NO138909B - PROCEDURE FOR DEMETALLIZATION OF A HYDROCARBON OIL IN THE PRESENCE OF HYDROGEN AND A CATALYST OF VANADIUM AND NICKEL ON SILICONE OXYDE CARRIERS - Google Patents

Description

Device for automatic debiting of telephone calls.

The invention relates to automatic

telephone system and in particular a switching device for automatic registration and debiting of telephone calls. It is assumed that each subscriber is assigned a call counter and that this is moved forward step by step with pulses, which come in, one at a time during an ongoing call. The reading of the call counter takes place in a manner known per se automatically each time the totaled registration is made

the call calculator achieves a certain amount, which corresponds to a certain number of pulses taken into account. The conversation calculator is therefore made up of a step magnet, a step wheel and a contact device controlled by the step wheel, which is affected every time the mentioned number of pulses has been registered, e.g. once or twice while turning the step wheel one revolution. The contact device connects

into an identification device, which identifies the subscriber's number and forwards this to a debiting device for debiting the said amount.

The debiting device brings in printed cards, which requires a certain amount of time. For economic reasons, each identification device is common to a large number of subscribers, and furthermore the debiting device is common to several identification devices, which is why waiting times occur. A combined registration must therefore remain until the debiting process has been completed. Each call counter is therefore combined with a special memory, e.g. a mica tube, which stores the registration during the debiting process.

The invention aims to save the above-mentioned, individual memory for each call counter, and this is achieved by means of a switching device for automatic recording of calls in telephone systems, where each line is assigned one with pulses, which arrive one at a time during the call connections, step by step forward-moving calculating device made up of a step magnet, a step wheel and a contact device controlled by the step wheel, which is affected every time the totaled registration in the calculating device reaches a certain amount, the contact device influencing an identification device, which identifies the wire and forwards the identification to a device for recording said amount , this coupling device being characterized by an individual current circuit for each calculating device, which is terminated by said contact device and which connects a winding on the calculating device's step magnet to said identification device and maintains the calculating device in an affected position, both when the identification device is free as when it is occupied, and by which current circuit the identification device is affected when it is free, and in that after the identification has been finished, the calculating device is affected by connecting an auxiliary battery to said individual current circuit, so that a current reduction occurs in the step magnet's winding and the counting device releases its anchor, the contact device is reset, the identification device and the recording device are released, and a new calculation of pulses can begin.

The invention will be described in more detail below with reference to the drawing.

Fig. 1 shows an overview diagram.

Fig. 2 shows an identification device and the power circuits that connect conversation computers to it.

In fig. 1, A is a subscriber device, which by means of a line L is connected to a telephone station containing the first and second caller SLA resp. SLB and cord lines SR. For each subscriber device there is a call counter SM (which is influenced via a signal wire c.

The conversational calculator SM is provided with a contact device k, which is affected every time the calculator's step wheel reaches a certain position. An identification device SMD is arranged in common for a group of wires. Common to several groups of wires is a debiting device, which comprises partly a reading device NS and partly a card printing machine NM.

In the case of a call from the subscriber device A, the voice wires a and b of the line L and the signal wire c are connected by means of the detectors SLA-SLB to a cord line SR. After a call connection has been established, billing pulses are sent over the wire c from the cord line SR to the call counter SM, which registers the pulses. When the contact device k is affected, a current circuit for the identification device SMD is closed. After the identification has been implemented, the device SMD is read in a known manner by a device NS, which transfers the reading to the card printing machine NM. The machine NM can be located on a superior telephone station and be common to an entire telephone network with a majority of stations.

In fig. 2 shows two call counters SMI and SM2. The conversation calculator SMI is designed so that the calculator's step wheel is moved forward one step every time the step magnet attracts its armature. When the contact at is closed, the step magnet is therefore magnetised. The contact kl can be affected directly by the armature of the step magnet depending on the position of the step wheel, which is well known from selector telephone systems, whereby it is achieved that the contact kl breaks, when the step magnet releases its armature.

If it is assumed that the conversation calculator SMI is moved step by step with pulses until the contact device kl is affected, the conversation calculator will retain its anchor in one of the following circuits;

a) If the indicator is free: earth, the winding on SMI, kl, the resistor ri, upper

winding on the relay Sl, contact 62, to V+. The relay Sl attracts. Contacts 71—75 are affected. The relay R6 attracts, when the contact 72 closes. Contact 60—65 is affected. The winding on Sl is exchanged with the resistor r3, when the changeover contact 61-62 is actuated.

b) If the identifier is busy: earth, the winding on SMI, kl, ri, r3, the contact

61, to V+.

