanating from a magnet is assigned to all of the relevant selector step Protective tube contacts is fed at the same time. Such management bodies are z. B. magnetic conductive busbars, in particular sheet metal strips, which are magnetically connected to the two ends of the protective tube contacts are conductively connected and are always excited by the .Magneten when it is on the relevant voter step.

In order to accommodate as many voter steps as possible in the smallest possible space, it is advisable to arrange the protective tube coutacts and, if necessary, the guide elements of each voter step next to one another or one above the other in a plane which is perpendicular to the path of the magnet, i.e. H; in the case of a linear path parallel to one another and in the case of a circular path radially to the axis of rotation of the selector arm. So that the selector steps are the same, the distances between these planes or the angles that they form one after the other are chosen to be the same. In the case of protective tube contacts arranged one above the other, it is space-saving to arrange these with their longitudinal axes horizontally in several planes one above the other, in the case of rotary selectors in particular radially to the axis of rotation. If, in this case, the flux guiding organs are dispensed with, there are several magnets above or below step-by-step switching selectors
with protective tube contacts

Applicant:
Siemens & Halske Aktiengesellschaft,

Berlin and Munich,
Munich 2, Witteisbacherplatz 2

Friedrich Sommer, Werner Lehmann,

Raimund Reiter and Werner Cordt, Munich,

have been named as inventors

to arrange the protective tube contacts in a corresponding number of levels. It is advantageous to choose between each two protective tube contacts to arrange a selector arm with the contacts actuating the protective tube contacts, since every second swivel arm can be saved.

Further features of the invention are explained in more detail using two exemplary embodiments.
Fig. La represents a side view and
1 b shows a plan view of the rotary selector with protective tube contacts, in which the longitudinal axes of the protective tube contacts run parallel to the axis of rotation of the selector and the protective tube contacts are actuated by a single magnet with the aid of magnetically conductive guide members;

Fig. 2 a shows a side view and

2b shows a top view of the rotary selector with protective tube contacts represents, in which the longitudinal axes of the protective tube contacts perpendicular to the axis of rotation of the Selector run and the protective tube contacts of each plane of rotation are operated by their own magnet will.

In the case of the voter according to FIGS. 1 a and 1 b, four with their longitudinal axes are parallel to one another per voter step standing protective tube contacts 1 provided, both ends of which are magnetically conductive, but electrically isolated with guide members 2 are connected, each consisting of two angular sheet metal strips from magnetic There are conductive material and thus two magnetically conductive busbars for the protective tube contacts of a voter step. The other ends of the metal strips are under each other Preservation of a gap compared to that of a permanent magnet 3, whose polarity is determined by the Letters ^ V and 6 "is marked at his

709 95S / 157

Setting on the relevant voter step is currently being filled out. The magnetic flux then proceeds from the poles of the magnet over the sheet metal strips to the contact springs and magnetizes all associated Protective tube contacts with opposite polarity in pairs; these are thus operated in a known manner and close each connected electrical circuit.

■ The protective tube contacts 1 or the spaces between the guide organs 2 are along a circular Track 4 is arranged, which is identical to the track that the permanent magnet 3 traverses about the axis of rotation 5, when it is moved by drive elements not shown, for example a known stepping mechanism will.

In Fig. 1 b is a section of the possibility of movement of the magnet 3. Depending on how many steps are required, one can extend the circular path and up to a full one Close circle. As can be seen, the protective tube contacts 1 assigned to a step lie with the associated management organ2 each in a level, these levels successively with the same Angular displacement are arranged radially to the axis 5 of the circular path 4.

In the case of the selectors according to FIGS. 2a and 2b, 4 protective tube contacts 1 are also provided for each selector step. Four horseshoe-shaped magnets 3 are arranged on circular tracks 4 one above the other and pivotable about an axis of rotation 5. Two magnets are carried by a voter arm. The longitudinal axes of the protective tube contacts of a selector step run parallel to one another and perpendicular to the axis of rotation 5 of the selector. A protective tube contact is located above and below the path common to the two magnets of a selector arm. The magnets can be made up of several parts, for example two magnets N and 5 ¹ and a carrier 6 that connects both magnetically. However, the carrier 6 can also be permanently magnetic; the parts N and 5 "then only need to be magnetically conductive pole pieces. Furthermore, instead of the two supports 6, a single magnet can be arranged horizontally on a selector arm, which is equipped at both ends with pole pieces protruding upwards and downwards When they are set to a selector step, magnets actuate the protective tube contacts assigned to this selector step in a known manner.

Instead of a permanent magnet, you can also use an electromagnet. You turn it on depending on the setting of the voter on a certain step, this is how to avoid it a possibly undesired, brief actuation of contacts that occurred before the desired voter step can be overrun.

Claims (8)

Patent claims: 1. Gradually switching selector with protective tube contacts, characterized in that each Protective tube contacts (1) assigned to the selector step are arranged along a path (4) which progressively is traversed by a magnet (3), which is assigned to this step at each step Protective tube contacts actuated. 2. Selector according to claim 1, characterized in that the path (4) of the magnet (3) is circular runs around an axis of rotation (5). 3. Voter according to claim 1 or 2, characterized in that a plurality of a voting step associated protective tube contacts (1) are associated with common, magnetically conductive guide elements (2) which are associated with the outgoing from the magnet (3) Magnetic flux at the same time when it is set to the relevant selector step Bring up all assigned protective tube contacts. 4. Voter according to claim 3, characterized in that two magnetic guiding organs conductive sheet metal strips are provided, which protrude at one of their ends with the protruding from the protective tubes Contact ends are magnetically connected and the other ends of each other Preservation of a space opposite to that of the magnet (3) when it is set is currently being filled in on the relevant step. 5. Selector according to Claim 3 or 4, characterized in that the protective tube contacts (1) and the associated ones associated with a selector step Guide organs (2) each in a perpendicular to the path (4) of the magnet (3) Level and that these levels are equally spaced from one another along the path. 6. Selector according to claim 2, characterized in that the longitudinal axes of the protective tube contacts (1) run radially to the axis of rotation (5) and assigned the longitudinal axes of the various steps Protective tube contacts form the same angle with each other and that the track (4) of the magnet (3) runs above or below the protective tube contacts. 7. Selector according to claim 6, characterized in that each step has a plurality of protective tube contacts (1) and several magnets (3) are assigned one above the other, in a radial direction to the axis of rotation (5) are arranged level, and that the tracks of the magnets between two superimposed Protective tube contacts run. 8. Selector according to claim 7, characterized in that the magnet (3) consists of several parts (N, S) which are arranged on a magnetically conductive carrier (6). 1 sheet of drawings © 709 958/157 3.58