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    • 2. 发明授权
    • Low pressure dew and frost point indicator
    • 低压露点和霜点指示器
    • US4179917A
    • 1979-12-25
    • US861267
    • 1977-12-16
    • Robert S. SheldonJan W. Rabek
    • Robert S. SheldonJan W. Rabek
    • G01N25/68
    • G01N25/68
    • A low pressure dew and frost point indicator of the type having a vortex tube which directs a cold air stream against the back of a viewing mirror for observation of the initial formation of frost. The mirror has means for simple and automatic centering with respect to the cold air stream of the vortex tube for maximum temperature transfer. The mirror engages no heat conducting elements and has means for improved cold temperature transfer. A venturi nozzle passes the warm air output of the vortex tube around the cold air output for adjustment to provide optimum cold air generation by reduction of the vortex tube outlet pressure. A temperature control valve controls the temperature in the sample chamber by mixing the warm and cold air outputs of the vortex tube.
    • 具有涡流管的低压露点和霜点指示器,其将冷气流引导到观察反射镜的后部,以观察霜的初始形成。 反射镜具有相对于涡流管的冷空气流简单和自动定心的装置,用于最大限度的温度传递。 镜子不配合导热元件,并具有改善冷温传递的手段。 文氏管喷嘴将涡流管的暖空气输出部分绕过冷空气输出端进行调节,以通过降低涡流管出口压力来提供最佳的冷气产生。 温度控制阀通过混合涡流管的冷暖空气输出来控制样品室中的温度。
    • 4. 发明授权
    • Low noise level control valve
    • 低噪音级控制阀
    • US4180240A
    • 1979-12-25
    • US861266
    • 1977-12-16
    • Robert S. SheldonJan W. Rabek
    • Robert S. SheldonJan W. Rabek
    • F16K47/02F16K25/00
    • F16K47/02
    • A low noise level valve for controlling high pressure fluid flow between an inlet and an outlet. The valve comprises a poppet movable along a given line with respect to a complementarily formed valve seat. The area between the poppet and valve seat comprises a series of spaced undulations which extend along a continuous curve of approximately 90.degree.. The undulations are disposed substantially parallel to the direction of poppet movement adjacent to the inlet and are substantially transverse adjacent to the outlet. The undulations define a plurality of orifices which are opened progressively from the outlet toward the inlet. The orifices act as pressure drops and also cause turbulence as fluid flows around the undulations, thereby holding the fluid flow below undesirable speed and noise levels. A balancing chamber may be provided to counter-balance the poppet movement. Sealing means may be provided by an undercut lip formed on a sealing member adjacent to the inlet.
    • 用于控制入口和出口之间的高压流体流动的低噪声水平阀。 该阀包括相对于互补形成的阀座沿着给定的管线可移动的提升阀。 提升阀和阀座之间的区域包括沿着大约90°的连续曲线延伸的一系列间隔起伏。 波纹布置成基本上平行于靠近入口的提升阀运动的方向,并且基本上横向邻近出口。 波纹限定了从出口朝向入口逐渐打开的多个孔。 孔口作为压力下降,并且当流体围绕波纹流动时也引起湍流,从而将流体流动保持在不期望的速度和噪音水平以下。 可以提供平衡室以平衡提动动作。 密封装置可以由形成在与入口相邻的密封构件上的底切唇提供。