DE3020728A1 - VALUE CARD TELEPHONE - Google Patents

Description

O-Ingilisov-1-70

Prepaid telephone

The invention relates to a prepaid telephone according to the preamble of claim 1.

There are prepaid telephones known in which instead of the conventional throw-in and self-cashing devices an input and reading device for value cards is provided for coins. the Prepaid prepaid card is inserted into the input slot of the reading device and holographically there read with laser beams. The read value is shown to the user on a digital display conveyed. During a call, the credit is continuously debited from the prepaid card and the Reduction shown on the display. At the end of the call, the prepaid card will be sent from Device returned. If the credit has reached zero, the call is interrupted. By The elimination of the cassette for coins largely eliminates the incentive to break open the device. In order to the cost-effectiveness of public telephones is significantly increased (PTT Techn. Mitt. 8/1979, p.4). However, the holographic scanning of the prepaid card is one expensive facility. In addition, since part of the prepaid card remains within reach in a recessed grip, you can Tampering cannot be ruled out

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O.Ingilisov-1-70

lead to operational disruptions. The invention therefore lies the task underlying a simple reading device to provide the greater security against fraudulent or destructive manipulation at least during a conversation - guaranteed. This task is solved by the in the license plate of claim 1 specified features. Further developments can be found in the subclaims. The advantage of these refinements is that the prepaid card can be accessed by the during a call User is withdrawn, so that manipulations are largely excluded. As long as the slide is not closed, the telephone is not ready to talk. During the conversation, the The slider is not opened, this only happens automatically when the handset is hooked in or when the credit is used up.

The invention is explained in more detail using an exemplary embodiment that is shown in the accompanying drawings is shown. Show in it

1 shows part of a prepaid telephone with the prepaid card input device in FIG Front view;

2 shows the value card entry in longitudinal section, on an enlarged scale.

130050/0164

O.Ingilisov-1-70

The housing of the telephone is denoted by 10 in the figures. In the front wall of this case an input slot 2 for value cards 1 is attached, in the middle part of which the front wall has a dome-shaped or similarly recessed grip recess 8. This recessed grip can be closed by a plate-shaped slide 3, which is opened by a spring 7 Position is held. In the example shown, a torsion spring is used, which is a soft one Has spring characteristics. The spring and its arrangement can be seen in FIG. During the one Spring leg is attached to a fixed pin 11, the other leg is with a on the slide 3 attached pin 12 connected.

The slide runs on both sides in a guide 13. It is near its lower edge with a Handle equipped in the form of a pin 14 so that it can be closed by hand. In Fig.2 is the slide shown in the closed state, from Fig.1 both positions can be seen: the The open position is at the lower edge 15, shown in dashed lines, and that which has been retracted into a slot 17 To see pin 14, the closed position on the upper edge shown in dash-dotted lines 16 of the slide. The pin 14 and the torsion spring 7 are also shown in phantom in this position shown.

130050/0164

O.Ingilisov-1-70

Fig.2 shows that the value card 1 with its leading edge is inserted into a spring strip 9, where their contact points from the contact springs of the strip be applied. The card is now electrically connected and can be read. Furthermore, actuated by the inserted prepaid card 1 protruding into its management level contact 6.

When the slide 3 is closed, another contact 5 protruding into its plane is switched. When both contacts 5 and 6 and the hook switch are operated, the locking magnet 4 is energized, whereby its locking pin 18 moves into a corresponding opening in the slide and locks it.

When the locking magnet 4 is switched off, the slide is opened by the torsion spring 7 and the prepaid card can be grasped in the recessed grip 8 and removed. It is switched off either by attaching the Handset at the end of the call, i.e. when the hook switch is operated, or when the credit is available on the prepaid card is used up. The various functions are monitored and controlled by a computer, which is housed in the telephone.

If the slide 3 is closed with the prepaid card 1 inserted, but the handset is not unhooked, so the card is read and the credit is displayed, but the slide is not locked, so that the prepaid card can be removed at any time. When the slide is released, the display goes out again.

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O.Ingilisov-1-70

As an alternative to the embodiment shown, an arrangement of the slide 3 rotated by 180 ° is also possible. The spring can then be omitted because the slide is opened by gravity. By turning Fig. 1 at 180 ° the relationships become apparent. The pin sits near the top of the slider. The latter will pushed up to close. All other functions remain unchanged.

Of course, the value card entry can also be attached to a pay phone so that calls can be made can optionally be carried with prepaid cards and / or coins.

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Claims (5)

ο η ο η π ο ο STANDARD ELECTRICAL LORENZ OU Z. U! £ Ό SHARED COMPANY O.Ingilisov-H.Ruzic-1-70
E 12892 Claims \ J \ J. Prepaid card telephone with an input and reading device in whose input slot prepaid cards can be inserted for operating the device, characterized in that the input slot (2) can be closed by a slide (3) which, when the prepaid card (1) is inserted, is closed by a blocking magnet (4) is lockable. 2. prepaid telephone according to claim 1, characterized in that that the slide (3) is opened by a spring (7). 3. prepaid telephone according to claim 2, characterized in that that the spring is a torsion spring (7). 4. prepaid telephone according to claim 1, characterized in that that the slide (3) is opened by gravity. 5. prepaid telephone according to claim 1, characterized in that that the blocking magnet (4) depending on the switching state of the hook switch, one of the prepaid card (1) actuated switch (6) and a switch (5) switched by the slide (3) computer-controlled is working. 05/07/1980 Gei-Sr 130050/0164 ORIGINAL INSPECTED