DE2336808A1 - SOUND ENERGY GENERATING DEVICE - Google Patents

Description

THE BENDIX CORPORATION, Executive Offices, Bendix Center, Southfield, Michigan 48 075, USA

Acoustic energy generating device

The invention relates to a sound wave generating device and in particular a device for generating a rotating wave of acoustic energy.

It has been known for years to have a A better cleaning effect is achieved if a high-frequency electrical energy is fed to sound transducers to the cleaning medium

-en vibrate. This vibration / of the cleaning medium however, they can cause air bubbles to form in the medium. If the vibration of the medium is not interrupted, so the air bubbles collect. An interruption in the high-frequency electrical energy, polygamy being fed to the transducers, allows the air bubbles to collect in the medium to be cleaned and rise to the top. If then the cleaning medium is re-energized, a better cleaning effect is achieved. It was common to use high frequency electrical energy, polygamy the sound transducers is fed to pulsate with 60 or 120 Hz, these cycles with the frequency of the AC mains voltage are synchronized. However, this frequency need not be the most desirable repetition sequence. In the US patent No. 3,638 Ο87 entitled "Gate Controlled Power Supply for Sound Cleaners" discloses a method for

409812/0363

Determine the optimal repetition sequence or repetition frequency and the Pulse duration of a sound cleaner.

But even when determining the optimal pulse duration and repetition sequence of a sound transducer, standing waveforms can form in the cleaning medium. By eliminating or reducing of the standing waveforms or images produced by continuous or periodic interruption of the high frequency electrical Energy source arise, a better cleaning effect can be achieved. The standing wave images lead to the Generation of a frequency that is always present in a cleaning container. Due to the standing wave patterns many air bubbles are trapped in the medium to be cleaned. The process of »removing the air bubbles from the medium to be cleaned, is known as degassing.

When the sound generator is turned off for a second or two these air bubbles rise to the surface. Degassing can be accelerated by manually turning off the generators. and turns on, but this can be a tedious process. Even assuming that the sound generator is switched off for a second and is switched on for a second, leads to the creation of a standing waveform in the medium to be cleaned. When the generator is turned off, the standing waveform begins to fall or disappear after renewed However, when the sound generator is switched on, the standing wave, which has partially disappeared, is amplified again to its original state Energy value. During the time during which the sound generator is switched off, the degassing process can begin, whereupon the bubbles rise to the top. However, only a part of the bubbles can reach the surface of the medium, whereby the rest remains trapped in the medium.

Switching the sound piercer on and off increases the cleaning effect of the medium, but a much better cleaning

409812/0363

gung effect can be achieved by the present invention, in which a humming operation or working method (ripple operation)

will
achieved/. The hum operation can be achieved by changing the energy waveforms in the tank. This is achieved by switching the output of the sound generator to sound transducers located at various points around the baffle of the tank, as is achieved in the present invention. According to the present invention, different sound generators are used and connected to different loads. In that only one sound generator is switched on, and therefore only one Xiandler vibrates the diaphragm. the energy values through the medium to be cleaned in the tub or container are different. If the first sound generator is switched off and another sound generator is switched on, the energy value changes through the medium to be cleaned. The energy value continues to change when other transducers are energized, in a specific order. For different energy values, however, bubbles of different sizes are generated. By periodically changing the energy value in the medium, the bubbles rise to the surface, forming a bubble of different size or size. If several different transducers are connected to the baffle or diaphragm, an almost continuous change in the energy values can be achieved. Therefore, the bubbles rise continuously to the surface and there is essentially no time wasted in cleaning or degassing. However, using a dedicated sound generator for each transducer can be very expensive. The object of the present invention, which has the features outlined above, can, however, be manufactured and used much more economically.

It is an object of the present invention to change the sound energy form or image in a cleaning tank so that thereby the air bubbles, which can collect, are given the opportunity to rise to the surface of the medium to be cleaned.

409812/0363

It is also the aim of the present invention to switch the output of a single sound generator to different loads, so that thereby a single sound generator can be used to "energize" other sound transducers in turn.

