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11. 发明授权

US4358955A Liquid level gauge 失效
标题翻译：液位计
公开(公告)号：US4358955A
公开(公告)日：1982-11-16
申请号：US192427
申请日：1980-09-29
申请人： Joseph M. Rait
发明人： Joseph M. Rait
IPC分类号： G01F23/00 , G01F23/22 , G01K11/12
CPC分类号： G01F23/00 , G01F23/22 , G01K11/12 , Y10S248/904
摘要： Apparatus for externally determining the level of a mass of flowable material such as liquid or granular material contained in a closed or sealed container having walls of magnetic material includes an elongate strip of thin magnetized metal sheet material coated with a thermochromic substance which varies chromatically with variations in temperature. The elongated strip is applied to the outer surface of the wall of the container in heat conducting relationship thereto by magnetic attraction and extends along the height of the container. The container is exposed to a temperature change either natural, such as that which occurs at sunset and sunrise, or artificially induced. Because of the difference in the rate of heat conduction of the void volume and the filled space of the container, the container wall experiences a temperature gradient which is most pronounced at the interface of the contents and the void space. The temperature of the container wall changes abruptly at the surface of the contents. This change in temperature is readily discernible visually because of the abrupt change in color of the elongated strip at the material interface thus permitting an observer to readily detect the level of the contents of the container.
摘要翻译：用于外部确定包含在具有磁性材料壁的封闭或密封容器中的可流动材料质量如液体或颗粒材料的水平的装置包括涂覆有热变色物质的细磁化金属片材的细长条带在温度。细长带通过磁吸引力与热传导关系而被施加到容器壁的外表面，并沿容器的高度延伸。容器暴露于自然的温度变化，例如在日落和日出时发生的温度变化或人为诱导的温度变化。由于空隙体积和容器的填充空间的热传导速率的差异，容器壁经历在内容物和空隙空间的界面处最显着的温度梯度。容器壁的温度在内容物表面突然变化。由于在材料界面处的细长条纹的颜色突然变化，温度的这种变化在视觉上容易辨认，从而允许观察者容易地检测到容器内容物的含量。

12. 发明授权

US4332560A Particle collector for use with dental suction apparatus 失效
标题翻译：用于牙科吸引装置的颗粒收集器
公开(公告)号：US4332560A
公开(公告)日：1982-06-01
申请号：US128631
申请日：1980-03-10
申请人： Joseph M. Rait
发明人： Joseph M. Rait
IPC分类号： A61C17/06 , A61C17/04
CPC分类号： A61C17/046
摘要： A selectively usable particle collector for recovering precious metals in clean condition during use of dental suction apparatus is shown. A reservoir where particles are deposited has a closure cap with ports to one of which can be removably attached a replaceable pick up tube to be inserted in the patient's mouth; the other is adapted to removably receive a flexible hose leading to a vacuum source both ports being in communication with the reservoir. In another embodiment a portion of the cap can be rotated to selectively effect either direct communication from the pick up tube to the flexible hose or through the reservoir. A metering vent is provided to regulate vacuum pressure.
摘要翻译：示出了在使用牙吸入装置期间用于回收清洁状态的贵金属的可选择性的颗粒收集器。沉积有颗粒的储存器具有封闭盖，其具有端口，其中一个端口可拆卸地连接到可插入到患者口中的可更换的拾取管; 另一个适于可移除地接收通向两个端口与储存器连通的真空源的柔性软管。在另一个实施例中，帽的一部分可以旋转以选择性地实现从拾取管到柔性软管或通过贮存器的直接连通。提供计量通气口以调节真空压力。

13. 发明授权

US4075616A Detector for alarm system 失效
标题翻译：报警系统探测器
公开(公告)号：US4075616A
公开(公告)日：1978-02-21
申请号：US630998
申请日：1975-11-12
申请人： Joseph M. Rait
发明人： Joseph M. Rait
IPC分类号： G08B13/10 , G08B13/20 , G08B17/04 , G08B17/06 , G08B17/10 , H01H3/14
CPC分类号： G08B13/20 , G08B13/10 , G08B17/04 , G08B17/06 , G08B17/10 , G08B17/113 , H01H3/142
摘要： Sensing devices responsive to changes in the physical condition of the area in which they are located are disposed in elongate, flexible carriers to form a detecting unit which can be arranged in a tortuous, undulating array to cover an undefined area of any shape desired with a detecting density of any chosen value. The detecting unit can assume various forms including that of a pair of conducting elements disposed within an insulating tube in opposed relation positioned to complete the continuity of a switching circuit when the tube is flexed to cause engagement of the conductors. Another embodiment comprises a plurality of braided strands of insulating material extending lengthwise within an insulating carrier cable sheath. A pair of conductors is included in the braiding in a spiral disposition with each conductor being disposed along the entire length in opposed relation to the other conductor. Another embodiment includes a closed tubular element filled with an inelastic fluid having a servomechanism at one end to actuate a switching device for an electric alarm circuit in response to a change in liquid level. A modification of this embodiment would include a light responsive element in lieu of a servomechanism of a sensitivity so as to respond to a change in light transmission due to the interference of the liquid when the liquid level moves to a position which interferes with the light transmission source or the ambient light.

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