DE22633C - System for telegraphing and telephoning on the same wire - Google Patents

Description

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IMPERIAL

PATENT OFFICE

to be able to speak telephonically.

The present invention consists in one peculiar arrangement and arrangement of the apparatus for telegraphing and telephoning whereby telegraphic signals of various kinds on the same wire can be exchanged at the same time and with the ordinary telegraph office completely remains independent of the one in which the apparatus for telephoning or Telephones are set up.

One can, for example, telegraph on the same wire. by means of a Morse, Hugh es- or Wheatstone etc. apparatus and telephoning at the same time, d. H. transmit any tones, or telegraphing and telephoning at the same time, d. H. transmit articulated words, or telegraphing, telephoning and telephoning at the same time.

This system is based on two from the inventor discovered principles. : ;;

First principle

One sends through a telegraph wire sudden currents, e.g. B. those that are obtained when this wire is used by means of a Morse The manipulator is placed in direct connection with a battery, a telephone which directly or indirectly into the conduction of this wire or of a parallel, neighboring one Wire is switched on, every time it is closed and every time the Stromes an intense tone. This proves that at the beginning and at the end one Every time the electricity is closed, the electricity flows intermittently through the wire; because would be this flow of electricity, uninterrupted and regular, would become the membrane of the telephone just bend in, but don't vibrate.

If one sends only gradual currents instead of sudden currents through this wire, i. H. such Currents, which when the circuit is closed gradually up to a constant maximum increase, and then gradually decrease again, until their current is wholly or partly stops, the membrane of the telephone only bends in, but it does not vibrate. At the The membrane therefore no longer produces a sound or only a very weak sound when the current passes through it Sound out what is the proof that in this case the current of electricity no longer interferes, but is noticeably continuous.

So if one considers the sudden currents that are now being used in telegraphy, replaced by gradual currents, the inconveniences caused by it disappear the induction of the telegraph wires upon the telephone wires arise. Can also one and the same wire telephones and telegraphs, because on the one hand the for the Telephoning in certain currents has no influence on the receiving apparatus in the telegraph office and changes partly gradual, Currents used for telegraphing, even if they are direct (primary), not disturbing Be able to produce more effect in the telephone.

The invention described above, that by using the gradual currents, '

which for telegraphing and telephoning at the same time on one and the same wire very much useful, the induction of the telegraph wires upon the telephone wires is eliminated, forms the subject of an earlier patent.

The present patent relates to a system for simultaneous telegraphing and telephoning, the telegraph office and the telephone office being completely independent of each other stay.

The characteristic of this system consists in the separation of the common telepraphy used currents of the undulating currents, which in the apparatus for telephoning and telephoning, or which are harmonic Telegraphir come into use. This separation is brought about by the action of induction or condensation, without the line used for telephoning or telephoning in metallic contact with to bring the line required for ordinary telegraphy. The two lines therefore remain independent of each other.

Second principle

In Fig. 6 of the accompanying drawings, A and A 'represent two capacitors of low capacitance ( ¹ f _i microfarad is sufficient), which are switched into the wires CS and CS' branching off at S and S ' from a telegraph line LR and respectively. with the apparatus of the telephone stations, of which y should be the receiver and y ^l the transmitter. Z and Z ¹ are two other branches in the telegraph line LR direct, which have no condenser switched on, but offer a resistance of not less than 500 ohms.

In this way the branches Z and Z 'can be switched off or on during a telephone conversation without any reduction in the intensity of the tones perceived by the telephone being noticeable. This is still the case if the telephone receiver presented a resistance of more than 2,000 ohms.

Accordingly, Z and Z ', Fig. 6, represent the installations any two telegraph stations, where work is carried out with gradual currents, so their work can in no way be detrimental to the functioning of the telephone. Vice versa the installation of the telephone station cannot have the slightest harmful influence to exercise on the telegraph apparatus, because the currents intended for the latter do not differ can branch off through the capacitors. This way you get two special ones Services that are separate and completely independent of each other, but on one and the same Wire can be run.

Provided that the two are mutually independent on the same line is available, the same purpose can also be achieved on the way of the Achieve induction by connecting the junction intended for telephoning with the secondary Wire of an induction coil provided with a soft iron core connects the primary Wire communicates partly with the line and partly with the telegraph station, on which, by the way, only with gradual flows are worked. It should be noted here, however, that the first mediates Condensation performed device delivers better results than the last described.

Fig. 1 of the accompanying drawings illustrates the device in which the separation of currents of various nature by induction and Fig. 2 that in which the separation caused by condensation.

In Fig. Ι A is provided with an iron core induction coil, the primary wire of which is the connection between the line LR and the branch TB, which leads to the telegraph office Z and whose secondary wire establishes the connection between the earth T ' and the branch CS , the latter leads to Bureau Y , in which the apparatus for telephoning or telephoning are set up. In the two stations, the apparatus can be arranged in the usual way. The only condition to be fulfilled here is that the branch TB from the telegraph office Z must never be isolated or switched off, and that the latter may only be operated with gradual currents.

In Fig. 2, A is the condenser, one side of which is connected to the line LR and the other side of which is connected to the branch S-C , the latter leading to the telephone office Y , in which the apparatus for telephoning and telephoning can be set up as usual . The telegraph office Z is in direct connection with the main line LR through the branch TB. In this case the only condition to be fulfilled is that the branch TB in the telegraph office is never in direct contact with earth, that it always offers a resistance of at least 500 ohms, and that the office work with gradual currents. To achieve this purpose, the device of the telegraph station Z shown in FIG. 2 is the best because the resistance of the wire coil of the receiving apparatus R ' always remains connected between the line and the earth.

In the event that the usual arrangements or arrangements of the telegraph

Apparatus are to be maintained, an electromagnet K would have to be switched on between the battery P and the manipulator M or between the former and the earth T ' .

In Fig. 3, the electromagnet K is connected between the battery and the manipulator and in Fig. 4 between the battery and earth.

It should be noted that the resistance of this electromagnet is not less than 500 ohms may be.

Although it was mentioned in the foregoing that the apparatus on the telephone station Y can be arranged in the usual way, the arrangement thereof should be changed in order to work with greater success over long distances.

In this case it is advisable to choose the device represented by FIG. 5, which is characterized by the use of a commutator JP ' which is of the same construction as the manipulator of a Morse apparatus and has the purpose for which Receive the resistance of the transmitter U and switch off the resistance of the receiver E from the circuit during the transmission.

Claims (1)

Patent claim: The devices shown in FIGS. 1 to 6 of the apparatus commonly used for telegraphing, telephoning or telephoning, which devices essentially consist in the fact that a condenser A in the branches CS of a telegraph wire LR starting from two points, on the one with gradual currents when telegraphing is being worked, switched on and the devices commonly used for telephoning or telephoning are inserted behind the condenser in these branches, with the aim of: a) the undulatory currents required for telephoning or telephoning from the to separate continuous currents used in telegraphing; b) exchange electrical signals of different nature on the same wire at the same time, in particular to be able to transmit ordinary telegrams and articulated words or any tones at the same time and c) to be able to carry out this double service without the need for telephoning or telephoning to bring the used line into metallic or conductive contact with the ordinary telegraph line, the latter in this way remains completely independent. 1 sheet of drawings.