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    • 22. 发明授权
    • Can opener
    • 开罐器
    • US4136448A
    • 1979-01-30
    • US707707
    • 1976-07-22
    • Erick-Pierre FournierEthel V. Hill
    • Erick-Pierre FournierEthel V. Hill
    • B67B7/50B67B7/24
    • B67B7/24
    • A sealable edged aperture is produced in a can top by a generally triangular shaped cutting element which severs a flap-like portion from the can top. The cutting element also includes a wedging structure for folding a portion of the severed flap into abutting relationship with the underside of the can top to provide a discrete seal edge on the aperture. The cutting element is carried on a lever arm which is pivotally attached to a manually grippable element positioned adjacent the can sidewall. A bridging element is also provided at the pivot point to support the opener in the can.
    • 通过大致三角形的切割元件在罐头顶部产生可密封的边缘孔,该切割元件从罐顶部切除翼状部分。 切割元件还包括楔形结构,用于将切割的翼片的一部分折叠成与罐顶部的下侧成邻接关系,以在孔上提供离散的密封边缘。 切割元件承载在杠杆臂上,杠杆臂枢转地附接到邻近罐侧壁定位的可手动抓握元件。 在枢轴点处还提供桥接元件以支撑罐中的开启器。
    • 28. 发明授权
    • Polyphonic note detection
    • 复音笔记检测
    • US08309834B2
    • 2012-11-13
    • US12758675
    • 2010-04-12
    • Steffen GehringMarkus SappPierre Fournier
    • Steffen GehringMarkus SappPierre Fournier
    • G10H1/38
    • G10H1/383G10H2210/066G10H2220/091G10H2250/235
    • Processor-implemented methods and systems for polyphonic note detection are disclosed. The method includes converting a portion of a polyphonic audio signal from a time domain to a frequency domain. The method includes detecting a fundamental frequency peak in the frequency domain. The method then detects a defined number of integer-interval harmonic partials. If a defined number of integer-interval harmonic partials relative to the fundamental frequency peak are detected the fundamental frequency is recorded as a detected note. This process is repeated for each fundamental frequency until each note in the polyphonic audio signal has been detected. For example, this method allows detection of each note in a strummed guitar chord to provide feedback on the tuning of each string in a strummed chord or allows detection and feedback of the timing and pitch errors for guitar chords played along with a reference track.
    • 公开了用于复音音符检测的处理器实现的方法和系统。 该方法包括将来自时域的多音音频信号的一部分转换为频域。 该方法包括检测频域中的基频峰值。 该方法然后检测定义数量的整数间隔谐波分量。 如果检测到相对于基频峰值的定义数量的整数间隔谐波部分,则将基频记录为检测到的音符。 对于每个基本频率重复该过程,直到已经检测到复音音频信号中的每个音符。 例如,该方法允许检测吉他弦中的每个音符,以提供对弦弦中的每个弦的调谐的反馈,或允许检测和反馈与参考轨道一起播放的吉他和弦的定时和俯仰误差。