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公开(公告)号：US20240339092A1
公开(公告)日：2024-10-10
申请号：US18597364
申请日：2024-03-06
发明人： Donald Allen Gilmore
摘要： A method and apparatus for self-tuning a piano that optically senses the vibration of all the piano's strings independently and simultaneously. Interference caused by alternating-current ambient lighting is removed by modulating the string's signal onto a high-frequency carrier wave, filtering out the low-frequency ambient light interference wave, then demodulating and removing the carrier to render the original signal. Digital pitch, diagnostic, and control parameter information is interchanged between a supervisory master microcontroller and the autonomous string sustainer circuits via a master-slave serial bus connected through a single, common cable. PWM duty cycles for the string tuning coils are handled autonomously by an FPGA or a decoder network, which also communicates with the master control circuit. Pulse-width modulated control signals are filtered to a DC control voltage and combined with a drive oscillator signal using a summing amplifier to eliminate audible noise due to magnetostriction in the tuning coils.
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公开(公告)号：US20240153477A1
公开(公告)日：2024-05-09
申请号：US18499656
申请日：2023-11-01
摘要： A keyboard instrument having a key and a link mechanism provided on a lower side of the key, and the link mechanism has a first member having a first fixing fulcrum, a first link pivotally supported on the first fixing fulcrum on one end side, a second member having a second fixing fulcrum provided further forwards and further downwards than the first fixing fulcrum, a second link pivotally supported on the second fixing fulcrum on one end side and a coupling link configured such that a distance between the other end side of the first link rotating about the first fixing fulcrum in response to a key operation and the other end side of the second link rotating about the second fixing fulcrum in response to the key operation is fixed and remains unchanged, and the second link has a counterweight provided further forwards than the second fixing fulcrum.
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公开(公告)号：US20240153476A1
公开(公告)日：2024-05-09
申请号：US18499462
申请日：2023-11-01
摘要： A keyboard apparatus has a hammer supported rotatably on a fulcrum, including a weight disposed further backwards than the fulcrum, and including an extending member configured to extend further forwards than the fulcrum, a key including a hammer press rod configured to move towards and away from the extending member, and a switch, and the extending member includes a press-down area configured to protrude further forwards than the hammer press rod to press down the switch, and the extending member is configured to press down the switch without contacting the hammer press rod.
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公开(公告)号：US20230351983A1
公开(公告)日：2023-11-02
申请号：US18133228
申请日：2023-04-11
IPC分类号： G10C3/12
CPC分类号： G10C3/12
摘要： A keyboard instrument includes a key which includes a weight, and a key base including a top plate and at least one rib configured to fix the weight by holding the weight from below in such a state that the weight is kept in abutment with a lower surface of the top plate.
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公开(公告)号：US11741925B2
公开(公告)日：2023-08-29
申请号：US17604191
申请日：2020-04-09
发明人： Hayato Nishioka , Shinichi Furuya , Masato Hirano , Takanori Oku
CPC分类号： G10H1/346 , G10C3/12 , G10H2220/311 , G10H2220/521
摘要： There is provided an information processing device, an information processing method, and a program that further improve skills. A load weight control unit controls generation of a load weight that becomes a load with respect to motion when a keyboard is depressed by a pianist, and a keystroke recognition unit recognizes motion of the keyboard. Then, the load weight control unit performs control of starting generation of a predetermined load weight at a timing when the keystroke recognition unit recognizes that the keyboard started to be depressed, and ending generation of the load weight at a timing when the keystroke recognition unit recognizes that the keyboard ended to be depressed and started to return. The present technology can be applied to, for example, a performance skill improvement system that evaluates and trains pianists' force sense.
