US3761732A - Rotating sonic energy wave - Google Patents

Rotating sonic energy wave Download PDF

Info

Publication number
US3761732A
US3761732A US3761732DA US3761732A US 3761732 A US3761732 A US 3761732A US 3761732D A US3761732D A US 3761732DA US 3761732 A US3761732 A US 3761732A
Authority
US
United States
Prior art keywords
sonic
energy
output
switching
timing pulse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Other languages
English (en)
Inventor
H Ratcliff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SWEN SONICS Corp A CORP OF IA
Original Assignee
Bendix Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bendix Corp filed Critical Bendix Corp
Application granted granted Critical
Publication of US3761732A publication Critical patent/US3761732A/en
Assigned to SWEN SONICS CORPORATION, A CORP. OF IA. reassignment SWEN SONICS CORPORATION, A CORP. OF IA. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BENDIX CORPORATION THE
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/0207—Driving circuits
    • B06B1/0223—Driving circuits for generating signals continuous in time
    • B06B1/023—Driving circuits for generating signals continuous in time and stepped in amplitude, e.g. square wave, 2-level signal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
    • B06B2201/20—Application to multi-element transducer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
    • B06B2201/70—Specific application
    • B06B2201/71—Cleaning in a tank

Definitions

  • ABSTRACT The output of a single sonic generator is rotated to different transducers separately located on a diaphragm of a tank containing cleaning fluid.
  • the rotating of the output to different transducers establishes a ripple action in the cleaning fluid to vary energy levels at any given location within the tank.
  • the varying energy levels allows the gas formed within the fluid to rise to the top of the cleaning fluid in a process called degassing.
  • Rotation of the output may be accomp lished by interrupting the output of the sonic generator and, while the output is interrupted, to switch the connection to another transducer.
  • the switching of the output of the sonic generator from transducer to transducer varies the standing wave pattern, thereby allowingthe gas to rise to the surface.
  • the interrupting of the sonic output and the switching action are accomplished by specially designed solid state circuits to obtain optimum performance.
  • standing wave patterns tend to set up in the cleaning fluid.
  • the standing wave pattern tends to create a resident frequency within a cleaning vat. Because of the standing wave patterns, many of the air bubbles are trapped in the cleaning fluid. The process of eliminating the air bubbles from the cleaning fluid is known as degassing.
  • the switchingon and off of the sonic generator helps increase the cleaning ability of the fluid, but an even better cleaning performance can be obtained with the present invention that uses a ripple operation.
  • the ripple operation can be accomplished by varying the energy wave patterns within the tank. This is done by switching the output of the sonic generator to sonic transducers connected at various places around the diaphragm of the tank as is accomplished in the present invention. Leading up to the present invention several sonic generators were used to connect to different loads. By having only one sonic generator on and, therefore, only one transducer vibrating the diaphragm, energy levels are different throughout the cleaning fluid within the vat. If the first sonic generator is turned ofl and another sonic generator is turned on,
  • the energy level changes throughout the cleaning fluid.
  • the energy level continues to vary as other transducers are energized in a predetermined order.
  • different sized bubbles are formed.
  • the bubbles rise to the surface with a different sized bubble being formed.
  • an almost continual change of energy levels can be obtained. Therefore, the bubbles continually rise to the surface and essentially no cleaning time is lost.
  • to use a separate sonic generator for each transducer can be very expensive. Thisinvention, while incorporating the above principles, is much more economical to build and use.
  • FIG. 1 is a block diagram of a rotating sonic energy wave apparatus.
  • FIG. 2 is a partial schematic diagram of a portion of the rotating sonic energy wave apparatus shown in FIG. 1.
  • FIG. 3 is a schematic diagram of a portion of the rotating sonic energy wave apparatus shown in FIG. 1.
  • FIG. 4 is a voltage timing chart for the rotating sonic energy wave apparatus shown in FIGS. 1-3.
  • FIG. ll there is shown a block diagram of one method for rotating the output of a single sonic generator to various sonic transducers. Since some type of timing mechanism is needed, a pulse generator is used to control any switching operation.
  • the output of the pulse generator 14, which is in the form of a sharp, spiked voltage, is converted to a more suitable wave form in shaper 12.
  • shaper l2 Upon receiving the pulse from the pulse generator 10, shaper l2 interrupts the normal operation of sonic generator 14 by turning the generator 14 off through the generator shutdown circuit 116.
  • timing pulses can be used and the sonic generator 14can be shut down or interrupted for varying periods of time
  • the present invention will use a timing pulse from the pulse generator every one second.
  • the shutdown time of the sonic'generator 14 will be 0.2 second.-This is purely for the purpose of explanation and will be explained in more detail subse- I rupted. Therefore, any voltage resulting from the pulse generator 10 will be received in the delay circuit 20, and-after a delay for a slight period of time, the delay circuit 20 will give an output.