It is also an object of the invention to reduce the noise level to reduce the number of sound generators that are required to achieve a humming operation.

The present invention is also intended to switch the sound generator from one sound transducer to another, namely to a point in time at which the output from the sound generator was interrupted, thereby reducing the service life of the switching devices is greatly increased.

The invention also relates to the energy value in a medium to change by switching a sound generator to different transducers and in a certain way and with an optimal operating cycle.

The present invention is also intended to reduce the performance requirement can be reduced to achieve a good cleaning operation.

Further advantages and details of the invention emerge from the following description of an embodiment with reference to the drawing.

It shows!

1 shows a block diagram of a device for generating a rotating acoustic energy wave;

Fig. 2 is a partially schematic circuit diagram of a portion of the device for generating a rotating Sound energy wave in Figure 1;

3 is a schematic circuit diagram of a portion of the

Λ 0 9 8 1 2/0363

23368

Device for generating a rotating sound energy wave in Figure 1; and

4 shows a voltage-time diagram for the device for generating a rotating acoustic energy wave which is shown in Figures 1 to 3.

InFigur 1 is a block diagram according to a method for Switching on (rotating) the output of a single sound generator on different sound transducers shown. Since a certain type of a Time control mechanism is required, a pulse generator 10 is used to control the switching operation. The output size of the pulse generator 14, which has the shape of a sharp voltage spike, is in the forming stage 12 in a more suitable Waveform converted. After receiving the pulse from the pulse generator 10, the former stage 12 interrupts normal operation of the sound generator 14 by running the generator 14 through the generator lock or shutdown circuit 16 turns off. Although many different timing pulses can be used and the sound generator 14 can be switched off or interrupted for different time periods, according to the invention a time control pulse from the pulse generator 10 for use and this appears every second. The switch-off time of the sound generator 14 is 0.2 seconds. This is only chosen for better explanation and will be explained more in the following described individually.

The former stage 12 is also via a buffer circuit 18 with a Delay line 20 connected. The buffer circuit 18 is amplified the voltage from the former stage 12, that of the delay circuit 20 is used. The purpose of the delay circuit 20 is in preventing any switching process until the output variable from the sound generator 14 is completely interrupted is. Any voltage resulting from the pulse generator 10 is received by the delay circuit 20 and after a small delay period gives the delay circuit

409812/0363

20 an output variable. The output variable from the delay circuit 20 reaches a counter 22. After the output variable has been received from the delay circuit 20, the counter de-excites one of the pormer stages 24 to 30 and excites another former stage. For a better explanation it is assumed that the pormer stage 24 is energized and that pormer stages 26, 28 and 30 were de-charged. Therefore, when the counter 22 receives the pulse from the delay circuit 20 receives, the output variable running to pormer stage 24 is interrupted and a voltage is sent to pormer stage 26. Each of the forming stages 24, 26, 28 and 30 energizes its own relay switch, so that the forming stage 24 and reed relays 36 energized and the former stage 30, the reed relay 38 energized. Since the output of the sound generator 14 is fed to each of the reed relays, 32, 34, 36 and 38, what a relay is excited »results from the excitation of the converter connected to it. When the former stage 24 receives a voltage from the counter 22 has received, the reed relay 32 is energized, the output variable from the sound generator 14 through the reed relay reaches converter 40. After receiving the pulse from the delay circuit 20 interrupts the counter 22 the pormer stage 24, whereby the reed relay 32 is de-energized. The sound generator 14 is no longer connected to converter stage 40. When the counter 22 outputs an output voltage to the pormer stage 26, so the reed relay 34 is energized, so that thereby the output reaches the transducer 42 from the sound generator 14 through the reed relay 34. It should be emphasized that the switching of the reed relay 32, 34, 36 and 38 takes place while the sound generator 14 is through the generator switch-off circuit l6 is switched off. This will cause detrimental sparking on the reed relays 32, 34, 36 and 38 avoided and the life of these devices is increased. After receiving another pulse from the pulse generator by the former stage 12 and the buffer circuit l8, there the delay circuit 20 sends a further output pulse to the counter 22. At this point in time, the output variable becomes the forming stage 26 ends and the former stage 28 receives an output

