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    • 8. 发明申请
    • High stability double oven crystal oscillator
    • 高稳定性双炉晶体振荡器
    • US20060192626A1
    • 2006-08-31
    • US11362649
    • 2006-02-25
    • Bryan MillirenRoger Clark
    • Bryan MillirenRoger Clark
    • H03B5/32
    • H03B5/04H03B5/366H03L1/04
    • A double oven crystal oscillator (DOCXO) is disclosed which is highly stable by incorporating means to reduce the effects of ambient pressure changes on the frequency of the oscillator. The oscillator crystal is mounted in a temperature controlled inner oven to reduce the effects on the frequency stability of the oscillator. The oscillator circuitry and all circuitry associated with the inner oven is mounted in good thermal contact with the inner oven. A Faraday shield at ground potential is placed over the oscillator circuitry to minimize the effects of stray capacitance between the oscillator components and the case wall of the inner oven. The effects of minor deformations in the case walls within the oscillator caused by ambient pressure changes and other factors causing pressure changes are thereby greatly minimized. To further reduce effects on oscillator frequency stability the ovens of the DOCXO are temperature controlled, cases are hermetically sealed, the case walls are rigid, and ovens and cases may be evacuated.
    • 公开了一种双炉晶体振荡器(DOCXO),其通过并入降低环境压力变化对振荡器频率的影响的方法而具有高度的稳定性。 振荡器晶体安装在温度控制的内部烘箱中,以减少对振荡器的频率稳定性的影响。 振荡器电路和与内部烘箱相关的所有电路与内部烘箱良好的热接触。 接地电位的法拉第屏蔽放置在振荡器电路上,以最小化振荡器部件与内部烘箱的壳体壁之间的杂散电容的影响。 由环境压力变化引起的振荡器外壳壁内的微小变形和导致压力变化的其他因素的影响因此大大降低。 为了进一步减少对振荡器频率稳定性的影响,DOCXO的炉子是温度控制的,壳体被气密密封,壳体壁是刚性的,并且炉子和壳体可能被排空。
    • 9. 发明授权
    • Mechanic's support pillow
    • 机械师的支持枕头
    • US4951337A
    • 1990-08-28
    • US182126
    • 1988-04-15
    • Harold L. HullRoger Clark
    • Harold L. HullRoger Clark
    • A42B1/24A47C16/00
    • A42B1/24A47C7/383
    • A pillow designed and adapted to cover the back portion of a user's head such as a mechanic or workman, said pillow being secured to user's head by means of an elastic or adjustable strap thereby freeing up the use of both of the user's hands when the user is moving about on his back beneath a vehicle or the like, with the filling of the pillow being removable to facilitate the cleaning or washing of the pillow cover and strap, and with the section of the pillow which lays adjacent to the user's head containing means to attach a cap to cover the user's head which cap may also be provided with a visor or the like to protect the eyes of the user.
    • 设计并适于覆盖使用者头部的后部的枕头,例如机械师或工人,所述枕头通过弹性或可调节的带固定到使用者的头部,从而当用户释放使用者的双手时使用 正在其后面的车辆或类似物上移动,枕头的填充是可移除的,以便于清洁或洗涤枕头盖和带子,并且枕头部分邻近使用者的头部容纳装置 为了安装盖子以覆盖用户的头部,该帽子还可以设置有遮阳板等,以保护用户的眼睛。