  • the output from the delay circuit 20 feeds into the counter22.
  • the counter 22 Upon receiving the output from the'delay circuit 20, the counter 22 de-energizes one of the shapers and energizes another shaper. For the purposes of explanaition, let us assume that the shaper 24 was energized and the shapers 26, 28
  • each one of the shapers 24, 26, 28 and 30 energizes its own appropriate relay switch with the shaper 24 energizing the reed relay 32, shaper 26 energizing the reed relay 34, shaper 28 energizing the reed relay 36, and shaper30 energizing the reed relay 38. Because the output of the sonic generator 14 is fed to each one of the reed relays 32, 34, 36 and 38 whichever relay is energized wil result in the transducer connected thereto being energized.
  • reed relay 32 When the shaper 24 was receiving voltage from counter 22, reed relay 32 was energized with the output from the sonic generator 14 feeding through the reed relay 32 to the transducer 40. After receiving the pulse from the delay circuit 20, the counter 22 interrupts shaper 24, thereby de-energizing reed relay 32. The sonic generator 14 is no longer connected to the transducer 40. As the counter 22 gives a voltage output to the shaper 26, reed relay 34 is energized, thereby allowing the output from the sonic generator 14 to'feed through reed relay 34 to the transducer 42. It should be understood that the switching of the reed relays 32, 34,
  • the delay circuit 20 will give another output to counter 22. This time the output to the shaper 26 is terminated and an output is given to the shaper 28. Therefore, the reed relay 34 is de-energized and the reed relay 36 is energized. When the sonic generator 14 is turned back on by the generator shutdown circuit 16, the sonic output will feed through the reed relay 36 to the transducer 44.
  • the delay circuit 20 Upon receiving still another pulse from the pulse generator 10, the delay circuit 20 will again feed a pulse into counter 22. This will terminate the output to the shaper 28 and cause an output to the shaper 30, which energizes the reed relay 38, with the reed relay 36 being deenergized. Therefore, when the sonic generator 14 is turned back on through the generator shutdown circuit 16, the output of the sonic generator 14 will feed through the reed relay 38 into the transducer 46.
  • the present invention only shows four transducers, shapers and reed relays, any number of transducers and reed relays could be used with an appropriate counter circuit. Therefore, the output of the sonic generator 14 could be rotated through any number of sonic transducers. Predominantly, this invention was devised for a cleaning operation where the transducers would be attached to the diaphragm of a cleaning vat. With the transducers 40, 42,44 and 46 being appropriately spaced apart on the diaphragm of a cleaning vat, the cleaning fluid contained within the vat could be vibrated at a high frequency sonic energy. The purpose of switching the output of the sonic generator 14 to different transducers is to vary the energy level within the cleaning fluid.
  • the energy level is the greatest immediately adjacent to the transducer that is energized, with the energy level decreasing the farther away from the transducer that is being energized.
  • This invention was designed for use with a cleaning fluid and a diaphragm with which to vibrate the cleaning fluid in a vat. Still,'it should be understood that the present invention could be used with any type of medium that needs varying amounts of sonic energy applied to that medium.
  • the voltage used throughout the present system will be a +V
  • +V is fed into the pulse generator 10.
  • a zenor diode 48 is connected between +V,, and resistor 50, which is connected to ground.
  • the resistor 50 supplies a base voltage for a transistor 52.
  • the emitter of transistor 52 is connected through resistors 54 and 56 to +V,,,,, with resistor 56 being variable.
  • transistor 52 Upon receiving +V, by the pulse generator 10, transistor 52 immediately begins to conduct because the base of transistor 52 is at a lower voltage than the emitter of transistor 52.
  • capacitor 58 begins to charge and form a ramp voltage. As capacitor 58 begins to charge up into a ramp voltage, it will reach a certain value, then unijunction transistor 60 will begin to conduct and discharge capacitor 58 through a low valued resistor 62. The other side of the unijunction transistor 60 is connected to +V through resistor 64. The discharge time of capacitor 58 is very small when compared to the charge time. Therefore, the output of transistor 52 will appear as a sawtooth wave form.
  • the unijunction transistor 60 which in many ways resembles the field effect transistor, differs from this particular type of device in that it has only one pn junction. It also differs from the field effect transistor because in normal operation the junction is forward biased.
  • the timing of the pulse generator is controlled by the variable resistor 56. By varying the value of resistor 56, the charge time of capacitor 58, which controls the firing of unijunction transistor 60, may be directly varied. 1
  • the output voltage from the pulse generator is developed across resistor 62, which is shown as waveform A in FIG. 4.
  • This output voltage is a spike voltage that occurs approximately once every second and has a negative going portion that results from the discharge of capacitor 58.
  • the letter A in FIG. 2 represents the point where the output voltage shown in waveform A of HO. 4 is measured.