409812/0363

size. It is therefore de-energized the reed relay 34 and the reed relay 36 is excited. When the sound generator 14 through the generator shutdown circuit 16 is switched on again, the sound output variable passes through the reed relay 36 to the transducer 44. After receiving yet another pulse from the pulse generator 10, the delay circuit 20 sends another one Pulse to counter 22. This turns the output variable into the former stage 28 ended and an output variable for the Ponr-Erstüfe is reached 30, which energizes the reed relay 38, while the reed relay 36 is de-energized..When therefore the sound generator 40 again is switched on by the generator switch-off circuit l6, the output of the sound generator 14 passes through the Eeed relay 38 to converter 46.

only
Although four transducers, forming stages, and reed relays are shown in the / embodiment, any number of transducers and reed relays can be used with suitable counter circuitry. The output of the sound generator 14 can therefore be rotated to any number of sound transducers . The subject matter of the present invention was primarily developed for a cleaning operation in which the transducers are connected to a baffle (diathragm) of a cleaning tub. If the transducers 40, 42, 44, 46 are arranged at a suitable distance on the baffle of the cleaning tub, the medium to be cleaned, which is contained in the tub, can be set in vibration with high-frequency visual energy. The purpose of switching the output of the sound generator 14 to other transducers is to change the energy value within the medium to be cleaned. Although the frequency supplied by the sound generator 14 in the medium to be cleaned is the same throughout the medium to be cleaned the energy value in the immediate vicinity of the transducer that is excited is greatest, so that the energy value decreases with increasing distance from the transducer that is excited, by switching the world from one transducer to the next or

409812/0363

- ο -

For others, the energy value in the medium to be cleaned is constantly changing. As is normally in a medium to be cleaned Form bubbles of different sizes due to the different energy value supplied by the sound generator 14 when the energy value is changed, the air bubbles that were formed earlier can go to the surface rise. This degassing process occurs continuously in a medium to be cleaned, which has different energy values the medium has therethrough.

The object of the present invention was made for use developed in connection with a medium to be cleaned and a baffle, with which the medium to be cleaned in a tub is vibrated. However, it should be emphasized that the subject matter of the present invention can be used with any other type of medium can be used, which requires different amounts of sound energy that are supplied to the medium.

With reference to FIGS. 2 and 3, a possible implementation of the device will now be described, which is shown and described schematically in FIG. The voltage used in the present system is labeled ⁺ V _dc. The voltage + V. reaches the pulse generator 10. A Zener diode 48 is connected between + V, and the resistor 50, which leads to ground. Resistor 50 provides a base bias for transistor 52. The emitter of transistor 52 is connected to + V via resistors 5 ^ and 56. connected, the resistance being variable. After the pulse generator 10, the voltage + V. has received, the transistor 52 begins to conduct immediately, since the base of the transistor 52 is at a lower voltage than the emitter of the transistor 52 is. If, therefore, the transistor 52 conducts, the capacitance 58 is charged and a ramp-shaped voltage is produced. When the capacitance 58 begins to charge according to a ramp-shaped voltage, this voltage reaches a certain value when the unijunction

409812/0363

Transistor 60 begins to conduct and then capacitance 58 is discharged through a resistor 62 with a low resistance value. The other side of the unijunction transistor 60 is connected to the voltage ⁺ V _dc via the resistor 64. The discharge time of the capacitance 58 is very short compared to the charge time. The output variable of the transistor 52 therefore appears in the form of a sawtooth voltage.

