US3709084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer volume control for stringed musical instruments
Assignee: Individual
•
Filing: 1971-08-16
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Granted: 1973-01-09
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Expires: 1991-08-16
Abstract
Abstract The amplified output of a stringed musical instrument is momentarily reduced by a variable amount during intervals of engagement. Magnetic sensing means detecting such engagement provides a trigger pulse of short duration which is operative through a volume reducing control circuit to vary the output of an amplifier through which sound is fully amplified only during periods when the strings undergo free vibration.
Inventors
- 👤 G Stobaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:21
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/46; G10H3/00; G10H3/12; G10H3/14; G10H3/18; G10H3/182
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
In combination with a musical instrument having a string adapted to be vibrated by intermittent engagement during short intervals, an amplifier for increasing the volume of sound produced by free vibration of the string and volume changing means momentarily reducing the output of the amplifier during said short intervals, the improvement comprising proximity sensing means mounted in spaced adjacency to said string for detecting engagement of the string, signal generating means connected to the sensing means for developing a short duration signal during said intervals and signal transferring means connecting the signal generating means to the volume changing means for varying the output of the amplifier in response to said signal.
Claim 2
Dependent Claim
111 words
In combination with a musical instrument having a string adapted to be vibrated by intermittent engagement during short intervals, an amplifier for increasing the volume of sound produced by free vibration of the string and volume changing means momentarily reducing the output of the amplifier during said short intervals, the improvement comprising proximity sensing means mounted in spaced adjacency to said string for detecting engagement of the string, signal generating means connected to the sensing means for developing a short duration signal during said intervals and signal transferring means connecting the signal generating means to the volume changing means for varying the output of the amplifier in response to said signal.
Claim 3
Dependent Claim
28 words
The combination of claim 1 wherein said sensing means comprises electromagnetic means connected to the signal generating means for establishing a magnetic field through which the string extends.
Claim 4
Dependent Claim
32 words
The combination of claim 2 wherein the string is adapted to be engaged by a pick containing a material affecting the magnetic field to induce a trigger voltage in the electromagnetic means.
Claim 5
Dependent Claim
44 words
The combination of claim 2 wherein the signal generating means includes a source of voltage connected to the sensing means for operation thereof and switch control means connected to the source of voltage in parallel with the signal transferring means for shunting the same.
Claim 6
Dependent Claim
44 words
The combination of claim 1 wherein the signal generating means includes a source of voltage connected to the sensing means for operation thereof and switch control means connected to the source of voltage in parallel with the signal transferring means for shunting the same.
Claim 7
Dependent Claim
28 words
The combination of claim 5 wherein said sensing means comprises electromagnetic means connected to the signal generating means for establishing a magnetic field Through which the string extends.
Claim 8
Dependent Claim
121 words
In combination with a musical instrument having a string adapted to be vibrated by intermittent engagement during short intervals, an amplifier for increasing the volume of sound produced by free vibration of the string and volume changing means momentarily reducing the output of the amplifier during said short intervals, the improvement comprising magnetic sensing means underlying said string for establishing a magnetic field through which the string extends, signal generating means connected to the sensing means for developing a signal limited to said short intervals in response to said intermittent engagement of the string and signal transferring means connecting the signal generating means to the volume changing means for varying the amount by which the output of the amplifier is reduced.
Claim 9
Dependent Claim
121 words
In combination with a musical instrument having a string adapted to be vibrated by intermittent engagement during short intervals, an amplifier for increasing the volume of sound produced by free vibration of the string and volume changing means momentarily reducing the output of the amplifier during said short intervals, the improvement comprising magnetic sensing means underlying said string for establishing a magnetic field through which the string extends, signal generating means connected to the sensing means for developing a signal limited to said short intervals in response to said intermittent engagement of the string and signal transferring means connecting the signal generating means to the volume changing means for varying the amount by which the output of the amplifier is reduced.
Claim 10
Dependent Claim
50 words
The combination of claim 7 wherein the signal generating means includes a source of voltage connected to the sensing means for operation thereof and switch control means connected to the source of voltage in parallel with the signal transferring means for shunting the same in the absence of said signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |