DE1575217C - Locking device for the movable part of an electrical switch - Google Patents

Description

If the components are in the form of arc-shaped levers, i.e. the shape of circular ring sectors, each of the levers around a joint tip at one end are rotatable and bear in the vicinity of these ends in locking elements.

Fig.l shows a longitudinal section through the relevant Embodiment and

2 shows a cross section along the cutting plane -II in Fig. 1.

In the case of the locking device according to this embodiment, the first part consists of the initially introduced • mentioned locking device from a stutini, which is provided with a bumper 3. In the locked state, this connecting piece 1 is within nes cup-shaped body 4 (second part). The cutzenl is equipped with a groove 2 into which locking elements 6 are pressed through recesses 5 in the wall. This is done with ner annular spring 7, via magnetizable circular arc-shaped components 8. To solve the locking device must be the connector 1 in F i g. 1 can be moved upwards. The locking elements 6 are then slanted through the lower Flank of the groove pressed outwards. As a result, the magnetizable swivel bracket 8 rotate their pivot pin 10 slightly so that the annular spring 7 is tensioned. In absence of a magnetic field, i.e. without occurrence of a short circuit, the magnetic circuit becomes which

ίο through the magnetizable elements 8 and the air gaps 9 is formed, not excited and the tensile force of the force threshold is constant.

However, when the magnetic circuit is excited by a short-circuit current, so the air gaps 9 penetrated by magnetic fields, which counteract the rotary movement of the elements 8 to the outside and thus cause an increase in the response value of the force threshold. The excitement of the magnetic circuit 8.9 can be done in different ways.

1 sheet of drawings

Claims (2)

ken through recesses in the wall, of the second patent claims: part. In the locked state of the switch, the first part lies within the second part in such a way that 1. Locking device for the 'movable that the rods engage in the groove of the first part, chen part of an electrical switch with a 5 If the electrical switch in question, the one equipped with a force threshold, containing two axially relative to one another movable locking device of this type Parts, in which locking is to be opened, must first be applied such a luügsvorrichtung the first part in the locking mechanical force that the state lies within the second part and the rods against the force of the tension springs from the groove of the first Part can be pushed out with a first part running along its circumference. The size of the groove is provided, · in which groove one or these power waves _; which must first be overcome several locking elements by the force depends exclusively on the tension of the spring to be pressed, namely by the between the rods and also from the recesses in the wall of the second part towards the cross-section of the groove and the shape the Verriedurch, characterized in that 15 gel elements. a magnetic circuit made up of several of the ma- A similar purely mechanical locking device gnetic lines of force of the switch current through direction, which are set from the French patent and are known for the lines of force hmtereinanader 897 244, differs from the classified components (8) made of magnetizable locking device mentioned above only because material with air gaps (9) between These 20 by the fact that the locking components (8) are made up of a single ring-shaped spring, that these components (8) press downwardly inwardly in the radial direction right to the circumferential direction of the magnet, which are in the form of spheres.
Circle are movable and to the locking Finally is from the British patent elements (6) are in contact, with a locking device known in the event of a short circuit 725 361, the components (8) of the magnetic circuit of 25 in which also the locking elements on the Field stronger acting on the locking elements force is constant, but there from elements (6) are pressed, so that the to a constant current fed electric power off of the switch to be overcome is supplied. Force threshold receives a higher value. The problem on which the invention is based 2. Device according to claim 1, characterized in that if a locking device indicates that the magnetizable components initially mentioned in the first place is applied to an arcuate lever (8) in the form of a circular electrical switch,
ring sectors are soft levers at one end in the event of a short circuit in the relevant one are rotatable about a pivot pin (10) and enter the circuit equipped with the switch the vicinity of these ends to the locking elements 35 namely electrodynamic forces which the elements (6) are applied and that the components of the switch strive to open. If at this magnetic circuit of an annular force increase the holding force of the force threshold via spring (7) are enclosed. is stepped, the switch is opened, but what is undesirable, since you of course each circuit 40 and therefore each switch of the control Overcurrent relay wants to subordinate or wants to operate arbitrarily, the switch concerned against it may not open in an uncontrolled manner in the event of a more or less large overcurrent or short-circuit current. the The invention is based on a purely mechanical choice of a higher force threshold, i.e. a stronger one see locking device with a force-tension pressure threshold on the locking elements, containing two springs that are axially bent relative to one another, however, a heavier conway would be Parts in which locking device require struktion. the first part in the locked state within the. The object of the invention is thus that of second part is and the first part with a longitudinal 50 creating a locking device for a its circumference is provided extending groove in electrical switches avoiding such which groove one or more locking elements of heavier constructions. elements are pressed in by the force of a spring. den, through recesses in the wall of the would be a magnetic circuit from several of the second part through. An interlocking device traverses the magnetic lines of force of the switch current of this type is from the Dutch patent application and for the lines of force arranged one after the other 65/00779, Fig. 2 b and Fig. 2 c (German components made of magnetizable material with Auslegeschrift 1 223 015) known. There are air gaps between these components, there In the known device, which is also intended to be movable perpendicular to the circumferential patent application in connection with the direction of the magnetic circuit and an electrical switch, which are in contact with the locking elements, in the first part and the second part The components of the magnetic Kreiander movable switch parts are fastened to relatively zuein- short-circuit trap and both ses of the magnetic field are stronger on the locking parts in the locked state between two management elements are pressed so that the mutually parallel rods that act as a locking 65 switching off force elements to be overcome act on the switch and their ends are given a higher value by tension springs,
are connected to each other. The middle parts of this case in the following with reference to FIGS.] And 2 Rods are located inside the second part and the embodiment described in the drawing