US3868954A - Hemadynamometer microphone - Google Patents

Hemadynamometer microphone Download PDF

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Publication number
US3868954A
US3868954A US367117A US36711773A US3868954A US 3868954 A US3868954 A US 3868954A US 367117 A US367117 A US 367117A US 36711773 A US36711773 A US 36711773A US 3868954 A US3868954 A US 3868954A
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United States
Prior art keywords
support member
ceramic element
microphone
hemadynamometer
housing
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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
US367117A
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English (en)
Inventor
Kazuo Ueda
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UEDA WORKS CO Ltd
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UEDA WORKS CO Ltd
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Filing date
Publication date
Application filed by UEDA WORKS CO Ltd filed Critical UEDA WORKS CO Ltd
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Publication of US3868954A publication Critical patent/US3868954A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B7/00—Instruments for auscultation
    • A61B7/02—Stethoscopes
    • A61B7/04—Electric stethoscopes

Definitions

  • ABSTRACT A hemadynamometer microphone comprising a microphone cap, an elastic support member with the outer periphery thereof snugly fitted in the inner periphery of said microphone cap, a ceramic element having opposite ends supported on said support member via support base means, and a oscillating diaphragm mounted on the microphone cap and connected to said ceramic element via an elastic relay member/located at the center of said ceramic element.
  • the prior-art hemadynamometer microphone has a construction as shown in FIG. 1, consisting of a microphone cap 100, an oscillating diaphragm 102 and a crystal element 103, these parts being set as illustrated.
  • This construction of the prior-art hemadynamometer microphone has some drawbacks.
  • the crystal element 103 which serves to convert sound into electrical oscillation is poorly heat-resistant. Its normal function is impaired even by a human body temperature of about 40C imparted during the use of the hemadynamometer, thus adversely affecting the precision of the hemadynamometer.
  • the crystal element is supported at its opposite ends on separate support means, which adds to the number of component parts. Further, with this construction the positioning of the support means itself is very difficult, in addition to extreme difficulty encountered in positioning the crystal element and relay member in the central position, constituting the utmost drawback in the assembly.
  • a first object of the present invention is to provide a structure having improved physical resistance against heat and shocks.
  • a second object of the invention is to provide a structure, which readily and quickly permits the positioning of the ceramic element support member in the central position within the microphone cap, thus reducing the positioning failure and bettering the yield.
  • a third object of the invention is to provide a structure, which has a support consisting of a single part to minimize the number of parts within the microphone cap, thus saving the material, ensuring reliable assemblage and reducing the cost.
  • a fourth object of the invention is to provide a unique structure using a converting element made of a ceramic material, which is very immune to changes of the human body temperature and is capable of improving the pressure sensitivity to respond to diaphragm oscillations so that it can be utilized as the converting element sensitive to minute oscillations in a hemadynamometer.
  • a fifth object of the invention is to overcome the fragile character of the ceramic material that has heretofore constituted the main difficulty encountered when it is to be used as pressure sensor in the hemadynamometer by the provision of a unique support structure, which comprises an elastic relay member 4 made of such material as rubber and Neoprene rubber and a support member 5 of a single part made of rubber or a sponge-like material having a suitable rigidity or Neoprene rubber with hardness of 50, the converting element consisting of a ceramic material being supported on said support member, so that external shocks exerted to the ceramic material can be sufficiently absorbed.
  • a sixth object of the invention is to provide a structure, where the oscillating diaphragm 2 is formed with edge portion 2a to facilitate the mouting thereof on the microphone cap 1 and prevent strain from being developed in the microphone with the cap edge portion to thereby enhance the strength of the microphone.
  • a seventh object of the invention is to provide a structure, where the elastic support member 5 has a configuration capable of being snugly fitted in the inner periphery of the microphone cap so that the positioning of the support member 5 can be achieved simultaneously with the mounting thereof in the cap.
  • An eighth object of the invention is to provide a structure, which can be readily assembled without requiring any particular skill and ensures reliable positioning so that it permits efficiently manufacturing products of uniform quality and with high precision.
  • FIG. 1 is a sectional view showing a conventional microphone for use with a hemadynamometer
  • FIG. 2 is a front sectional view showing a dynamometer microphone according to the present invention in a complete state
  • FIG. 3 is an exploded view partly in section showing the individual component parts of the microphone according to the invention.
  • FIGS. 4 and 5 show other examples of the mounting of ceramic element on elastic support member.
  • reference numeral 1 designates a microphone cap or house.
  • Reference numeral 2 designates an oscillating diaphragm mounted on the microphone cap with its flange 2a in contact with the outer periphery of the cap.
  • the flange 2a ofthe oscillating diaphragm 2 is provided to reinforce the mechanical strength of the diaphragm and it serves to prevent excessive strain in the cap 1 to expect the perfection of the mounting of the oscillating diaphragm 2 on the microphone cap 1.
  • Reference 3 designates a ceramic element utilized as a converting element to convert sound into electric oscillation.
  • the ceramic element 3 can be readily positioned in the center of the cap 1 to greatly simplify the assemblage. Also, since the support member 5 consists of but a single part rather than two parts as in the prior art, the number of parts can be reduced, so that the assembly can further be facilitated while en'- suring the reliable positioning. Support member 5 is formed with support grooves 5a for supporting the opposite ends of the ceramic element 3 and also a central bore 5b utilized to visually facilitate the correct mounting of the relay member 4 in the central position.
  • the elastic support member 5 is characterized by its configuration: It consists of centrally recessed elongate body 3 comprising a pair of upwardly and inwardly opening grooves a, 5a longitudinally and symmetrically formed near the ends thereof, so that the ceramic element 3 may easily be supported on the support member 5 with its opposite ends fitted in the grooves and its major central portion spaced from the support member 5.
  • Numeral 6 designates a microphone cord electrically connected to the ceramic element 3.
  • a typical example of the assemblage consists of mounting the elastic support member 5 in the microphone cap 1, mounting the ceramic element 3 in the support member 5, soldering the element 3 to the microphone cord 6, bonding the relay element 4 to the ceramic element 3 and mounting the oscillating diaphragm 2 on the microphone cap 1 with the diaphragm bonded to the microphone cap 1 and to the relay member 4 in the mentioned order.
  • FIG. 4 shows another example, in which ceramic element 3 is bonded to elastic support member 5 by means of adhesive.
  • FIG. 5 shows a further example, in which ceramic element support member 5 of elastic material is formed with a longitudinal elongate groove 5a, in which the element is wholly received. While the mounting means 'for mounting the elastic support member 5 with respect to the microphone cap 1 is obtained from the snug fit between microphone cap 1 and elastic support member 5, an adhesive may sometimes be also used. Since the elastic support member has a simple construction, it can be readily produced on the mass production scale. Also, it permits reliable and ready positioning, thus facilitating the assembly, and also it serves to protect the ceramic element 3.
  • a hemadynamometer microphone comprising:
  • a ceramic element positioned in and centrally of the housing, with the opposite ends thereof fitted in said first and second grooves and a substantially major central part thereof held in spaced relation from said support member, for serving to convert sounds into electrical oscillations;
  • a relay member made of an elastic material disposed centrally of the ceramic element, between and interconnecting said ceramic element and said diaphragm, for transmitting the oscillation of said diaphragm to said ceramic element.
  • the hemadynamometer according to claim 1 further comprising an upwardly opening bore formed on the elastic support member centrally thereof, the size of the bore being of such extent as to visually facilitate the correct mounting of said relay member centrally between said ceramic element and said oscillating diaphragm.

