DE2158780C2 - Circuit arrangement for measuring the wet time of a number switch for Fernmel de, in particular telephone systems - Google Patents

Description

tes (nsa) started and can take place at the end of the dial pulse test items.

This is stopped and the counting result with a Γι is sufficient according to the invention.

Minus sign is displayed («) and or that the tear-off counter, which measures the break-off time,

is canceled (v). "30 the linden tree with impulse contact generated with dom

2. Circuit arrangement according to claim 1. da- dialing pulse is started that the demolition counter is characterized in that to display (a) the at the beginning of the next dialing pulse in the absence of a counter result one or more number tubes of the demolition conditions is stopped and put back into the serving position, that if present

3. Shutter arrangement according to claim I. da- 35 of positive demolition conditions, the currently counting characterized in that the counting result demolition counter by opening the during the elevator a comparison * (V) is supplied to this and de. Ablauts of the number switch closed result examines whether it is stopped in the permissible tone of the overriding contact and its tolerance range. · The counting result is displayed and / or evaluated

4. Circuit arrangement according to claim 3, da- 40 and that in the presence of negative Abrißbedindurch connected that the comparator (! ') Controls the device (v) during the selection pulse in the off, the demolition counter standing according to the initial position by opening dos Gut - or bad statement started the tested number bridging contact and classified and / or stamped at the end of the meter switch (NS). Dialing pulse and the counting result with

45 is displayed and / or evaluated with a minus sign.

The fact that the demolition counter at each end of the

Dialing pulse and at the beginning of the next

Dialing pulse stopped again and switched to off

50 gear position is reset, unless that

The invention relates to a circuit arrangement for the bridging contact in the intermediate second Measuring the demolition time of a number switch has opened. every single election impulse is thereupon for telecommunications, in particular telephone systems. examines whether it is the last of the series of pulses. on with the help of an oscillator frequency, the number of which this way the examiner is not bound by it, Vibrations during the demolition time with a 55 always only have one and the same number of dialing pulses electronic counter counted and then sent out, but he can use the is shown. Open the number switch. Even if the finger

Such a measurement of the tear-off time has not even reached the finger stop when the person pulling it up for example from US Pat. No. 2,935,679 or if known when the Num is opened quickly. In this reference it is described that 60 mern switch with the help of a narrow, hard gear Check the demolition time of two objects connected in parallel or a changeover contact that is changed so that the first pulse does not work properly the number switch impulse is available, it does not lead to an incorrect measurement just not needed components of the telephone of the demolition time.

short-circuit, an oscillator has a measuring frequency above 65. Should the bridging contact open, both of them which sends contacts to one meter each. The one that closed before the impulse contact becomes the down counter but are only advanced when the crack counter has also started, this time by the Number switch was pulled up and a pre-bridging contact, but the counting result with

provided with a minus sign. This brings the entire resistances, damping elements, etc.

part of the fact that even negative break times measured within the telephone during the dialing briefly

and are displayed. close. This causes pulse distortion

An example of the invention is largely avoided on the basis of. It also becomes a bigger one

Drawing explained in more detail. F i g. 1 reaches the 5 effective range. The contact nsa should

Interconnection of the disconnection measurement also open after dtr contact nsi after termination

reversible devices. With reference to Fig. 2, the supply of the last pulse to be transmitted is closed.

Measurement of the demolition time has explained in more detail sen. The time between the closing of the

The number switch to be checked NS is in a clocked nsi and opening of the contact nsa is interrupted

suitably called to a measuring device for Prüfnummem- io time. The ma contact opens later than the

switch connected, iru whose components also have /! «contact closed. so it is

the device for measuring the demolition time belongs. a positive break time, in the opposite case by one

The number switch contacts to be measured are negative. The negative break-off time is undesirable. she

NS are thus connected to an input circuit £ is usually achieved by adjusting the contacts

connected, which eliminates a known pulse shaper 15 for unlocking nsa,

contains zeroing of the number dialing pulses. To adjust the demolition according to the invention

This input switch is followed by a gate switch, it is not necessary to full the number switch

device 7 ", which pull up to zero during the opening or closing time. The demolition time can also

th of the number switch contacts the oscillator frequency can be measured with a smaller number,

sequence of a generator »G to the demolition counterZ- 20 The condition for the positive demolition (/i.n-Kon-

lets through. bar closed. / ivfl contact closed) is

At the counter Z is a memory Sp for receiving the closing of the contact nsi during the

the number result of the AbrißzählcrsZ and given sequence of the number switch available. From the-

possibly connected with a minus sign. This crack counter starts every time there is a conflict

