DE1162881B - Dial number memory for telecommunications self-connection, in particular telephone dialing systems - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school Class: H 04 w

German class: 21 a3 - 16/10

Number:
File number:
Registration date:
Display day:

S 72432 VIII a / 21 a3
February 8, 1961
February 13, 1964

Dialing number memories are known, which are used as memory elements, punch cards, magnetic tapes or Have cam disks. The dial number memory with punch cards have the disadvantage that the Insertion into the scanning device and the subsequent placing back causes considerable effort. The ones with magnetic tapes equipped dial number memory are uneconomical because of the necessary amplifiers. On the other hand, dial number memories provided with cam disks can be saved with little effort ίο Establish, however, is a fast rewind and thus the possibility when the busy signal is heard the choice to start over immediately was not given. This creates unpleasant delays, and it an avoidable overload of the telecommunications network occurs on. A high accuracy of the scanning and switching mechanism is also required, since several, In some cases differently working, dial pulse switches have to be driven. It goes without saying it is also conceivable to carry out such memory elements coated in the manner of the printed circuit. Furthermore, a dial number memory is known from the German patent specification 706 201, in which Slats arranged in the shape of a segment of a circle, but not in printed circuit form, are used will. The numbers are saved by tilting individual slats.

This method has the following disadvantages: Both the production of the memory elements and the storage itself cannot be carried out economically because it is a possibility for automation is not given.

The above-mentioned disadvantages are avoided according to the invention in that each printed Lamella a predetermined separation point in the form of a web is individually assigned to store the Call number is blown in a special device into which the memory element is inserted was, and that the control current pulses are supplied to switching means during the selection process, the two Control differently working dial pulse switches.

The invention is based on dialing number memory for telecommunications self-connection - in particular Telephone dialing systems - using a memory element provided individually for each call number to be dialed, preferably on one lamellae arranged in a circular path, when they are scanned, a control current pulse is generated for each selection pulse is triggered, and in the metallic coated as memory elements in the manner of a printed circuit Isolation plates are used.

Dial number memory for
Telecommunications self-connection, in particular
Telephone systems

Applicant:

Dr. Manfred Seiffert,

Buchholz (Kr. Harburg), Freudenthalstr. 10

Named as inventor:

Dr. Manfred Seiffert, Buchholz (district of Harburg)

The Wahmuinmernspeicher according to the invention can can thus be produced without a large outlay in terms of equipment.

The invention will now be described in more detail with reference to the embodiment shown in the drawing described.

Insulating material plates are used as storage elements, which are coated with metal in places like the printed circuit. A scanning arm b which scans on a predetermined, preferably circular scan places the metal-coated insulating material α, effected in a circuit a pulse sequence. The metallic, preferably chromium-containing coating is lamellar on the scanning path c. Each individual lamella is connected to another part e of the metallic coating via a predetermined separation point d, ie a point of reduced cross-section.

The respective dialing pulse sequence corresponding to the call number of a subscriber is stored in that certain nominal separation points d are burned through by means of an electric current. In spite of the contact being made by the scanning arm b, no more current can flow through these lamellae, which are then no longer connected. The storage is preferably carried out in the factory in a device provided with a suitable, appropriately adjustable contact arm, into which the storage elements are inserted. The contact arm is preferably set and advanced automatically as a function of switches or keys actuated in accordance with the call number to be stored; in doing so, the victories / to be burned through for each pause between the series of dialing pulses are separated. They control the contact arm, which moves continuously at a constant speed

409 508/116

Switches or buttons that trigger the activation of the burn-through current.

The clear arrangement of the switches in such a device simplifies storage. It is advisable not to burn through with one sliding the slats on the scanning path Make contact, but preferably to let it touch the webs so that the scanning path definitely remains undamaged. In addition, a lower burn-through current is required, because additional heating occurs at the point of contact of the contact arm.

During the selection process, the slats of the scanning path c of a storage element are scanned. The resulting control current pulse sequence is fed to switching means which control two selector pulse switches that operate differently. Both electromagnetic relays and electronic switches can be used as switching means.

The one dial pulse switch or normally open contact (nsa) required for the dialing process is preferably actuated by a drop-out delayed relay (NSA) which can be actuated by the control current and whose drop-out delay of at least 30 ms and a maximum of 600 ms is caused by electrical or magnetic energy storage, preferably by a capacitor C1 . Furthermore, there is of course a response delay which is increased by as small an amount as possible by an active or reactance resistance R 1, which is preferably used for decoupling.

Another relay (NSI) , which is switched on in pulses by the control current pulses, actuates the pulse contact (nsil) and is equipped with means which cause a response delay, preferably an active or reactance resistor R 2 and the capacitor C 2. Likewise, other electrical or magnetic means can cause this response delay, e.g. B. via relay windings temporarily short-circuited by relay contacts.

Claims (6)

Patent claims: 1. Dial number memory for telecommunications self-connection, in particular telephone dialing systems, using a memory element provided individually for each dial number to be dialed with lamellae arranged on a preferably circular path, with the scanning of which a control current pulse is triggered for each dial pulse, and in which as memory elements in the manner of a Metallic coated insulating material plates are used on the printed circuit, characterized in that a predetermined separation point in the form of a web (d) is individually assigned to each printed lamella, which is electrically blown to store the call number in a special device into which the memory element (a) was inserted , and that during the selection process, the control current pulses switching means (NSA, NSI) are supplied which control two differently operating selection pulse switches (nsa, nsil) . 2. Dial number memory according to claim 1, characterized in that the device for storing the call numbers has a contact arm that sweeps over the webs (d) and is automatically set and advanced depending on the switches or keys actuated according to the respective call number to be stored and / or the burn-out current feeds. 3. dial number memory according to claim 1, characterized in that the metallic Parts of the storage elements contain chrome or are chrome-plated. 4. dial number memory according to claim 1, characterized in that the switching means are designed as electromagnetic relays (NSA, NSI) or as electronic switches. 5. dial number memory according to claim 4, characterized in that one dial pulse switch or normally open contact (nsa) is actuated by a drop-out delay relay (NSA) whose drop-out delay of at least 30 ms and a maximum of 600 ms is caused by electrical or magnetic energy storage. 6. dial number memory according to claim 5, characterized in that the other dial pulse switch or pulse contact (nsil) is to be actuated by a delayed-on relay (NSI). Considered publications:
German Patent No. 706201;
German interpretative document No. 1 093 419. 1 sheet of drawings 409 508/116 2.64 Bundesdruckerei Berlin