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公开(公告)号：US06334745B1
公开(公告)日：2002-01-01
申请号：US09351371
申请日：1999-07-12
IPC分类号： B23C300
CPC分类号： B23Q39/024 , H05K3/0044 , H05K3/0047 , H05K3/043 , Y10T408/03 , Y10T408/378 , Y10T408/3844 , Y10T408/5612 , Y10T408/5617 , Y10T409/303808 , Y10T409/307 , Y10T409/307112 , Y10T409/307784 , Y10T409/309688
摘要： An apparatus for working on both sides of a flat workpiece includes a first support surface having a first axial line thereacross, a second support surface juxtaposed to and associated with the first support surface and having a second axial line thereacross which lies in a common plane with the first axial line, and a first carrying assembly operably connected to the first support surface in a manner to movably reciprocate along the first axial line and having a first extending arm which is laterally displaced from one side of the common plane and a second extending arm which is laterally displaced from another side of the common plane. A second carrying assembly is operably connected to the second support surface in a manner to movably reciprocate along the second axial line, wherein the second carrying assembly includes a workpiece removably mounted in a manner to position the workpiece in the common plane between the arms such that the arms extend about the workpiece. A tool is removably operably connected to either of the extending arms in a manner to permit the tool to perform work on a face of the workpiece.
摘要翻译： 一种用于在平坦工件的两侧工作的装置包括：第一支撑表面，其具有跨过第一轴线;第二支撑表面并置于第一支撑表面并与第一支撑表面相关联，并且具有位于公共平面中的第二轴线， 所述第一轴线和第一承载组件以可沿第一轴线可移动地往复运动的方式可操作地连接到第一支撑表面，并且具有第一延伸臂，该第一延伸臂从公共平面的一侧横向移位，第二延伸臂 其从公共平面的另一侧横向移位。 第二承载组件以沿着第二轴线可移动地往复运动的方式可操作地连接到第二支撑表面，其中第二承载组件包括可移除地安装的工件，以将工件定位在臂之间的共同平面中，使得 臂围绕工件延伸。 工具以可允许工具在工件的表面上执行工作的方式可移除地可操作地连接到任一个延伸臂。
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公开(公告)号：US4281579A
公开(公告)日：1981-08-04
申请号：US801729
申请日：1977-05-31
CPC分类号： G09B15/08
摘要： A teaching aid for piano and other keyed musical instruments. The device has switches electrically connected to a matrix array and mechanically linked to each key for detecting each key depression, an LED associated with each key for signalling the keys which should be played and an alphanumeric display for showing notes in literal and octave notation and for showing the student's position in a composition or exercise. The displays are connected in a matrix array and along with the key sensing switches are connected through interface circuitry to a microcomputer. The microcomputer stores a sequence of musical steps forming a composition and compares played notes to the stored sequence. When the compared notes and the depressed keys are identical, the student is signalled and the microcomputer advances to the next musical step. When there is an error, the microcomputer recycles the same musical step. An external, auxiliary memory, such as a cassette tape, may be used for storage of data representing a variety of musical compositions. Suitable programming permits the apparatus to be used for preparing and storing lessons, such as by the manual input at the instruments keyboard of additional musical compositions. Unique interface circuitry provides improved LED display, minimizes circuit components and permits the key sensing switches and the displays for an 88-key instrument to be linked to a modern microprocessor through only 13 input/output terminals, including only 8 terminals for data transfer and 5 for addressing and control.
摘要翻译： 钢琴和其他键控乐器的教学辅助。 该装置具有电连接到矩阵阵列并且机械地连接到每个键的开关，用于检测每个键按下，与每个键相关联的LED用于发信号通知应该播放的键和用于以文字和倍频程表示显示笔记的字母数字显示， 显示学生在组合或运动中的地位。 显示器以矩阵阵列连接，并且键传感开关通过接口电路连接到微型计算机。 微型计算机存储形成合成的一系列音乐步骤，并将播放的音符与存储的音序进行比较。 当比较的音符和按下的按键是相同的，学生被通知并且微型计算机前进到下一个音乐步骤。 当有错误时，微型计算机回收相同的音乐步骤。 诸如盒式磁带的外部辅助存储器可以用于存储表示各种音乐作品的数据。 合适的编程允许该装置用于准备和存储课程，例如通过乐器键盘上的手动输入附加的音乐作品。 独特的接口电路提供改进的LED显示，最小化电路组件，并允许键检测开关和88键仪器的显示器通过仅13个输入/输出端子链接到现代微处理器，仅包括8个用于数据传输的端子和5个 用于寻址和控制。
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