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Publication numberUS3858005 A
Publication typeGrant
Publication dateDec 31, 1974
Filing dateNov 15, 1973
Priority dateNov 15, 1973
Publication numberUS 3858005 A, US 3858005A, US-A-3858005, US3858005 A, US3858005A
InventorsSpielburg T
Original AssigneeMarshall R
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Stethoscope with display
US 3858005 A
An improved stethoscope incorporating in addition to conventional cardiac vibration pick up and transmission, miniaturized electronic pick up and display on a cathode ray tube mounted on the back of a chest piece, or attached to the tubing of the stethoscope.
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Description  (OCR text may contain errors)

United States Patent 1191 Marshall et al.

STETHOSCOPE WITH DISPLAY Inventors: Robert A. Marshall, 132 Sherman St., Cambridge, Mass. 02138; Theodore E. Spielburg, 27 Lexington Rd., Wellesley, Mass. 02181 Filed: Nov. 15, 1973 Appl. No.: 416,024

U.S. Cl. 179/1 ST, 128/205 S Int. Cl A61b 7/02 Field of Search 179/1 ST; 128/205 S References Cited UNITED STATES PATENTS 9/1962 Seven et al l79/l ST Primary ExaminerWilliam C. Cooper Attorney, Agent, or Firm-Lawrence S. Cohen 5 7 ABSTRACT An improved stethoscope incorporating in addition to conventional cardiac vibration pick up and transmission, miniaturized electronic pick up and display on a cathode ray tube mounted on the back of a chest piece, or attached to the tubing of the stethoscope.

1 Claim, 5 Drawing Figures PATENTEDUEB31 I974 FIG. I


FIG3 4/ FIG. 4

BACKGROUND OF THE INVENTION This invention relates to stethoscopes and particularly to a stethoscope having electronic display capability as well as conventional listening capability. The stethoscope is an old and well known instrument used by physicians for listening to the heart and other areas of the body. It generally serves as a pick up and transmittance means, through air, of the sounds from the subjects body to the physician s ears. The pick up is accomplished usually by a diaphragm or a bell which picks up vibrations and itself vibrates, which vibrations are transmitted through tubes to the ears of the listener. The interpretation of the sounds is sometimes difficult, takes a great deal of skill, and may be debatable among various physicians.

Therefore, some electronic means have been devised to detect and record cardiac sounds in a more objective manner. However, none has enabled the use of a small, portable device like the conventional stethoscope. Such electronic means, called phonocardiograph machines, are usually very large, requiring the patient to be brought to a special location. Others utilize special pick up means which are attached to the patients body and are adapted to the recording device. The audible output, if available, is always electronically amplified and not nautral.

The present invention is an improvement on the conventional stethoscope retaining its portability and conventional, manual use while providing an electronic display capability so as to be able to see simultaneously the oscilloscopic representations of the unamplified sounds one is hearing.

SUMMARY OF THE INVENTION The invention is an improved stethoscope having a diaphragm or bell pick up, communicating with a divided tubing for transmitting heart sounds to a listeners ears and also including means to pick up and convert heart or other bodily sounds to an electrical signal; a miniaturized amplifier mounted to receive the signal and a small cathode ray tube receiving the output of the amplifier to display for example, the heart sounds, as in a phonocardiograph.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a preferred embodiment of the stethoscope of the invention, partially broken away.

FIG. 2 is a cross sectional side view of the chest piece of this invention.

FIG. 3 is a rear view of the chest piece.

FIG. 4 is a side view of the power supply section.

FIG. 5 is a top view of the power supply.

DESCRIPTION OF THE PREFERRED EMBODIMENT The improved stethoscope is seen in FIGS. 1 and 2 as having a chest piece 1 and a tube assembly 2 and a power source 3.

The chest piece as shown in further detail in FIGS. 2 and 3 has a pick up section comprising a housing 4a diaphragm or bell 5 and a transmission space 6. Mounted on the diaphragm or bell are crystal sound pick ups 7 in this preferred embodiment. A carbon particle-type microphone might also be used.

The pick ups 7 are present in such number and at such points on the diaphragm as may be determined by conventional experimentation to provide the best results. From the crystal pick ups 7, three being shown, wires 8 lead to a miniaturized amplifier 9 diagrammatically shown as being mounted on a printed circuit board. The amplifier is connected to a miniaturized cathode ray tube 10 diagrammatically illustrated, having its tube face 11 facing outwardly at the rear of the chest piece 1; that is, opposite the diaphragm 5.

The amplifier 9 and cathode ray tube 10 are powered by a power supply 13, comprising, in this preferred embodiment, a mercury battery 13 mounted on a cap 14 which sets into the housing 4 and connects operably to the components to which it supplies power.

In FIG. 4 the cathode ray tube face 11 is represented with exemplary controls such as on/off contrast 15, and focus 16. Other desirable controls such as freeze and repeat may be provided.

The transmission space 6 usually containing air communicates with air in the hollow tube assembly 2 which divides to forks 17 and 18 and which terminate in ear pieces 19.

