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A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 8042388 | Multi-joint fuel level sender gage assembly A fuel level measuring system for a liquid fuel tank may utilize a primary sender gage assembly employing at least a primary sender gage, a primary sender arm, and a primary sender float. The system may further utilize a secondary sender gage assembly employing at l... | 10/25/2011 |
| 7673509 | Magnetically coupled drive for a sealed liquid level sender The internal movement of one embodiment of a sealed fuel level sender employs two magnets disposed diametrically opposite each other about a pivot. The actuator that is operated by in-tank fuel level has two magnets disposed diametrically opposite each other about t... | 03/09/2010 |
| 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 |
| 7216537 | Fiber optic flammable liquid measuring system An optical liquid measuring system for measuring the amount of flammable liquid in a storage tank consisting of a pair of encoder disks that are operatively connected to a pair of floats through a pair of pulley systems. The floats are designed so that the first flo... | 05/15/2007 |
| 7181654 | System and method for detecting an abnormal situation associated with a reactor A system for detecting abnormal situations associated with a reactor in a process plant receives statistical data associated with pressure within a reactor vessel. For example, a pressure sensor device disposed at least partially within the reactor vessel may genera... | 02/20/2007 |
| 7162923 | Adjustable floating open-water evaporation pan An improved evaporation pan assembly having at least three float assemblies attached to the outer side wall of a circular shaped evaporation pan located in 120 degrees increments. An anchor assembly is included having a steel pole driven into the bed sediment. An op... | 01/16/2007 |
| 7161165 | Optical transducer for continuously determining liquid level An optical transducer for determining liquid level within a container includes a sensing probe having a first elongate measurement face and a second elongate measurement face that converges toward the first measurement face. A light source is positioned for directin... | 01/09/2007 |
| 7082827 | Leak detector An example of an apparatus for detecting the lowering of a top surface of a liquid includes a housing that has a housing hole, and an insertion member attached to the housing. A dowel is inserted into the housing hole, and a float is attached to the dowel. A detecto... | 08/01/2006 |
| 7004011 | Leak detector A device for detecting leaks in containers that are open to the effects of rain and/or evaporation comprising an outer cylinder or container partially submerged in a container or vessel to be measured, such as, a swimming pool, three adjustable legs attached to the ... | 02/28/2006 |
| 6998552 | Float-type liquid level switch assembly with light emitting elements A float-type liquid level switch includes a main body, a float, a magnetic reed switch, and a light emitting element; the float has a magnet joined thereto, and is displaceable along a length of the main body; the magnetic reed switch and the light emitting element ... | 02/14/2006 |
| 6802219 | Tide staff system The present invention relates to a segmented cylindrical tide staff system [11] for erection at remote areas for dynamic calibration of electronic tide meters and computer models of tides, said tide staff system consisting of plurality of cylindrical tubes [ | 10/12/2004 |
| 6748805 | Multiple input level sensor A liquid level measuring apparatus is provided, which includes an input circuit configured to receive electrical signals from level sensors configured to provide an electrical signal proportional to a liquid level in a tank portion. The input circuit provides a sing... | 06/15/2004 |
| 6481277 | Temperature control unit and sight glass An apparatus for indicating a fluid level in a reservoir includes a conduit for communication with a reservoir and including a sight glass. A buoyant primary float is provided within the conduit, and a stop is provided within the conduit for engaging the ... | 11/19/2002 |
| 6464465 | Level control device for a wastewater collection basin A level control device is adapted for use in a wastewater pump station. The level control device cooperates with a discharge pump to control the volume of wastewater contained in the pump station. The level control device includes a buoyant housing for be... | 10/15/2002 |
| 6397674 | Method and apparatus for sensing the level of fluid within a container An apparatus for sensing a level of fluid within a container. The apparatus includes a support coupled to the container. The apparatus additionally includes first and second floats. Each of the first and second floats is pivotally coupled to the support p... | 06/04/2002 |
| 6370951 | Method and apparatus for sensing the level of fluid with a container An apparatus for sensing a level of fluid within a container. The apparatus includes a first cantilevered arm having a first float coupled to the container. The apparatus additionally includes a second cantilevered arm having a second float coupled to the... | 04/16/2002 |
| 6336467 | Float and valve assembly for accumulator An improved float and valve assembly for a liquid-gas accumulator including a buoyant float having a density selected in accordance with the working pressure, a float which can be lengthened or shortened, and friction and drag is reduced by optimizing the... | 01/08/2002 |
| 6326895 | Fluid level sensor for fluid tanks of boats A fluid level sensor for a fluid tank of a marine vessel is provided. The sensor includes a sensor mount and further includes a circuit housing that is pivotally connected to the mount to pivot about a predetermined pivot axis. A float assembly is configu... | 12/04/2001 |
| 5950487 | Gauge for measuring liquid levels An apparatus for measuring liquid level in a container, the apparatus having a flexible measurement scale attached at one end to a weight for retainment at the bottom of the container and at the opposite end to a receiver at the top of the container. A fl... | 09/14/1999 |
| 5848549 | Magnetostrictive position sensing probe with waveguide referenced to tip for determining fluid level in a container A magnetostrictive position sensing device is disclosed where a probe assembly surrounding a waveguide is anchored at one end to the bottom of a tank and terminates in a transducer assembly attached to the top of the tank. The probe assembly compensates f... | 12/15/1998 |