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公开(公告)号：US11727905B2
公开(公告)日：2023-08-15
申请号：US16035365
申请日：2018-07-13
申请人： Ableton AG
发明人： Oliver Harms
CPC分类号： G10H1/34 , G10C3/12 , G10H1/0551 , G10H1/0555 , G10H1/344 , G10H1/46 , H01H13/703 , H01H13/83 , G10H2220/026 , G10H2220/161 , G10H2220/275 , G10H2220/521 , H01H2231/018
摘要： A button unit is suspended vertically and has a button body with an actuating surface and a shaft extending downwardly therefrom. An X-Y sensor unit is arranged below the button body for detecting X-Y positions on the actuating surface. The X-Y sensor unit has one opening such that the shaft can move therethrough. One transfer element is elastically suspended below the shaft and moved downwardly upon downward movement of the shaft. A Z sensor unit is arranged below the transfer element. The Z sensor unit has a detection element for detecting downward movement of the transfer element. The X-Y sensor unit may include a capacitive sensor. The Z sensor unit may include an inductive sensor, a capacitive sensor, or a magnetic sensor. The shaft and the extension may include a translucent material to form a light guide for illuminating the button body via a light source.
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公开(公告)号：US11651753B2
公开(公告)日：2023-05-16
申请号：US17807652
申请日：2022-06-17
申请人： Timothy Jenson
发明人： Timothy Jenson
摘要： A piano tuning retention system includes first and second bushings, each having a threaded upper longitudinal end and a lower longitudinal end that defines a polygonal interior for mating with a polygonal end of a respective piano tuning pin, first and second threaded fasteners corresponding to the threaded upper longitudinal ends of the bushings, first and second sleeves that fit over the bushings, each of the sleeves having an upper longitudinal end with an inward radial extension that defines a reduced inner diameter and a lower longitudinal end that defines a catch (e.g. a notch) extending in a circumferential direction of the sleeve for engagement with a piano string, and a bridge configured to be sandwiched between the threaded fasteners and the inward radial extensions of the sleeves with the bushings disposed within the sleeves and the threaded fasteners fastened to the threaded upper longitudinal ends of the bushings.
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公开(公告)号：US11626090B1
公开(公告)日：2023-04-11
申请号：US17541696
申请日：2021-12-03
申请人： David Wish
发明人： David Wish
摘要： An adaptive equipment for playing chords on a musical instrument is provided. The apparatus can have a shell having an interior cavity. The adaptive equipment has a root pin partially installed within a root housing channel of a root housing, the root housing is fixedly installed within an interior cavity of the shell and is positioned toward the left side of the shell. The adaptive equipment has a fifth pin partially installed within a fifth housing channel of a fifth housing, the fifth housing is fixedly installed within the interior cavity of the shell and is positioned toward the right side of the shell. The adaptive equipment has a third pin partially installed within a third housing channel of a third housing, the third housing is movably installed within the interior cavity of the shell and is positioned between the root housing and the fifth housing. The root pin, the third pin and the fifth pin correspond to a major triad on a piano keyboard when the third housing is positioned closer to the fifth housing. The root pin, the third pin and the fifth pin correspond to a minor triad on the piano keyboard when the third housing is positioned closer to the root housing.
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公开(公告)号：US20230087303A1
公开(公告)日：2023-03-23
申请号：US18072983
申请日：2022-12-01
申请人： YAMAHA CORPORATION
摘要： A rotation mechanism includes a shaft portion, a bearing portion, a protruding portion, and a stopper. The bearing portion configured to rotate with respect to a predetermined axis as a center of rotation and configured to slide relative to an outer periphery of the shaft portion. The protruding portion protrudes from the shaft portion. The stopper is integrally formed the bearing portion. The stopper faces the protruding portion. A length of the protruding portion in a direction in which the protruding portion protrudes is larger than a distance from the center of rotation to a sliding portion where the bearing portion slides relative to the outer periphery of the shaft portion.
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公开(公告)号：US11508341B2
公开(公告)日：2022-11-22
申请号：US17406791
申请日：2021-08-19
发明人： Akihiro Suzuki
摘要： A keyboard device for a keyboard instrument, capable of largely reducing noise generated when a hammer contacts a lower limit stopper during key release immediately after key depression. The keyboard device includes a keyboard chassis disposed on a keybed, keys pivotally supported on the chassis, hammers pivotally supported on the chassis below the keys and each vertically pivotally moved, an intermediate rail mounted on the chassis below a rotational shaft of the hammers and its vicinity in a state floating from the keybed, and a lower limit stopper mounted on the intermediate rail, such that each hammer is placed thereon via its placement-contact portion when in a key-released state and contacts the same from above via the placement-contact portion when pivotally moving downward in accordance with key release after being moved upward by key depression, whereby further pivotal motion of the hammer is stopped.
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