DE276073C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

M 276073 CLASS 21 a. GROUP

ARTURO PEREGO and CARLO MORESSI in MILAN.

Patented in the German Empire on October 16, 1913.

The invention relates to an arrangement for the transmission of electrical signals with optional Call between a number of stations connected to each other by a common line are related, and relates in particular to those systems in which automatic switching devices in each subscriber station by an electrical one Impulse triggered and by the impact be set in motion by weight pendulums or other oscillating masses at the same time.

With systems of this type, it depends on the calling station at will to exert a certain influence on one of the pendulums. Various means have already been proposed for this purpose.

For example, by means of projections seated on the flywheel masses, various Width and, using electrically moved inhibiting fingers, the swinging down of the masses is carried out in stages, so to speak and by different grouping of the projections in the individual pendulums, that only one of them responds to a certain current impulse sequence and comes to full decay, whereby a local circuit is switched on. Another suggestion is the oscillation times the pendulum on the individual subscriber stations to be measured differently and the pendulum of the calling station in each case To coordinate the call in such a way that only the pendulum of the desired station is repeated in such a series of power surges Wise is triggered that the vibration is amplified and finally the local Circuit trips.

Apparently, the facilities designed according to this principle always work first after a certain time, are also relatively complicated and conditional a cumbersome operation, since either a number of power surges must be given according to a specific system, or one each time careful tuning of the pendulum of the calling station must be carried out.

In the arrangement according to the present invention, on the other hand, it is necessary for the purpose of selection the station to be called only to switch one of several switches otherwise relatively simply set up facility. The call will then be made immediately during the time during which the triggered pendulums perform the first oscillation. This is achieved in that the pendulum or other oscillating masses, which in contrast to the known devices all carry out a constant and consistent movement when they are triggered, wear sliding contacts, in whose grinding path is a series of contact pieces, each of which is arranged Station one of the latter assigned to the common return line via a bell is continuously connected while the

the rest can be switched to the power source, so that the pendulum in the desired Momentarily closes the circuit via the instruction.

The arrangement according to the invention is in particular for the wake-up operation of telephone systems determines in which the same line is used by several stations connected in series or connected to them

ίο line are connected.

On the drawings is an embodiment of the arrangement for a system with ten interconnected telephone stations that can be mutually optional can call, demonstrates.

Fig. Ι shows the arrangement for two of these ten stations, namely the upper one with IV marked the fourth station and the lower part marked VIII the eighth station represent.

2 to 5 show a detail of the system in four different operating positions.

As mentioned, the switching device gene are under the influence of a vibrating mass; In the drawing example, these masses are formed by simple weight pendulums. These pendulums O are of the same length at all stations; they swing around a point F and are provided with a sliding contact c _m .

In its rest position, each pendulum is held at the lower end by a hook that sits on the armature of an electromagnet E _s; it is then in the initial position of its deflection movement and the sliding contact is then in contact with the normally closed contact c _s .

If the speech wave IV wants to call the speech station VIII, a double switch P _{8 is closed} at two contact points α and b in the switching device of the former (upper circuit diagram); A current then flows from a current source C via b into the line V common to all switches, from here into the electromagnet E _s and then back to the generator C. The electromagnet E _s exerts its effect on the armature and thereby latches the pendulum 0 from, which is now set in motion, which leads its sliding contact in sequence over the contact pieces C ₁ , C ₂ , C ₃ .... C ₁₀ . When the switch P _{8 is closed} , however, at the same time and for an instant, part of the current has made its way via the contacts c _s and C _n through the pendulum shaft and the pivot F to the line L ₁ ; As it passes through this line, it then flows via the electromagnets E "of all the stations I-X connected in parallel, which it excites all at the same time, and returns to the current source C via the

Line L ₂ back. As a result, the pendulums 0 start moving on all stations at the same time.

Now all sliding contacts slide over the contact pieces C ₁ , C ₂ , C ₃ ... of all stations at exactly the same, successive times. At first nothing special occurs until the point in time at which the pendulums reach the contacts c ₈ . In this position, the light emitted from the current source C station IV current that can reach during closing of the dual switch P ₈ via α to the contact C _8, through the shuttle shank in the line L ₁ flows further via the shuttle station VIII and their contact c ₈ to an electromagnet E _{1 of} this subscriber station and finally back on the line L ₂ to the power source C of the calling station IV. The electromagnet E ₁ drops its contact flap, causing the bell S, which is switched on in a local circuit, to sound. In the meantime, the pendulums of all stations complete their swing up to the last contact piece and then return to the rest position. So only station VIII has been called and the double switch a, b can be opened again on station IV. The speech streams between stations IV and VIII run via lines L ₁ , L ₂ .

