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    • 4. 发明申请
    • Firearm Sighting Device for Viewing Around Obstacles
    • 用于观察障碍物的枪支瞄准装置
    • US20070279623A1
    • 2007-12-06
    • US10595879
    • 2004-11-18
    • Thomas Chapman
    • Thomas Chapman
    • G02B27/32
    • F41G1/46
    • Viewing device (10) includes a body enclosing first reflective surface or mirror (40), second reflective surface or mirror (42) and a means for securing the body to conventional sighting device or telescope (82) on a firearm. First mirror (40) is adapted to direct incoming light beam (44) onto second mirror (42) so that outgoing light beam (70) is angled relative to incoming light beam (44). In use, viewing device (10) can be releasably attached to rear end (80) of telescope (82) and allows user (90) to remain partially hidden behind obstacle (92) whilst viewing through sighting device (82) and using the firearm. The angular offset of respective light beams (44, 70) is between 35° and 60°.
    • 观察装置(10)包括封闭第一反射表面或反射镜(40),第二反射表面或反射镜(42)的主体和用于将本体固定在火器上的传统瞄准装置或望远镜(82)的装置。 第一反射镜(40)适于将入射光束(44)引导到第二反射镜(42)上,使得出射光束(70)相对于入射光束(44)成角度。 在使用中,观察装置(10)可以可释放地附接到望远镜(82)的后端(80),并且允许使用者(90)保持部分地隐藏在障碍物(92)之后,同时通过瞄准装置(82)观察并使用枪支 。 各个光束(44,70)的角度偏移在35°和60°之间。
    • 7. 发明授权
    • Compact centrifugal blower with annular stator
    • 带环形定子的紧凑型离心式鼓风机
    • US06685430B2
    • 2004-02-03
    • US10092206
    • 2002-03-05
    • Thomas Chapman
    • Thomas Chapman
    • F04D2944
    • F04D29/282F04D17/165F04D25/06F04D25/0606F04D29/582
    • This invention is characterized by a very compact blower assembly architecture designed to operate at low Reynolds numbers. The assembly includes an impeller with forward-curved blades and a hub that is shaped to minimize the overall package volume of the assembly. The impeller is driven by a low-power, brushed, direct-current motor. A shroud part includes a generally cylindrical inlet that directs the air into the impeller, and a surface that forces the air leaving the impeller to turn from a generally radial and tangential direction to a generally axial and tangential direction. The shroud part directs the air into a single stage of stator blades that reduces the tangential component of the air velocity and produces a static pressure rise.
    • 本发明的特征在于设计成以低雷诺数操作的非常紧凑的鼓风机组件结构。 组件包括具有前弯曲叶片的叶轮和成形为使组件的整体包装体积最小化的轮毂。 叶轮由低功率,有刷直流电动机驱动。 护罩部分包括将空气引导到叶轮中的大致圆柱形的入口,以及迫使离开叶轮的空气从大致径向切线方向转动到大致轴向和切向的表面。 护罩部分将空气引导到单级定子叶片中,其减小空气速度的切向分量并产生静压力升高。