| 5812060 | Automated waste cooking grease recycling tank An automated waste cooking grease recycling tank having a top, a bottom, at least one side wall defining an inside and an outside of the tank with a plurality of openings in the tank. A liquid level sensor is inserted into the inside of the tank through o... | 09/22/1998 |
| 5607002 | Chemical refill system for high purity chemicals A highly reliable digital level sensor assembly is provided to replace optical and capacitance type sensors in high purity chemical delivery systems. The digital level sensor assembly is particularly useful in bulk chemical refill delivery systems for hig... | 03/04/1997 |
| 5586466 | Non-slip sleeve for float level sensor shaft A non-slip sleeve fits over a shaft for a float level sensor so a float moves up and down on the sleeve surface. This non-slip surface prevents deposits forming thereon when used in tanks with sludge or other solids suspended in liquids. The thin walled s... | 12/24/1996 |
| 5551290 | Leak detector A device for detecting leaks in containers that are open to the effects of rain and/or evaporation comprising an outer cylinder or container suspended in a container or vessel to be measured, such as, a swimming pool, an inner tube, an outer floating tube... | 09/03/1996 |
| 5493086 | Monitoring and regulating device for a fluid such as engine oil An engine oil regulating device may monitor and regulate a fluid level for stationary engines or compressors for gravity feed and pressurized oil applications. Oil may be received in a float chamber that may have a safety shutdown float and an oil level r... | 02/20/1996 |
| 5465766 | Chemical refill system for high purity chemicals A highly reliable bulk chemical refill system for high purity chemicals is provided. The system employs at least one metallic level sensor in a refillable ampule. The refillable ampule of the present invention comprises a metallic level sensor for sensing... | 11/14/1995 |
| 5347864 | Liquid level measuring apparatus An improved liquid level measuring apparatus having a plurality of spaced reed switches having a microprocessor attached to the liquid level measuring sensor apparatus. The switches are wired together in parallel and in sets and are addressed by a shift r... | 09/20/1994 |
| 5299456 | Electronic dipstick for indicating the oil level of an engine A dipstick for measuring oil levels provides an electronic indication when oil in an internal combustion engine sump is low or high. The electronic dipstick does not have to be removed as is normal for most dipsticks which determine level from observing a... | 04/05/1994 |
| 5294917 | Liquid level sensor using float and magnetic means A float-operated switch assembly is mounted in an opening in the top of a tank. It includes a vertical non-magnetic pipe having a pair of floats normally hanging beside it. Each of the floats has a magnet thereon normally in a position proximate the pipe ... | 03/15/1994 |
| 5283569 | Float actuated flood warning system with remote telephone reporting A flood warning system including a stilling well having three vertically spaced apart float switches therein for detecting the level of flood waters. Upon the water level reaching and closing the lowest float switch, a telephone alarm dialer is actuated t... | 02/01/1994 |
| 5103673 | Fluid level indicator for small watercraft A fluid level indicator for a small watercraft is provided which can be used to effectively detect and indicate a fluid level in a small watercraft even when the watercraft is experiencing severe rocking or up and down movements during operation and which... | 04/14/1992 |
| 5099920 | Small diameter dual pump pollutant recovery system A groundwater pollutant recovery system using the cone of depression approach, in which a sensing probe having liquid level sensors responsive to both water and pollutant levels and having attached to it the pollutant intake is deployed in a recovery well... | 03/31/1992 |
| 5079950 | Level indicating in vehicle holding tanks A level indicating assembly for use in a tank mounted in a vehicle, such as an RV or boat, includes a fitting body for mounting the assembly in the top of the tank, and probes extending through the body into the tank. At least one of the probes has a holl... | 01/14/1992 |
| 5070731 | Device for measuring the level of liquid contained in a substantially deep reservoir Disclosed is a device for the measurement of the level or volume of a liquid contained in a reservoir of the type comprising a casing that houses an element defining two generally vertical, separate, electrical tracks, at least one of which is electricall... | 12/10/1991 |
| 4934458 | Small diameter dual pump pollutant recovery system A groundwater pollutant recovery system using the cone of depression approach, in which a sensing probe having liquid level sensors responsive to both water and pollutant levels and having attached to it the pollutant intake is deployed in a recovery well... | 06/19/1990 |
| 4894924 | Method for measuring level of large structure Displacement sensors which are communicated with a stationary reference side are placed at the measuring points of a large structure. Displacement at each measuring point is electrically measured by utilizing the fact that the liquid levels at the station... | 01/23/1990 |
| 4879545 | Safety indicator device for low water crossing A signalling device for signalling danger from water over a low water crossing area is provided. The device has a support post, a message panel, and flashing lights in electrical connection with an energy source, the electrical connection being completed ... | 11/07/1989 |
| 4676102 | Device for indicating the quantity of a liquid in a reservoir and reservoir provded with such a device This invention relates to a device for indicating the temporally variable quantity of a liquid contained in a reservoir or tank, whatever the indication of this reservoir with respect to the horizontal, wherein the device comprises an auxiliary recipient ... | 06/30/1987 |
| 4581931 | Differential level-monitoring float device A high-sensitivity device for measuring the mutual level differentials among a certain number of reading locations, the device comprising a plurality of containers, one for each reading location, mutually connected at the bottom ends by a piping opening i... | 04/15/1986 |
| 4562734 | System for measuring quantity of liquid contained in tank There are provided at least two liquid level detectors in a liquid tank, such as an automobile fuel tank. The detectors are connected so as to obtain the sum of the output signals of the detectors. The positions of the detectors in the tank are determined... | 01/07/1986 |
