DE1206486B - Device on telephone sets for preventing long-distance dialing connections - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

H04m

German class: 21 a3 - 16/32

Number: 1206 486

File number: M 57927 VIII a / 21 a3

Filing date: August 23, 1963

Opening day: December 9, 1965

The invention relates to a device on dials of telephone sets that prevents the establishment of connections whose establishment a greater than a predetermined number of number disc lifts is necessary. In particular, this device is intended to prevent the improper Using a telephone line to establish long distance dialing connections with the aid the self-dialing remote service can be prevented, on the other hand the making of local calls and the ent- ίο acceptance of incoming calls should be enabled. This device should be simple in structure and their assembly, which can also be done afterwards with an apparatus that is already in operation should not require any intervention in the electrical circuit of the apparatus.

There are already a number of devices to prevent the establishment of remote dialing connections However, the demand made for simplicity and simple and subsequent assembly ao are not sufficient without changing the circuitry of the device. All of these devices have one with the drive coupled to the dial, which acts on one or more switching contacts. Usually these devices are too bulky to be retrofitted in a telephone set to be able to.

The invention consists in that a ratchet wheel, which when pulling up the number plate via a drive device is rotated about a tooth pitch and carries a projection that when rotating the Ratchet wheel pushes against a fixed stop by a given number of tooth pitches and so a Repeated winding is prevented, and that by a further device, which is the hook switch of the telephone set is actuated and the ratchet wheel out of engagement with a retaining pawl brings and allows the ratchet wheel to run back into its starting position by means of a spring.

In the device according to the invention, the fact is used that to set up a long-distance dialing connection more digits have to be dialed and thus more number disc lifts are necessary than when establishing a house or local connection. If an attempt should be made improperly, operate the dial several times than is necessary to establish a house or local connection is necessary, the dial is blocked after an adjustable number of actuations and can only be operated again after the hook switch has been operated and thus the Initial recovery has been restored.

Device .an telephone sets for
Preventing long distance dialing connections

Applicant:

Gerard Gaston Edmond Moricot,

Charleville, Ardennes (France)

Representative:

Dipl.-Ing. W. Meissner and Dipl.-Ing. H. Tischer, Patent Attorneys, Berlin 33, Herbertstr. 22nd

Named as inventor:

Gerard Gaston Edmond Moricot,

Charleville, Ardennes (France)

Claimed priority:

France of August 28, 1962 (907 986)

To be able to set the number of permissible number disk actuations, the projection formed on the ratchet wheel as a threaded pin, which is provided in different, on the circumference of the ratchet wheel Threaded holes can be screwed. The drive device is a pawl that connects to the axle the dial is coupled and is guided over a slide rail that it does not come against the The teeth of the ratchet wheel is pressed until it has been moved by one tooth pitch. Thus, at each time the dial is actuated, regardless of the number of current pulses generated advanced by one tooth pitch until the projection has reached the stop.

The ratchet wheel is displaceable in the axial direction so that it goes through when the hook switch is actuated a mechanical clutch is brought out of engagement with a retaining pawl and by the force a spring is returned to its original position.

To explain the invention, an exemplary embodiment is described below with the aid of the drawings described. In the drawing is

F i g. 1 is a perspective view of a device according to the invention,

F i g. 2 a functional diagram of a device in the open position,

F i g. 3 a functional diagram of a device in the locked position,

F i g. 4 shows a perspective view of the device for releasing the lock and

509 757/77

F i g. 5 a telephone set with a device according to the invention.

The device according to the invention comprises an armpit on which a ratchet wheel 2 is attached. This is held in its position by an overlying collar 3 (Fig. 4). The ratchet wheel 2 carries several threaded holes on its circumference, which are intended to receive the movable pin 13 are. Furthermore, this ratchet wheel 2 has a fixed pin 14, which is the starting point of the telephone Lock combination determines.

The ratchet wheel has a helical spring 4 on its upper part, the end of which is suspended from a metal cap 5. This spring is used to return the ratchet wheel to position O after the number has been dialed.