  • This output voltage A from the pulse generator 10 is fed into the shaper 12 through diode 66 into transistor 68.
  • the negative portion of the output from pulse generator 10 is fed through resistor 70 to ground with the diode 66 allowing only the positive portion to be developed across resistor 72 at the base of transistor 68.
  • the collector of transistor 68 is connected to +V through resistor 74.
  • transistor 68 when the base of transistor 68 goes positive with respect to the emitter by receiving a :positive voltage through diode 66, transistor 68 willstart to conduct. When'transistor 68 begins to conduct, the collector of transistor 68 reaches essentially a ground potential. Any voltage that is developed at the collector of transistor 68 is fed through resistor 76 into transistor 78. Therefore, when transistor 68 is conducting, transistor 78 will not be conducting because the base of transistor 78 will be at the same potential as the emitter of transistor 78. When transistor 78 is not conducting, essentially all of the voltage'from +V through resistor 80 will be developed at the collector of transistor 78. The voltage at the collector of transistor 78 can be seen as waveform B in FIG. 4. The ON time of waveform B in FIG.
  • the output of transistor 78 is fed through resistor 88 into transistor 90 with the collector of transistor 90 being connected through resistor 92 to +V
  • the output of transistor 90 is the inverse of the voltage fed through resistor 88.
  • the collector of transistor 96 is connected through resistor 98 to +V
  • waveform B is fed through resistor 100 into the base of transistor 102.
  • the output of transistor 102 as measured at the collector of transistor 102, is inverted with respect to the input.
  • the collector of transistor 102 is connected through resistor 104 to +V A second inversion occurs when the output of transistor 102 is fed through resistor 106 into the base of transistor 108.
  • the collector of transistor 108 is connected to +V through resistor 110.
  • a double inversion of the input waveform B has taken place at the collector of transistor 108.
  • the collector of transistor 108 is then connected to output transistor 112. This again inverts the input signal.
  • the various stages are necessary in the generator shutdown circuit to provide the drive needed in the output stage. Therefore, when waveform B goes positive, the output of transistor 112 goes to zero, meaning that transistor 112 has connected the input of the sonic generator 14 to ground. When the input for the sonic generator 14 is connected to ground, this terminates any output possible from the sonic generator. This is the same as cutting-off the sonic generator or interrupting the output of the sonic generator.
  • this device can be used with any type of system that needs a high frequency mechanical energy that can be varied throughout a medium.
  • waveform C from transistor 96 is fed into the delay circuit 20 through resistor 114.
  • capacitor 116 Upon initially receiving waveform C and any positive voltage therefrom, capacitor 116 must be charged before diode 118 will feed the voltage to the base of transistor 120. The charging of this capacitor 116 provides the delay inherent in delay circuit 20.
  • Resistor 122 provides a discharge path for capacitor 116 when no more voltage is being received through resistor 114.
  • transistor After the receiving of the voltage from waveform C and the charging of capacitor 116, which takes about 411 milliseconds, transistor will start to conduct with current flowing from +V through resistor 124 to ground. While transistor 120 is conducting, the ground potential is fed through resistor 126 into the base of transistor 128.
  • Transistor 128 provides a second inversion from the input waveform C.
  • a positive voltage will also be at the collector of transistor 128 after capacitor 116 is charged. This will mean that essentially no current is flowing through resistor 130 because transistor 128 is nonconducting.
  • the output of transistor 128 is again fed through resistor 132 into the base of transistor 134.
  • the output from transistor 134 is measured between a voltage divider network consisting of resistors 136 and 138. This output, which is waveform D in FIG. 4, always remains positive.
  • transistor 134 is conducting, the output drops to a lower voltage. However, when transistor 134 is not conducting, the output remains at approximately the same voltage as waveform C or +V Referring more closely to FIG.
  • Counter 22 is formed by two astable flip-flops being connected together. Not claiming anything to be new in the counter circuit 22, it will be very briefly described. Upon receiving waveform D through capacitors 140, 142, 144 and- 146 into stages 148, 150, 152 and 154, respectively, one of these stages will energize before the others. Even though all of the stages are designed the same, there will be some minute difference that will cause one stage to energize before the other three stages will energize. Diodes 156, 158, 160 and 162 connect the input signal into the base of transistors 164, 166, 168 and 170, respectively.
  • each side of the diodes 156, 158, 160, and 162 are connected through identical resistor arrangements to +V Assuming now that it was stage 148 that energized first, the subsequent action will be described as follows: When the first negative going pulse is received by the counter 22, stage 148 stops conducting, thereby giving a positive voltage at the No. 1 terminal, which is shown in FIG. 4 as counter waveform No. I. This waveform will stay positive until a third pulse is received from delay circuit 20. Simultaneously, with counter output No. 1 going positive, counter output terminal No. 3 goes negative, which.