Memory has two outputs, one of which leads to an »5 at the end of each dialing pulse and so long until

show α of the counter reading, for example, one of the contacts opens from Zif-, the / !. i-contact opens, see above

fer display tubes may exist. On the second it wasn't the last closure. The counterZ becomes

Output is a comparator V for limit values stopped and in its initial position, to zero,

closed, with the help of which it is checked whether the is reset via the reset line r, but opens

measured value still within the tolerance range 30 of the ma contact. so that was the last election impulse

located. If this is the case, it gives a signal to a white and the measurement result of the counterZ the positive

teres device not shown here. for example at crack time.

a stamp trigger see If besides the measuring device After the end of the pulse series the value of the break-off time is also stored in the memory Sp and displayed, like the entire measuring device for the number switch Gut-Aus 35 already described. The memory will deliver during the say, if a stamp of the first opener ^ des /! «- contact of the next I pressed on the tested number switch is pressed in a known manner, a series of pulses is deleted via line 1,
or in some other way the usability of the opens but the nsa contact before the / »« - con test object signals that the clock closes. So if the demolition counter Z is in

In Fig. 2 the phases of a number switch 40 are in its starting position, then the Abter sequence is shown. In phase I the number counterZ is also started. It then runs up to the dial switch. In phase II the next closing of the mi-contact takes place. Simultaneously mernschaltcr turns off and ends impulses / to reduce the minus sign memory in memory Sp receives via the system. to which the subscriber station with the one line / 1 sends a signal that tells him to provide the next number switch NS normally built with a minus sign. is closed. After the end of the series of pulses, phase III is also saved and displayed by the pulse contact nsigati \ c numerical value,
two more impulses are generated, but they do not continue. The minus sign memory will be given together with. the demolition counter cleared.

Each number switch generally contains 50. As already described, the three types of contact displayed, their opening and closing positive or negative break times, are compared to the comparison curves in FIG. 2 are shown. The first one is more likely to transmit V and there it is examined whether the values named contact is the number switch pulse - are still within the tolerance range. With the evaluation contact nsi. It is usually from a normally closed contact - this result is the end of the measurement,
55 At number switches where the /! «'contact loop to the office in rhythmic order. This is not an idle, but a working contact, worried pulse contact still generates, as previously described, an inverter reversing the polarity of the output, two further pulses that are suppressed.

have to. This task is carried out by the number In the same way as the breakdown based on the switch return contact nsr. It closes for the at- 60 / ua-contact is measured, can also the work-

the excess impulses briefly the / w-contact. way of mr contact to be observed. In the-

In addition, the number switch also contains a case, however, in the case of this contact

Bridging contact / 15a. This contact has to insert an inverter into the incoming line.

1 sheet of drawings

Claims (1)

has given the given number of pulses. Then patent claims · a counting device actuates a relay, the contact of which allows the measuring frequency to access the counters 1. Circuit arrangement for measuring the Ab- enabled. By opening or closing the excess time of a number switch for telecommunication. 5 monitored contacts, the payer is disconnected again, in particular telephone systems, with the help of a disconnects, and the counting result can be read off who-oscillator frequency. whose number of vibrations den. This circuit arrangement has the disadvantage that during the demolition time with an electronic counter, the same number of pulses must always be counted and then displayed. The measurement of a diminishing time is characterized in that if the numder tear-off counter (Z) is increased to a greater or lesser extent at each end of a meter switch, it is not possible, even if there are suspected ruptures of choice pulses generated from the impulse concoction (nsi) that started outside of the tine it becomes that the demolition counter (Z) are at the boundary. Another disadvantage is then to catch the next dialing pulse in the absence of the see that with negative break times, ie in cases, break conditions are stopped and in which the monitored contacts open or the initial position (zero) is reset that were closed Before the last pulse has ended, positive demolition conditions of the dike display are present, as if these contacts opened the demolition counters (Z) that were exactly counting at the same time as the last dialing during the elevator and the expiration of the pulse ended is. Such measurement error is self-Nummcrnschalter (NS) closed Überbrük- ao clearly undesirable. kungskontaktes (nsa) stopped and its counter object of the invention is. a circuit result displayed (a) and or evaluated (λ) to indicate the order with which a break time and is measured and that when there is a negative breakdown depending on the number of dialing pulses conditions that become in during the election pulse and with which also negative break-off times quantita- the initial position (zero) are given a tear-off »5 tively, so that on the basis of this Mcs- ler (Z) by opening the bridging contact an automatic sorting or stamping of the