公开(公告)号：US4384505A

公开(公告)日：1983-05-24

申请号：US162540

申请日：1980-06-24

Applicant: Robert B. Cotton, Jr. ,  Dale M. Uetrecht ,  Russell L. Withington

Inventor： Robert B. Cotton, Jr. ,  Dale M. Uetrecht ,  Russell L. Withington

IPC: G10H1/10 ,  G10H1/02

CPC classification number: G10H1/10 ,  Y10S84/04

Abstract: A string chorus generator in an electronic musical instrument that accepts a single audio input signal, applies it to three separate delay lines, and provides delay modulated outputs to be used in producing an ensemble musical effect resembling a group of strings in a string orchestra. Each of the three delay line channels is identical and comprises an analog shift register driven by a high frequency voltage-controlled oscillator along with appropriate filters and buffers. The frequency of the voltage-controlled oscillator of each channel is controlled by the filtered output of a microprocessor, thereby providing precise control over the modulation of each voltage-controlled oscillator. The modulating waveshape is generated by using a lookup table within a microprocessor and comprises a sine wave of 6.25 Hz superimposed on another, larger amplitude, sine wave of 0.78 Hz. In order to provide an even chorus effect, in one embodiment period-proportional voltage controlled oscillators are used so that the high frequency modulation component of each waveshape has the same modulating effect on the audio signal at all times, regardless of the instantaneous amplitude of the low frequency modulation component. In another embodiment, the values stored in the lookup table are chosen so that distortion does not occur when frequency-proportional voltage-controlled oscillators are used.

Abstract translation: 电子乐器中的弦乐合唱发生器接受单个音频输入信号，将其应用于三个独立的延迟线，并提供延迟调制输出，用于产生类似弦乐团中的弦组的整体音乐效果。 三个延迟线通道中的每一个是相同的，并且包括由高频电压控制的振荡器以及适当的滤波器和缓冲器驱动的模拟移位寄存器。 每个通道的压控振荡器的频率由微处理器的滤波器输出控制，从而提供对每个压控振荡器的调制的精确控制。 通过使用微处理器内的查找表来产生调制波形，并且包括6.25Hz的正弦波叠加在0.78Hz的另一较大振幅正弦波上。 为了提供均匀的合唱效果，在一个实施例中，使用周期成比例的电压控制振荡器，使得每个波形的高频调制分量在所有时间对音频信号具有相同的调制效果，而不管 低频调制分量。 在另一个实施例中，选择存储在查找表中的值，使得当使用频率成比例的电压控制振荡器时不会发生失真。

公开(公告)号：US3958483A

公开(公告)日：1976-05-25

申请号：US519872

申请日：1974-11-01

Applicant: Alexander J. Borrevik ,  Robert B. Cotton, Jr. ,  Robert G. Mathias

Inventor： Alexander J. Borrevik ,  Robert B. Cotton, Jr. ,  Robert G. Mathias

IPC: G10H1/40 ,  G10H1/00 ,  G10H5/00

CPC classification number: G10H1/40 ,  G10H2210/346 ,  G10H2210/361 ,  Y10S84/12

Abstract: An automatic rhythm programmer for an electrical musical instrument which provides electrical pulses for actuating musical voice generators according to predetermined rhythmic patterns, having provision for introducing any one of several predetermined variations into any basic rhythmic pattern and for automatically changing from one variation to another at a preselected rate. The programmer comprises a master oscillator, a first counter and an electronic commutator which periodically pulse in sequence a series of address lines in an integrated circuit read-only memory, which also contains a separate series of tracks for each basic rhythmic pattern, each track being in circuit with certain of the address lines and energized at predetermined times therefrom, each track also being connected to certain of the voice generators and operable to provide actuating pulses thereto. In order to provide pattern variations, the read-only memory further contains a series of track variation lines, each corresponding to a particular pattern variation, which can be energized either manually or periodically in sequence by a variation counter at a preselected rate, each track variation line being in circuit with certain of the tracks and operable when energized to cancel or enable certain actuating pulses to the voice generators, whereby the rhythmic patterns developed at the voice generators are varied either manually or automatically according to the energization of the track variation lines.

