Acoustic and electronic stethoscope
First Claim
1. A STETHOSCOPE COMPRISING IN COMBINATION, AN ACOUSTICAL SOUND PICK-UP HEAD MEANS, A FIRST ACOUSTICAL CHAMBER, AN ELONGATED CONDUIT MEANS HAVING AN AIR COLUMN OF APPRECIABLE LENGTH AS COMPARED WITH ITS CROSSSECTIONAL AREA CONNECTING SAID SOUND PICK-UP HEAD MEANS AND SAID FIRST ACOUSTICAL CHAMBER, A SECOND ACOUSTICAL CHAMBER, SOUND DUCT AND VALVE MEANS INTERCONNECTING THE TWO ACOUSTICAL CHAMBERS, SAID VALVE MEANS IN ONE POSITION INTERRUPTING THE SOUND COMMUNICATION BETWEEN THE FIRST AND SECOND CHAMBERS, A MICROPHONE IN SAID FIRST ACOUSTICAL CHAMBER, A SOUND REPRODUCER IN SAID SECOND ACOUSTICAL CHAMBER, AN AMPLIFIER NETWORK INTERCONNECTING THE MICROPHONE AND THE SOUND REPRODUCER, SAID AMPLIFIER MEANS HAVING A CONTROL MEANS, MEAN CONNECTING THE CONTROL MEANS AND SAID VALVE MEANS WHEREBY WHEN SAID AMPLIFIER IS ACTIVATED SAID VALVE MEANS INTERRUPTS THE
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Accused Products
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Citations
1 Claim
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1. A STETHOSCOPE COMPRISING IN COMBINATION, AN ACOUSTICAL SOUND PICK-UP HEAD MEANS, A FIRST ACOUSTICAL CHAMBER, AN ELONGATED CONDUIT MEANS HAVING AN AIR COLUMN OF APPRECIABLE LENGTH AS COMPARED WITH ITS CROSSSECTIONAL AREA CONNECTING SAID SOUND PICK-UP HEAD MEANS AND SAID FIRST ACOUSTICAL CHAMBER, A SECOND ACOUSTICAL CHAMBER, SOUND DUCT AND VALVE MEANS INTERCONNECTING THE TWO ACOUSTICAL CHAMBERS, SAID VALVE MEANS IN ONE POSITION INTERRUPTING THE SOUND COMMUNICATION BETWEEN THE FIRST AND SECOND CHAMBERS, A MICROPHONE IN SAID FIRST ACOUSTICAL CHAMBER, A SOUND REPRODUCER IN SAID SECOND ACOUSTICAL CHAMBER, AN AMPLIFIER NETWORK INTERCONNECTING THE MICROPHONE AND THE SOUND REPRODUCER, SAID AMPLIFIER MEANS HAVING A CONTROL MEANS, MEAN CONNECTING THE CONTROL MEANS AND SAID VALVE MEANS WHEREBY WHEN SAID AMPLIFIER IS ACTIVATED SAID VALVE MEANS INTERRUPTS THE
Specification
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Current AssigneeRalph Cefaly, Ronald E. Irons
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Original AssigneeRalph Cefaly, Ronald E. Irons
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InventorsRALPH CEFALY, Irons, Ronald E.
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Application NumberUS04/378,249Time in Patent Office662 DaysField of SearchUS Class Current381/67CPC Class CodesA61B 7/02 Stethoscopes acoustic detai...