The unijunction transistor 6ö, which is similar in many respects to a field effect transistor, differs from this type of transistor in particular in that it has only one pn junction. It differs from the field effect transistor in that in normal operation the transition is forward biased. The timing of the pulse generator is controlled by the variable resistor 56. By changing the resistance value of the resistor 56, the charging time of the capacitance 5-8 _s, which controls the ignition of the unijunction transistor 60, can be changed directly

The output voltage from pulse generator 10 appears across resistor 62 and is illustrated as waveform A in FIG. This output voltage consists of a voltage spike that occurs approximately every second and has a negative section that results from the discharge of the capacitance 58. The letter A in FIG. 2 represents the point at which the output voltage corresponding to waveform A in FIG. 4 was measured. This output voltage A from the pulse generator 10 passes through the diode 66 to the shaping stage 12, namely to the transistor 68. The negative portion of the output variable of the pulse generator 10 is diverted to ground via the resistor JO , with only the positive portion through the diode 66 Section through resistor 72 at the base of transistor 68 is developed. The collector of the transistor 68 is connected to the voltage ⁺ V _dc via the resistor 74. Therefore, if the base of the transistor 68 becomes positive with respect to the emitter, namely by receiving a negative voltage via the diode 66, the Tan-

409812/0363

sistor 68 in the conductive state. When transistor 68 begins to conduct, the collector of transistor 68 essentially reaches ground potential. Any voltage developed at the collector of transistor 68 passes through resistor 76 to transistor 78. Therefore, when transistor 68 is conductive, transistor 78 is non-conductive since the base of transistor 78 is at the same potential as the emitter of transistor 78 is located. When transistor 78 is non-conductive, substantially all of the ⁺ Vj voltage is developed by resistor 80 at the collector of transistor 78. The voltage at the collector of transistor 78 appears in Figure 4 as waveform B. The ON time of waveform B in Figure 4 is 200 milliseconds and the OFF time is 800 milliseconds. According to FIG. 2, a feedback loop with a diode 82, the resistor 84 and a variable capacitance 86 is provided. The charging tent of the capacitance 86 determines or controls the pulse width of the output voltage B. The resistor 78 connects the feedback loop to the voltage + V _dc .

This output voltage B i is applied to the buffer stage 18 and to the generator cutoff circuit 16. The input and output waveforms of the buffer circuit 18 are the same, the output waveform corresponding to waveform C in FIG. The buffer circuit 18 is required, however, in order to provide the necessary energy for the operation of the delay circuit 20. The output of transistor 78 reaches transistor 90 via resistor 88, the collector of transistor 90 being connected to voltage ⁺ V _d via resistor 92. The output of transistor 90 is the inverse of the voltage that runs across resistor 88. By sending the output of transistor 90 through resistor 94 and another resistor 96, a double reversal occurs with a substantial increase in driving force. The collector of transistor 96 is connected to + V ₁ through resistor 98.

ac

409312/0363

- 4.1 -

The generator _{switch-off circuit 16 #,} which is connected to the output of the transistor 68, receives the waveform B and this reaches the base of the transistor 102 via the resistor 100. The output of the transistor 102, measured at the collector of the transistor 102, is inverted with respect to the input variable . The collector of transistor 102 is connected to voltage + V i via resistor 104. A further reversal takes place when the output of transistor 102 is fed through resistor 106 to the base of transistor 108. The collector of transistor 108 is connected to + v " _{d (J} ) via resistor 110. A double reversal or inversion of input waveform B has therefore already taken place at the collector of transistor 108. This also inverts the input signal again. Various stages are required in the generator shutdown circuit to provide the driving force required in the output stages. Therefore, when waveform B becomes positive, the output of transistor 112 drops to zero, which means that the transistor 112 connects the input of the sound generator 14 to ground or earth. If the input to the sound generator 14 is connected to ground or earth, this means the end of any possible output from the sound generator the output of the sound generator would be interrupted.

