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| Number | Title | Issue Date |
| 4554494 | Fluid level gauge having magnetic sensor A fluid measurement gauge is principally used to measure the fluid level in large underground storage tanks, such as for storing gasoline at service stations. A housing is positioned vertically in the fluid and includes a leadscrew which is driven by a st... | 11/19/1985 |
| 4483192 | Water level indicator for nuclear reactor vessel A water level indicator for a pressure vessel is provided which employs a plurality of vertically spaced cantilevered mounted spring members. The free end of each spring member is connected to a depending float member. The float member has sufficient mass... | 11/20/1984 |
| 4368640 | Liquid level sensing device A liquid level sensing device comprising a load cell supporting a column or stack of segments freely resting on one another. The density of each element is substantially identical to that of the surrounding liquid. The elements are freely guided within a ... | 01/18/1983 |
| 4255859 | Drop-weight material level indicator A drop-weight type material level indicator apparatus, method and system wherein an optical disc rotationally coupled to an idler pulley in a modular sensor unit mounted at the top of a material storage bin generates counting pulses as a cable trained ove... | 03/17/1981 |
| 4228427 | Monitor apparatus for sump pumps Audible or visual warning signals are employed in a pump system having a primary and an auxiliary pump to indicate loss of power or a malfunctioning pump. Float switches react to a rising liquid level, thereby opening fail-safe circuits, and closing warni... | 10/14/1980 |
| 4194396 | Automobile fuel gauge system An automobile fuel gauge system comprises a main sensor unit for a main indicating system being provided in a fuel tank, a small chamber with top open fixedly provided at the bottom of the fuel tank and having at its lower side a hole for fuel passage, an... | 03/25/1980 |
| 4155254 | Volume and density indicator system for liquids in tanks A liquid storage tank is provided with an internal fixed support tube. Magnet-bearing liquid level and liquid density indicator floats are concentrically related to the fixed support tube externally thereof. Concentrically related, magnet-bearing indicato... | 05/22/1979 |
| 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 |
| 4078430 | Dual liquid level indicating gauge An indicating gauge has dual floats to measure the levels of two liquids contained in the same tank. A separate measuring tape is controlled by each float to provide an indication of the liquid level through a single viewing window above the tank. In cert... | 03/14/1978 |
| 3972235 | System for determining the amount of liquid in a tank or series of tanks A system including a source of electrical energy, a transformer, a plurality of submerged tanks, each having a perforated container therein, a first multiple switch electrically connected to the transformer, a plurality of conductors, each selectively lea... | 08/03/1976 |
| 3966175 | Apparatus for introducing particulate material into a container Apparatus is disclosed for disposing of radioactive waste materials by placing them into a steel drum together with cement and water, mixing the contents, and then storing the drum for a period of time to permit partial decay of radioactive materials. Als... | 06/29/1976 |
| 3946625 | Liquid detector A detecting float is normally made floating on a first liquid, and when a liquid to be detected having a specific gravity less than the first liquid is oncoming, the detecting float sinks relative to the new liquid level as compared with the position whic... | 03/30/1976 |
| 3942379 | Floating wave stilling chamber for liquid level indicator A gage mechanism for determining the level of a liquid, comprising a measuring means joined to a liquid level indicating device, a floating stilling chamber circumscribing the periphery of the liquid level indicating device, said stilling chamber having w... | 03/09/1976 |
| 3935741 | Level sensor A storage tank liquid level sensor for indicating levels of two immiscible liquids in the tank wherein a first magnet is carried by a float on top of one liquid and a second magnet is carried by a float on top of the other liquid, the first magnet operati... | 02/03/1976 |
