US3563229A - Cardiac sound simulator - Google Patents

Cardiac sound simulator Download PDF

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Publication number
US3563229A
US3563229A US678107A US3563229DA US3563229A US 3563229 A US3563229 A US 3563229A US 678107 A US678107 A US 678107A US 3563229D A US3563229D A US 3563229DA US 3563229 A US3563229 A US 3563229A
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United States
Prior art keywords
pulses
pulse
univibrator
time
pair
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Expired - Lifetime
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US678107A
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English (en)
Inventor
Erling Olav Valdemar Petrusson
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H3/00—Dolls
    • A63H3/001—Dolls simulating physiological processes, e.g. heartbeat, breathing or fever
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
    • A61B5/319—Circuits for simulating ECG signals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H3/00—Dolls
    • A63H3/003—Dolls specially adapted for a particular function not connected with dolls
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/282—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable
    • H03K3/2823—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable using two active transistor of the same conductivity type
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
    • A61M2021/0005—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus
    • A61M2021/0027—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus by the hearing sense
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
    • A61M2021/0005—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus
    • A61M2021/0061—Simulated heartbeat pulsed or modulated

Definitions

  • the simulator comprises a pulse generator which generates pulses in pairs. The time between the pulses in each pair being less than the time between pairs and the two pulses of a pair having different time durations. The pulses are fed to a loudspeaker which converts the pulses to a sound having the rhythm of a heartbeat.
  • the present invention relates to a toy in which is built in a double pulse generator for producing cardiac sounds (heart sounds).
  • An object of the invention is to provide an arrangement that can be used for purely medical purposes and'for making toys more lifelike whereby a toy provided'with the arrangement can be used for medical purposes.
  • FIG. 1 is a block diagram of a sound generator
  • FIG. 2a is a circuit diagram of such a generator
  • FIG. 2b is a diagram of the voltages V V as a function of time and said generatonand
  • FIG. 3 shows the generator mounted in a doll.
  • the cardiac sound simulator consists of a double-pulse generator which runs a miniature load speaker, and is intended to be mounted in dolls, animals and similar toys.
  • a simulator according to the present invention By mounting a simulator according to the present invention in the toy animal or in the doll that the child is in the habit of having in bed, the result can be achieved that a child having difiiculty in relaxing will listen to the regularly beating heart of the doll and thanks to that it will be appeased and falls asleep.
  • the simulator Besides that the simulator possesses certain soothing properties, it gives also the toy in which it is mounted an illusion of life, which in its turn makes the toy in question more attractive.
  • the frequency spectrum can be varied because the duration of the two pulses and the duration of the intermediate spaces can be varied within wide limits. These periods are determined by time constants (RC) in the generator. Thanks to the design of the transistor the wear and tearis small and the consumption of current will be low.
  • RC time constants
  • the block diagram of FIG. 1 shows the principle of the construction.
  • the voltage unit is composed of a flashlight battery.
  • An oscillator consisting of an astable multivibrator delivers 2 pulses per period.
  • the pulses start with a transient and are turned into an exponential function.
  • the pulses give sounds, substantially at the time of the transient.
  • the exponential function is long and would demand a very great etfective power if this should run the loud speaker.
  • the power that can be converted into sound, is small.
  • the pulse may therefore first pass to a pulse former of the univibrator type. For each transient appearing on one of the inputs of the univibrator, a short square pulse is delivered on the output.
  • the square pulses are amplified in an output stage of a Darlington circuit and pass through the sound control to the loud speaker where they are transfonned into sound.
  • FIG. 2a shows an example of a circuit diagram
  • FIG. 2b the waveforms of the voltages at four different points in the circuit.
  • the pulses from the astable multivibrator are selected on the bases of the transistors. They are reproduced in the diagrams V, f (t) and V f (t).
