公开(公告)号：US4872190A

公开(公告)日：1989-10-03

申请号：US298339

申请日：1989-01-13

申请人： Mark Stojkov ,  Patrick M. Flanagan ,  Victor Hrdlicka ,  John Geither ,  Dennis Everett

发明人： Mark Stojkov ,  Patrick M. Flanagan ,  Victor Hrdlicka ,  John Geither ,  Dennis Everett

IPC分类号： G03B42/02

CPC分类号： G03B42/025

摘要： A system and method is disclosed for minimizing residual vibration of a radiographic system due to rapid movement of a radiographic film cassette between a park and expose position. The cassette is moved by a servo system including a servo motor which is responsive to a voltage input waveform to drive the cassette. A waveform is chosen for the voltage input such that no impulse derivatives appear until the waveform has been differentiated at least three times. The primary natural resonant frequency of the system is determined and noted. The duration of the selected input waveform is adjusted such that the frequency spectrum of the adjusted input waveform defines a relative null which approximately coincides with the primary resonant frequency. The amplitude of the voltage input waveform is then further adjusted as a function of the distance to be traveled by the cassette between the park and expose positions. The servo system can optionally be operated over a portion of the cassette transit in a closed loop fashion. In a mechanical embodiment, sinusoidal cassette acceleration can be effected by the use of a mechanical drive linkage coupled between a motor and the cassette, the drive linkage employing a cycloidal cam and associated cam follower to govern the profile of cassette movement.

摘要翻译： 公开了一种用于使放射线照相系统的残余振动由于放映照相胶片暗盒在公园和曝光位置之间的快速移动而被最小化的系统和方法。 盒式磁带由包括伺服电机的伺服系统移动，伺服电机响应于电压输入波形来驱动盒。 为电压输入选择一个波形，使波形不会出现，直到波形至少三分之一为止。 确定并记录系统的主要自然共振频率。 调整所选择的输入波形的持续时间，使得经调整的输入波形的频谱定义与初级谐振频率大致一致的相对零点。 电压输入波形的幅度随着进一步的调整，作为由公园和曝光位置之间的磁带行进的距离的函数。 伺服系统可以可选地以闭环方式在盒的一部分上运行。 在机械实施例中，可以通过使用耦合在电动机和盒之间的机械驱动联动装置来实现正弦盒式加速，驱动联动装置采用摆线凸轮和相关联的凸轮从动件来控制磁带盒运动的轮廓。

公开(公告)号：US4926455A

公开(公告)日：1990-05-15

申请号：US339891

申请日：1989-04-17

申请人： Mark Stojkov ,  Patrick M. Flanagan ,  Victor Hrdlicka ,  John Geither ,  Dennis Everett

发明人： Mark Stojkov ,  Patrick M. Flanagan ,  Victor Hrdlicka ,  John Geither ,  Dennis Everett

IPC分类号： G03B42/02

CPC分类号： G03B42/025

摘要： A system and method is disclosed for minimizing residual vibration of a radiographic system due to rapid movement of a radiographic film cassette between a park and expose position. The cassette is moved by a servo system including a servo motor which is responsive to a voltage input waveform to drive the cassette. A waveform is chosen for the voltage input such that no inpulse derivatives appear until the waveform has been diferentiated at least three times. The primary natural resonant frequency of the system is determined and noted. The duration of the selected input waveform is adjusted such that the frequency spectrum of the adjusted input waveform defines a relative null which approximately coincides with the primary resonant frequency. The amplitude of the voltage input waveform is then further adjusted as a function of the distance to be traveled by the cassette between the park and expose positions. The servo system can optionally be operated over a portion of the cassette transit in a closed loop fashion. In a mechanical embodiment, sinusoidal cassette acceleration can be effected by the use of a mechanical drive linkage coupled between a motor and the cassette, the drive linkage employing a cycloidal cam and associated cam follower to govern the profile of cassette movement.

摘要翻译： 公开了一种用于使放射线照相系统的残余振动由于放映照相胶片暗盒在公园和曝光位置之间的快速移动而被最小化的系统和方法。 盒式磁带由包括伺服电机的伺服系统移动，伺服电机响应于电压输入波形来驱动盒。 为电压输入选择一个波形，使波形不会出现至少三次，直到波形出现。 确定并记录系统的主要自然共振频率。 调整所选择的输入波形的持续时间，使得经调整的输入波形的频谱定义与初级谐振频率大致一致的相对零点。 电压输入波形的幅度随着进一步的调整，作为由公园和曝光位置之间的磁带行进的距离的函数。 伺服系统可以可选地以闭环方式在盒的一部分上运行。 在机械实施例中，可以通过使用耦合在电动机和盒之间的机械驱动联动装置来实现正弦盒式加速，驱动联动装置采用摆线凸轮和相关联的凸轮从动件来控制磁带盒运动的轮廓。

公开(公告)号：US5178566A

公开(公告)日：1993-01-12

申请号：US537060

申请日：1990-06-12

申请人： Mark Stojkov ,  John T. Venaleck ,  Carl W. Rose, Jr. ,  Charles R. Anspach ,  Park French ,  James A. Bacnik ,  John E. Hartman

发明人： Mark Stojkov ,  John T. Venaleck ,  Carl W. Rose, Jr. ,  Charles R. Anspach ,  Park French ,  James A. Bacnik ,  John E. Hartman

IPC分类号： B63H20/22 ,  B63H23/02 ,  F16H7/02 ,  F16H57/05

CPC分类号： F16H7/023 ,  B63H21/28 ,  F16H57/05 ,  B63H2020/326 ,  B63H2023/0216

摘要： An outdrive system for watercraft includes use of plastic or other relatively flexible material, e.g., compared to metal, especially as a housing material, and techniques which enable and/or at least facilitate use of such housing material. One of those techniques employs a flexible member, such as a belt, to couple power between the input and output of an outdrive and another employs a cooling system to remove heat. The invention also relates to use in a vehicle drive, especially for watercraft, of housing materials that are not subject to corrosion, galvanic action and the like.

摘要翻译： 用于船舶的超速系统包括使用塑料或其它相对柔性的材料，例如与金属（特别是作为外壳材料）相比，以及使得和/或至少有利于使用这种外壳材料的技术。 这些技术中的一种采用柔性构件，例如带，以在输出和输出之间耦合功率，另外采用冷却系统来去除热量。 本发明还涉及在不受腐蚀，电动作用等的外壳材料的车辆驱动器中，特别是用于船舶的应用中。