JPS59191961A - Telephone bell stopping device - Google Patents

Abstract

PURPOSE:To stop the bell tone of a telephone automatically and instantaneously by detecting the bell AC signal of the telephone and driving instantly a telephone receiver lifter in response to the detected bell AC signal. CONSTITUTION:The bell ringing of a telephone 2 is detected by a coil 14 and then transmitted to a one-shot multivibrator 22 via amplifiers 18 and 20. The multivibrator 22 receives the detection signal and produces a pulse signal to supply it to a solenoid 4. Thus the solenoid 4 is energized to raise up an output shaft. As a result, a switch 32 is turned on to stop instantly the bell tone of the telephone 2. While the pulse of the multivibrator 22 is supplied to a sound synthesizer 30, and the message signal is transmitted to a subscriber of the remote side via an amplifier 16 and a coil 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telephone ring stop device for automatically muting the ringing ring of a telephone.

If you receive a wrong call or a prank call late at night, the ringing bell will be loud and extremely inconvenient. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to automatically mute the sound of the telephone bell when a call is received and the user does not wish to answer the call.

The configuration of the present invention will be described in detail below based on embodiments shown in the accompanying drawings.

2 is a telephone, a solenoid 4 is adhesively fixed to the upper surface of the telephone, and a U-shaped support frame 6 is fixed to the output shaft of the telephone.
The support frame 6 is located on the lower surface of the receiver 8. The solenoid 4 and the support frame 6 constitute a handset field dropout. Reference numeral 10 denotes a case housing an electronic circuit 12 of the present device, and is placed adjacent to the telephone set 2. 14 is an electromagnetic induction coil, 16.18 is an amplifier, 20 is a bell amplifier,
22 is a one-shot multivibrator, 24 is a relay amplifier, 26 is a speaker, 28 is a changeover switch, 30
is a voice synthesizer, which is configured to output a prerecorded message for a predetermined period of time when a trigger pulse is input. 32 is a microphone, and these are connected as shown in the figure.

Next, the operation of this embodiment will be explained.

When an outside line is electrically connected to the telephone set 2 and an alternating current flows through the bell coil built into the telephone set 2, and the bell rings, the bell signal of this coil is electromagnetically induced to the coil 14, and the alternating current flows through the coil 14. A signal is induced. This AC signal is transmitted to amplifier 1
8. After 20, One Shot Multivibrator 22
supplied to The one-shot multivibrator 22 outputs one pulse signal when an electric signal is input to its input terminal. This pulse signal is supplied to the solenoid 4 via the relay amplifier 24, and the coil of the solenoid 4 is excited to raise its output shaft. As a result, the receiver is lifted from the main body of the telephone 2 and the switch 32 is turned on. As a result, the driving of the bell of the telephone 2 is stopped instantaneously after the driving starts. The output shaft of the solenoid 4 momentarily drops after 0.5 seconds, for example, and the switch 32 of the telephone set 2 is turned off by the weight of the receiver set 8. On the other hand, since the pulse of the one-shot multivibrator 24 is input to the speech synthesizer 30, the message signal of the speech synthesizer 30 is transmitted to the amplifier 1.
6. Through the coil 14, the message is electromagnetically induced to the bell coil of the telephone 2, and is transmitted to the other party.

At this time, the voice of the other party speaking through the handset is transmitted to the coil 14 via the bell coil of the telephone set 2, so that it can be heard from the speaker 2G. Also, by switching the changeover switch 28, the microphone 32 can be connected to the amplifier 16.
When connected to the microphone 32, the user can speak to the person on the other end of the telephone through the microphone 32. Incidentally, the purpose of the present invention is to
Since the purpose is to instantly eliminate the bell sound, the voice synthesizer 30, microphone 32, selector switch 28, amplifier 16, and speaker 26 may not be provided.

As described above, the present invention detects the alternating current signal of the bell coil of the telephone by electromagnetic induction with a coil provided outside the telephone, and uses the pulse signal of the one-shot multivibrator which is operated by the induced voltage of the coil. Since the handset elevator is driven instantaneously, there is an effect that the ringing sound of the telephone can be automatically and instantaneously turned off.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram, and FIG. 2 is an explanatory side view. 2...Telephone, 4...Solenoid, 14...
・Electromagnetic induction coil, 18...Amplifier, 22...
One-shot multivibrator, 24...Relay amplifier patent applicant Kenji Mori Buma 1
Yasuo Momose

Claims (1)

[Claims] 1. A telephone ring stop device comprising an electromagnetic induction coil 14, a one-shot multivibrator 22 connected to the coil 14, and a receiver elevator driven by the output pulse of the one-shot multivibrator 22.