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • General Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Engineering & Computer Science (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
US367117A 1973-02-10 1973-06-05 Hemadynamometer microphone Expired - Lifetime US3868954A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1973017769U JPS5410902Y2 (enExample) 1973-02-10 1973-02-10

Publications (1)

Publication Number Publication Date
US3868954A true US3868954A (en) 1975-03-04

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US367117A Expired - Lifetime US3868954A (en) 1973-02-10 1973-06-05 Hemadynamometer microphone

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US (1) US3868954A (enExample)
JP (1) JPS5410902Y2 (enExample)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983425A (en) * 1975-09-15 1976-09-28 The United States Of America As Represented By The Secretary Of The Navy Tuned plate acoustic projector with piezoelectric driver
US4012604A (en) * 1974-06-18 1977-03-15 Blasius Speidel Microphone for the transmission of body sounds
US4181122A (en) * 1975-08-01 1980-01-01 Ueda Works Co., Ltd. Device for measuring blood pressure
US4190871A (en) * 1975-06-13 1980-02-26 U.S. Philips Corporation Magnetic converter having a magnetoresistive element
US4356423A (en) * 1980-11-28 1982-10-26 Teledyne Industries, Inc., Geotech Division Pressure sensitive intrusion sensing line
US4409983A (en) * 1981-08-20 1983-10-18 Albert David E Pulse measuring device
US4591668A (en) * 1984-05-08 1986-05-27 Iwata Electric Co., Ltd. Vibration-detecting type microphone
US4783813A (en) * 1986-12-24 1988-11-08 Lola R. Thompson Electronic sound amplifier stethoscope with visual heart beat and blood flow indicator
US4784154A (en) * 1986-11-13 1988-11-15 Colin Electronics Co., Ltd. Interference resistant biomedical transducer
EP0472464A1 (en) * 1990-08-20 1992-02-26 Sony Corporation Pressure detecting apparatus
US5646470A (en) * 1994-04-01 1997-07-08 Benthos, Inc. Acoustic transducer
US5780958A (en) * 1995-11-03 1998-07-14 Aura Systems, Inc. Piezoelectric vibrating device
US6478744B2 (en) 1996-12-18 2002-11-12 Sonomedica, Llc Method of using an acoustic coupling for determining a physiologic signal
US10925573B2 (en) 2017-10-04 2021-02-23 Ausculsciences, Inc. Auscultatory sound-or-vibration sensor
US20230371917A1 (en) * 2020-10-06 2023-11-23 The George Washington University Auscultation wearable with mechanical amplifier and offset acoustic transducers

