CA2924865A1 - Active hum-cancelling bowed instrument bridge and electromagnetic pickup - Google Patents
Active hum-cancelling bowed instrument bridge and electromagnetic pickup Download PDFInfo
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- CA2924865A1 CA2924865A1 CA2924865A CA2924865A CA2924865A1 CA 2924865 A1 CA2924865 A1 CA 2924865A1 CA 2924865 A CA2924865 A CA 2924865A CA 2924865 A CA2924865 A CA 2924865A CA 2924865 A1 CA2924865 A1 CA 2924865A1
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- Prior art keywords
- violin
- bridge
- pickup
- bowed instrument
- instrument
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- 238000000034 method Methods 0.000 claims abstract description 7
- 230000003321 amplification Effects 0.000 claims abstract description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 241000405217 Viola <butterfly> Species 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 230000002950 deficient Effects 0.000 abstract 1
- 229910001369 Brass Inorganic materials 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010951 brass Substances 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 5
- 239000002023 wood Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 241000208140 Acer Species 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000023514 Barrett esophagus Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000010361 transduction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
- G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
- G10D3/04—Bridges
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
- G10D1/00—General design of stringed musical instruments
- G10D1/02—Bowed or rubbed string instruments, e.g. violins or hurdy-gurdies
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H3/00—Instruments in which the tones are generated by electromechanical means
- G10H3/12—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument
- G10H3/14—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means
- G10H3/143—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means characterised by the use of a piezoelectric or magneto-strictive transducer
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H3/00—Instruments in which the tones are generated by electromechanical means
- G10H3/12—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument
- G10H3/14—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means
- G10H3/18—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means using a string, e.g. electric guitar
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H3/00—Instruments in which the tones are generated by electromechanical means
- G10H3/12—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument
- G10H3/14—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means
- G10H3/18—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means using a string, e.g. electric guitar
- G10H3/185—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument using mechanically actuated vibrators with pick-up means using a string, e.g. electric guitar in which the tones are picked up through the bridge structure
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H2220/00—Input/output interfacing specifically adapted for electrophonic musical tools or instruments
- G10H2220/461—Transducers, i.e. details, positioning or use of assemblies to detect and convert mechanical vibrations or mechanical strains into an electrical signal, e.g. audio, trigger or control signal
- G10H2220/465—Bridge-positioned, i.e. assembled to or attached with the bridge of a stringed musical instrument
- G10H2220/471—Bridge-positioned, i.e. assembled to or attached with the bridge of a stringed musical instrument at bottom, i.e. transducer positioned at the bottom of the bridge, between the bridge and the body of the instrument
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H2220/00—Input/output interfacing specifically adapted for electrophonic musical tools or instruments
- G10H2220/461—Transducers, i.e. details, positioning or use of assemblies to detect and convert mechanical vibrations or mechanical strains into an electrical signal, e.g. audio, trigger or control signal
- G10H2220/505—Dual coil electrodynamic string transducer, e.g. for humbucking, to cancel out parasitic magnetic fields
- G10H2220/515—Staggered, i.e. two coils side by side
Abstract
This violin bridge pickup is an electrically amplified active hum-cancelling magnetic coil transducer and violin bridge that incorporates rotational movement and is mechanically adjusting to any acoustic or electric violin or viola with any number of strings to be used in conjunction with an instrument amplifier, PA system, or recording device. This pickup uses an on-board DC powered pre-amplification circuit to boost the signal gain/volume. This invention provides players with a new method of amplifying their violin or viola with an electrical violin pickup that uses magnetic coils in a rotational fashion and which is both a modification and replacement of the common wooden violin bridge. It is an improvement on other methods of bowed instrument amplification which are deficient in producing good sound quality.
Description
DESCRIPTION
FIELD OF INVENTION
This invention is in the field of electronic transducer systems or pickups for musical instruments, applied specifically to acoustic and electric bowed instruments, violins, violas and cellos.
PRIOR ART
No prior art can be found which discloses the present invention. No patents, no publications and no known application discloses the method or apparatus of the present invention.
The prior art has produced several types of effective transducer systems for bowed/stringed instruments, however, none of them offer a bridge replacement pickup system using an active hum-cancelling rotational coil transducer configuration with an on-board active pre-amplification circuit on a bowed instrument. All coil based transducer pickups, hum-cancelling or otherwise, are not used in a bridge replacement configuration on a bowed instrument. All other bridge replacement systems involve other transducer technologies such as piezo technology, and/or include components made from wood. All other transducer pickups for bowed instruments require a physical modification to the instrument, or in many cases the construction of a custom instrument in order to accommodate the design of the transducer.
