Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7444865 | Parallelogram actuated liquid level sensor A liquid level sensor for insertion into a tank for measuring the liquid level in the tank comprises an elongate tubular frame and a float movable inside the frame to seek the liquid level. A float lock guide formed as an elongate member is mounted lengthwise inside... | 11/04/2008 |
| 7418861 | Mechanically self actuated liquid level sensor A liquid level sensor for measuring liquid levels in underground and above ground containers includes a frame formed to have an elongate hollow tubular configuration that encloses a cavity. A cam pivot has an end extending into the cavity from a first inner wall por... | 09/02/2008 |
| 7334536 | Pop-up sewer backup indicator An improved sewer backup indicator. The sewer backup indicator is installed into a sewer cleanout cap housing which comprises a pop-up device that detects and holds the detection of a back up in the sewer system, which is due to number of reasons. This invention hel... | 02/26/2008 |
| 7318353 | Method and apparatus for a product displacement sensing device A displacement sensing device transduces deflection of a body disposed around a conduit into complementary signals indicative of the amount of displacement experienced by the conduit. The displacement sensing device includes a cuff and a sensor disposed on an outer ... | 01/15/2008 |
| 7043984 | Automatically actuated liquid level sensor A float is arranged in a tubular frame to be unlocked to float in a liquid when the lower end of the frame contacts a bottom surface of a container containing the liquid. A float lock guide and a float lock actuator are mounted in the passage to move the float later... | 05/16/2006 |
| 6557412 | Non-fouling liquid level control A non-fouling liquid level detector and control especially for a sealed system likely to have iron particle contaminants. The device employs a float projecting above the liquid level and bearing above the liquid level a unmagnetized ferromagnetic tell-tal... | 05/06/2003 |
| 6541758 | Liquid-level gauge There is provided a liquid-level gauge for accurately measuring a liquid-level height of fluid to be measured. In the liquid-level gauge, a float having a uniform cross-sectional form in the height direction and a specific weight value small than that of ... | 04/01/2003 |
| 6305220 | Fuel gauging system for a motor vehicle fuel tank A fuel gauging system for a motor vehicle fuel tank, including a housing (100) supporting a resistive element (200), an arm (300) pivotally mounted on the housing (100) and comprising at least one cursor (350) engaging the resistive element (200), and a l... | 10/23/2001 |
| 6176134 | Filling level sensor A filling level sensor for generating electrical signals as a function of the filling level, in which a regulator is integral to a guider of a carrier part, (6). An actuator of the regulator is connected to a mounting arm. (9) via a coupling element (8). ... | 01/23/2001 |
| 6167756 | Pivotal float for liquid level detection apparatus A float for a liquid level detection apparatus including a tube extendable through liquid in a tank. The float is a buoyant body slidably mounted about the tube and having a diameter passable through an aperture in the tank. The float is preferably formed... | 01/02/2001 |
| 4965555 | Arrangement for accurately installing a replaceable reed switch of a device for monitoring the liquid level in a tank In a device for monitoring the liquid level in a tank, utilizing a reed switch projecting into the tank in an internally cylindrical hollow rod and a float provided with a permanent magnet and guided on the hollow rod, the reed switch is constructed as an... | 10/23/1990 |
| 4802363 | Apparatus and method for measuring liquid depth A flotation device inside an elongate frame rises to the level of a liquid whose depth is being measured. The flotation device is locked in the frame while the apparatus is withdrawn from the liquid. The liquid level may then read from a scale on the fram... | 02/07/1989 |
| 4428233 | Gauge for measuring depth of flowing fluid This guage is adapted to measure the depth of fluid flowing past a flume or weir in a generally horizontally disposed conduit. It comprises a transparent tube or stilling well which contains a float, and which is adjustably secured by a pair of clamps to ... | 01/31/1984 |
| 4154103 | Collapsible liquid level measuring device A liquid level measuring device for a container is disclosed. The liquid level measuring device has an elongated frame with a lower end insertable into the liquid in the container. Mounted on the frame is a buoyant floats. The floats and frame are constru... | 05/15/1979 |
| 4092861 | Liquid level measuring device A liquid level measuring device having an elongated frame is disclosed. One or more floats are mounted in the frame on cables mounted between pulleys at each end of the frame. Brake pins frictionally engage the guide cables and means are provided to selec... | 06/06/1978 |
| 4051727 | Liquid mixture indicator for rug shampoo apparatus An indicator mounted on a receptacle for determining the proportion of the liquid mixture components in the receptacle of a liquid dispensing apparatus, such as a rug or carpet shampoo device. Even if the receptacle is partly filled with a liquid mixture,... | 10/04/1977 |
