GB568128A - Acoustic Stethoscope - Google Patents

Acoustic Stethoscope

Info

Publication number
GB568128A
GB568128A GB523943A GB523943A GB568128A GB 568128 A GB568128 A GB 568128A GB 523943 A GB523943 A GB 523943A GB 523943 A GB523943 A GB 523943A GB 568128 A GB568128 A GB 568128A
Authority
GB
United Kingdom
Prior art keywords
ear
pieces
front face
april
bore
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
Application number
GB523943A
Inventor
Harry F. Olson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB568128A publication Critical patent/GB568128A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B7/00—Instruments for auscultation
    • A61B7/02—Stethoscopes

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Headphones And Earphones (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

568,128. Stethoscopes. RADIO CORPORATION OF AMERICA. April 1, 1943, No. 5239. Convention date, April 1, 1942. [Class 81 (ii)] A stethoscope has a body-contacting member 1 having an acoustic impedance substantially equal to that of the area of the body being examined, ear-pieces 21 having an impedance different from that of the member 1 and connecting tubes 15, 17, 19 having a passageway 23, 25, 27 of gradually-varying cross-section and with the acoustic impedances of its ends matching the impedances of the member 1 and ear-pieces 21 respectively. The member 1 comprises a supporting plate 2 having a hollowstem 3 fitted on to the flexible tubing 15 and with a bore 5 communicating with the hollow stem. A backing-member 7, e.g. of rubber, is secured to the front face of the plate with an opening 9 in communication with the bore 5 and a number of pyramidal projections 11 extending forwards from its front face while a diaphragm, e.g. of thin sheet rubber, is secured over the front face of the member 7. The tubing 15 is also connected to a Y connector 17 carrying a pair of ear tubes 19 terminating in ear-pieces 21.
GB523943A 1943-10-29 1943-04-01 Acoustic Stethoscope Expired GB568128A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US50821543 US2389868A (en) 1943-10-29 1943-10-29 Acoustic Stethoscope

Publications (1)

Publication Number Publication Date
GB568128A true GB568128A (en) 1945-03-20

Family

ID=10484202

Family Applications (2)

Application Number Title Priority Date Filing Date
GB523943A Expired GB568128A (en) 1943-10-29 1943-04-01 Acoustic Stethoscope
GB1889444A Expired GB596787A (en) 1943-10-29 1944-10-03 Acoustic Stethoscope

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB1889444A Expired GB596787A (en) 1943-10-29 1944-10-03 Acoustic Stethoscope

Country Status (4)

Country Link
US (2) US2363686A (en)
BE (2) BE474567A (en)
FR (2) FR1018260A (en)
GB (2) GB568128A (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632521A (en) * 1953-03-24 Frequency selector
US3314499A (en) * 1967-04-18 Instrument for quantitating sound intensities
US2573438A (en) * 1946-09-18 1951-10-30 Rca Corp Electroacoustic transducer set
GB732388A (en) * 1951-12-12 1955-06-22 Dictaphone Corp Twin unit stethoscope headphones
BE518558A (en) * 1952-03-20
GB783945A (en) * 1954-12-28
DE1026480B (en) * 1955-01-24 1958-03-20 Dr Emmanuel Roy Bier Breathing cannula with breath noise amplifier
US3294195A (en) * 1965-01-25 1966-12-27 Telex Corp Compressional wave signaling apparatus
US3493075A (en) * 1967-12-26 1970-02-03 Us Navy Single tubing stethoscope
US3690404A (en) * 1971-07-30 1972-09-12 Bio Data Inc Selective frequency stethoscope structure
US4270627A (en) * 1979-07-02 1981-06-02 Hill Raymond R Stethoscope with probe sound pick-up and resonant cavity amplification
US4246776A (en) * 1979-09-25 1981-01-27 Cornell Thompson Leak scope for detecting leaks in plumbing equipment
US4387784A (en) * 1981-10-06 1983-06-14 Hill Raymond R Stethoscope with improved resonant cavity amplification
US4763753A (en) * 1984-07-05 1988-08-16 Etymotic Research, Inc. Insert earphones for audiometry
US4633971A (en) * 1985-11-06 1987-01-06 Minnesota Mining And Manufacturing Company Stethoscope with high frequency filter
US5492129A (en) * 1993-12-03 1996-02-20 Greenberger; Hal Noise-reducing stethoscope
US5530212A (en) * 1995-05-12 1996-06-25 Baffoni; Frank A. Multiple phase stethoscope
US6119806A (en) * 1997-06-24 2000-09-19 Baffoni; Frank A. Multiple phase acoustic systems
FR2823660A1 (en) * 2001-04-18 2002-10-25 Pneumopartners Analysis system for respiratory sounds includes sampling and processing module producing sound parameters for comparison with database
US9404829B1 (en) * 2013-10-02 2016-08-02 Andrew Tien Stethescope based leak detection apparatus with interchangeable heads
KR101637830B1 (en) * 2015-04-30 2016-07-07 서울시립대학교 산학협력단 Stethoscope using helmholtz resonance, method for controlling the same and method for manufacturing the same
WO2016186849A1 (en) 2015-05-15 2016-11-24 3M Innovative Properties Company Stethoscope
KR101697424B1 (en) * 2015-06-02 2017-01-17 서울시립대학교 산학협력단 Mobile terminal system connected to stethoscope using helmholtz resonance, method for controlling the same and method for manufacturing the same
USD814631S1 (en) 2015-09-21 2018-04-03 3M Innovative Properties Company Stethoscope with one-piece tubing, chest piece and diaphragm-rim

Also Published As

Publication number Publication date
FR989229A (en) 1951-09-06
BE474930A (en) 1947-08-30
GB596787A (en) 1948-01-21
US2389868A (en) 1945-11-27
BE474567A (en) 1947-08-30
FR1018260A (en) 1953-01-05
US2363686A (en) 1944-11-28

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