Although not done in the preferred embodiment is, there is a further possibility to interrupt the sound generator 14 and that could be with the help of a gate network happen, so that the output of the sound generator 14 is interrupted by a gate device or gate will. This would create the possibility that the sound generator 14 can continue to work and only the output during those page periods in which the switching process is carried out. The interruption would be 200 milliseconds correspond to which waveform B is positive. It can

409812/0383

however, problems with the use of a conventional gate network arise because some negative voltages can occur in the generator shutdown circuit * However, silicon-controlled Rectifiers work in a gate control arrangement if they meet the frequency requirements. The possibility described here or method of interrupting the output variable of the sound generator 14 is only one of many possibilities and possible Procedure to achieve this,

The output variable from the sound generator 14 comes when it is not interrupted by transistor 112, to reed relays 32, 34,36 and 38. Whatever reed relay 32, 3 ^, 36 or 38 is energized at the time, it can be the output variable from the sound generator 40 joieils the correct transducer 40, 42, 44 or 46 excite, transforming the electrical energy into mechanical Energy converted, wii-d. Although the present invention was designed and developed in connection with a cleaning function, this device can also be used with any other System type are used in which a high-frequency mechanical energy is required, which through a medium can be changed.

In Figure 3, the waveform C passes from the transistor 96 to the delay circuit 20 and via the resistor 114. At the beginning of the reception of the waveform C and any positive voltage of this waveform, the capacity must be loaded 116 _a before the diode II8 the voltage for Base of transistor 120 transmits. The charging of this capacitance II6 provides: the delay which is introduced by the delay circuit 20 or which occurs in this «. The resistor 122 provides a discharge path for the capacitor 116 when no voltage is received via the resistor 114 "Upon reception of the voltage of the waveform C and the charging of the capacitor IL6 _s which ca, 40 milliseconds claims ₃ starts illustrates transistor 120 to conduct, with current flowing from the current source ⁴ V via resistor 124 to ground.

409812/0363

While the transistor 120 is conductive or is in the conductive state, the ground potential is transmitted to the base of the transistor 128 via the resistor 126. Transistor 128 provides a second inversion of the input waveform C. Thus, if there is a positive voltage at point C, there will also be a positive voltage at the collector of transistor 128 after capacitor 116 is charged. This means that essentially no current flows through the resistor 130, since the transistor 128 is in the non-conducting state. The output of transistor 13 ^ is measured between a voltage divider network consisting of resistors 136 and I38. This output, which in Figure 4 corresponds to the waveform D ₀ is always positive. When the transistor 13 is in the conductive state, its output drops to a lower voltage. If, however, the transistor 13 is in the non-conductive state, the output remains at almost the same voltage as the Waveform C or the voltage ^{+ v} _dc

With reference to FIG. K, it can be established that the period of time during which the wave firm C has a positive voltage at v / e is approximately 200 milliseconds. However, the waveform D drops to a lower voltage value for about ΙβΟ milliseconds. There is a delay of approximately 40 milliseconds between the time at which waveform C becomes positive _s and the time at which waveform D decreases in value. This delay comes from the delay circuit 20 and is brought about by charging the capacitance II6.

In order to come back to FIG. 3, the output variable is used the delay circuit 20 or the waveform D sum counter 22. The ffihler 22 consists of two astable flip-flops ^ the are interconnected. The counter circuit 22 will be briefly described. After receiving waveform D through the

409812/0363

Capacities 140, 142, 144 and 146 at stages 148, 150, 152 and 15 ² J, one of these stages will be energized before the others. Although all stages are alike, there is minimal difference by which one stage is caused to enter the aroused state before the other three stages. The diodes 156 »158, I60 and I62 lead the input signal to the base of the transistor 16 **, 166, 168 and 17O, respectively. Without going into further details of the resistor arrangement, each side of the diodes 156, 158, 160 and 162 are connected to the voltage ⁺ V _dc through identical resistor arrangements. It is now assumed that it was stage 148 that was excited first, the subsequent effect and processes being as follows: If the first negative-going pulse is received by counter 22, stage 148 is closed conduct, thereby delivering a positive voltage on the # 1 terminal, illustrated in Figure 4 as counter waveform # 1. This waveform remains positive until a third pulse is received from delay circuit 20. Simultaneously with the positive of the counter output 3 # 1, the counter output terminal # 3 goes negative and .This remains negative until the third pulse from the delay circuit 20 is received. Upon receipt of the second pulse from delay circuit 20, stage 150 ceases to be conductive and the voltage measured at output terminal # 2 becomes positive. At the same time the output at Φ 4 goes negative. These waveforms remain unchanged until the fourth pulse from cfer delay circuit 20 is received. These waveforms can be seen from Figure 4 and that as a counter waveforms £ l _t # 2, # 3 and # 4. It should be emphasized that none of the holding processes occurs in the counter 22 until after the 40 millisecond delay as specified by the delay circuit 20

Only one of the forming stages shown in Figure 1, namely forming stage 30, is shown in full detail. The output as of stage 154, which is the counter waveform Φ 4,

409812/0363

reaches formers stage 30 via the capacitance i? 2 to the former stage 30 ° Only with positive signals from the counter output # ¹ I the former stage 30 becomes conductive, since the capacitance 1-2 is discharged through the resistor 174. This developed across the resistor 1? 4 duron voltage is applied the diode 176 of the transistor 178 sur base _S so that the transistor 178 in. The lei-is brought cssden maintenance. Therefore, when the Zählerwelleribrm # 4 _S AEI is shown in FIG H. becomes positive, the shaper waveform becomes negative «The duration of the negative portion of the waveform of the forming stage 30 will be described below» Resistor ISO supports the provision of bias for the base of transistor I780 Resistor 182 connects the collector of transistor 178 to the voltage ⁺ ^ _dc "The ^ output from the transistor 178 passes through the resistor 184 and the transistor 186 ₉ so that a double return of the waveform D is achieved." The collector of the transistor 186 is via the resistor I88 with the voltage ⁺ ^ _d connected »The output of the transistor 186 is used to} drive the output transistor IS9» softer the coils 190 of the reed relay 38 controls. As long as that is, the transistor I89 is in the conducting state _s is the reed switch closed 38, since the winding 190 excited isto BiB time period during which the reed ° Reiais 3S is closed and the coil is ISOerregt, is determined by a © HSekkopplungssciieife , which is led to the base of the transistor 189 «, the feedback network consists of a diode I92 _fJ -slnem Ui äs i ° st at el 19 ¹ I and a capacitance 196 _s in series from the base of the ΐί. = & Ώ» transistor 189 for 3asis of the transistor 178 are connected, ""? * "liv.eh the voltag-ng * is aaö about dan resis & I96 applied to the HüelckopplMigsnetzwerk * the charging of the capacitor I96 kopplungsnetsiisrk in demRÜGk = bsstiisait the 2eitöa" he _s -i; & s :? @nel which cls2 ° transistor 186 is switched off unfl ώ © ^ feeiBlstOi ³ 1? 8 oneings = switched, fcaw, in the conductive Si'.stan3 "-3® is ₃ so ciaß« Sa »through the translsto :? 189 is conductive ναιά uis üiskliing 190 s ^ is excited ο If ei-no; tl di-s capacity 196 has reached a certain charging voltage, ■ ^ i changes to the? Z \ micuiü τοώ jsäemfiSE »Translsio--

-Ä0S812 / 0383

- Io -

ren 17 £, 186 and j® in former stage 30. By correct setting of the capacitance I96, the transistors change their state during of the second following pulse from the delay circuit 20 to the counter 22. This ensures that the reed relay can only be switched when no power is received from the switching generator 40, thereby reducing the service life of the Reed relay 38 is increased significantly. The former stages 24, 26 and 28 operate in the same way as former stage 30. When a particular reed relay is energized, its contacts are closed, whereby the output of the sound generator 14, when it is no longer interrupted, by the specific Reed relay can reach the connected converter.