  • Resistor 182 connects the collector of transistor 178 to +V
  • the output from transistor 178 is fed through resistor 184 and transistor 186 to provide a double inversion of the waveform D.
  • the collector of transistor 186 is connected to +V through resistor 188.
  • the output of transistor 186 is used to drive the output transistor 189, which controls the coil of the reed relay 38. Therefore, as long as transistor 189 is conducting, the reed relay 38 will be-closed since the coil 190 is energized. The length of time that the reed relay 38 is closed and the coil 190 is energized is determined by a feedback loop connected to the base of transistor189.
  • the feedback network consists of a diode 192, resistor 194, and capacitor 196 in series connection from the base of transistor 189 to the base of transistor 178. Also, +V,, is connected to the feedback network through resistor 198.
  • the charging of capacitor 196 in the feedback network determines the length of time transistor 186 is cut off and transistor 178 conducts, thus allowing transistor 189 to conduct and energize coil 190.
  • capacitor 196 Once capacitor 196 has reached a predetermined value, the state of each one of the transistors 178, 186, and 189 in the shaper 30 will change. By proper adjustment of capacitor 196, the transistors will change state during the second following pulse from the delay circuit 20 to the counter 22.
  • the shapers 24, 26 and 28 operate in the same manner as the shaper 30. When a particular reed relay is energized, its contacts will be closed, thereby allowing the output of the sonic generator 14, when it is no longer interrupted, to feed through that particular reed relay into the connected transducer.
  • a pulse is generated by the pulse generator 10.
  • the output from shaper 12 is fed into the generator shutdown circuit 16, which grounds out the input of sonic generator 14.
  • the output from the shaper 12 is fed through a buffer circuit 18,
  • the delay circuit 20 which is delayed approximately 40 milliseconds, is fed into counter 22.
  • the counter 22 On the first pulse from the pulse generator 10 the counter 22 energizes one of the shapers, either 24, 26, 28 or 30. Whichever shaper is energized, the appropriate reed relay 32, 34, 36 or 38, respectively, will be energized. By energizing the coil of the reed relay, the contacts are closed and the appropriate transducer 40, 42, 44 or 46 can receive the output from the sonic generator 14 as soon as the ground is removed from the input.
  • the electronics in the'present system are capable of being manufactured as integrated circuits.
  • a customary type of use for the present invention would be to connect the transducers 40, 42, 44, and 46 to the diaphragm of a tank, thereby vibrating the cleaning fluid within the tank as previously described. Assume the tank was 36 inches by 50 inches with four 18 inch by 25 inch diaphragms forming the bottom of the tank. By using the present method, each diaphragm would be individually vibrated in a predetermined mode. Since the energy level within the cleaning fluid is determined by how close it is to the vibrator that is being energized, by varying the point of energization of the cleaning fluid, the energy level throughout the cleaning fluid allows gas bubbles that have been developed in the fluid to rise to the top. Also, the present invention could be used in any other type of system that needs to vary the level of the high frequency mechanical energy being delivered at different points of a substance. It does not necessarily have to be limited to sonic cleaning.
  • a rotating sonic energy apparatus for varying energy wave patterns, said apparatus comprising:
  • the rotating sonic energy appartus of claim 1 further comprising'a means for delaying response by said switching means to said timing pulse, delay in the response to said timing pulse allowing said sonic energy source to be completely interrupted by said interrupting means before changing loads by said switching means, all switching means being completed in said short time interval.
  • counting means for energizing saidrelay means to allowcyclic operation of said load in response to said timing pulse.
  • the rotating sonic energy apparatus as recited in claim 2, further comprising a shaping means for changing said timing pulse into a voltage of a predetermined duration and value.
  • a device for varying energy levels within a medium comprising:
  • the device for varying energy levels as recited in claim 8, further comprising a timing means for generating said timing pulse, said timing pulse controlling said switching means.
  • said switching means includes a means for delaying said timing pulse so that said generating means is not switched until said shutdown means has shut down said generating means.
  • switching means further includes relay means and control counter means for switching said generating means.
  • the device for varying energy levels as recited in claim 11, wherein said energy levels are in the sonic range and converting means are sonic transducers that create mechanical energy in said medium.
  • timing means is a pulse generator.
  • the device for varying energy levels as recited in claim 13, further comprising means for shaping electrical signals from said pulse generator and said control counter means, said shaping means changing said electrical signals to usable energy levels.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Electronic Switches (AREA)
  • Cleaning By Liquid Or Steam (AREA)
US3761732D 1972-09-15 1972-09-15 Rotating sonic energy wave Expired - Lifetime US3761732A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28950072A 1972-09-15 1972-09-15

