Speed maneuvering water craft and controls
    41.
    发明授权
    Speed maneuvering water craft and controls 失效
    高速机动水上工艺和控制

    公开(公告)号:US4641599A

    公开(公告)日:1987-02-10

    申请号:US771022

    申请日:1985-08-30

    摘要: A highly maneuverable water craft for recreational enthusiasts with two hydraulically controlled and driven reversible propellers directionally fixed to a toroidal peripheral hull section which encircles a thinner interior platform section. The toroidal exterior hull provides stability for the platform in water, allowing the water craft to quickly spin, translate, stop and start. The directionally fixed propellers are not impacted by translation or spin and provide rugged and simplified construction. Placement of two fixed reversible propellers on the peripheral hull section provides maximum turning torque and allows elimination of a rudder or directional actuators. Control is provided by a novel pilot actuator and four-way valves assembly. Bumper strips, propeller guards, handholds and deadman switches can be provided for safety in handling this extremely maneuverable water craft.

    摘要翻译: 一种用于娱乐爱好者的高度机动的水上工具,具有两个液压控制和驱动的可逆式螺旋桨,其定向地固定到环形外围船体部分,该环形外围船体部分环绕较薄的内部平台部分。 环形外部船体为水平台提供稳定性,允许水上飞机快速旋转,平移,停止和启动。 定向固定的螺旋桨不受平移或旋转影响,并提供坚固和简化的结构。 在外围船体部分放置两个固定的可逆式螺旋桨提供了最大的转向扭矩并允许消除舵或定向执行器。 控制由一个新的先导执行器和四通阀组件提供。 为了安全处理这种极其可操作的水上工艺,可以提供保险杠,螺旋桨防护装置,扶手和防盗开关。

    Acoustic detection of tool break events in machine tool operations
    42.
    发明授权
    Acoustic detection of tool break events in machine tool operations 失效
    机床操作中工具断裂事件的声学检测

    公开(公告)号:US4636779A

    公开(公告)日:1987-01-13

    申请号:US664189

    申请日:1984-10-24

    摘要: A system and method for monitoring vibrations of a cutting tool produced by tool break events, and for interpreting them to detect tool breaks of sufficient magnitude to endanger the machined part. The signal generated by a sensor such as an accelerometer is preprocessed to attenuate low frequency machining noise and detect the energy in a higher frequency band, then sampled, and the digitized signal samples analyzed by tool break detection logic. This logic is triggered by a positive-going signal transient, and prevents false alarms on minor tool break events that do not mar the workpiece and on noise from other sources.

    摘要翻译: 一种用于监测通过工具断裂事件产生的切削工具的振动的系统和方法,并且用于解释它们以检测足够大的刀具断裂以危及加工零件。 由诸如加速度计的传感器产生的信号被预处理以衰减低频加工噪声并且检测更高频带中的能量,然后进行采样,并且通过刀具断裂检测逻辑分析数字化信号样本。 该逻辑由正向信号瞬态触发,并且防止不损坏工件和来自其他源的噪声的次要工具断裂事件的虚假警报。