  • the periods T and T are determined by the time constants R C and R C respectively.
  • the negative transients trigger the univibrator.
  • the transistor current will be interrupted for a time (T or T determined by C ,C, and R During this time the collector voltage V;, will rise. This generates a positive pulse which passes to the Darlington circuit.
  • This circuit has a high input impedance and a low output impedance.
  • the voltage amplification is less than 1 (see V f (t), but because of the high current amplification the power amplification will also be high.
  • the potentiometer connected in series with the loud speaker serves as volume control.
  • the generator can be built very much simpler and in a smaller size but the price will then be higher.
  • a unijunction transistor can be used in the oscillator and a tunnel diode in the pulse formerl Integrated circuits can also be considered.
  • Button cells can replace the flashlight battery.
  • a crystal loud speaker is used instead of a loud speaker of the dynamic type, which is the case in the embodiment described above.
  • the loading effect can be decreased to approximately one-fiftieth in comparison with dynamic loud speakers.
  • a crystal loudspeaker has, however, a somewhat inferior sound quality, which in this case is of no importance.
  • the circuit In order to make it possible to use crystal loud speakers the circuit must be changed for example in the following manner: (See FIG. 2a).
  • the univibrator, the Darlington circuit and the dynamic loud speaker are omitted.
  • the crystal loud speaker is connected to the collectors of the transistors in the astable multivibrator.
  • the sound generator is built into a doll.
  • a voltage source 1 supplies voltage through a switch 2, enabling the generator 3 to be con nected or disconnected to the voltage source 1 (battery).
  • the sound pulses are produced in a loud speaker 4.
  • a toy comprising:
  • said sound generator comprising pulse generating means for periodically generating pairs of electrical! pulses, wherein the first occurring pulse of each pair has a shorter time dura tion than the second occurring pulse of said pair and the time between pulses of each pair being less than the time between adjacent pairs of pulses;
  • said pulse generating means comprising a free-running astable and asymmetrical multivibrator having first and second outputs wherein said first output transmits a first train of pulses having a given time duration and said second output transmits a second train of pulses, complementary to said first train of pulses, and having a time duration greater than said given time duration;
  • univibrator having first and second inputs connected to said first and second outputs, respectively, of said multivibrator for receiving said first and second trains of pulses simultaneously, said univibrator generating a pulse in response to each received pulse, the duration of each generated pulse being equal to the time between the leading edge of a received pulse and a particular point on the trailing edge of said received pulse;
  • transducer means receiving said electrical pulses for emitting sounds occurring at the leading and trailing edges of said pulses so that the sounds occurring in response to one pulse of the pair are heard as a sound with a first tone and the sounds occurring in response to the other pulse of the pair are heard as a sound with a second tone different from said first tone.
  • the pulses of said first and second trains of pulses have a sawtooth shape and the pulses generated by said univibrator have durations equal to the time between one of the edges of a received pulse and the time when the other edge of said received pulse has a given signal level so that the pulses generated by said univibrator in response to the received first train of pulses have a different time duration than the pulses generated by said univibrator in response to the received second train of pulses.
  • transducer means comprises an amplifier having a high input impedance and a low output impedance, a loudspeaker connected to the output of said amplifier and means for connecting the input of said amplifier to the output of said univibrator.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Cardiology (AREA)
  • Biophysics (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Psychology (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Pathology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Physiology (AREA)
  • Pulmonology (AREA)
  • Power Engineering (AREA)
  • Toys (AREA)
US678107A 1966-10-27 1967-10-25 Cardiac sound simulator Expired - Lifetime US3563229A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE14742/66A SE313518B (enrdf_load_stackoverflow) 1966-10-27 1966-10-27

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US3563229A true US3563229A (en) 1971-02-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
US678107A Expired - Lifetime US3563229A (en) 1966-10-27 1967-10-25 Cardiac sound simulator

