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    • 41. 发明授权
    • Adjustable pin for friction stir welding tool
    • 用于摩擦搅拌焊接工具的可调节销
    • US5697544A
    • 1997-12-16
    • US620060
    • 1996-03-21
    • Donald H. Wykes
    • Donald H. Wykes
    • B23K20/12
    • B23K20/125
    • A stir friction welding tool with a variable length pin relative to the shank of the tool is disclosed. The pin is moveable from a totally retracted position relative to the shank such that the shank may engage a workpiece without the pin engaging the workpiece. The pin then may be slowly extended into the work piece. The stir friction welding tool may also have a variable diameter shank to provide a variable volume cavity. Then as the pin is extended further into the workpiece the variable width shank can expand to increase the circumference of the shoulder and the volume of the cavity in the shank such that the pin length to cavity volume are within a range to insure a good surface material flow and a high weld quality using the stir friction welding process.
    • 公开了一种具有相对于工具的柄的可变长度销的搅拌摩擦焊接工具。 销可以相对于柄部从完全缩回位置移动,使得柄可以接合工件,而销不与工件接合。 然后,该销可以缓慢地延伸到工件中。 搅拌摩擦焊接工具还可以具有可变直径柄,以提供可变体积腔。 然后当销进一步延伸到工件中时,可变宽度柄可以膨胀以增加肩部的周长和柄部中的腔的体积,使得销的长度与腔体积在一定范围内以确保良好的表面材料 流动和焊接质量高的搅拌摩擦焊接工艺。
    • 42. 发明授权
    • Radar detection and classification of helicopters
    • 直升机的雷达检测和分类
    • US5689268A
    • 1997-11-18
    • US691729
    • 1996-08-02
    • Nai K. ShiHenry F. Williams
    • Nai K. ShiHenry F. Williams
    • G01S7/41G01S13/52
    • G01S7/415
    • The blade flash signature in a radar return is enhanced and used to detect and classify helicopter targets. The radar return of a target is fast Fourier transformed 34, and the frequencies corresponding to DC and the body of the target are filtered out 38. The filtered signal is inverse transformed 44, moving averaged 52, and auto-correlated 54. Auto-correlation 54 may take place in the frequency domain. If there are significant peaks in the auto-correlation output (other than at zero time delay), then a helicopter is present. The time delay between peaks is the period of the blade. The height of the peak indicates whether it is the main blade or the tail blade which has been detected, and allows a signal indicating both periods to be output. The main blade period and the ratio of the period to that of the tail blade can be compared with a data base to classify the helicopter.
    • 雷达回波中的闪光灯签名被增强,用于检测和分类直升机目标。 目标的雷达返回是快速傅立叶变换34,并且对应于DC和目标身体的频率被滤除38.滤波的信号被逆变换44,移动平均52和自相关54.自相关 54可能在频域中发生。 如果在自相关输出中有明显的峰值(除了零时间延迟),则存在直升机。 峰值之间的时间延迟是叶片的周期。 峰值的高度表示是否已经被检测到的主叶片或尾叶片,并且允许指示两个周期的信号被输出。 可以将主叶片期间和尾桨的周期与数据库进行比较,对直升机进行分类。
    • 44. 发明授权
    • Optics assembly for observing a panoramic scene
    • 用于观察全景场景的光学组件
    • US5627675A
    • 1997-05-06
    • US455885
    • 1995-05-13
    • John E. DavisMarion N. ToddMitchell RudaTilman W. StuhlingerKenneth R. Castle
    • John E. DavisMarion N. ToddMitchell RudaTilman W. StuhlingerKenneth R. Castle
    • G02B13/06G02B17/06G02B17/08G02B17/00
    • G02B13/06
    • An optics assembly for observing a panoramic scene. The optics assembly includes a plurality of optical elements. A first element redirects light from the panoramic scene. The optical power of the first element forms an imaginary pupil. The energy from the first element is redirected about 90 degrees, forming an annular path. A second element receives the redirected light and re-images the imaginary pupil to form a real pupil. This portion of the energy continues to be in an annular form. A third element includes an optical relay system having a group of reimaging optics. The third element receives light from the second element while relaying the real pupil into the reimaging optics. It also establishes the focal length of the optics assembly, corrects pupil aberrations produced at the real pupil, corrects field aberrations and produces an annular image on a flat focal plane. The optical relay system interfaces with the second element through the use of the real pupil. The real pupil is formed at the cold stop and filter location in the third element. This pupil is relayed back through the system to be coincident with the first real pupil. The optics assembly produces a small F-number at field angles near perpendicular to the output optical axis of the optics assembly over a panoramic scene.
