DE969066C - Relay chain for counting and evaluating electrical pulses in telecommunications, in particular telephone systems - Google Patents

Description

ISSUED APRIL 30, 1958

T 10606 VIIIa12i α ³

Nikolaj Poljak, Prague

has been named as the inventor

The invention relates to a relay chain for counting which is composed of two relay groups and evaluation of electrical impulses in telecommunications, in particular telephone systems, where they makes it possible to evaluate pulses from a series of dialing pulses.

Previously known evaluation chains in relay telephone exchanges are based on the sequential principle. In some cases a relay is used to evaluate two digits each time, ζ. Β. ι and 5, 2 and 6 etc., if the decade is divided into two halves, namely ι to S and 6 to io, whose evaluation is differentiated by a changeover relay. Well-known evaluation chains that do not use two relays to evaluate a pulse, are designed in such a way that their Function either by the relays that make up the chain or by the contacts of these relays is time dependent. Such constructions are very sensitive to a different pulse ratio or a reception speed other than the prescribed one.

The relay chain, made up of two relay groups, for counting and evaluating electrical

709S64 / 3

fresh impulses in telecommunications, in particular telephone systems, is structured according to the invention in such a way that that the first group contains three relays in three-stroke circuit, through their interaction three different switching states of this group can be evaluated, while the second relay group Contains two relays, which are switched in such a way that the three switching states through their interaction of the first relay group can be counted and evaluated in up to ίο in four different ways. The drawing shows an embodiment of the invention.

Fig. Ι is the circuit diagram of a relay chain and the associated evaluation contact field, which is not part of the invention; FIG. 2 is a modification of the circuit according to FIG.

The drawing shows the individual relays

with capital letters and their windings with Arabic numerals and the individual contacts of the Relay concerned with small letters and Arabic numerals.

It can be seen from Fig. Ι that the relay chain according to the invention is composed of two relay groups. The first group consists of three relays W, X, Y in a three-stroke circuit. The second group consists of two relays A, B, whose interaction allows four different switching states to be distinguished. The three-cycle switching of three relays W, X, Y enables a group of three pulses to be evaluated. After the third pulse, the group W, X, Y is returned to the original state, as will be explained below. The group of. the other two relays A, B offer four combinations of different switching states. This group of relays A, B evaluates the individual switching states of the first group. Since the relay group A, B has four different switching states, as already mentioned, it would be possible to evaluate 4 X 3 = 12 different switching states, ie to register up to twelve pulses. For practical reasons, taking into account the limited number of contacts determined by the relay construction, the relay chain described according to FIGS. 1 and 2 is set up for the usual registration of the first ten pulses.

For the purpose of pulse registration, a not shown must be used in the relay chain according to the invention Pulse relays have a normally open contact ti, a normally closed contact 12 and a changeover contact £ 3. In the following, the operation of the relay chain according to the invention is described by the Switching processes during and after the individual successive impulses explained.

The relay chain receives and evaluates the individual impulses in the following way:

First impulse

After the pulse relay, not shown, has responded, the circuit for the relay W closes via its contact ix , namely

1. negative pole, resistance i? I, ti, 3/2, Wx, xx, resistance R 2, contact p, earth.

After the end of the pulse, the pulse relay drops out and relay X responds in the circuit

2. negative pole, xx, wx, yx, wx, xx, resistor R2, p, earth.

The relay fF remains in the same circuit as long as its winding W 1 is not short-circuited by the 'working side of the changeover contact χ χ. However, the relay W does not drop out afterwards either, since it is in the following circuits

3rd negative pole, W2 ,, wz, 13, p, earth,

4. negative pole, Wz, ze / 2, χ 2 »p, earth continues.

After responding, relay X remains in the circuit in the interval between the pulses

5. negative pole, Xx, wx, yx, yz, xx, X2,12, p, earth.

The relay Y cannot respond in the meantime because it is short-circuited in the circuit by the normally closed contact 12 of the pulse relay

6. £ 2, X2, Yx, resistor R2, 12.

The first output in the circuit is marked in the contact field

7. Earth, y6, 1x15, & 5, »3, output 1.

Second impulse

The pulse relay, not shown, responds again and closes the circuit

8. negative pole, resistance Rx, ix, xx, X2, χ2, Yx, resistance R2, p, earth,

in which the relay X continues and the relay Y responds, since the short circuit 6 is released for this relay. '

After the pulse has ended and the pulse relay drops out, relay X drops out because circuit 5 at contact y χ is interrupted. Circuit 8 is disconnected for relay Y and winding 1 of this relay is short-circuited by circuit 6, but its second winding keeps it in the circuit

9. negative pole, Y2, 3/3, 0/3, p, earth.

The second output in the circuit is in the contact field

10. Earth, y6, κ / 6, a6, b6, output2 marked.

Third impulse

When the pulse arrives, the pulse relay, not shown, responds again and opens the holding circuit 3 for the relay W, in which this relay was held after the relay X dropped in the interval between the pulses. Relay Y remains in the iao circuit for the duration of the pulse

11. negative pole, Y2, 3/3, £ 3, p, earth.

