DE148750C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The present invention aims at

Telephone exchanges to relieve the telephone officers as far as possible and every control and to relieve work on the signal signs.

At the office there is (see Fig. 1 and 2) a polarized electromagnet m, the armature a of which carries a narrow leaflet b on a correspondingly long handle, which

ίο usually covers a colored stripe f that appears when you call the office and disappears again when you give the final signal. The armature is moved back and forth as a rule by switching the poles of a battery or, in the case of alternating current inductors, by rectified current surges which are sent by the electromagnet m .

The latter can e.g. B. can be achieved in a simple manner that all positive or all negative current surges as they arise in the inductor are either interrupted or, as here, are short-circuited at the point of origin so that they cannot get into the long-distance line. A sign with pointer Z (Fig. 3 and 4) indicates the signals to the participant, for example:

A (to call the office with rectified currents),

T (to call the other party with AC currents) and

S (to end the signal with currents in the same direction, but with currents opposite to those when calling the office).

The commutator K (Fig. 6) connected between the poles of the alternating current inductor consists of a metal ring g (Fig. 5) which sits on the inductor shaft and which, as can be seen from the circuit diagram (Fig. 6), on the one hand permanently with the contact spring r and on the other hand by a semi-ring-shaped approach of the ring g with the contact springs T ₁ or r., BEZW during half a revolution of the inductor shaft. is in communication during the duration of a current pulse. The contact spring r is also -an one PoL and the contact springs r _l and r. ₂ are jointly placed on the other pole of the inductor J. The pointer Z now influences the springs T ₁ and r. ₂ so that only one or the other spring or neither of the two comes into contact with the semicircular projection of the ring g. In this connection of the commutator, depending on the connection of the poles of the inductor, either all positive or all negative current impulses are short-circuited, as they arise in the inductor directly from the inductor via springs T ₁ or r ₂ , "the metal ring g, the spring r are fed back to the inductor; However, the commutator can also be switched on in such a way that these current surges are interrupted and the others directed in the opposite direction are passed through the commutator, etc.

In the circuit diagram of FIG. 6, the short circuit is one type of current surge (negative or positive) provided,

Using this diagram, the circuit is as follows.

If the participant is having a conversation with someone else, he turns the pointer Z to A and then turns the inductor crank. Here, the spring r ₂ comes into contact with the semi-annular extension of the ring g , and the positive or negative current surges are now switched directly by

ίο when they arise in the inductor, they are returned to the inductor via the spring r ₂ , the half-ring g and the spring r. The not directly switched current surges, which arise as long as r _{2 is} not connected to the ring g and this line is therefore interrupted, take the following course: earth E ₁ , bell G, changeover switch U, contact r ₃ , inductor J, commutator . K and pointer Z, line L ₁ , magnet m, earth E ₂ .

The colored area / appears because the armature α is moved towards it by the rectified currents.

The telephone is then picked up and the subscriber can speak to the office through the following closed line: Telephone H, line L ₃ , line L ₁ , magnet m, office apparatus and back through line L ₂ , contacts r ₄ and r ₅ , line L ₄ and subscriber telephone.

After the desired connection has been established, the subscriber turns the pointer Z to T, with which the commutator is switched off, and then turns the inductor crank. The alternating currents for calling the participant then take the following course: earth E ₁ , pointer Z, inductor /, line L ₂ to the participant through bell to earth. Since, the pointer Z is not associated with the line L ₁ in contact, the path via this line and magnet in interrupted and a shaking of the armature is α excluded when calling the Mitteilnehmers.

The subscriber now picks up the phone and the conversation can begin after the first subscriber has turned the pointer Z to S beforehand. The flow of calls takes the following course: Telephone H, line L ₃ , line L ₁ , magnet m, line cord to Mitteilnahmef, back through L ₂ , contacts r ₄ and r ₅ , line 50 'line L ₄ and telephone H. Is that The call is ended, the telephone is attached and the inductor crank is simply turned, whereby the current takes the same course as when calling the office, but with impulses in the opposite direction, since the impulses in the opposite direction are now short-circuited as they arise in the inductor via the Spring T _1, the ring g, the spring r and are fed back to the inductor, so that now the armature α is moved back and the area f disappears, a sign that the connection is to be broken.

In the case of multiplex switches, the control is used to test the line in the previous manner appropriate.

In the single-line system, in order to avoid shaking the armature α when calling the subscriber, provision can be made that the bell of the subscriber works with rectified currents, with the same current pulses being used as when calling in order to avoid the earlier appearance of the final signal of the office.

Claims (1)

Patent Claim: Device for telephone exchanges, in which by means of the same electromagnet the call and end signal is given, indicated by the use a polarized electromagnet connected to the line line in such a way that its armature at its by the movement caused by one direction of the current the call sign and by the opposite direction of the current caused movement brings out the final sign. 1 sheet of drawings.