公开(公告)号：US5647656A

公开(公告)日：1997-07-15

申请号：US440014

申请日：1995-05-12

申请人： David E. Brown ,  Mark A. Colman ,  Michael J. Kett

发明人： David E. Brown ,  Mark A. Colman ,  Michael J. Kett

IPC分类号： F21V8/00 ,  G01F23/02 ,  G01F23/72 ,  G01F23/74

CPC分类号： G02B6/0006 ,  G01F23/02 ,  G01F23/72 ,  G01F23/74 ,  G02B6/0081 ,  G02B6/002 ,  G02B6/0028 ,  Y10S73/05

摘要： Lighting assemblies are provided for visual indicators which indicate the level of fluid in a container. One such assembly comprises a backlighting assembly for a visual fluid level indicator having front and rear transparent viewing windows for viewing the level of a fluid contained therein, comprising (i) a substantially flat fiber optic panel located proximate the rear transparent viewing window; (ii) an attachment mechanism for attaching the substantially flat fiber optic panel to the visual fluid indicator proximate the rear transparent viewing window; and (iii) an illumination source optically coupled to the substantially flat fiber optic panel. The illumination source is a gas filled light source operating at less than 25 volts A.C. which is enclosed in a waterproof and explosion-proof enclosure, and which is optically coupled to the fiber optic panel by a fiber optic light cable. The lighting assembly may also be used for directly illuminating a magnetic fluid level indicator which indicates the level of fluid in a container to which it is attached.

公开(公告)号：US5645336A

公开(公告)日：1997-07-08

申请号：US654842

申请日：1996-05-29

申请人： David E. Brown ,  Mark A. Colman ,  Michael J. Kett

发明人： David E. Brown ,  Mark A. Colman ,  Michael J. Kett

IPC分类号： F21V8/00 ,  G01F23/02 ,  G01F23/72 ,  G01F23/74 ,  G01D11/28 ,  G01F23/38

CPC分类号： G02B6/0006 ,  G01F23/02 ,  G01F23/72 ,  G01F23/74 ,  G02B6/0081 ,  G02B6/002 ,  G02B6/0028 ,  Y10S73/05

摘要： Lighting assemblies are provided for visual indicators which indicate the level of fluid in a container. One such assembly comprises a backlighting assembly for a visual fluid level indicator having front and rear transparent viewing windows for viewing the level of a fluid contained therein, comprising (i) a substantially flat fiber optic panel located proximate the rear transparent viewing window; (ii) an attachment mechanism for attaching the substantially flat fiber optic panel to the visual fluid indicator proximate the rear transparent viewing window; and (iii) an illumination source optically coupled to the substantially flat fiber optic panel. The illumination source is a gas filled light source operating at less than 25 volts A.C. which is enclosed in a waterproof and explosion-proof enclosure, and which is optically coupled to the fiber optic panel by a fiber optic light cable. The lighting assembly may also be used for directly illuminating a magnetic fluid level indicator which indicates the level of fluid in a container to which it is attached.

摘要翻译： 提供照明组件用于指示容器中的流体水平的视觉指示器。 一个这样的组件包括用于视觉液位指示器的背光组件，其具有用于观察其中包含的流体的水平的前透明观察窗和后透明观察窗，包括（i）位于后透明观察窗附近的基本平坦的光纤面板; （ii）用于将基本平坦的光纤面板附接到靠近后透明观察窗的视觉流体指示器的附接机构; 和（iii）光学耦合到基本平坦的光纤面板的照明源。 照明源是充满气体的光源，其操作在小于25伏交流电，其封闭在防水防爆外壳中，并且通过光纤光缆光耦合到光纤面板。 照明组件也可以用于直接照射表示与其连接的容器中的液体的液位的磁性液位指示器。

公开(公告)号：US5351036A

公开(公告)日：1994-09-27

申请号：US805297

申请日：1991-12-10

申请人： David P. Brown ,  Michael J. Kett ,  Stephen P. Hebeisen

发明人： David P. Brown ,  Michael J. Kett ,  Stephen P. Hebeisen

IPC分类号： G01F23/02 ,  G01F23/284 ,  G08B21/00

CPC分类号： G01F23/02 ,  G01F23/2845

摘要： A point liquid level monitoring system includes a sensor removeably mounted to a liquid level device. The sensor is designed to direct a microwave signal from a transmitter through a window in the liquid level device. In one embodiment, the microwave signal is reflected off a surface in the device opposite the window and collected by a receiver. In another embodiment, the microwave signal is collected by a receiver mounted onto a second window opposite the first window through which the microwave signal is transmitted. When liquid is present in the liquid level device at or above the level of the transmitter and receiver, the microwave signal is attenuated as it passes through the liquid. Sensor electronics compare the received signal to a predetermined threshold level and provide an output indicating the presence or absence of liquid at the transmitter/receiver level. The sensor can be easily installed or removed from the liquid level device without draining, depressurizing, or otherwise disturbing the operation of the device or attached fluid systems and, when installed, does not obstruct visually reading liquid levels in the device.

摘要翻译： 点液位监视系统包括可移除地安装到液位装置的传感器。 该传感器被设计成引导来自发射器的微波信号通过液位装置中的窗口。 在一个实施例中，微波信号从与窗口相对的设备中的表面反射并由接收器收集。 在另一个实施例中，微波信号由安装在与第一窗口相对的第二窗口上的接收器收集，通过微波信号传输微波信号。 当在发射器和接收器的电平或以上的液位装置中存在液体时，微波信号在通过液体时被衰减。 传感器电子装置将接收到的信号与预定的阈值电平进行比较，并提供指示在发射机/接收机级别存在或不存在液体的输出。 传感器可以容易地从液位装置安装或移除，而不会排出，减压或以其他方式干扰装置或连接的流体系统的操作，并且在安装时不会妨碍目视读取装置中的液位。