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US (1) US3563229A (enrdf_load_stackoverflow)
DE (1) DE1603635A1 (enrdf_load_stackoverflow)
FR (1) FR1557709A (enrdf_load_stackoverflow)
SE (1) SE313518B (enrdf_load_stackoverflow)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888233A (en) * 1974-01-17 1975-06-10 Kamar Inc Figure with simulated heartbeat
US3994282A (en) * 1974-09-12 1976-11-30 Bioengineering Research Heart-beat electronic simulator
US4124022A (en) * 1977-01-14 1978-11-07 Sam Gross Heart novelty and relaxation device
US4249338A (en) * 1979-11-26 1981-02-10 Howard Wexler Doll with sound generator and plural switch means
US4257408A (en) * 1979-07-10 1981-03-24 Carol Ramey Cushioned structure and method of testing thereof
US4606328A (en) * 1983-06-16 1986-08-19 Thoman Evelyn B Method and apparatus for treating breathing irregularities
WO1987004934A1 (en) * 1986-02-21 1987-08-27 Sablequest Pty. Ltd. Sleep inducing device
WO1987006487A1 (en) * 1986-05-02 1987-11-05 Vladimir Sirota Toy
US4718876A (en) * 1985-10-07 1988-01-12 Lee Min J Child calming toy with rythmic stimulation
US4969867A (en) * 1987-08-14 1990-11-13 Pama Electronics Sleep-promoting and/or pacification apparatus
US5415579A (en) * 1991-04-24 1995-05-16 Concepts Development Australia Pty Ltd Doll with pivoting eyeballs, heart beat, voice means, burping sounds and actuating transmitter
US20040077287A1 (en) * 2002-08-19 2004-04-22 Odiwo Edith Lamira Infant nurturing medical device
US20080027694A1 (en) * 2006-07-12 2008-01-31 Yury Michael Gitman Heartbeat Simulation Method And Apparatus
US20090278475A1 (en) * 2008-05-08 2009-11-12 Michael Clow Heartbeat emulating lighted device
GB2586458A (en) * 2019-08-16 2021-02-24 Rawlinson Jasmine Tactile sensory device for use by a baby or child
US11213761B2 (en) * 2020-04-21 2022-01-04 Mary M. Lyell Comforting device
US11433316B1 (en) * 2021-03-02 2022-09-06 Encompass Pet Group, Llc Artificial heartbeat generator device with automatic control system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES475246A1 (es) * 1978-11-20 1979-04-16 Onil Fab Agrup De Munecas Sistemas electromecanico simulador de latidos de corazon.
FR2458290B1 (fr) * 1979-06-05 1988-05-27 Faure Georges Simulateur d'ambiance sonore destinee a calmer les nourrissons
EP0218182B1 (en) * 1985-10-07 1992-04-15 Min Joo Lee A child calming toy with rhythmic stimulation
WO1991013647A1 (en) * 1990-03-12 1991-09-19 Sleeptime International (Baby Products) Pty. Limited Sleep inducing device

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859731A (en) * 1957-06-05 1958-11-11 Sutton Vera Puppy comforter
US3024568A (en) * 1960-03-09 1962-03-13 Harry E Barnett Toy stethoscope with electronically simulated heartbeat
FR1302277A (fr) * 1960-10-05 1962-08-24 Securitone Corp Of America Appareil destiné à simuler le battement rythmique du coeur
US3137092A (en) * 1961-05-15 1964-06-16 J L Ross Mechanism for simulating sounds and vibrations of a heart beat
GB1030980A (en) * 1964-04-29 1966-05-25 Guy Caillebotte Improvements in or relating to toys
US3316491A (en) * 1962-08-08 1967-04-25 United Aircraft Corp Heartbeat waveform simulator
US3323068A (en) * 1963-01-21 1967-05-30 Gary J Woods Electrocardiogram simulator
US3384074A (en) * 1965-09-24 1968-05-21 Rautiola Acoustic sleep induction apparatus
US3469115A (en) * 1967-05-10 1969-09-23 Burdick Corp Cardiac waveform simulating apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859731A (en) * 1957-06-05 1958-11-11 Sutton Vera Puppy comforter
US3024568A (en) * 1960-03-09 1962-03-13 Harry E Barnett Toy stethoscope with electronically simulated heartbeat
FR1302277A (fr) * 1960-10-05 1962-08-24 Securitone Corp Of America Appareil destiné à simuler le battement rythmique du coeur
US3137092A (en) * 1961-05-15 1964-06-16 J L Ross Mechanism for simulating sounds and vibrations of a heart beat
US3316491A (en) * 1962-08-08 1967-04-25 United Aircraft Corp Heartbeat waveform simulator
US3323068A (en) * 1963-01-21 1967-05-30 Gary J Woods Electrocardiogram simulator
GB1030980A (en) * 1964-04-29 1966-05-25 Guy Caillebotte Improvements in or relating to toys
US3384074A (en) * 1965-09-24 1968-05-21 Rautiola Acoustic sleep induction apparatus
US3469115A (en) * 1967-05-10 1969-09-23 Burdick Corp Cardiac waveform simulating apparatus

