DE1028664B - Electrical switchgear - Google Patents

Description

GERMAN

There is a need for many electrical switching tasks, depending on mechanical given or electrically generated (e.g. by relay aniker) shifts not only momentary switching on or off of voltages or To carry out currents, but also to carry out delayed switching on or off or for a short time effective contact closures or openings (so-called Wiping contacts).

The invention has the object of providing a universally all of the above requirements individually or in any combination fulfilling simple device to accomplish.

The core of the invention is one with two, preferably parallel, opposite one another Chamber with movable walls, the interior of which communicates with the outside air via an air throttle communicates. The walls should be resettable through their own elasticity or through spring forces acting from the outside be. The movement of the walls should directly or indirectly shift contact electrodes will. A shift from the outside is to be initiated in one of the walls, in particular the Displacement of the armature of a relay. To describe the effectiveness of such an arrangement, refer to refer to Fig. 1. Here 1 and 2 are the movable walls. They are designed as elastic membranes, which have a tendency to return to their original position. With the membrane 1 is the Contact electrode 3 connected ,, which is preferably elastically connected to the membrane 2 contact electrode 4 faces. Also connected to the membrane 2 is the contact electrode 5, which the spatially fixed contact electrode 6 faces. 7 is an air throttle through which the inrien space of the membrane 1 and 2 closed chamber communicates with the outside air. Will the membrane 1 suddenly shifted in the direction indicated by the arrow, for example through the lever 8 When the relay indicated in the figure is actuated, the movement of membrane 1 is transmitted via the air cushion between the membranes also on the membrane 2. There is immediate contact between the electrodes 5 and 6. But to the same extent as the air cushion by escaping of air from the chamber loses its tension to the outside through the throttle 7, the membrane reverses back to their outer position, and the contact between electrodes 5 and 6 is broken. Instead, after a time predetermined by the throttle has elapsed, a Contact between the electrodes 3 and 4. The electrodes 5 and 6 are only effective for a short time Contact, a so-called wiper contact, the

Electrical switchgear

Applicant:

Askania -Werke Aktiengesellschaft,
Berlin-Friedenau, Bundesallee 86-89

Walter Fabian, Berlin-Charlottenburg,
has been named as the inventor

Electrodes 3 and 4 give delayed contact. The in. Examples of contacts that occur are working contacts. You can get through it without difficulty Replace normally closed contacts. It can also be. Combine make contacts and break contacts as desired. It is by no means necessary, the contact electrode !! right away to be attached to the membranes. Their displacement can also be carried out indirectly via any, in particular kinematic transmission means take place through the membranes. Sometimes it can be desired be able to let the membrane 1 return very quickly from its displacement to its starting days, without, however, the position of the membrane 2 and the contact electrode controlled by it !! through this is changed noticeably. Sometimes it is also desirable that after the return of the membrane 1 in their starting position is immediately restored to a new readiness state of the entire switching device is. This includes that the air pressure inside the chamber immediately matches the air pressure outside the chamber Chamber is aligned. This compensation would be achieved by a subsequent flow of outside air via the throttle 7 only take place with a delay. In order to enable an immediate old match, the check valve 9 is therefore intended.

For the function of the switching device it does not matter in which way the mobility the chamber walls and the throttle can be implemented constructively. . You can also use an embodiment Select according to Fig. 2. This is where the functions slide of a piston taking over part 10 in the part 11 taking over the functions of a cylinder. Thieves However, parts slide into one another with such a play that there is sufficient air through this play Dimensions, but can pass through throttled. The parts 10 and 11 are expediently by means of return springs tie them elastically to their starting position. Purpose Setting of certain active times of the wiper contact or certain delay times of the

809 507/294

With the delay contact, the throttle can be adjustable.

Claims (8)

Patent claims: 1. Electrical switching device, characterized by a throttling with the outside air via a Communicating cross-section, chamber with two movable walls (pneumatic Chamber) and from. the displacement of the walls controlled contact electrodes. 2. Electrical switching device according to claim 1, characterized in that the pneumatic Chamber with two membranes as movable! Walls is provided. 3. Electrical switching device according to claim 1, characterized in that the pneumatic Chamber made up of a cylinder and a cylinder with an air-permeable, but air-throttling one Game moving piston consists. 4. Electrical switching device according to the claims. 1 to 3, characterized in that all or some of the contact electrodes are located inside the pneumatic chamber. 5. Electrical switching device according to the claims 1 to 4, characterized in that the movable walls of the pneumatic chamber directly (inherent elasticity) or indirectly (through springs acting from the outside) elastic are resettable. 6. · Electrical switching device according to the claims. 1 to 5, characterized in that the throttling cross-section over which the interior the pneumatic chamber communicates with the outside air, is adjustable. 7. Electrical switching device according to claims 1 to 6, characterized in that one of the walls of the pneumatic chamber is rigidly or elastically coupled to the armature of a relay is. 8. Electrical switching device according to the. Claims 1 to 7, characterized in that the interior of the pneumatic chamber except about the throttling. Cross-section still about a non-throttling, but one in one or the other Communicates direction effective rollover valve containing connection with the outside air. Considered publications:
Swiss Patent No. 190 812;
French patent specification No. 1 034 903. 1 sheet of drawings © 809 507/294 4.58 ■■ «i ■