In use, the stethoscope is applied in a manner known to physicians and others similarly skilled, to a patients body. Cardiac vibrations, for example, are picked up by the diaphragm or bell 5 and transmitted through the air in the transmission space 6 and the tube assembly 2 to the listeners ear without electrical amplification in this preferred embodiment.

Simultaneously, the vibrations are converted by the crystal pick ups 7, for example, to electrical signals and transmitted via the wires 8 to the amplifier 9 where they are processed and fed to the cathode ray tube 10. The vibrations thus picked up from the patients body are displayed as a signal or oscilloscopic pattern directly on the stethoscope for instant interpretation.

The cathode ray tube display would usually be used in conjunction with the manual use of the stethoscope, one complimenting the other.

We claim:

1. An improved stethoscope comprising:

a. a chest piece having a body containing:

1. a pick up section;

2. an amplifier section; and

3. a display section; in which the pick up section comprises a diaphragm or bell mounted on the body and adapted to pick up the vibration of heart or other bodily sounds and a transmission space containing a vibration transmitting medium and means to pick up the vibration of heart sounds and convert them to an electrical signal and transmit them to the amplifier section; and

in which the amplifier section is spaced from the diaphragm or bell and comprises miniaturized circuitry adapted to receive the transmissions from the pick up section, amplify and transmit signals to the display section; and

in which the display section comprises a miniaturized cathode ray tube for receiving and displaying a signal from the amplifier section, the display section being located on the stethoscope proximate to the bod b. a tu be assembly comprising a hollow tube communicating with the transmission space and dividing to form a pair of tubes adapted to reach the ears of the stethoscope user and to transmit the vibration of heart or other bodily sounds.

c. an integral power source for operating the amplifier and the cathode ray tube.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3052756 *Jul 10, 1958Sep 4, 1962 Phonocardiography apparatus
US3247324 *Jun 26, 1964Apr 19, 1966CefalyAcoustic and electronic stethoscope
DE1215299B *Nov 14, 1963Apr 28, 1966Dr Med Helmut KronschwitzTransportables, in Klein- und Leichtbauweise ausgefuehrtes Geraet zur Sichtbarmachung der Herzstromkurve
GB871595A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4534058 *Mar 29, 1983Aug 6, 1985The Hart GroupElectronic stethoscope with automatic power shut-off
US4591668 *Jun 20, 1984May 27, 1986Iwata Electric Co., Ltd.Vibration-detecting type microphone
US4628939 *Nov 10, 1983Dec 16, 1986Hughes Aircraft CompanyMethod and improved apparatus for analyzing heart activity
US4672975 *Jun 17, 1985Jun 16, 1987Vladimir SirotaStethoscope with image of periodically expanding and contracting heart
US4783813 *Dec 24, 1986Nov 8, 1988Lola R. ThompsonElectronic sound amplifier stethoscope with visual heart beat and blood flow indicator
US5003605 *Aug 14, 1989Mar 26, 1991Cardiodyne, Inc.Electronically augmented stethoscope with timing sound
US5213108 *Oct 24, 1991May 25, 1993Blood Line Technology, Inc.Visual display stethoscope
US5218969 *Dec 17, 1990Jun 15, 1993Blood Line Technology, Inc.Intelligent stethoscope
US5602924 *Dec 9, 1993Feb 11, 1997Theratechnologies Inc.Electronic stethescope
US5825895 *Jul 19, 1996Oct 20, 1998Stethtech CorporationElectronic stethoscope
US6002777 *Mar 17, 1998Dec 14, 1999Stethtech CorporationElectronic stethoscope
US6026170 *Nov 27, 1995Feb 15, 2000Minnesota Mining And Manufacturing CompanyElectronic stethoscope with idealized bell and idealized diaphragm modes
US6757392 *Jun 17, 1996Jun 29, 2004Artemio GranzottoElectronic stethoscope
US7721843 *Feb 8, 2006May 25, 2010The United States Of America As Represented By The Secretary Of The NavyVisual acoustic device
US8092396Oct 20, 2006Jan 10, 2012Merat BaghaElectronic auscultation device
US9398891Mar 24, 2008Jul 26, 2016Tiba Medical, Inc.Multiple communication interface medical examination apparatus, system, and/or method
US20020071570 *Dec 5, 2001Jun 13, 2002Gerard CohenHybrid structure
US20070106179 *Oct 20, 2006May 10, 2007Tiba Medical, Inc.Medical examination apparatus, system, and/or method
EP0397787A1 *Jan 23, 1989Nov 22, 1990Blood Line Technology, Inc.Intelligent stethoscope
EP0397787A4 *Jan 23, 1989Jan 30, 1991Blood Line TechnologyIntelligent stethoscope
U.S. Classification600/528, 381/67
International ClassificationA61B7/00, G01R13/20, A61B7/04
Cooperative ClassificationG01R13/20, A61B7/04
European ClassificationG01R13/20, A61B7/04