The present invention does not require any such modification(s).
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1A shows drawings of the complete, assembled pickup/bridge, covered and uncovered and
FIELD OF INVENTION
This invention is in the field of electronic transducer systems or pickups for musical instruments, applied specifically to acoustic and electric bowed instruments, violins, violas and cellos.
PRIOR ART
No prior art can be found which discloses the present invention. No patents, no publications and no known application discloses the method or apparatus of the present invention.
The prior art has produced several types of effective transducer systems for bowed/stringed instruments, however, none of them offer a bridge replacement pickup system using an active hum-cancelling rotational coil transducer configuration with an on-board active pre-amplification circuit on a bowed instrument. All coil based transducer pickups, hum-cancelling or otherwise, are not used in a bridge replacement configuration on a bowed instrument. All other bridge replacement systems involve other transducer technologies such as piezo technology, and/or include components made from wood. All other transducer pickups for bowed instruments require a physical modification to the instrument, or in many cases the construction of a custom instrument in order to accommodate the design of the transducer.
The present invention does not require any such modification(s).
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1A shows drawings of the complete, assembled pickup/bridge, covered and uncovered and
2 the battery/output module FIG. 1B shows the complete invention mounted onto an acoustic violin FIG. 2A shows a full assembly drawing of components to identify all parts to be described and their relationships to each other FIG. 2B is a schematic drawing of the pickup apparatus FIG. 2C shows a schematic drawing of the battery/output module FIG. 2D shows a cross section detail of the pickup bridge, transducers, bobbins and coils BACKGROUND OF THE INVENTION
Violin amplification methods are known and have been heavily experimented with by musicians for several decades. A pickup device is a transducer that captures mechanical vibrations from stringed instruments such as the electric guitar or electric violin, and converts them to an electrical signal that is amplified, recorded, or broadcast.
For example, in the following United States of America patents:
1939: Musical Instrument - F.H. Kislingbury. (2171430) 1948: Pick Up Unit for Instruments - C. Leo Fender. (2455575) 1961: Electric Violin, and Electromagnetic Pickup Therefor - C. Leo Fender.
(3003382) 1963: Electrical stringed instrument- Ampeg Company Inc. (US3244791) 1971: Electromagnetic pickup for a stringed musical instrument - Joe D Ellis.
(US3600496) 1980: Musical instrument transducer - Fishman Lawrence R. (US4356754) 1986: For a stringed instrument having a bridge - Fishman Lawrence R.
(US4785704)
Violin amplification methods are known and have been heavily experimented with by musicians for several decades. A pickup device is a transducer that captures mechanical vibrations from stringed instruments such as the electric guitar or electric violin, and converts them to an electrical signal that is amplified, recorded, or broadcast.
For example, in the following United States of America patents:
1939: Musical Instrument - F.H. Kislingbury. (2171430) 1948: Pick Up Unit for Instruments - C. Leo Fender. (2455575) 1961: Electric Violin, and Electromagnetic Pickup Therefor - C. Leo Fender.
(3003382) 1963: Electrical stringed instrument- Ampeg Company Inc. (US3244791) 1971: Electromagnetic pickup for a stringed musical instrument - Joe D Ellis.
(US3600496) 1980: Musical instrument transducer - Fishman Lawrence R. (US4356754) 1986: For a stringed instrument having a bridge - Fishman Lawrence R.
(US4785704)
3 1992: Electric Guitar/Violin - Robert Schlink. (5085115) 1996: Humbucking pickup for electric guitar. (5525750 A) PICKUPS:
The magnetic pickup or "passive pickup" consists of a permanent magnet with a core of magnetic material, wrapped with a coil of several thousand turns of fine enameled copper wire.
The humbucker is a type of pickup that uses two coils wound opposite of each other to cancel out the interference picked up by coil pickups.
ACTIVE PICKUPS:
Active pickups are transducer pickups that require an electrical source of energy to operate and include an electronic preamp circuit giving a much higher possible output.
They typically have a wider dynamic range than passive pickups, which gives them the capability of producing sounds with higher fidelity and a characteristic clarity.
THE VIOLIN BRIDGE:
Typically made from maple wood, the violin bridge suspends the strings above a bowed instrument under great tension. Exact fitting of a violin bridge is critical to the setup of the instrument. A proper violin bridge establishes correct string height and spacing for playability.
Current violin bridges are made from maple wood and are cut to fit each violin by a luthier.
Bowed instruments form their sound at the bridge. The bridge is a conduit for the strings' vibration, transferring it to the body of the instrument which acts as an acoustic sound resonator.
OVERVIEW
This violin pickup is installed onto the instrument by removing the traditional wooden violin bridge and replacing it with the current invention: the pickup/bridge assembly, which is to be held in place by string tension alone. The Pickup can be adjusted for string height and playability by raising or lowering the pickup on it's base. The battery/output module is then
The magnetic pickup or "passive pickup" consists of a permanent magnet with a core of magnetic material, wrapped with a coil of several thousand turns of fine enameled copper wire.
The humbucker is a type of pickup that uses two coils wound opposite of each other to cancel out the interference picked up by coil pickups.
ACTIVE PICKUPS:
Active pickups are transducer pickups that require an electrical source of energy to operate and include an electronic preamp circuit giving a much higher possible output.
They typically have a wider dynamic range than passive pickups, which gives them the capability of producing sounds with higher fidelity and a characteristic clarity.
THE VIOLIN BRIDGE:
Typically made from maple wood, the violin bridge suspends the strings above a bowed instrument under great tension. Exact fitting of a violin bridge is critical to the setup of the instrument. A proper violin bridge establishes correct string height and spacing for playability.
Current violin bridges are made from maple wood and are cut to fit each violin by a luthier.
Bowed instruments form their sound at the bridge. The bridge is a conduit for the strings' vibration, transferring it to the body of the instrument which acts as an acoustic sound resonator.
OVERVIEW
This violin pickup is installed onto the instrument by removing the traditional wooden violin bridge and replacing it with the current invention: the pickup/bridge assembly, which is to be held in place by string tension alone. The Pickup can be adjusted for string height and playability by raising or lowering the pickup on it's base. The battery/output module is then
4 installed at the edge of the instrument near the chin rest and they are connected with wires.
When the instrument is played, the bridge saddle vibrates rotationally under direct contact with the strings. Two magnetically charged steel core pieces are attracted to the bridge and are affected by it's vibration, causing fluctuations in their magnetic fields.
Each steel core is wound by copper coils in a classic hum-cancelling configuration and are in place to accept these fluctuations and electromagnetically generate an audio signal. This signal then passes through an onboard pre-amplification circuit powered by a 9V DC battery power supply.
The signal then passes through to the instrument amplifier or PA system connected to the instrument.
All magnetic coil transducers are designed to read the changes in the magnetic field of a magnet as it is reacts to the string that is always suspended above it. This pickup's design and function differs from the traditional concept in that the magnetic field is changed due to the rotational movement of a metallic bridge saddle itself as vibrations are transferred to it from the strings through direct contact. This method becomes necessary with bowed instruments where the majority of vibration and sound production takes place at the bridge, itself. The bow generates friction causing vibrational sound, but it also mutes most of the strings' resonance which greatly reduces the amount of signal that is possible with suspension (non-contact) method pickups.
Other bridge replacement pickups for bowed instruments harness this vibration without modifying this relationship of 'string-to-instrument' vibrational transmission. This bridge pickup system is different from previous bridge replacement pickups in that it intercepts these vibrations, harnessing the strings' full potential on any bowed instrument, acoustic or electric.
DETAILED DESCRIPTION
FIG. 1A
The bowed instrument bridge pickup apparatus 1 with cover 2, the bowed instrument pickup apparatus uncovered with components exposed 3, and the battery/output module 4.
FIG. 18 The complete invention mounted onto a violin FIG. 2A
The Pickup This image shows a schematic breakdown of the pickup apparatus in orthographic view. The bridge 4 is formed by a strip of steel, iron, or other hard material containing steel, with a curved arch top 6 and a threaded non-magnetic brass shaft protruding from its bottom
When the instrument is played, the bridge saddle vibrates rotationally under direct contact with the strings. Two magnetically charged steel core pieces are attracted to the bridge and are affected by it's vibration, causing fluctuations in their magnetic fields.
Each steel core is wound by copper coils in a classic hum-cancelling configuration and are in place to accept these fluctuations and electromagnetically generate an audio signal. This signal then passes through an onboard pre-amplification circuit powered by a 9V DC battery power supply.
The signal then passes through to the instrument amplifier or PA system connected to the instrument.
All magnetic coil transducers are designed to read the changes in the magnetic field of a magnet as it is reacts to the string that is always suspended above it. This pickup's design and function differs from the traditional concept in that the magnetic field is changed due to the rotational movement of a metallic bridge saddle itself as vibrations are transferred to it from the strings through direct contact. This method becomes necessary with bowed instruments where the majority of vibration and sound production takes place at the bridge, itself. The bow generates friction causing vibrational sound, but it also mutes most of the strings' resonance which greatly reduces the amount of signal that is possible with suspension (non-contact) method pickups.
Other bridge replacement pickups for bowed instruments harness this vibration without modifying this relationship of 'string-to-instrument' vibrational transmission. This bridge pickup system is different from previous bridge replacement pickups in that it intercepts these vibrations, harnessing the strings' full potential on any bowed instrument, acoustic or electric.
DETAILED DESCRIPTION
FIG. 1A
The bowed instrument bridge pickup apparatus 1 with cover 2, the bowed instrument pickup apparatus uncovered with components exposed 3, and the battery/output module 4.
FIG. 18 The complete invention mounted onto a violin FIG. 2A
The Pickup This image shows a schematic breakdown of the pickup apparatus in orthographic view. The bridge 4 is formed by a strip of steel, iron, or other hard material containing steel, with a curved arch top 6 and a threaded non-magnetic brass shaft protruding from its bottom
5. The top edge forms a bezier curve 6 that is characteristic of the top of a bowed instrument's wooden bridge.
This is where the strings make contact. The threaded brass shaft extends below to penetrate a threaded brass nut 7, which is fixed to a brass base 8. The base is horizontally supported by two channels running lengthwise along each side 9. The PC circuit board carrying a preamp SMD
circuit 10 fits between these two channels on the underside of the brass base 8 with the SMD
electronic components facing down. Sandwiched between the bridge 4 and brass base 8 are two transducers. Two rectangular steel blocks 12 form the center or core of each transducer.
This is where the strings make contact. The threaded brass shaft extends below to penetrate a threaded brass nut 7, which is fixed to a brass base 8. The base is horizontally supported by two channels running lengthwise along each side 9. The PC circuit board carrying a preamp SMD
circuit 10 fits between these two channels on the underside of the brass base 8 with the SMD
electronic components facing down. Sandwiched between the bridge 4 and brass base 8 are two transducers. Two rectangular steel blocks 12 form the center or core of each transducer.
6 Each block is housed by a polymer bobbin 11 which is rectangular in shape with an upper plate 14 and lower plate 15 and separated at the center by a thin sleeve 16 which tightly fits each steel/iron block 12 and acts as a barrier between the copper coils 13 and steel/iron block 12 to prevent electrical shorting. Each bobbin 11 holds several thousand windings of thin enameled copper wire 13. One bobbin is wound clockwise, and the other bobbin is wound counterclockwise, characteristic of a typical hum-cancelling arrangement. Both bobbins rest directly above a solitary polymer base 17 with two through holes 18 sized to fit two thin magnets 19 that exactly line up to the center of each bobbin 12. All of the above mentioned apparatus is secured by four mounting screws, one at each corner 20. A polymer casing 35 snugly fits over the entire apparatus with a hole at the top of the cover to allow the threaded brass shaft to protrude.
The Mounting System This apparatus is suspended above the violin by a contoured footing 21. The footing is bezier curved 22 to match the curvature of the violin's arched top. A threaded nut is fixed to the top of the curved base at the apex of the arch 23. The pickup bridge's protruding bolt 5 engages the threaded nut 23 and operates to finely adjust the height of the apparatus. Two thin layers of padding 24 are fixed to the underside of footing as a barrier against the delicate wood surface of a violin. This makes up the mechanism for the mounting, raising and lowering of the apparatus for fine adjustment in string height.
The Mounting System This apparatus is suspended above the violin by a contoured footing 21. The footing is bezier curved 22 to match the curvature of the violin's arched top. A threaded nut is fixed to the top of the curved base at the apex of the arch 23. The pickup bridge's protruding bolt 5 engages the threaded nut 23 and operates to finely adjust the height of the apparatus. Two thin layers of padding 24 are fixed to the underside of footing as a barrier against the delicate wood surface of a violin. This makes up the mechanism for the mounting, raising and lowering of the apparatus for fine adjustment in string height.
