Stethoscope having means for measuring pulse frequency
OwnerJoseph C. Schwalbachinventor
Life of this patent
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Abstract
An improved stethoscope having means for measuring the frequency of a series of pulses, such as human heart pulses, is disclosed, in the use of which such pulses are detected simultaneously with detection of a series of timed detectable reference impulses produced by a reference impulse producer having means for adjusting the frequency of the reference impulses produced thereby and also having readout means indicating the frequency of the reference impulses, wherefore upon adjustment of the frequency of the reference impulses as necessary to match that of said pulses, the frequency of said pulses is indicated on the readout means.
Claims8
In a stethoscope having means for conducting directly to the ears of the user heart or other body sounds of a living subject examined therewith, the improvement comprising an impulse producer capable of producing a series of timed reference impulses having a frequency range of the order of the frequency of heart pulses of living subjects and which can be detected by the stethoscope user at the same time that heart pulses of a living subject being examined with the stethoscope can be heard by such user, means including a movable member for adjusting the frequency of the reference impulses produced by the impulse producer;
- and readout means indicating the frequency of the impulses produced by the impulse producer at any given position of the movable member, wherefore, movement of the movable member as necessary to synchronize the frequency of the reference impulses with that of heart pulses simultaneously detected by the user causes the readout means to indicate the frequency of said heart pulses when such synchrony is achieved.
Dependencies are inferred from the claim text.