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS578318Y2 (enExample) * 1975-12-11 1982-02-17
JPS5827600Y2 (ja) * 1978-12-28 1983-06-15 日本特殊陶業株式会社 電気音響変換素子

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2001537A (en) * 1935-05-14 Stethoscope
US3182129A (en) * 1965-05-04 Clark etal electronic stethoscope
US3515239A (en) * 1968-07-16 1970-06-02 Minnesota Mining & Mfg Stethoscope head construction
US3555187A (en) * 1966-12-19 1971-01-12 Donald G Rowley Stethoscope
US3562451A (en) * 1968-06-11 1971-02-09 Us Navy Microphone and headset for underwater swimmer
US3682161A (en) * 1970-02-20 1972-08-08 Vernon F Alibert Heartbeat transducer for a monitoring device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2001537A (en) * 1935-05-14 Stethoscope
US3182129A (en) * 1965-05-04 Clark etal electronic stethoscope
US3555187A (en) * 1966-12-19 1971-01-12 Donald G Rowley Stethoscope
US3562451A (en) * 1968-06-11 1971-02-09 Us Navy Microphone and headset for underwater swimmer
US3515239A (en) * 1968-07-16 1970-06-02 Minnesota Mining & Mfg Stethoscope head construction
US3682161A (en) * 1970-02-20 1972-08-08 Vernon F Alibert Heartbeat transducer for a monitoring device

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4012604A (en) * 1974-06-18 1977-03-15 Blasius Speidel Microphone for the transmission of body sounds
US4190871A (en) * 1975-06-13 1980-02-26 U.S. Philips Corporation Magnetic converter having a magnetoresistive element
US4181122A (en) * 1975-08-01 1980-01-01 Ueda Works Co., Ltd. Device for measuring blood pressure
US3983425A (en) * 1975-09-15 1976-09-28 The United States Of America As Represented By The Secretary Of The Navy Tuned plate acoustic projector with piezoelectric driver
US4356423A (en) * 1980-11-28 1982-10-26 Teledyne Industries, Inc., Geotech Division Pressure sensitive intrusion sensing line
US4409983A (en) * 1981-08-20 1983-10-18 Albert David E Pulse measuring device
US4591668A (en) * 1984-05-08 1986-05-27 Iwata Electric Co., Ltd. Vibration-detecting type microphone
US4784154A (en) * 1986-11-13 1988-11-15 Colin Electronics Co., Ltd. Interference resistant biomedical transducer
US4783813A (en) * 1986-12-24 1988-11-08 Lola R. Thompson Electronic sound amplifier stethoscope with visual heart beat and blood flow indicator
EP0472464A1 (en) * 1990-08-20 1992-02-26 Sony Corporation Pressure detecting apparatus
US5249467A (en) * 1990-08-20 1993-10-05 Sony Corporation Pressure detecting apparatus
US5646470A (en) * 1994-04-01 1997-07-08 Benthos, Inc. Acoustic transducer
US5789844A (en) * 1994-04-01 1998-08-04 Benthos, Inc. Acoustic transducer
US5780958A (en) * 1995-11-03 1998-07-14 Aura Systems, Inc. Piezoelectric vibrating device
US6478744B2 (en) 1996-12-18 2002-11-12 Sonomedica, Llc Method of using an acoustic coupling for determining a physiologic signal
US7416531B2 (en) 1996-12-18 2008-08-26 Mohler Sailor H System and method of detecting and processing physiological sounds
US10925573B2 (en) 2017-10-04 2021-02-23 Ausculsciences, Inc. Auscultatory sound-or-vibration sensor
US11896420B2 (en) 2017-10-04 2024-02-13 Ausculsciences, Inc. Auscultatory sound-or-vibration sensor
US20230371917A1 (en) * 2020-10-06 2023-11-23 The George Washington University Auscultation wearable with mechanical amplifier and offset acoustic transducers

Also Published As

Publication number Publication date
JPS49120222U (enExample) 1974-10-15
JPS5410902Y2 (enExample) 1979-05-18

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