DE583006C - Inductive device for the transmission of characters from the vehicle to the track - Google Patents

Description

There are various facilities to convey signs from the train to the track, z. B. with overpass signals and train closure detectors, one provided on the train Iron mass, e.g. B. a wheel of the train or a magnet arranged at the end of the train, inductively on the track facility acts.

It is also known that there is a resonance in the transmission of signals from the track to the train between two oscillation circuits, one of which is arranged on the train, the other on the track. Here you need higher, at least • 15 medium frequencies to work at high speeds of the train to achieve a reliable response to the facility and also to produce different displays can e.g. B. depending on the position of the signal

zo influence or not. For . the transfer of characters from the train to the For the purpose of the train closing report, similar facilities have not yet become known. On the other hand, one has for axle counter already proposed to arrange a resonance circuit on the line. Here is However, it does not matter whether you use the closed-circuit or the open-circuit principle is working. The invention is based on the fact that for a train closure message of the resonance circuit in connection with the open-circuit principle basic novel and advantageous design results. The following considerations are necessary for this decisive:

While you have to work with train control devices with quiescent current and unnecessary power consumption is avoided here by the fact that the power source represents The generator is driven by the locomotive, i.e. it is only used while the train is moving the route clearance with quiescent current occur a permanent power consumption, since in the In most cases the power source would have to be provided on the route.

The invention is based on the knowledge that it is just expedient for traction alarms not to use quiescent current, but working current as this way any faults caused by line breaks can be avoided in the same way as with one Train influencing device by using idle current, and that it is also expedient to have a resonance circuit on the line to use. With the train you can either use an iron core or also provide a resonance circuit. If working current is used now, the load becomes the power source is almost exclusively limited to the moments of influence, so that the power consumption is

*) The patent seeker stated as the inventor:

Otto Schirm, in Berlin-Halensee.

nism moderately low and thus the system can be operated economically can. Accordingly, the invention consists in using the inductive route release a resonance circuit is effected in all circuits according to the open-circuit principle.

A resonance circuit on the train will be provided especially in those cases ίο where there is a risk that the route resonance circuit will be arbitrarily influenced by any iron body can be brought about.

For the assessment of the present invention it should also be taken into account that when Train influencing devices made a sharp distinction between influencing and not influencing cases must be, which is not possible with lower frequencies.

In contrast, in the devices to which the present invention relates, it is not necessary to differentiate between an influencing and a non-influencing case, because the influence always occurs when the iron cores cross the resonance circuit should be evoked; and besides, it is in the influence of iron masses the zone of influence is much larger, since it extends over the entire length of the iron mass and extends even beyond. So here you are able to use the technically common lower ones Period numbers (e.g. with 50 periods) to work.

In addition, for the assessment of this question, there is also the fact that the influencing devices, where a signal is to be evoked on the moving train, you can still expect mechanical vibrations must, which in turn prohibit the use of a sensitive relay, so that one So you have to reckon with larger current fluctuations if you do that because of the vibrations robust relays really want to drop. In contrast you can also use very sensitive relays for facilities along the route. in the In the former case, the relay must therefore have a certain inertia so that it does not already in the attracted state follows the constant changes in direction of the alternating current, so vibrates. In the other case, however, where the open-circuit principle is preferred, and the anchor is thus in-fallen in the state of rest Position, the relay can therefore be equipped with very little inertia, which in turn has the consequence that even a single brief impulse switches the relay to Appeals.

You can now also achieve a further improvement in that the resonance circuit along with an insulated rail or a rail contact that normally is operated by the train, can act on the receiving device. Man thereby achieves with greater certainty that unintentional influences on the track facilities prevented by any iron parts not related to the train will.

Another advantage can be obtained by dimensioning the device to be does not work at the minimum of the current reduction, but above or below the minimum, d. H. So, if you deliberately detun the oscillation circuit a bit, there here the difference between the current level before and during the influence becomes much larger.

The subject matter of the invention is explained in more detail in FIGS. 1 and 2.

Fig. Ι shows a train end indicator, in which the track resonance circuit at the same time cooperates with an insulated rail.

ι is the iron core that acts on the winding 3 of the line resonance circuit, the in addition to the capacitor 4, a relay S also contains. The line 21 is isolated over the Rail 22 connected to relay 5 ". Armature 24 of the relay actuates any Circuits and can be provided with a delay device, which in the present Trap z. B. consists of an air buffer 25. Do you want the connection of the resonance circuit Avoid using an insulated rail, so you can influence the resonance circuit by any. Iron body also prevent that one in place of an ordinary iron core 1, such as Drawn dotted, a resonance circle. 26 with capacitor 27 and winding 28 provides. The system is fed by the alternating current source 6.

Fig. 2 shows another example of a tail-end detector, with an example at the same time for the combination of the resonance circuit with a rail contact is given. 11 is one located at the end of the train Iron core. 12 is an iron core arranged on the track, the winding 13 is connected to a capacitor 14 to form an oscillating circuit. This circle will for example fed by an alternating current network 15 and operates on a relay 16. On this relay 16 there is a contact 17, provided that the working current system is used, is interrupted in the idle state of the device and in the event of interference is closed. This contact is in a circuit that is over

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a relay 18 leads. This circuit can either from the remote power source or if a DC relay is used is to be fed by a battery 19. In this circuit there is also a Rail contact 20 which is closed by the wheels of the train. So only if that Contacts 17 and 20 are closed, the relay 18 is affected. To this match to achieve with certainty, one can either choose the rail contact to be long enough, or it can be delayed let work, or else a special one between the contact and the relay 18 Switch on the delay relay, through which only the relay 18 leading circuit is closed. You can also do this instead of a rail contact use an insulated rail.

Claims (1)

Claim: Inductive device for transmitting characters from the vehicle to the track for train end detectors using a resonance circuit on the line based on the working principle. 1 sheet of drawings