DE3657C - Signaling device for telephones - Google Patents

Description

1878.

Class 21.

ADOLPH PARIS in ALTONA. Signaling device for telephones.

Patented in the German Empire. of February 9, 1878.

The purpose of this device is to make it secure by connecting it to the telephone and to establish simple signaling devices between the telephones without special Lead wires to be needed.

Signaling is done automatically at every station. turned on an electric bell, while at the same time converting the speaking wires into conductors for signaling the telephone itself happens as soon as it is placed in a funnel on the set will. The funnel is connected to a switching device and is when the instrument is picked up, it is depressed by its weight, thereby making the connection the lead wires to the signaling apparatus is made while simultaneously making the connection the former is interrupted by the telephone.

In the accompanying drawings, the device is shown, namely Fig. 1 is a Front view, FIG. 2 a side view in section, FIG. 3 a view from the rear; Figures 4, 5 and 6 are explained in the drawing itself.

Such a device is located at both stations between which people speak. . The two wires between the stations are marked I and II in the drawing, they are connected to the apparatus by the clamping screws α and b. Instead of a second lead wire, an earth lead can also be used in a known manner. The two telephone wires υ and w become. connected to the apparatus by the clamping screws c and d ; one wire leads to the metal piece e, in which the metal rod .Z ?, which is connected to the funnel A serving to hold the telephone, moves up and down within the insulating rubber sleeve η.

When the telephone is used, the funnel A is raised by the action of the helical spring, and the connection of the two telephone wires ½ and w with the conductors I and II is established as follows. The wire W passes through the connecting wire w 'to the metal piece of e (s. Fig. 4) and further through the contact of the ring of the metal bar h B by the latter and the connecting wire w ^1' through b to the clamping screw and the wire II, while the wire ν goes through the connecting wire ν ¹ to a metal piece i and from here through ν ' ^l to the clamping screw α in the lead wire I. The set is now ready for telephoning.

The permanent position of the telephone while not speaking is in the funnel A, and then the signaling mechanisms of both stations are switched on, whereby the signaling is possible in both directions. The weight of the telephone depresses the funnel A so much that the metal rod B hits the small metal piece ο . As a result, the electric bell on the device is switched on, while the connection with the telephone wire w is interrupted, since the contact between the piece e and the ring / 2 ceases. With the aid of a Morse key or a push button D (see Fig. 5), a current can now be conducted to an electric bell G ¹ , which is located on the apparatus of the other station, and vice versa, a current can be sent from the other station to the bell G reach. This signaling can continue until the two telephones have been picked up for telephoning. As soon as this has happened as a result of the signal, the apparatus is ready for telephony as previously described.

Claims (1)

Patent claim: The signaling device for telephones, which by the dead weight of the instruments Activation of electric bells at the two stations, and which ones without special ones Lead wire acts in the manner described above and illustrated in the accompanying drawing is. For this purpose 2 sheets of drawings.