After the relay W drops out , a circuit for the relay A,

12. negative pole, Ax, bx, 314, »3, p, earth is switched through.

The relay A characterizes the beginning of the second three-stroke cycle by its response and remains alternately in one of the following circuits until the arrival of the eighth pulse: S 13th negative pole, Ai, bi, x ^, ai, p, earth,

14. negative pole, A 2, χ 4, α ι, p, earth,

15. negative pole, A2, 315, ai, p, earth.

In the modification according to FIG. 2, the circuit 13 is replaced by the circuit
13a. negative pole, Ai, bi, »5, p, earth.

After the end of the pulse, the pulse relay drops out and interrupts the circuit 11, in which the relay Y drops out.

The third output in the circuit is in the contact field

16. Earth, 3/6, κ> 5, α 2, £ »4, output 3
marked.

Fourth impulse
20th

After the pulse relay has responded, circuit 1 closes to respond to relay W. After the pulse has ended and the pulse relay drops out, relay Z in circuit 2 is activated. After responding, relays W and X hold themselves in different ways in circuits 3, 4 and 5.

The fourth output in the circuit is in the contact field

17. Earth, 3/6, WS, &5> «3. Exits
marked.

Fifth impulse

The pulse relay responds and switches circuit 8 through, in which relay Y responds and relay X is held. When the pulse has ended and the pulse relay drops out, relay X drops out, for which circuits 5 and 8 are interrupted. Relay Y remains in circuit 9, relay W in circuit 3. After relay X drops out, relay B speaks in the circuit
18. negative pole, Bi, 104, 3/5, χ 4, α ι, p, earth on.

After the response, the relay B remains in the circuit via its second winding B 2 until the relay chain is returned to its rest position

19. negative pole, B 2, b2, p, earth.

The fifth output in the circuit is in the contact field

20. Earth, 3/6, w6, α6, starting
marked.

Sixth impulse

During the impulse the impulse relay responds again and it interrupts the hold circuit 3 of the relay W. During the duration of the impulse the relay Y remains in the circuit 11. After the end of the impulse this circuit is interrupted and the relay Y drops out .

The sixth output in the circuit is in the contact field

21. Earth, y6, w $, 02, & 4, output6
marked.

Seventh impulse

After the pulse relay has responded, circuit 1 of relay W switches through. After the pulse has ended and the pulse relay drops out, relay X in circuit 2 responds. After responding, the relays W and X stay in one of the circuits 3, 4 and 5.

The seventh output in the circuit is in the contact field

22. Earth, y6, w5, b * ,, αζ, output7
marked.

In the modification of FIG. 2, the seventh output in the circuit

23. Earth, yd, ze; 5, & 5, »4, exit 7
marked.

Eighth impulse

When the pulse is received, the pulse relay responds and circuit 8 is switched through. In this circuit, relay Y responds and relay X continues. The circuits 14 and 15 are interrupted by the go contacts of these two relays. When relay B responds, circuit 13 or 13 a is interrupted, and relay A therefore drops out, since none of its hold circuits 13 or 13 a, 14 or 15 is switched through at this moment. After the end of the pulse and the pulse relay drops out, circuits 5 and 8 are interrupted, so that relay X drops out. The relay Y remains in circuit 9, the relay W in circuit 3.

The eighth output in the circuit is in the contact field

24. Earth, 3/6, w6, α 6, & 6, exit 8
marked.

Ninth impulse

During the duration of the pulse, the pulse relay responds, which interrupts the hold circuit 3 of the relay W , and this relay drops out. no During the duration of the pulse, relay Y remains in circuit 11; after the pulse has ended, this circuit is interrupted and relay Y drops out.

The ninth output in the circuit is in the contact field

25. Earth, 316, «/ 5, a, 2, i> 3, output9
marked.

Tenth impulse

After the pulse relay has responded, circuit 1 is switched through, in which the relay W responds. After the pulse has ended and the pulse relay drops out, relay X in circuit 2 responds. After responding, relays W and X remain in circuit 3, 4 or 5.

The tenth output in the circuit is in the contact field

26. Earth, y6, w ^, & 5, 04, output ο
marked.

In the modification of Fig. 2 , the tenth output is in the circuit

27. "Earth, y6, ze; 5, & 5, 04, exit ο
marked.

As can be seen from the above description, the combination of the working or rest position of the individual relays always clearly defines a single state in the determination field. The state after the last received pulse is maintained until a relay (not shown) responds, the contact p of which switches off the earth for all relays in the chain, which is practically instantly returned to the rest position.

Claims (1)

PATENT CLAIM; Two relay groups composite "° relay chain for counting and evaluation of electrical pulses in telecommunications, in particular telephone systems, characterized in that the first group of three relays (W, Y, X) in three clock circuit, evaluated by their interaction three different switching states of this group while the second relay group contains two relays (A, B) which are switched in such a way that, through their interaction, the three switching states of the first relay group are counted and evaluated in up to four different ways. Considered publications:
German Patent Nos. 831 561-838910; Dutch patent application No. 126 695. 1 sheet of drawings © 609 528/216 5.56 (709-9B4 / J4.58)