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Fairchild publication - 1960 331-113 *
Garner - Popular Electronics, Vol 22, -2 Feb. 1965 pg. 78 331-113 *
Hoppe - EEE - Circuit Design Engr. Feb. 1967 pp 147-148 331-113 *

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888233A (en) * 1974-01-17 1975-06-10 Kamar Inc Figure with simulated heartbeat
US3994282A (en) * 1974-09-12 1976-11-30 Bioengineering Research Heart-beat electronic simulator
US4124022A (en) * 1977-01-14 1978-11-07 Sam Gross Heart novelty and relaxation device
US4257408A (en) * 1979-07-10 1981-03-24 Carol Ramey Cushioned structure and method of testing thereof
US4249338A (en) * 1979-11-26 1981-02-10 Howard Wexler Doll with sound generator and plural switch means
US4606328A (en) * 1983-06-16 1986-08-19 Thoman Evelyn B Method and apparatus for treating breathing irregularities
US4718876A (en) * 1985-10-07 1988-01-12 Lee Min J Child calming toy with rythmic stimulation
WO1987004934A1 (en) * 1986-02-21 1987-08-27 Sablequest Pty. Ltd. Sleep inducing device
WO1987006487A1 (en) * 1986-05-02 1987-11-05 Vladimir Sirota Toy
US4969867A (en) * 1987-08-14 1990-11-13 Pama Electronics Sleep-promoting and/or pacification apparatus
US5415579A (en) * 1991-04-24 1995-05-16 Concepts Development Australia Pty Ltd Doll with pivoting eyeballs, heart beat, voice means, burping sounds and actuating transmitter
US20040077287A1 (en) * 2002-08-19 2004-04-22 Odiwo Edith Lamira Infant nurturing medical device
US6918770B2 (en) 2002-08-19 2005-07-19 Brightwave Enterprises, Llc Infant nurturing medical device
US20080027694A1 (en) * 2006-07-12 2008-01-31 Yury Michael Gitman Heartbeat Simulation Method And Apparatus
US20090278475A1 (en) * 2008-05-08 2009-11-12 Michael Clow Heartbeat emulating lighted device
GB2586458A (en) * 2019-08-16 2021-02-24 Rawlinson Jasmine Tactile sensory device for use by a baby or child
GB2586458B (en) * 2019-08-16 2023-09-27 Rawlinson Jasmine Tactile sensory device for use by a baby or child
US12350239B2 (en) 2019-08-16 2025-07-08 Jasmine Rawlinson Tactile sensory device for use by a baby or child
US11213761B2 (en) * 2020-04-21 2022-01-04 Mary M. Lyell Comforting device
US11433316B1 (en) * 2021-03-02 2022-09-06 Encompass Pet Group, Llc Artificial heartbeat generator device with automatic control system

Also Published As

Publication number Publication date
SE313518B (enrdf_load_stackoverflow) 1969-08-11
FR1557709A (enrdf_load_stackoverflow) 1969-01-13
DE1603635A1 (de) 1971-08-05

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