    • 用于观察全景场景的光学组件。 光学组件包括多个光学元件。 第一个元素重定向来自全景场景的光。 第一元件的光学功率形成假想光瞳。 来自第一元件的能量被重定向大约90度,形成环形路径。 第二个元件接收重定向的光并重新映射虚拟的光瞳以形成真正的光瞳。 能量的这一部分继续呈环状。 第三元件包括具有一组再成像光学器件的光学继电器系统。 第三元件从第二元件接收光,同时将真实光瞳中继到重构成像光学元件中。 它还建立光学组件的焦距,校正在真实光瞳处产生的光瞳像差,校正场像差并在平坦焦平面上产生环形图像。 光学继电器系统通过使用真实光瞳与第二个元件相连接。 真正的瞳孔形成在第三个元件的冷停止和过滤器位置。 这个学生通过系统被传回来与第一个真正的学生一致。 光学组件在垂直于光学组件的输出光轴的场角上在全景场景上产生小的F数。
    • 45. 发明授权
    • Structural joint to accomodate large thermally-induced displacements
    • 结构接头适应大的热诱导位移
    • US6042055A
    • 2000-03-28
    • US994798
    • 1997-12-19
    • Ross H. Messinger
    • Ross H. Messinger
    • B64C1/00B64C1/06B64C1/12
    • B64C3/185B64C1/38B64D37/06B64D37/30B64C2001/0072Y02T50/433Y02T50/44Y10T403/21
    • A thermal expansion joint having a plurality of bendable tabs which flex to minimize the stress caused by thermal expansion. The tabs flex at their slot radii by the base of the tabs, allowing the tip of the tabs to move. Apertures in the tabs near the tip connect the tabs to a solid body or to tabs on another body. The tabs' flexing relieves stress in the body undergoing thermal expansion at the point it is connected to a body which has a different thermal expansion rate and/or experiences a different temperature. A plurality of tabs so connecting two bodies provides a stiff joint and reduces the thickness of the material otherwise needed to provide a connection what will not crack or otherwise break due to thermal strains at the connection between two bodies.
    • 一种热膨胀接头,其具有多个可弯曲的接头,其弯曲以使由热膨胀引起的应力最小化。 突出部分在突出部的基部处以其槽半径弯曲,允许突出部的尖端移动。 靠近尖端的接头中的孔径将突片连接到固体或者在另一个身体上的突出部。 翼片的弯曲减轻了身体中经受热膨胀的应力,该应力连接到具有不同热膨胀率和/或经历不同温度的主体。 连接两个主体的多个突片提供了一个刚性关节,并减小了材料的厚度,否则需要提供连接,由于两个主体之间的连接处的热应变,不会破裂或以其他方式破裂。
    • 46. 发明授权
    • Salt free lithium hydroxide base for chemical oxygen iodine lasers
    • 无碱氢氧化锂碱为化学氧碘激光
    • US6010640A
    • 2000-01-04
    • US680762
    • 1996-07-15
    • David G. BeshoreDavid Stelman
    • David G. BeshoreDavid Stelman
    • C01B15/01C01B15/043C01D15/02H01S3/22C01D1/04C01B13/00
    • C01B15/0435H01S3/2215
    • Basic hydrogen peroxide used in chemical oxygen lasers can be produced using a lithium based lithium hydroxide with a lithium hydroxide makeup of the reacted basic hydrogen peroxide. Lithium hydroxide, water and hydrogen peroxide are mixed and 1) passed over a lithium hydroxide solid bed or 2) premixed with small particulate solid lithium hydroxide or lithium hydroxide monohydrate. The basic hydrogen peroxide produced is chilled and stored cold until mixed with chlorine to produce singlet delta oxygen for use in the chemical oxygen iodine laser. The spent basic hydrogen peroxide is rejuvenated by passing it over a solid lithium hydroxide or in-situ solid particulate lithium hydroxides. After dissolution, the rejuvenated basic hydrogen peroxide is then reacted with chlorine to produce more singlet delta oxygen.
    • 用于化学氧激光器的碱性过氧化氢可以使用锂基氢氧化锂与氢氧化锂组成反应的碱式过氧化氢来制备。 将氢氧化锂,水和过氧化氢混合,并且1)通过氢氧化锂固体床或2)与小颗粒固体氢氧化锂或氢氧化锂一水合物预混合。 所生产的碱性过氧化氢被冷却并储存冷,直到与氯混合以产生用于化学氧碘激光器的单重态三氧化二氮。 废碱性过氧化氢通过将其通过固体氢氧化锂或原位固体颗粒状氢氧化锂而再生。 溶解后,再生的碱性过氧化氢然后与氯反应产生更多的单重态三氧化碳。
    • 50. 发明授权
    • Fiber optic
    • 光纤“T”耦合器调制器
    • US5883993A
    • 1999-03-16
    • US842309
    • 1997-04-24
    • James L. Peck, Jr.
    • James L. Peck, Jr.
    • G02B6/26
    • G02B6/264
    • This invention relates to modulating light transmitted in an optic fiber. A passive light modulating device such as a polarizing material, a filter, or an attenuator is placed between two facing collimated ends of GRIN lenses attached to two optic fibers. The passive light modulating device modulates the light in the desired manner as it is transmitted between the two optic fibers. An active light modulating device such as a switch or an amplifier may also be used between the two GRIN lenses to actively modify the transmitted light.
    • 本发明涉及调制在光纤中传输的光。 诸如偏振材料,滤光器或衰减器之类的被动光调制装置被放置在连接到两个光纤的GRIN透镜的两个相对的准直端之间。 无源光调制装置在两个光纤之间传输时以所需的方式调制光。 也可以在两个GRIN透镜之间使用诸如开关或放大器的有源光调制装置来主动地修改透射光。