DE29706068U1 - Bell for passive or active notification of people whose sound consists of digitized tones - Google Patents

Description

Description:

Bell for passive or active notification of persons.

State of the art:

Commonly designed bells are usually electromechanical or generate their sound using simple synthesis algorithms.

The invention specified in claim 1 is based on the problem of creating a bell whose signal tones consist of arbitrary sounds such as music, speech, environmental and natural sounds, etc.

The sounds are digitized and stored in a semiconductor memory (1). After the triggering process, the semiconductor memory is read out using a counter (4) and converted into an analog form using the digital/analog converter (2). The amplifier (3) increases the signal so much that a loudspeaker (6) can be controlled. The playback time depends on the sampling rate of the signal and the memory size of the semiconductor memory used. In the present implementation, a playback time of 5s per sound is achieved. When the end of the sound is reached, the playback process is stopped by stopping the oscillator (4).

The invention makes it possible to output any sound as a signal tone when the doorbell rings. The bell can be used as a front door or shop bell, as a stand-alone device, or integrated into a door intercom system.

An advantageous embodiment of the invention is specified in claim 2.
A further development according to protection claim 2 enables problem-free replacement in already existing bell systems since the energy required for operation is obtained directly from the bell transformer (8).

A further embodiment of the invention is specified in claim 3. A further development according to claim 3 enables the output of different sounds depending on external parameters. This could be the direction-sensitive output of sounds when shop bells ring. Thus a different sound is emitted when entering than when leaving a room.

An embodiment of the invention is explained with reference to Figs. 1 to 2. They show:

Fig. 1 the block diagram of the bell

The supply/trigger part (5) stabilizes the operating voltages and separates the start signal. (1) Represents the semiconductor memory. The block marked (4) is the clock generator or the address counter for reading the semiconductor memory. The digital/analog converter (2) converts the signal back into analog form. The amplifier (3) adjusts the level for the loudspeaker (6).

Fig. 2 the wiring of the bell on a simple bell system.

The bell transformer (8) of the bell system provides the supply voltage for the bell and provides a start signal when one of the bell buttons (9, 10) is pressed. The diode (11) ensures that a half-wave of the alternating voltage is always delivered to the bell (7). This half-wave supplies the bell (7) with voltage. When one of the bell buttons (9 button on the apartment door; 10 button on the front door) is pressed, both half-waves of the alternating voltage are delivered to the bell (7). This is recognized as a trigger condition and the sound playback is started.

Claims (3)

Protection claims: 1. Doorbell for use in household or retail stores. characterized in that the signal tone itself consists of one or more digitized tones of any character, which have been stored in a semiconductor memory (1) 2. Doorbell according to claim 1, characterized in that the energy required for operation is obtained from a combined supply/trigger input (0). 3. Doorbell according to protection claim characterized in that the output of the different sounds can be designed according to a certain pattern