It is assumed here that the identifier is free. The relay Tl attracts when contacts 71 and 60 are closed. The relay Sl is kept with current through its bottom winding and the contacts 73, 32 and 12. The relays Sl-n form a relay chain, in which only one relay at a time can remain switched on, after the relay R6 has attracted. Should the relay Sn have attracted at the same time as Sl, only Sl is held, while Sn is disconnected by the contact 74. The relay Tl closes the contacts 101—102. The relay Ul attracts in the following circuit: earth, the winding of the call calculator SMI, kl, contact 101, the winding of the relay Ul, contacts 21 and 31 to V+. Contacts 81—87 are affected. Relay R2 is energized via contact 84 and attracts. Contacts 21— 24 are affected. The relay Ul is held in a current circuit across the contacts 11 and 82. The relays Ul-Um form a relay chain, in which only one relay at a time can remain switched on, after the relay R2 has attracted. If e.g. the relays Ul and Um attract simultaneously, the relay Um will immediately release, because its holding current circuit is broken by contact 83. The alarm relay RI receives current via contacts 54 and 23, but is slow to engage due to a series mote tooth and a capacitor connected in parallel with the relay winding and therefore does not attract in a normal connection process.

The contact 24 completes a current circuit across the contact 35, through the winding of the switch-on relay R5, • which attracts if the reading device NS is free. Wire ten leads to a relay in a relay chain in NS, which in a known manner connects only one identifier SMD at a time to the reading device. It is assumed here that NS is free and that RS attracts. Contacts 51—54 are affected. The current through the alarm relay RI is broken by contact 54. The relay combination Sl + Ul, which indicates the call counter SMI within a group of n.m counters, is signaled by means of current circuits across contacts 53 and 75, resp. 52 and 86, and the thread in the thread bundles Kl resp. K2.

The reading device NS transfers the read number to the card-printing machine NM, where the debit is carried out. Then NM and MS are released by closing a current circuit across wire t2 and contact 51 through the winding on relay R4. Contacts 41 and 42 terminate. The relay R3 attracts and contacts 31-35 are affected. The current circuit above wire ten is broken and the relay R5 releases its armature.

During the switch-on time of relay R3, which is slow-acting, the following current circuit is kept closed: earth, the winding of the call counter SMI, contacts kl, 101, 81 and 41, resistor r4, to minus. The current direction through the relay's Ul winding remains unchanged, which is why Ul is maintained, while the current through the call calculator SMI changes direction, so that SMI releases its anchor. If the contact at thereby breaks, is released

SMI.

If the SMI is performed so that kl does not break, when the SMI releases, the SMI will attract with the opposite direction of current, whereby the calculator's step wheel is advanced and the contact kl breaks. The SMI can then be moved forward step by step using pulses from the string line SR.

When R5 releases its anchor, R4 and Ul also release. The current through Ul is also broken by contact 31, so that Ul cannot be held by any waiting call counters, e.g. over contact 103. Contact 32 breaks the current for the relay Sl, which is why Sl and thus R6 release. Thereby it is checked with the help of contact 85 that Ul has also released. Relays R2 and R3 release, after which a new identification can begin.

As soon as any of the contacts 65 or 23 closes, the magnetization of the alarm relay RI begins, but is interrupted when the relay R5 connects the identification device SMD to the reading device NS.. If the waiting time is too long, RI is attracted and contacts 11-13 are affected. An alarm signal is sent out over wire AL, the identification relays Sl—Sn and Ul—Um are released, but are switched on as soon as RI releases its armature again. The identification device makes repeated attempts to carry out the above-mentioned connection sequence.

Claims (1)

Switching device for automatic debiting of calls in telephone systems, where each wire is assigned one with pulses, which arrive one at a time during the call connections, step-by-step forward moving calculating device made up of a step magnet, a step wheel and a contact device controlled by the step wheel, which is affected each time the totaled registration in the calculating device achieves a specific amount, as the contact device affects an identification device, which identifies the wire and forwards the identification to a device for recording said amount, characterized by an individual circuit for each calculating device (kl, ri, Sl alt. r3), which terminated by said contact device and which connects a winding on the step magnet of the calculating device to said identification device (SMD) and maintains the calculating device in an affected position both when the identification device is free and when it is occupied and by which circuit the identification device is affected when it is free , and in that after the identification has been completed, the calculating device is affected by connecting an auxiliary battery to said individual circuit, so that a current reduction occurs in the winding of the step magnet and the calculating device releases its anchor, the contact device is reset, the identification device and the recording device are released, and a new calculation of pulses can be started.