SU4909A1 - A device for sharing several subscribers with the same two-wire line in a telephone network system with a central battery - Google Patents

Description

The present invention aims to enable several subscribers of the telephone network with a central battery to share the same two-wire line. The number of co-owners can reach up to eight.

FIG. 1 and 2 depict diagrams of two subscriber devices and a partial diagram of the central station.

Each subscriber is supplied with a telephone set which comprises the following parts:

1) Call Sound. - It consists of two electric magnets: polarized / 7 and neutral H, and I, thanks to the spring C, keeps the measles at the cores of the neutral electric magnet. Each of the e-magnets is equipped with two coils, with one half of the winding laid on one coil, and the other half to the second. 2) The valve device K- - It contains a polarized electric magnet / 7i and a neutral electric magnet // 1, where the spring Z / is adjusted so that the measles I rotate around the axis O can hold or in the position shown in the drawing, or in the state of attraction to the cores of the electric magnets; in the first case, contacts 1 and II will be closed, in the second they are open. Both one electric magnet and the other are equipped with two coils, each coil containing half of the winding of its electric magnet; In addition, each of the half windings of a polarized el / magnet / 7i is divided into two sections.

3) The induction coil, the microphone, the microphone M, and the telephone T, all of which have a device that is commonly used in devices of the central battery system.

4) Telephone lever A — When the microphone is removed, which position is indicated in the drawing, the lever closes contact 111; when the microphone is suspended, both the contact III and the contact IV are open; this

the latter closes for a short time only when the lever moves from one position to another, i.e. when removing the microtelephone or hanging it; 5) Group buttons A and B.-These last ones in a restless position close contacts V, VI, VII and VIII, respectively, and in working position contacts IX and X. b) Capacitors C and Cj, the purpose of which will become clear from what follows. 7) Terminals 1-8, which serve for a certain connection of the windings of the bell Sv and the valve device K between each other, on the one hand, and both linear wires L, L and earth, on the other hand, in each of the 8 co-owner devices this connection (setting) is special. All subscriber units are connected in parallel to the same two-wire line LL, which connects all co-owners with the central station; but, except for the LF line, all subscribers and owners should be interconnected using a local line of two wires L and L.

The operation of the entire system is based on the use of 4 different circuits, which can be made up of both the linear wires L and L and earth, and in each of these circuits either the current of one direction or the other can circulate. One of the linear wires participates in two of the circuits just mentioned, i.e. L or L, and earth as a return wire; In the third circuit, both linear wires (without earth) are involved, and finally, in the 4th circuit, both wires connected together are the straight wire and the ground wire is reverse. A current of one or another direction can circulate in each of the circuits, so that a total of 8 combinations are obtained, each of which drives one specific bell and 7 valve devices (in all other devices). Such an action is achieved due to the different setting of all 8 devices, which is performed as follows: the upper end of the upper section of the right coil of the electric magnet / 7i is connected to the upper end of the winding of the right coil of the electric magnet II .-magnet / 7 is connected to the upper end of the winding of the left coil of the el-magnet / 7; the lower end of the winding of the right coil of the electric magnet H is connected to the upper end of the winding of the right coil of the electric magnet H; the lower end of the winding of the left coil of the electric magnet // is connected to the upper end of the winding of the left coil of the electric magnet //; the remaining 8 ends of the windings just mentioned are connected to terminals 1-8, which serve as the actual setting. The purpose of this last is such a connection of the above windings, so that with each combination of currents in one particular device the bell will act, and in all 7 other valve devices. At the same time, according to the principle „settings, all 8 devices can be divided into two groups: the first one includes those devices whose calls work from combinations -} - Л; - L- -L, i.e. from combinations in which only one line wire is disposed of in each individual case; The second group includes those devices whose calls work from combinations L1 - - D - F - L, Y7, Lo, - L - L.2, i.e. from combinations in which in each case both linear wires are utilized. In this case, the combination of currents, which actuates the bell of this apparatus, should at the same time actuate the valve devices of the other apparatus.

In the first group of devices, the connection of terminals 1-8 is made so that both the upper windings of the polarized electric magnet P of the valve device K and both windings of the polarized electric magnet / 7

The ringing sound Sv appeared in a serial connection, after which the resulting continuous winding is connected between the ground and one of the L OR L wires, the connection of terminals 1–8 and then the resulting continuous winding between the ground and the line wire must be considered with the combination of currents to which This unit is configured, i.e. need to keep in mind the circuit and the direction of the current. All the windings of the neutral electric magnet H of the valve device K and the neutral electric magnet H of the bell Sv also need to be connected so that one winding is obtained, the ends of which are then connected between the ground and one of the linear wires, namely remained free after turning on the windings of both polarized e-magnets / 7 and the windings of both coils of each of the e-magnets // and // must be connected so that the action of the current, regardless of its direction, is added. The drawing shows one apparatus No. 3 “tuned to the combination of currents -f-L1.

