DE439969C - Number switch for self-operated telephones - Google Patents

Description

GERMAN EMPIRE

ISSUED ON FEBRUARY 21, 1927

REICH PATENT OFFICE

PATENT LETTERING

CLASS 21 a ³ GROUP

(S 69845 Vlll \ 2ia?)

Siemens & Halske Akt-Ges. in Berlin-Siemensstadt *).

Number switch for self-operated telephone systems. Patented in the German Empire on May 2, 1925.

It is already used for number switches to emit power surges in telephone systems with voter operation has been proposed to increase the pauses between the individual series of current impulses of a selected Number the finger stop that limits the elevator movement of the number switch, to be movable in order to increase the angle of rotation of the setting disk. By designing the finger stop in this way becomes an enlarged idle without enlarging the dial of the number switch or providing others achieved the switch taxable intermediate links. This idling aims at a safe one Setting of the switching mechanisms influenced by the number current impulses. With the known Number switches with a movable finger stop, the adjustment of the finger

ao stop when handling the number switch in one or the other Direction of rotation of the switch either under the action of a spring or by entrainment by means of stops of the adjusted Adjusting member.

According to the invention, there is now a particularly simple arrangement with a movable finger stop achieved in that when the number switch is operated, the position of the finger stop is only changed by whose own weight is brought about.

This allows special driver devices for the movable finger stop, such as B. springs, pins o. The like., Avoid what in mass production such number switch allows a substantial manufacturing discount.

The arrangement can be made according to the invention such that the movable Finger stop when lifting the focusing screen (e.g. by the Finger) is brought into the working position and from this by its own weight into the Rest position decreases.

*) The patent seeker stated as the inventor:

Kurt Böhme in Berlin-Siemensstadt.

The number switch can also be designed according to the invention in such a way that that the movable finger stop when the setting screen is lifted by its own weight goes into the working position and when the adjusting disk is reversed in itself known Way brought into the rest position by a driver and kept locked in this will.

ίο The invention is in the drawing to two Embodiments shown.

Fig. Ι shows the number switch for itself in plan view.

Fig. 2 is a side view of the number switch of Fig. 1 at a station only partially shown.

Fig. 3 shows another embodiment of the invention in plan view.

On the number switch shown in Figs. 1 and 2 is the rotating dial with i, the finger! Openings are denoted by 2 and the movable finger stop is denoted by 3. 4 is the basic '; plate, the contact spring sets, not shown here on the rear side thereof in a conventional manner, the shim to the impulse spring and the brake controller transmitting gears are disposed the flow movement of the \ switch controlled brake regulator and the other, the turning movement. The movable finger stop 3 is loosely mounted below the dial 1 with its arm 5 on the rotatable axis 6 of the number switch. As a result of the inclined position of the number switch on the front of the station 7, which is inclined in the form of a desk (Fig. 2), the finger stop 3 tries to assume its lowest position, the rest position, in which it rests with its arm 5 against the pin 8 of the base plate 4 applies.

If the adjusting washer 1 for the purpose of manufacture a connection of one of the openings 2 marked with numbers in the direction of the arrow adjusted, the inserted finger of the j User at the end of the adjustment movement of the j disk 1 against the movable finger | hit 3 and take him with you until he goes against! the pin 9 to the other side of the moving-: borrowed finger stop. The adjustment! movement of the disk 1 is thereby borders, and this now runs after removal i of the finger from the selected opening 2 of the I. Washer 1 under the action of a spring (not shown) that is tensioned when it is pulled open in FIG their rest position back, and at the same time in a known manner by influencing of the interruption springs, current surges are sent to the exchange via the connected line of the intercom. At the Letting go of the dial 1 also comes the movable finger stop 3 under the Influence of its own weight shortly before the setting screen 1 returns to its rest position. The switch is now in its rest position again and allows setting the next digit of the desired number. In this position, the finger stop 3 be held by an approach of the adjusting disk to allow adjustment of the movable To prevent finger attack from its rest position when the switch is in its rest position.

In the embodiment of Fig. 3, the movable finger stop 3 in its rest position held by a stop 10 of the adjusting disk 1. Will this stop 10 removed by adjusting the disc 1 from the finger stop 3, so he moves by its own weight in the working position, which by the pin 9 of the base plate 4 is limited. When the adjusting disk ι expires, the pin 10 comes in again Touching part 5 of the finger stop 3 and bringing it back to the rest position, in which he is now held between the two pins 10 and 8 as long as the switch is not used.

Claims (3)

Patent claims: 1. Number switch for self-operated telephone systems, with a die Movable finger stop limiting elevator movement, characterized in that that when the number switch is operated, the position of the finger stop (3) only changes is brought about by its own weight. 2. Number switch according to claim 1, characterized in that the movable Finger stop (3) when lifting the adjusting disk (1) compulsorily (e.g. by the finger) is brought into the working position and from this goes back to the rest position by its own weight. 3. Number switch according to claim 1, characterized in that the movable Finger stop (3) when lifting the adjusting disk (1) by its own weight goes into the working position and when the adjusting washer (1) moves backwards in brought into the rest position in a known manner by a driver (10) and is kept locked in this. 1 sheet of drawings.