公开(公告)号：US6040580A

公开(公告)日：2000-03-21

申请号：US008848

申请日：1998-01-19

申请人： Charles C. Watson ,  William F. Jones

发明人： Charles C. Watson ,  William F. Jones

IPC分类号： G01T1/29 ,  G01T1/166

CPC分类号： G01T1/1615 ,  A61B6/037 ,  G01T1/1611 ,  G01T1/2985

摘要： A method and apparatus for producing radioactive transmission measurements to form multi-dimensional attenuation correction data with a point source of radiation, such as required in positron emission tomography applications. This involves the passing of the point source proximate the face of each of the tomograph units for the formation of a 3-D image, or a selected portion of the tomograph units for a 2-D image. As such, attenuation data, transmission data, detector performance data, etc., can be obtained. This point source of radiation, in one embodiment, is rapidly circulated through a conduit that passes across each detector face under the influence of a transport fluid in, for example, an oscillatory motion to achieve a selected radiation field whereby calculation of transmission measurements within a body positioned within the tomograph scanner is achieved. When not being circulated, the radiation source is held within a shield. In another embodiment, the point source is a CT device. In a further embodiment, a single photon source is used in association with an ECAT ART having two oppositely disposed detector banks. One point source is provided for association with each detector bank. Each point source is capable of axial movement with respect to the detector banks, with the entire apparatus including the detector banks and the point sources being rotatable. Collimators are provided for each point source, the collimators and the point source being fixed with respect to each other, thus reducing the effects of dead-time during a transmission scan typically caused by the point source moving behind a collimator.

摘要翻译： 用于产生放射性透射测量以用诸如正电子发射断层摄影应用中所需的点辐射源形成多维衰减校正数据的方法和装置。 这涉及靠近每个断层摄影机单元的面的点源，以形成3-D图像，或者用于2-D图像的断层摄影单元的选定部分。 因此，可以获得衰减数据，传输数据，检测器性能数据等。 在一个实施例中，该点辐射源通过例如在振荡运动中的输送流体的影响下穿过每个检测器面的导管快速循环，以实现所选择的辐射场，从而计算在 实现了位于层析扫描仪内的身体。 当不被循环时，辐射源被保持在屏蔽内。 在另一个实施例中，点源是CT装置。 在另一个实施例中，单个光子源与具有两个相对布置的检测器组的ECAT ART一起使用。 一点源被提供用于与每个检测器组相关联。 每个点源能够相对于检测器组轴向运动，整个设备包括检测器组和点源可旋转。 为每个点源提供准直器，准直器和点源相对于彼此固定，从而减少通常由点源在准直仪后面移动的透射扫描期间死区时间的影响。

公开(公告)号：US5715879A

公开(公告)日：1998-02-10

申请号：US679585

申请日：1996-07-15

申请人： William F. Jones

发明人： William F. Jones

IPC分类号： B27L5/02

CPC分类号： B27L5/025

摘要： A veneer lathe is disclosed having a nose bar and drive assembly in place thereon. A nose bar shaft is splined lengthwise and supported by lathe mounted bearing assemblies. Rolls include splined inserts for shaft engagement. Roll surfaces are grooved for biased engagement with a wooden article installed in the lathe. Drive members are insertably engaged with ends of the nose bar shaft and with power transmission units in place on the veneer lathe. The drive members are disengaged from the nose bar shaft upon positioning of retainer caps on each power transmission unit.

摘要翻译： 公开了一种单板车床，其上具有鼻杆和驱动组件。 鼻杆轴纵向花键并由车床安装的轴承组件支撑。 卷筒包括用于轴接合的花键插入件。 辊表面是开槽的，用于与安装在车床中的木制品进行偏压接合。 驱动构件可插入地与鼻杆轴的端部接合，并且动力传递单元就位于单板车床上。 在每个动力传递单元上定位盖帽时，驱动构件与鼻杆轴脱离。

公开(公告)号：US4909818A

公开(公告)日：1990-03-20

申请号：US271826

申请日：1988-11-16

申请人： William F. Jones

发明人： William F. Jones

IPC分类号： A61F2/16 ,  B29D11/00 ,  G02B5/18 ,  G02C7/04

CPC分类号： G02C7/04 ,  B29D11/00461 ,  G02B5/1876 ,  G02B5/1895 ,  G02C7/042 ,  G02C7/044 ,  A61F2/1654 ,  G02C2202/20

摘要： A diffractive bifocal eye lens, an otpical system, and processes for fabrication of such lenses are disclosed. The optical system includes the following principal elements in optical alignment along an optical axis, for accomplishing the indicated steps of the process: a laser for emission of ultraviolet light along the optical axis; a zone plate mask in the path of irradiation by the laser; and an imaging lens to project, with radiation from the laser, an image of the mask on the concave inner surface of an eye lens mounted coincident with the image surface of the optical system, thereby ablating the eye lens imagewise of the mask to generate a phase zone plate on the eye lens. The laser beam scans the zone plate mask to generate a composite image on the image surface. Alternatively, the phase zone plate is generated on the concave surface of a glass blank at the image surface to form a tool from which molds, and in turn lenses, are replicated. The light source is an argon fluoride excimer laser, emitting at 193 nm. The lens is a variable magnification lens to project various size images of the mask for producing zone plates of various powers as desired.

公开(公告)号：US4094367A

公开(公告)日：1978-06-13

申请号：US769032

申请日：1977-02-16

申请人： William F. Jones ,  Gerald J. Hochberger

发明人： William F. Jones ,  Gerald J. Hochberger

IPC分类号： G01G19/04

CPC分类号： G01G19/047 ,  Y10S177/08

摘要： A system is provided for weighing railroad cars coupled in motion by providing a first scale and a second scale located forward of the first scale. The railroad cars are moved over the first and second scales, the rear trucks of the railroad cars are weighed on the first scale and the weight is stored. While the rear truck of a railroad car under consideration is on the first scale, the front truck of the railroad car under consideration plus the rear truck of the just preceding railroad car are weighed on the second scale. The weights on the first and second scales are totaled and the stored weight of the rear truck of the just preceding railroad car is subtracted to obtain the full draft weight of the railroad car under consideration.The railroad car under consideration may be loaded while it is being weighed and in motion. A preload compensating amount is added to the totaled weights on the first and second scales to compensate for the weight of material that will continue through the chute after the chute is closed. A plurality of discrete weighings is performed during loading of the railroad car under consideration. After the loading is terminated, a final weight reading is performed to obtain the full draft weight of the loaded car under consideration. Loading of the railroad car is terminated when either the full draft weight reaches a predetermined amount or when the rear truck of the railroad car under consideration reaches a preselected location on the first scale.

摘要翻译： 提供一种系统，用于通过提供位于第一标尺前方的第一刻度和第二刻度来称重运动中耦合的铁路车辆。 铁路车辆在第一和第二秤上移动，铁路车辆的后部卡车在第一秤上称重，并且重量被储存。 在所考虑的铁路车辆的后方车辆处于第一级时，所考虑的铁路车辆的前叉车和前一铁路车辆的后部卡车在第二级称重。 共计第一和第二秤上的重物，减去前一辆铁路车辆的后车的存放重量，以获得所考虑的铁路车辆的全速度。