DE287019C - - Google Patents

Description

IMPERIAL

PATE NTA Μ '

PATENT LETTERING

JVi 287019 CLASS 74Ä. GROUP

Patented in the German Empire on December 19, 1913.

The present invention relates to an electrical telecommunication device for telecommunication of water levels and the like, in which by sudden changes in resistance at the encoder with the help of the Wheatstone bridge circuit and one in the bridge wire, a motor in the event of a resistance difference controlling relay causes automatic resistance adjustment at the receiver.

Several facilities for the same purpose have now become known, which are also controlled by a relay in the bridge wire of the Wheatstone circuit Motor should bring about resistance compensation in the receiver as soon as there is a change in resistance in the encoder. However, none of the previously known institutions has taken into account

ao that in practical operations it is almost never a question of telecommunication to a reliable relay contact formation sufficiently fast and evenly rising or falling of the liquid level, but rather the changes in liquid levels are usually extremely irregular and it can happen that the difference in height with simultaneous emptying of the container on the one hand and replenishment on the other hand for hours only by a few Centimeter fluctuates. In such a case, the telecommunications lines that have become known up to now would be used Unnecessarily working continuously, as the sinking of the float soon threatened it Kontaktwerk resistance switches on, soon switches off again when the float rises by only a small amount, depending on the Contact arm of the contact work just one contact of the step resistor touches or leaves again in the next moment. It is clear that such operated Telecommunication devices have to become unusable in the shortest possible time and only barely decipherable Can provide diagrams.

In contrast, the present device has the significant advantage that the Changes in resistance at the encoder only at certain intervals and then suddenly take place in leaps and bounds, any fluctuation in the liquid level between these intervals but does not cause a change in resistance. Accordingly, the relay is in the bridge wire only then respond and run the motor for resistance adjustment at the encoder set when the fluid level changes by a very specific, sufficiently large difference has increased or decreased compared to the previous level.

In the accompanying drawing, the new telecommunication device is in an embodiment has been shown schematically and will be discussed in more detail here:

A Gober A and a receiver B are connected to each other by lines 23, 24 and earth odor genieinschaftliche return line 2 , their resistors ab or cd form the bridge branches of a Wheatstone circuit, in the bridge wire 2 is the sensitive moving coil relay 4; between the wi-

Claims (1)

resistors bc and ad are connected to the Bctriobsbatteric 32 via lines 31. A sliding contact 25 controlled by the float 28 at the transmitter A corresponds to a counter sliding contact 4 at the receiver that is driven by an electric motor when the relay 3 responds. The sudden change in resistance at the encoder is shown in the drawing the illustrated embodiments as follows: Is achieved by raising or lowering the float 28 carried by the liquid or the counterweight 33 rotates the cord pulley 35, this is set by a shaft 34 with the pulley 35 connected gear 36 the drive wheels 15,16 or with this again by a different shaft 37, 38 connected locking pawls 17, 18 in reverse ao rotation. Depending on whether the cord disc 35 now turns to the left or to the right, is now either the pawl 17 or the pawl 18 behind the locking cone of the associated Take the drive plate 7 or 8, the Also advance shaft 39 or 40 while rotating and now lift either the holdover weight 9 or 10. Is sufficient lifting occurs, the weight 9 (or 10) tilts over while the shaft 39 (or 40) rotates and falls back into the resting position. In this case, however, it is also connected to the shaft 39 Thumb 13 (or thumb 14 connected to shaft 40) that is a special one Detected shaft 41 rotatable gear 11 and rotated around a certain angle. This angle of rotation of the gear 11 is but of course dimensioned so that the through the drive wheel 12 with the gear Inevitably connected sliding contact 25 is switched up or down by exactly one resistance level will. If the sliding contact 25 at transmitter A has been moved abruptly in the manner just described, the bridge relay 3 at receiver B naturally responds immediately, closes contact 29 or 30, depending on which, and controls the electric motor 1 with the help of the intermediate relay 5 or 6 in one or the other direction of rotation. The motor ι sets the counter-sliding contact 4 in motion by means of the drive wheels 27, 26 and 21, and this is now continued in the corresponding direction until it is again the Has brought about bridge equilibrium. At the moment when the bridge equilibrium is reached again, the contact needle of the bridge relay 3 returns to the rest position, as does the intermediate relay 5 (or 6), and motor 1 stops. To ensure that the contact closes safely to reach the receiver sliding contact 4, its adjustment can also be more or less by leaps and bounds with the help of any - in this case more inconsequential - means. As can be seen, with the abrupt adjustment of the encoder sliding contact described 25 no unnecessary or unsafe work of the telecommunication system takes place, rather, this will only come into operation and by adjusting the sliding contact indicate or indicate a change in the fluid level to the recipient. register with the help of known suitable devices, if in fact a very specific one There has been a change in the liquid level compared to the previous level Has. Instead of using the means described here, using hold-up weights etc., it goes without saying that also the step-by-step switching of the encoder loop contact with any appropriate other means. Instead of telephones with a Wheatstone bridge circuit, the Invention can also be used for any other telecommunication device, in which there is a sudden change in resistances in a differential circuit Giver acts. Sponsors τ-An SPRU ch: Electrical remote indicator with Wheatstone bridge circuit for remote water level reporting and similar purposes, in which the simultaneous change of two branches («, b) of the Wheatstone circuit, caused by a float or its counterweight, at the point to be monitored (A) automatically changes by one the controlling point (B) , set by the Brückcnrelais in action, the crank of a counter-resistance controlling motor is compensated, characterized in that to achieve safe operation and the least possible wear, the switching of the crank (25) of the transmitter resistance (a and b) I) ZW. the change in the two resistances (α and b) of the resistance circuit is brought about step by step with the help of suitable organs at the moment in which the float has been raised or lowered by a certain amount. For this 1 sheet / υϊοΐιηυημοη.