Abstract translation: 一种用于电气乐器的自动节奏编程器，其根据预定的节奏模式提供用于启动音乐声音发生器的电脉冲，其具有将几个预定变体中的任何一个引入任何基本节奏模式并且用于在一个变化中自动地从 预选费率。 编程器包括主振荡器，第一计数器和电子换向器，其在集成电路只读存储器中依次周期性地脉冲一系列地址线，该存储器还包含用于每个基本节奏模式的单独的一系列轨道，每个轨道为 在某些地址线的电路中，并且在其预定时间被激励，每个轨道还连接到某些语音产生器并且可操作以向其提供致动脉冲。 为了提供图案变化，只读存储器还包含一系列轨迹变化线，每条轨迹变化线对应于特定图案变化，其可以通过预选速率的变化计数器手动地或周期性地被激励，每个轨道 变化线与某些轨道处于电路中，并且在通电时可操作以消除或使能到语音发生器的某些致动脉冲，由此根据轨道变化线的通电手动或自动地改变在语音发生器处产生的节律模式 。

公开(公告)号：US4449437A

公开(公告)日：1984-05-22

申请号：US304404

申请日：1981-09-21

Applicant: Robert B. Cotton, Jr. ,  Dale M. Uetrecht

Inventor： Robert B. Cotton, Jr. ,  Dale M. Uetrecht

IPC: G10H1/36 ,  G10H1/02 ,  G10H1/24 ,  G10H1/38 ,  G10H1/46 ,  G10H7/00

CPC classification number: G10H1/386 ,  G10H1/02 ,  G10H1/24 ,  Y10S84/22

Abstract: The present invention is an electronic piano that includes various "easy play" features that enable a person with little musical training to play the piano producing music similar to that of a skilled musician. The "easy play" feature automatically creates musical and rhythmic piano accompaniment patterns in response to playing either one key (One Finger Chord mode) or a chord (Funchords mode) with the left hand. The player plays the melody of the desired tune with the right hand. Instead of having to move the fingers of the left hand to play complex piano accompaniment patterns, as with a conventional piano, the player only needs to play a note or chord, and move the finger or fingers of the left hand to a different playing key or keys to change chords and patterns. In the standard piano mode, this instrument resembles an acoustic piano in function. The invention also includes a set of pushbutton switches which control the "easy play" features of the instrument. The features in the invention include: Funchords, One Finger Chord, Dynamic Pro Harmony, Harmony Dynamic Adjustment, Minor Touch Strip, Arpeggio Touch Strip, Style Selector, Style Expanders, Coupler, Manual Advance, Staccato, and Memory.

Abstract translation: 本发明是一种电子钢琴，其包括各种“轻松播放”功能，使得能够进行少量音乐训练的人弹奏类似于熟练音乐家的钢琴生产音乐。 “简易播放”功能可自动创建音乐和有节奏的钢琴伴奏模式，以响应用左手播放任意一个键（单指和弦模式）或和弦（Funchords模式）。 玩家用右手演奏所需乐曲的旋律。 与普通钢琴一样，不必移动左手的手指来播放复杂的钢琴伴奏图案，玩家只需要弹奏音符或和弦，并将左手的手指或手指移动到不同的播放键 或键来改变和弦和图案。 在标准钢琴模式下，该乐器类似于原声钢琴。 本发明还包括一组按钮开关，其控制仪器的“容易播放”特征。 本发明的特征包括：Funchords，One Finger Chord，Dynamic Pro Harmony，Harmony Dynamic Adjustment，Minor Touch Strip，Arpeggio Touch Strip，Style Selector，Style Expanders，Coupler，Manual Advance，Staccato和Memory。

公开(公告)号：US3558084A

公开(公告)日：1971-01-26

申请号：US3558084D

申请日：1968-06-05

Applicant: ROBERT B COTTON

Inventor： COTTON ROBERT B

IPC: B64F1/06 ,  F01D1/02 ,  F01D1/08

CPC classification number: F01D1/026 ,  B64F1/06 ,  F01D1/08

Abstract: A gas flow turbine for use in conjunction with a jet engine includes a series of radially disposed blades mounted about a periphery of a circular support wheel. The edges of the blades are substantially free of obstruction to minimize impediment to the flow of gas directed against them. This causes the turbine wheel to derive a substantial thrust from the gas flowing against it without materially impeding such flow. A convenient form of such turbine includes slightly curved blades centrally mounted in cantilever manner to a rotatable disc with their ends extending therefrom. Despite the minimal reaction imparted to the wheel by the gases, substantial energy is derived from the gases discharged from a jet engine without materially reducing the engine''s efficiency. The turbine''s energy may be advantageously utilized for a multitude of purposes including general augmentation of jet engine thrust, particularly for improving efficiency of launching thrust and auxiliary uses in conjunction with jet engine exhaust including electric power generation.