Patent US4453448A successfully refreshed from Google Patents.
US4453448A
Expired / Lapsed
US
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Method and apparatus for tuning percussion instruments
Assignee: Individual
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Filing: 1983-02-24
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Granted: 1984-06-12
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Expires: 2003-02-24
Abstract
Abstract A tuning device for tympani that displays the pitch of each instrument's tympanum. The pitch is determined by measuring the strain in an adjustable tensioning mechanism employed in all tympani to keep proper tension on the tympanum. The pitch or tone of the tympani is determined by the vibration frequency of the tympanum when the tympani is played and the frequency is determined by the tension in the tympanum. A transducer measures the strain in the tensioning mechanism to give an accurate indication of what the tympanum tension, and therefore the pitch, of the tympani would be when played. The transducer includes a resistance-type strain gage mounted on the tympanum tensioning mechanism. The length of the conductor in the strain gage and therefore its resistance, changes with stress changes in the tensioning mechanism used to tune the tympani. A switch means selects a desired one of the strain gages mounted on each of the one or more tympani for inclusion as one section of a four-section resistance bridge circuit configuration. A signal conditioning module provides excitation to the bridge circuit and also conditions the output of the bridge circuit. The output of the bridge circuit varies as the resistance of the strain gage varies. The conditioned output of the bridge circuit is displayed on a voltmeter whose scale has been calibrated to indicate the pitch of the tympani being monitored.
Inventors
- 👤 Edward J. Miesak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:52
CPC Classifications
G; G10; G10D; G10D13/00; G10D13/01; G10D13/04; G10G; G10G7/00; G10G7/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
201 words
A pitch monitoring device for use with one or more pitched membrane percussion musical instruments, each instrument having a tympanum and an adjustable tuning mechanism connected to the tympanum for varying the tension in the tympanum to control the pitch of the instrument, and the adjustable tuning mechanism has a common structural member through which all tensile stress forces applied to the tympanum must pass, said device comprising: transducer means for monitoring tensile stress in the common structural member of the adjustable tuning mechanism and providing an output signal that indicates the tensile stresses present in the common structural member, a signal conditioning module means connected to said transducer means for providing a regulated excitation voltage thereto, said module means further including signal conditioning circuitry connected to said transducer means for receiving the transducer means output signal and conditioning said transducer means output signal, and thereafter providing a conditioned signal representative of the tensile stresses measured by said transducer means, a regulated power supply connected to said signal conditioning module for providing power thereto, and readout means connected to said module means for receiving the conditioned output thereof and providing a visual indication of the pitch of the instrument being monitored.
Claim 2
Dependent Claim
201 words
A pitch monitoring device for use with one or more pitched membrane percussion musical instruments, each instrument having a tympanum and an adjustable tuning mechanism connected to the tympanum for varying the tension in the tympanum to control the pitch of the instrument, and the adjustable tuning mechanism has a common structural member through which all tensile stress forces applied to the tympanum must pass, said device comprising: transducer means for monitoring tensile stress in the common structural member of the adjustable tuning mechanism and providing an output signal that indicates the tensile stresses present in the common structural member, a signal conditioning module means connected to said transducer means for providing a regulated excitation voltage thereto, said module means further including signal conditioning circuitry connected to said transducer means for receiving the transducer means output signal and conditioning said transducer means output signal, and thereafter providing a conditioned signal representative of the tensile stresses measured by said transducer means, a regulated power supply connected to said signal conditioning module for providing power thereto, and readout means connected to said module means for receiving the conditioned output thereof and providing a visual indication of the pitch of the instrument being monitored.
Claim 3
Dependent Claim
69 words
The device recited in claim 1 wherein said transducer means includes: a resistance-type electrical bridge circuit having a resistance-type strain guage as one component thereof, said strain gage being mounted on the common structural member in such manner that variations in the tensile stress therein will cause the resistance of the strain gage to vary and result in a corresponding change in the output signal of said transducer means.
Claim 4
Dependent Claim
67 words
The device recited in claim 2 wherein said transducer means includes: a plurality of resistance-type strain gages connected in parallel, each of said strain gages being mounted on a different instrument, and selector switch means connected into the bridge circuit for selecting and inserting a desired one of said plurality of strain gages into the bridge circuit, whereby the pitch of a particular instrument can be monitored.
Claim 5
Dependent Claim
13 words
The device recited in claim 3 wherein said readout means is a voltmeter.
Claim 6
Dependent Claim
30 words
The device recited in claim 4 wherein the face of said voltmeter is calibrated in musical pitch notations so that the pitch of the instrument can be read out directly.
Claim 7
Dependent Claim
30 words
The device recited in claim 3 wherein said bridge circuit includes four resistance sections, three sections being formed by fixed resistances and the fourth section by a selected strain gage.
Claim 8
Dependent Claim
28 words
The device recited in claim 6 wherein balancing means are included in the bridge circuit for providing a balanced bridge circuit for each position of said selector switch.
Claim 9
Independent Claim
122 words
A method for tuning tympani that have adjustable tensioning mechanisms for tensioning the tympanums thereof, and the tensioning mechanisms have a common structural member through which all tensile forces applied to the tympanum must pass, said method comprising the steps of: selecting the particular tympani to be tuned, measuring the tensile stresses in the common structural member of the tympani adjustable tension mechanism for the tympani selected and providing an output signal indicative of the tensile stress, converting the tensile stress measurement signal into a readout signal indicative of the pitch of the tympani, and observing the readout signal on a visual readout means and adjusting the adjustable tensioning mechanism until a desired pitch indication is indicated on the visual readout means.
Claim 10
Independent Claim
122 words
A method for tuning tympani that have adjustable tensioning mechanisms for tensioning the tympanums thereof, and the tensioning mechanisms have a common structural member through which all tensile forces applied to the tympanum must pass, said method comprising the steps of: selecting the particular tympani to be tuned, measuring the tensile stresses in the common structural member of the tympani adjustable tension mechanism for the tympani selected and providing an output signal indicative of the tensile stress, converting the tensile stress measurement signal into a readout signal indicative of the pitch of the tympani, and observing the readout signal on a visual readout means and adjusting the adjustable tensioning mechanism until a desired pitch indication is indicated on the visual readout means.
Claim 11
Dependent Claim
33 words
The method recited in claim 8 wherein the tensile stresses are measured using a transducer means that includes a resistance-type strain gage mounted on the common structural member of each tympani being monitored.
Claim 12
Dependent Claim
23 words
The method recited in claim 9 wherein the tensile stress measurement signal is conditioned by a conditioning module to provide a readout signal.
References Cited (Backward Citations)
US3197697A
Cited
US3163075A
Cited
US3509264A
Cited
US3805600A
Cited
DE2559092A1
Cited
US4023462A
Cited
US4056998A
Cited
US4248094A
Cited
US4375180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |