DE412047C - Remote starter for electric motors - Google Patents

Description

The present invention relates to a remote starter for starting engines of all kinds, which are suitable for direct, alternating and three-phase currents, and which is provided with a zero voltage release, which switches off the motor as soon as the line is de-energized or the voltage drops below a certain minimum, but the new starter immediately and automatically adjusts itself so that it can be used at any time switches the motor on again without further ado under normal voltage conditions. so Similar devices are already known, but in these known tilt starters Mercury used to control the contacts for the starting resistance; it has but shown that for high voltage and especially for direct current mercury to the said Purpose cannot be used with complete certainty. With the present Invention is therefore from the use; apart from mercury and the switching movement caused by a float lying in an oil bath, which actuates a peculiarly mounted shift lever, which then in turn automatically, step by step, the current one after the other across the various resistors switches, with all contacts in the oil bath, so that. burning of the contacts and other harmful effects can no longer occur.

In the drawing, an embodiment is shown, namely shows:

Fig. Ι the switched off position and

Fig. 2 the switched on position.

On a base plate α , an oil container c is suspended pivotably in a bridge b or in any other suitable manner, which oil container c can be tightly closed by a cover d. This container c is divided by an only partially continuous partition e into two rooms, one of which is the oil room, while the other forms the switch room. In the oil chamber there is a float / which is suspended in the joint h by means of the lever g; and the shift lever k is suspended from the free arm of the lever g by means of the intermediate lever i. The shift lever k is rotatably mounted on the hinge pin / in such a way that it can also receive a longitudinal displacement at the same time.

A tilting magnet is arranged m c under the oil tank at a suitable location, the armature engages ti c to the container and can move it into the switching position. Further

a hook lever ο is arranged, which is actuated by a magnet ρ and which is triggered by a spring q . The _; The hook lever ο engages over a lug r that sits on the oil container c and initially holds the same in the switched-on position.

The current circuit is now carried out in such a way that both the tilting magnet m j and the magnet ρ receive current 'ίο at the same time by being connected next to one another. . In this way, at the same time the ^Behäl-: ter c from the position of Fig ι in the position according to Fig 2 drawn down, - and j 0 hook lever engages over the nose / 'i and thereby holds the oil container tightly.. In the container itself, this tilting movement causes the; whole oil content passed through small openings in the \ partition e according to the now low-lying side (in the drawing to the left), and thereby is raised, the float / .. The same thereby moving g by the lever, i the gear lever k, so that the latter being depressed. The contacts s ¹ to s ^t5 , the contacts of the starting resistor, are now arranged under the switching lever k; all of which sit in a row, whose down | but stood continuously around a certain | Piece grows. In the shift lever k itself is ^; a correspondingly equal number of recesses t provided at the bottom, which are at the same distance from one another. The shift lever k is now under the action of a spring a; as soon as it is depressed, the first recess t first engages over the; first resistance contact s ¹ and switches ■ over this the current to the motor. When the lever k goes down further, it is displaced by the inclined flank of the contact u ¹ in the longitudinal direction so far that its next recess t engages the second resistance ^{contact s 2} via j. can. Thereby, the lever is further shifted at the same time k in the longitudinal direction, _WO: through the first contact s is interrupted. ¹ As the lever k goes down further: the same effect continues until the last [contact s ⁶ , with which all previous contacts are switched off and the motor receives full current. However, due to the longitudinal movement of the lever k , the contact ν un- is at the same time, as can be seen in FIG. broken, which means that the tilting magnet m, η \ has become de-energized. The magnet ρ, on the other hand, which has a practically insignificant power consumption, remains in the circuit and therefore holds the hook lever 0 in such a position that the oil container c

remains held. As soon as the tension falls below a certain minimum or completely to zero, the 6a magnet ρ also becomes powerless, and the spring q pulls the hook lever 0 back. This frees the container c , and since its other side is made much heavier, it now tilts back into the position shown in Fig. 1, whereby the entire oil content flows quickly over the partition e to the other side. This sinks the float / down, and the levers g and t pull the switching lever k upwards, with the result that the entire switch has returned to its original position. It goes without saying that the purely structural design of the individual structural parts can be changed, which correspond to the respective purpose. The main thing is that the switch lever is operated by the float in such a way that, in addition to its rotary movement, it also experiences a longitudinal displacement and that if the voltage drops too much, the starter triggers by itself and immediately in all its parts moved back to the original position.

Claims (1)

Patent claim: Feman starter for electric motors with zero voltage release and a tilting container moved by means of electromagnets, characterized in that in the container (c) which contains all the switching elements and is partially filled with oil, a swiveling suspended container (/ j) is arranged which is controlled by a two-armed lever (g) and a connecting lever (i) actuates a spring-loaded switching lever (k) which is displaceable on its pivot point in the longitudinal direction and which is ^{pressed down on the resistance contacts (S 1 MsS 15} ) in such a way that these one after the other and up to the penultimate one Contact can also be switched off again, at the same time the toggle magnet (jn, ti) is switched off, while the zero-voltage magnet (p) remains energized until the hook lever (0) operated by it is pulled back by spring action due to an excessive decrease in the voltage and releases the tilting container so that it tilts back and only when entering t correct voltage is pulled down again by the toggle magnet {in, ii). 1 sheet of drawings.