The drive pawl 6 is in its upper position in the teeth of the ratchet by means of a leaf spring? held, which is attached to the metallic cap 5 by means of a screw. A stop 8 locks the moving pin at the end of the combination.

A holding pawl 9 (FIG. 2), which is arranged diametrically opposite the drive pawl 6, works with the teeth of the ratchet wheel.

. A return arrangement consisting of a pusher 10 and a spring 11 is used for lifting of the ratchet wheel 2 by means of two disks 12 and 12 ', which grip under the collar 3, which is fixed to the ratchet wheel is connected and collaborates with it.

For example, if the user wants to restrict a combination to two digits, it will be enough for him to screw the movable pin 13 in the second hole behind the fixed pin (as in Fig. 2 shows).

It can thus be seen that the dial of the telephone set 15, which is firmly connected to the axis 1 carries the ratchet wheel and moves it when a number is dialed. This combination will limited to no more than two digits when the movable pin is in the second position.

However, if the user will set this combination, the movable pin 14 will strike against the stop 8 and the ratchet wheel will be retained by the pawl 9 and cooperate with its teeth (Fig. 3). As a result, the user selects the appropriate combination, and a pressure on the trigger 10 causes the ratchet wheel to be raised by means of the metallic disks 12 and 12 '. The purpose of this movement is to bring the pawl 9 out of the teeth of the ratchet wheel. Then it triggers the movement of the wheel in reverse to the working direction under the action of the spiral spring 4, as the arrow F in Fi g. 3 shows. When the process of returning has taken place, the fixed pin 14 is accordingly in front of the stop (FIG. 2). The set will then be ready for another two-digit combination.

If the user wants to carry out the combination with two digits, it is sufficient to enter his combination and dial his number.

At the end of the conversation, the movable pin 13 is adjusted after hitting it. At the end of Transmission and under the effect of the combination, the movable pin 13 takes its position for one new use again.

The arrangement shows several advantages and features that are that participants with several Devices can set any device with any combination (2, 4 digits, etc.).

In this way, the transmissions can be controlled and improper use prevented or be restricted.

Of course, this mechanical embodiment is not restrictive. One can also Carry out facilities that are operated by electrical means.

The example, for which other types and forms of execution are provided, is also not limiting could without deviating from the inventive concept. "^, ..,

Claims (6)

Patent claims: 1. Device on dials of telephone sets for self-access dialing, which prevents the establishment of connections, to the establishment of which a larger than a given one Number of dial lifts is necessary, characterized in that a Ratchet wheel (2) that moves when the number disk is pulled up via a drive device (6,7) a tooth pitch is rotated and a projection (13) carries the when turning the ratchet (2) pushes against a fixed stop (8) by a given number of tooth pitches and so a repeated winding is prevented, and that by a further device (10,11,12,12 '), the is operated by the hook switch of the telephone set (15) and the ratchet wheel is off brings the engagement with a retaining pawl (9) and by means of a spring (4) the ratchet wheel in its starting position can run back. 2. Apparatus according to claim 1, characterized in that the projection (13) accordingly the desired number of permissible number disk actuations can be changed in its position on the circumference of the ratchet wheel (2). 3. Apparatus according to claim 2, characterized in that the projection (13) is on one end is threaded pin that is spaced in on the periphery of the ratchet wheel a tooth pitch provided threaded holes can be screwed. 4. Apparatus according to claim 1, characterized in that that the drive device consists of a drive pawl (6) which is coupled to the axis of the dial and so is guided over a slide rail (7) that it is not pressed against the teeth of the ratchet wheel (2) until it has been moved by one tooth pitch. 5. Apparatus according to claim 1, characterized in that the actuated by the hook switch Device (10,11,12,12 ') the ratchet wheel moves in the axial direction and brings the retaining pawl (9) out of engagement. 6. The device according to claim 1, characterized in that a further projection or Pin (14) is provided, which serves to limit the start of rotation of the ratchet wheel. Considered publications:
German utility model No. 1749 067. 1 sheet of drawings 509 757/77 11.65 © Bundesdruckerei Berlin