7 FIG. 2C
The Battery Compartment and Output box A two conductor shielded cable 25 is connected from the pickup's onboard circuit 10 to an external polymer box 26 which is sized to fit one 9V battery 31, a 1/4 inch female output connector 27 side by side, and a volume potentiometer 32. Both the 9V battery compartment opening and output jack face the same direction in the battery/output module.
Most of the battery compartment is elevated off the surface of the violin to avoid making contact with the violin itself 28. A short foot extends below the module at the front edge where it makes contact with the violin top 29. Here, clamps commonly used for holding a violin chin rest are used in this design, mounted to holes in the front of the box 30. These clamps hold the object downwards, firmly, to the instrument's surface.
FIG. 2D
Cross Section This to scale schematic image represents a cross section of the bridge and coil transducers in profile . The steel cores 12 are inserted into bobbins 11 which are wound with fine enameled copper wire 13. Each of the transducer coils' windings of enameled copper wires' ends are soldered to metal lugs 33 at the center of the device acting as electrical terminals which extend through the polymer base 17, brass base 8, and penetrates the PC circuit board where contacts are made to active circuit below. A gap 34 is left between the bobbins/cores and the bridge above 4. This allows for unimpeded microphonics in the transduction of the bridge's vibrations.
The Battery Compartment and Output box A two conductor shielded cable 25 is connected from the pickup's onboard circuit 10 to an external polymer box 26 which is sized to fit one 9V battery 31, a 1/4 inch female output connector 27 side by side, and a volume potentiometer 32. Both the 9V battery compartment opening and output jack face the same direction in the battery/output module.
Most of the battery compartment is elevated off the surface of the violin to avoid making contact with the violin itself 28. A short foot extends below the module at the front edge where it makes contact with the violin top 29. Here, clamps commonly used for holding a violin chin rest are used in this design, mounted to holes in the front of the box 30. These clamps hold the object downwards, firmly, to the instrument's surface.
FIG. 2D
Cross Section This to scale schematic image represents a cross section of the bridge and coil transducers in profile . The steel cores 12 are inserted into bobbins 11 which are wound with fine enameled copper wire 13. Each of the transducer coils' windings of enameled copper wires' ends are soldered to metal lugs 33 at the center of the device acting as electrical terminals which extend through the polymer base 17, brass base 8, and penetrates the PC circuit board where contacts are made to active circuit below. A gap 34 is left between the bobbins/cores and the bridge above 4. This allows for unimpeded microphonics in the transduction of the bridge's vibrations.
Claims (6)
1. The combination of a bowed instrument bridge constructed of magnetically attractive material and coil based transducer(s) in one complete unit mounted on the face of a bowed instrument.
2. The design of a magnetic coil transducer(s) mounted within the construction of a bowed instrument bridge, itself, on a shaft at it's center axis point.
3. The combination of two magnetic coil transducers in the hum-cancelling configuration and an on-board, powered pre-amplification circuit within a bowed instrument's bridge.
4. The method of a bowed instrument bridge constructed on a shaft at the center axis and its operation of allowing threaded string height adjustment, and allowing for rotational movement of all parts.
5. The specific design of the bobbins for copper wire windings used in the construction of transducers.
6. The design and configuration of the violin top-mounted battery compartment, volume and output jack module: specifically the configuration and placement of its parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2924865A CA2924865A1 (en) | 2016-03-15 | 2016-03-15 | Active hum-cancelling bowed instrument bridge and electromagnetic pickup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2924865A CA2924865A1 (en) | 2016-03-15 | 2016-03-15 | Active hum-cancelling bowed instrument bridge and electromagnetic pickup |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2924865A1 true CA2924865A1 (en) | 2017-09-15 |
Family
ID=59846862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2924865A Abandoned CA2924865A1 (en) | 2016-03-15 | 2016-03-15 | Active hum-cancelling bowed instrument bridge and electromagnetic pickup |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2924865A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3570272A1 (en) * | 2018-05-18 | 2019-11-20 | Makropoulos, Rigas | Removable electromagnetic transducer for violin bridge |
-
2016
- 2016-03-15 CA CA2924865A patent/CA2924865A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3570272A1 (en) * | 2018-05-18 | 2019-11-20 | Makropoulos, Rigas | Removable electromagnetic transducer for violin bridge |
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| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |
Effective date: 20190315 |