Publications (1)

Publication Number Publication Date
US3761732A true US3761732A (en) 1973-09-25

Family

ID=23111805

Family Applications (1)

Application Number Title Priority Date Filing Date
US3761732D Expired - Lifetime US3761732A (en) 1972-09-15 1972-09-15 Rotating sonic energy wave

Country Status (4)

Country Link
US (1) US3761732A (en])
JP (1) JPS4966328A (en])
DE (1) DE2336808A1 (en])
GB (1) GB1406949A (en])

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4339247A (en) * 1981-04-27 1982-07-13 Battelle Development Corporation Acoustic degasification of pressurized liquids
US4398925A (en) * 1982-01-21 1983-08-16 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Acoustic bubble removal method
US4433916A (en) 1982-11-02 1984-02-28 Hall Mark N Acoustic resonator having transducer pairs excited with phase-displaced energy
US6106590A (en) * 1997-06-17 2000-08-22 Konica Corporation Method of ultrasonic waves degassing and device using the same
WO2004024317A1 (es) * 2002-09-13 2004-03-25 Consejo Superior De Investigaciones Científicas Sistema ultrasónico de desespumación mediante emisores con placa vibrante escalonada
US20090257317A1 (en) * 2005-07-27 2009-10-15 Juan Antonio Gallego Juarez Macrosonic Generator for the Air-Based Industrial Defoaming of Liquids

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0434950Y2 (en]) * 1985-07-20 1992-08-19
DE4013607A1 (de) * 1990-04-27 1991-10-31 Elektrotechnik Horst Kahl Kg Verfahren und einrichtung zur steuerung und regelung von ultraschall-piezosystemen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429743A (en) * 1966-11-17 1969-02-25 Branson Instr Shock wave treatment method and apparatus
US3608272A (en) * 1968-12-16 1971-09-28 Leonard J Di Peri Gas from liquid separation method and apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429743A (en) * 1966-11-17 1969-02-25 Branson Instr Shock wave treatment method and apparatus
US3608272A (en) * 1968-12-16 1971-09-28 Leonard J Di Peri Gas from liquid separation method and apparatus

