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1. 发明授权

US4373418A Tuning fork mounting assembly in electromechanical pianos 失效
标题翻译：调谐叉安装组件在机电钢琴
公开(公告)号：US4373418A
公开(公告)日：1983-02-15
申请号：US223777
申请日：1981-01-09
申请人： Harold B. Rhodes , Steven J. Woodyard
发明人： Harold B. Rhodes , Steven J. Woodyard
IPC分类号： G10D13/08 , G10H3/20 , G10H3/00
CPC分类号： G10D13/085 , G10H3/20
摘要： An electromechanical piano of the type incorporating asymmetrical tuning forks. To increase vastly the dwell of the forks in the high-pitched range of the piano, a fork-mounting construction is employed wherein only a single screw is associated with each fork. Elastomeric means are provided around each screw and also between opposed edge surfaces of adjacent forks, whereby to prevent rotation of each fork about the axis of its associated mounting screw.
摘要翻译：一种包含不对称调音叉的机电钢琴。为了大大增加在钢琴高调范围内的叉子的驻留，采用叉式安装结构，其中只有单个螺丝与每个叉相关联。弹性装置设置在每个螺钉周围并且还设置在相邻叉的相对的边缘表面之间，由此防止每个叉绕其相关联的安装螺钉的轴线旋转。

2. 外观设计

USD267495S Harp cover 失效
公开(公告)号：USD267495S
公开(公告)日：1983-01-04
申请号：US194770
申请日：1980-10-07
申请人： Harold B. Rhodes
设计人： Harold B. Rhodes

3. 发明授权

US4338848A Piano action 失效
标题翻译：钢琴动作
公开(公告)号：US4338848A
公开(公告)日：1982-07-13
申请号：US161658
申请日：1980-06-23
申请人： Harold B. Rhodes
发明人： Harold B. Rhodes
IPC分类号： G10C3/16 , G10H1/34 , G10H3/20 , G10C3/18
CPC分类号： G10H3/20 , G10H1/344
摘要： An action is described for musical instruments of the piano type. Means are included for braking and restraining each hammer of the action to prevent bouncing, rebounding, or other undesired movement, when the key is depressed and the hammer is positioned at the escapement distance from the tone generating tine and also when the key is released and the hammer is at rest position. The braking and restraining means move arcuately in cooperation with the key to exert a wedging force against a portion of the head of the hammer to brake and restrain it in the desired positions.
摘要翻译：对钢琴类型的乐器描述了一个动作。包括用于制动和限制每个锤的动作以防止弹跳，弹回或其他不期望的运动的手段，当钥匙被按下并且锤被定位在离乐音发生尖端的擒纵距离处，并且当钥匙被释放时，锤子处于静止位置。制动和限制装置与钥匙协同地弓形地移动，以对锤的头部的一部分施加楔入力以制动并将其约束在期望的位置。

4. 发明授权

US4342246A Multiple voice electric piano and method 失效
标题翻译：多声电钢琴和方法
公开(公告)号：US4342246A
公开(公告)日：1982-08-03
申请号：US162487
申请日：1980-06-24
申请人： Harold B. Rhodes , James B. Murphy
发明人： Harold B. Rhodes , James B. Murphy
IPC分类号： G10H1/057 , G10H3/16 , G10H3/20 , G10H3/00
CPC分类号： G10H3/20
摘要： An electric piano has a complete player actuated piano voice of which harmonics are basically controlled by a tuning fork that is struck by the piano key. The piano is also provided with an electronically generated voice of which harmonics are electronically generated. To better enable the two voices to be played simultaneously by striking a single piano key, the amplitude envelope of the electromechanically generated piano voice is imposed upon the electronically generated voice which is gated and amplitude modulated so as to be heard in precise synchronization with a piano note produced by the instrument player. Linearity of modulation is extended to low piano voice amplitudes by use of modulating and gating diodes in oppositely poled feedback paths of an operational amplifier.
摘要翻译：电钢琴具有完整的播放器激活的钢琴声音，其谐波基本上由被钢琴键敲击的音叉控制。钢琴还具有以电子方式生成谐波的电子产生声音。为了更好地使两个声音通过敲击单个钢琴键同时播放，机电产生的钢琴声音的幅度包络被施加在门控和幅度调制的电子产生的声音上，以便与钢琴精确同步地听到由乐器演奏者制作的音符。通过使用运算放大器的相反极化反馈路径中的调制和门控二极管，将调制线性扩展到低钢琴声音幅度。

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