But there is still the obstacle that the pendulums cannot swing back completely to the starting position because of the frictional resistance to be overcome. To remove this obstacle, an extension of the pendulum shaft is provided with a contact f and this closes a local circuit when the pendulum 0 is released , in which an electromagnet E _{m is} switched on, which acts accordingly on the armature ζ sitting on the pendulum shaft. In this way the pendulums receive an electrical impulse and their movement takes place as if they had been set in motion from a great height; consequently the pendulums can swing up so far that they hook themselves again in the rest position.

The device for compensating for the frictional losses, which could be used in all similar pendulum devices, is illustrated more clearly in its details in FIGS. Fig. 5 corresponds to the rest position in which the pendulum 0 is hooked, Fig. 2 shows it during the downward gear, Fig. 3 in the most distant swing-out position and Fig. 4 in the return position.

The current of the local circuit containing the electromagnet E _m becomes a sliding contact a! and

further passed to a bell V , which is provided with a contact-forming projection d . The pendulum O carries a swingably arranged contact piece f on the upper part of the shaft, the free end g of which is provided with an insulating coating h at one corner. The contact "", the pendularly suspended contact piece f and the pendulum shaft j> are in electrical connection with one another.

When the pendulum starts moving, the pendulum-like contact piece f comes into contact with the projection d at the metallic point of its free end; the current (battery, E _m , b ', d, g, f, ■ p, a', battery) is then closed for a short time, and the pendulum 0 receives an impulse. The current is interrupted before the pendulum O reaches the lowest point of its orbit

ao achieved. During the now following backward oscillation, the circuit cannot close because the contact piece f now grinds with the isolated point h over the projection d.

Claims (4)

Patent Claims: i. Switching device for the transmission of electrical signals with optional call between a number of stations lying on a common line, in which at all stations (IV, VIII) automatic switching devices are triggered by means of an electrical pulse at the same time, which all move under the influence of oscillating masses execute and establish the selected connection in a predetermined position, characterized in that all of the oscillating masses (O) carrying out a constant movement when they are switched on carry sliding contacts (c _m ) , each with a row of contact pieces (C ₁ .. .. C ₁₀ ) is arranged, of which one of the latter assigned to the common return line (L ₂ ) via a bell (.Ej) is permanently connected to each station, while the rest can optionally be switched to the power source (C) , so that the pendulum (O) at the desired moment the circuit over he closes the outgoing line (L ₁ ). 2. Switching device for the transmission of electrical signals according to claim i, characterized in that the power source (C) of the station when switching on a contact _{piece (z. B. P 8} ) is placed both on this and on a break contact (c _s ) of which the current on the one hand via the tripping device (E _s ) of the station, on the other hand by means of the sliding contact (c _m ) of the oscillating mass (O) via this and the common line (Lj) as well as the break contacts (c ,,) of the other stations (VIII ) into the excitation circuits (C, b, P ₈ , c _8> c _m , O, L ₁ , L ₁ at VIII, O, c _s , E _s , L ₂ , C) of the tripping devices of the same, which thus all flow simultaneously be put into action. 3. Switching device for the transmission of electrical signals according to claim i, characterized in that to compensate for the friction losses of the vibrating masses (O) for each of them an electromagnet (E ', ") is provided, the excitation circuit during part of the oscillation, for. B. at the moment of triggering, is closed and then exerts an impact on the vibrating mass, which increases its kinetic energy. 4. Switching device for the transmission of electrical signals according to claim 1 and 3, characterized in that the excitation circuit (E _m , battery, a ', j>, f, g, d, b', E _1n ) of each compensation device by means of an of the oscillating mass (O), the oscillating contact piece (f) is closed, which during the pulse generation slides with its metallic side (g) over a fixed contact (d) , during the back oscillation, on the other hand, slides over this with a non-conductive surface (h). 1 sheet of drawings.