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4339247A (en) * 1981-04-27 1982-07-13 Battelle Development Corporation Acoustic degasification of pressurized liquids
WO1982003795A1 (en) * 1981-04-27 1982-11-11 Development Corp Battelle Acoustic degasification of pressurized liquids
JPS58500601A (ja) * 1981-04-27 1983-04-21 バツテル・デイベロプメント・コ−ポレ−シヨン 加圧された流体の音響脱気方法
US4398925A (en) * 1982-01-21 1983-08-16 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Acoustic bubble removal method
US4433916A (en) 1982-11-02 1984-02-28 Hall Mark N Acoustic resonator having transducer pairs excited with phase-displaced energy
US6106590A (en) * 1997-06-17 2000-08-22 Konica Corporation Method of ultrasonic waves degassing and device using the same
WO2004024317A1 (es) * 2002-09-13 2004-03-25 Consejo Superior De Investigaciones Científicas Sistema ultrasónico de desespumación mediante emisores con placa vibrante escalonada
ES2212896A1 (es) * 2002-09-13 2004-08-01 Consejo Sup. Invest. Cientificas Procedimiento y sistema ultrasonico de desespumacion mediante emisorescon placa vibrante escalonada.
ES2212896B1 (es) * 2002-09-13 2005-10-01 Consejo Sup. Invest. Cientificas Procedimiento y sistema ultrasonico de desespumacion mediante emisorescon placa vibrante escalonada.
US20090257317A1 (en) * 2005-07-27 2009-10-15 Juan Antonio Gallego Juarez Macrosonic Generator for the Air-Based Industrial Defoaming of Liquids
US7719924B2 (en) 2005-07-27 2010-05-18 Juan Antonio Gallego Juarez Macrosonic generator for the air-based industrial defoaming of liquids

Also Published As

Publication number Publication date
GB1406949A (en) 1975-09-17
DE2336808A1 (de) 1974-03-21
JPS4966328A (en]) 1974-06-27

Similar Documents

Publication Publication Date Title
US3432691A (en) Oscillatory circuit for electro-acoustic converter
US3638087A (en) Gated power supply for sonic cleaners
US3761732A (en) Rotating sonic energy wave
US3916138A (en) Apparatus for machining through varying-frequency constant-duration pulse-controlled electric discharges
US3064175A (en) Transistorized variable speed motor control
GB1475101A (en) Method of and apparatus for producing a subnanosecond pulse
US3065362A (en) Single shot multivibrator using seriesresonant cross-coupling for resetting fixed time interval after triggering
US3388346A (en) Semiconductor multivibrator pulse train generating circuit
US3114098A (en) Self-regulating direct current power supply
US3192462A (en) Scr fed motor control system
US3387257A (en) Pulse circuit for pulse echo ultrasonic testing
KR100450537B1 (ko) 부품공급기 및 그 제어방법
US3013159A (en) Signal responsive pulse producing apparatus
US3435298A (en) Condition responsive circuit
US3500089A (en) Ultrasonic cleaning apparatus
US3155921A (en) Square wave pulse generator having good frequency stability
US2547523A (en) Electronic pulse generator
US3282086A (en) Ultrasonic pulse testing apparatus
US3694672A (en) Timing circuit with multiple time constants and switching means to connect and disconnect said time constants selectively
US3487237A (en) Electrical generator for energizing a source of ultrasonic energy
US3443182A (en) System for operating alternating current induction type motors from a direct current potential source
US2157799A (en) Tuning fork driving means
US3192401A (en) Transistor pulse generating circuit of alternately opposite polarities
JPS6141338Y2 (en])
US2285434A (en) Apparatus for operating vibratory conveyers or motors

Legal Events

Date Code Title Description
AS Assignment

Owner name: SWEN SONICS CORPORATION, 1704 WEST 2ND ST., DAVENP

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BENDIX CORPORATION THE;REEL/FRAME:003912/0050

Effective date: 19810903