In Figure 1, a pulse is generated by the pulse generator 10 the output of the pulse generator 10 has been changed to an appropriate waveform in the forming stage 12, it becomes the output out of the former stage 12 to the generator shutdown circuit l6, which cancels the input of the sound generator 14 by connecting it to ground or earth. When the input variable of the sound generator 14 is grounded, no sound output is generated, although this is physically connected to the reed relays 32, 34, 36 and 38

the end

connected. At the same time, the output size / the former stage 12 through the buffer circuit iS, through which a extra driver size for the delay circuit 20 is provided will. The output variable from the delay circuit 20, which is delayed by approximately 40 milliseconds, reaches the counter 22. With the first pulse from the pulse generator 10, the counter excites one of the shaping stages, either 24, 26, 28 or 30. Whatever is always energized for a former stage, the correct reed relay 32, 34, 36 or 38 is energized in each case. By energizing the winding of the reed relay closes the contacts and the correct transducer 40, 42, 44 or 46 can do the Receive output from the sound generator 14 as soon as the earth is removed from the input or the input.

4 0 9 8 12/0363

With further development and port step in the technology, it can be seen that different components of the present Systems can be improved or manufactured by x-company Components can be replaced. The electronic circuits in the present system can be integrated as Circuit executed v / earth.

A common application of the subject matter of the present invention is to connect the transducers 40, 42, 44 and 46 to a baffle (diaphragm) of a tank to thereby to vibrate the cleaning medium in the tank, as already described. Assume the tank dimensions 3 50 inches with four 18 χ 25 inch membranes, which "shape the bottom of the tank. By applying the present In the process, each baffle can be set to vibrate individually in a certain way. Since the energy value is within the medium to be cleaned depends on how close it is to the vibrator that is being excited, so it can pass through Changing the excitation point of the medium to be cleaned, also changing the energy value through the medium to be cleaned. The change in the energy value within the medium to be cleaned enables the gas bubbles that are in the Medium have developed to rise to the top. The subject of

The present invention can be applied to any other Bring system type to use in which there is a requirement to change the value of a high-frequency mechanical energy and to deliver at different points of a substance.

. The present invention is therefore not in the field limited to sound cleaning.

All details which can be seen in the description and shown in the drawing are important for the invention.

409812/0363

Claims (8)

Claims Sound energy generating device for changing energy waveforms, characterized in that it has the following devices and features: a sound energy source (14); means (10) for generating a timing pulse; means (16) for interrupting the source of sound energy for a short time interval when that device (16) receives the timing pulse from said device (10); Switch means (22, 32-38) responsive to the timing pulse, said switch means (22, 32-38) being connected to the source of sound energy (14) are connected; a plurality of loads (40-46) connected to the switch means (22,32-38) are, the switch means (22, 32-38) and the loads (40-46) being arranged so that between each timing pulse only one load is energized and then another load is energized until all loads have been energized, whereupon the cycle repeats. 2. Apparatus according to claim!, Characterized in that a delay device (20) is provided in order to delay the response behavior of the switch means (22, 32-38) to the timing pulse, wherein the delay in the response to the timing pulse of the acoustic energy source (14) is made possible by the interruption device (60) to be completely interrupted before the load to be excited by the switch means (22, 32 - 38) is changed, and that all switching operations of the switch means (22, 32 - 38) in this short time interval mentioned are executed. 3, device according to claim 1 or 2, characterized in that the Switch means (22, 32-38) have the following devices and features: Relays (32-38) to the sound energy source (14) with connect the loads (40-46); a counting device (22) for 409812/0363 _ _ _Ig 233680B Excitation of the relays (32 - 38) to a cyclical operation of the Loads (40 - 46) to be provided depending on the timing pulse » 4. Apparatus according to claim 1, characterized in that the interrupting device (16) the sound energy source (14) - during said short time interval is grounded. 5. Apparatus according to claim 1, characterized in that the loads (40-46) consist of converter devices that are used to convert electrical energy into mechanical energy that the Loads (40-46) arranged at a distance from one another on a baffle are to generate changing energy values in a medium to be cleaned. 6. Apparatus according to claim 1, characterized in that the device (10) a unijunction transistor network to generate the timing pulse contains, which generates the timing pulse. 7. Apparatus according to claim 1, characterized in that a shaper circuit (12) is provided in order to change the timing pulse into a voltage with a certain duration and a certain value. 8. Apparatus according to claim 3, characterized in that the forming device (24-30) is inserted between the counting device (22) and the relay (32-38). 409812/0363 Blank page