DE191853C - - Google Patents

Description

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PATENT OFFICE.

PATENT LETTERING

CLASS 74 c. GROUP /.

in FRANKFURT a. M.

Signal system.

Addendum to patent 172659 of February 3, 1905. *)

Patented in the German Empire on January 11, 1907. Longest duration: February 2, 1920.

In the main patent, an electrical system is described in which for the purpose of signaling by changing a resistance in the encoder, the resistance of the entire circuit is changed and so weakly glowing lamps in the receiver are made to glow brightly.

This process, incandescent lamps in an electrical signal system during the idle state with a weak current and during operation with a stronger current load becomes a reversible one after the circuit of the present invention made. So you can not only send a weakly burning incandescent lamp from the receiver to the bright or back to the Bring dark lights, but also vice versa from the receiver an incandescent lamp or a group of light bulbs at the encoder shine brightly for a longer or shorter period of time or let it burn in the dark without increasing the number of lines. This is achieved by that both parts of the system, transmitter as well as receiver, each contain two resistors, which can be connected in series or in parallel with each other and of which at least every time one is a lightbulb resistor. By connecting the two resistors of one station in parallel, the total current increased in the system and thus brought the light bulb of the other station to shine brightly, that when connected in series of the first two resistors only glow weakly.

In the exemplary embodiment of the drawing, the subject matter of the invention is shown schematically, namely, giver and receiver are each drawn in three different positions or three transmitters and receivers in parallel on the same voltage rails in different switching positions for illustration brought.

The positive rail is connected by the line a to the transmitter b , which in turn is connected by the line c to the receiver d lying on the negative rail. The light bulbs of the transmitter and the receiver are designated with f _x and f ₂ , the other resistor group with g _x and g ₂ . The two resistors are connected in series and in parallel using a multi-pole changeover switch Zz ₁ or h ₂ .

In position I, the two resistors on each station are connected in series, so that the lamps glow only very weakly and thus the proper idle operation Show. To send a signal from the transmitter to the receiver through a

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*) Previous additional patent: 189236.

To give the lamp the correct lighting up there, the changeover switch Zz _{1 is brought} into position II, so that J _x and g _x are connected in parallel and, as a result of this reduction in the total resistance, f. ₂ shines brightly. The lamp / j, on the other hand, remains dark because the resistor g _{x is} now connected in parallel with it. A signal has therefore been communicated to the receiving station.

ίο In order to draw special attention to the signal, an acoustic signal can be added. For this purpose, for example, a connection between the negative rail and a contact of the changeover switch Zz ₁ , in which the bell k is switched on, is placed. When switching the switch Zz ₁ from position I to II, this circuit is closed for a short time and the acoustic signal is given.

To indicate that the signal has been recognized, the changeover switch of the receiver Zz _{2 is} thrown and, as a result, resistor g _{2 is} connected in parallel to lamp f ₂ (position III) so that lamp J ₁ lights up. This lighting up of the lamp at the encoder is the confirmation sign. If the resistances g _l g _{2 are} as large as the resistances of the lamps, the total resistance of the circuit is ^{in position III 1} J _{4 of} the resistance in position L. the changeover switch Zz _{1 of} the encoder switched back to the initial position, whereby the lamp f ₂ is darkened again; attention can again be drawn to this change in the signal by a signal from the alarm clock k .

To confirm the undone command or the change in the latter, switch Zz ₂ is now also brought to the position ί, so that the lamps f _Y now also burn dark and the idle mode is restored.

Claims (3)

Patent Claims: 1. Signal system according to patent 172659, characterized in that the change in the lamp current intensity by switching resistors (g _x or g ₂ ) from the series connection with the lamps If ₁ or f ₂ ) is done in parallel with the lamps and vice versa. 2. Embodiment of the signaling system according to claim 1, characterized in that that the device for switching the resistance is provided both at the transmitter station and at the receiver station is, for the purpose, a return signal from the receiver without increasing the number of lines to enable the donor. 3. Embodiment of the signal system according to claim 2, characterized in that a multi-pole changeover switch (Tz ₁ or h ₀ ) is arranged on the transmitter and receiver points, one lever of which is attached to the free end of the switching resistors (g ₁ or g ₂ ) and lamps (Z ₁ or f ₂ ) and its other lever is connected between them, in such a way that the first lever one time through the connecting line (c) with the changeover switch of the other position and the other time with the associated Poles of the power source is connected, while the second lever does not touch any contact one time and the other time it is connected to the changeover switch at the other point through the connection line (c) , so that the one time a series and the other time a parallel connection of the Lamps with the switching resistors takes place. 1 sheet of drawings.