As for the second group of devices, here the connection of terminals 1-8 is made so that, on the one hand, the top winding of a polarized el-magnet / 7i, the right winding of an el-magnet / 7, the right winding electric magnet //, and the right winding of the electric magnet H, and, on the other hand, the left upper winding of the electric magnet / T, left the electric winding of the electric magnet / 7, left the electric winding of the electric magnet //, and the left winding of an electric magnet //; therefore, after the just-mentioned connection of terminals 1-8, two continuous windings are obtained, each of which is connected between the earth and the corresponding line wire; in this case, it is necessary to count with the circuit and direction of the current, as in the case of setting up the apparatus of the first group.

The drawing shows apparatus No. 1, tuned to a combination of currents — L. Both lower sections of the magnet winding // j are not involved in the tuning, and they are turned on in all 8 devices on the same bases, as shown in drawing.

The central station should have a pulsating DC generator, and each workplace should be equipped with a set of 8 buttons to send the above 8 combinations of currents from both directions to the line (only 2 buttons are shown in the drawing: for sending a combination of currents L2 and No. 3 - for sending - {- L); otherwise, the central station scheme is not affected. When a co-owner subscriber (for example, Nfe 1) calls, he removes his handset and presses one of the group buttons (for example, B). Then the current from the central battery C grounded by one pole goes through the wire L - contact 1 - measles I: - axis O - button B - contact X - wire L - lower right section of the winding of the electric magnet / 7 valve device To all devices, except for the caller, - contact VIII - contact VII - to the ground (the current will not flow to the winding of the calling apparatus because pressing the button B interrupts the contact Vlil, i.e. the ground is turned off). As a result, due to the magnetism magnification in the magnet / 7i, the valve devices K of all devices, except for the caller, will work, i.e. pins I and II are interrupted, and, in addition, a signal is received that is busy (this signal is not shown in the drawing); The design of contacts I and II is such that their interruption occurs already after the measles i are sufficiently close to the cores of the magnet / 7, and will be retained by the magnetism of the latter in this position and after the interruption of the current in the above

chains. The break of contacts I and I has the effect of completely turning off the device; consequently, since the moment of the occurrence of the signal that the co-owner subscribers are busy, neither can they eavesdrop, nor interfere with the conversation. In addition to the just mentioned effect on all valve devices, the current of the central battery B will cause the central station to receive a normal ringing signal corresponding to the grounding of the Lo wire, and then interrogate the subscriber, connect it to another subscriber and talk (during a conversation the telephone current goes from L through contact II - measles I - contact Y - primary winding of the induction coil I - microphone M - contact III - lever P - contact VI - axis O core I - contact I - to wire a) between them takes place in an ordinary way. After the call is over, the co-owner subscriber hangs up his microphone on the lever, and in this device, contact IV closes for a short time. Then the current from the central battery B goes to wire L - contact 1 - measles, - axis O - button B - contact VI - lever P - contact IV - wire L - lower left section of the winding of the electric magnet / T of all devices-wire L - to the other pole of the battery, whereby the direction of the current is such that the magnetism of the polarized el. magnet P will weaken. As a result, in all devices, measles I will move to my normal position indicated in the drawing, that is, pins I and II are closed, and the signal that zan then disappears.

In the following, the current transmission is considered when one of the co-owners (for example, No. 3) is called from the central station. The calling process consists in that the telephone operator inserts the ring plug SW into the socket, then presses the corresponding button (in this case Jf 3) and finally translates the key D

in the call position. As a result, the current will go from the positive pole of the generator Y - through the pressed button 3 - the quiet button JMb 1 - the pressed key D - the head of the pin Shv - the spring of the socket - L - then (in all 8 devices) - through contact II - measles I - spring Z / 1 - capacitor C - terminal 1, after which the current passage will be special for each device, depending on which combination of currents this device is “configured”; therefore, the current passage for apparatus # 3 is first considered. From terminal 1, the current will go further through the upper right winding of the electric magnet P - the right winding of the electric magnet / 7 - terminal 2 - terminal 3 - the left winding of the electric magnet / 7 - the left upper winding of the electric magnet / 7, - terminal 4 - to earth, which returns (via the pressed JMb 3 button) to the negative pole of the generator Y. As a result, the magnetism of a polarized electric magnet / 7 ring Sv amplifies, and a polarized electric magnet / 7 valve device K weaken; the windings of the neutral e-magnets // and / 7 will remain completely without current, which in aggregate will force only the bell to start working, while the valve device K will remain in the position indicated in the drawing. In all the other 7 devices, the current passage will be such that, conversely, the valve devices will work, and the bell will remain at rest, as can be seen by checking, for example, the current passage in JM 1. In this last, starting from terminal I, the current will go to the upper right winding of the electric magnet / 7 right winding of the electric magnet / 7 - terminal 2 - terminal 5 - the right winding of the electric magnet // i - the right winding of the electric magnet H-terminal 6-to the ground, by which it returns (via the depressed button N ° 3} to the negative pole of the generator U. As a result, the bell of Sound-device No. 1 stop Nets alone, for, though here and the floor