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| Number | Title | Issue Date |
| 7229585 | Molded plastic rod with improved break strength An injection molded plastic rod suitable for use in a battery hydrometer. Stress-relieving formations are provided symmetrically arranged on opposite sides of an injection gate of the rod. The formations distribute injection stresses and shield the gate vestige.... | 06/12/2007 |
| 7069781 | Stillwell apparatus This invention involves a new housing for a liquid level detection device. More particularly, the new stillwell apparatus comprises, at least one tubular section, a means for extending the length of the stillwell, a conduit for delivering a cleansing solution... | 07/04/2006 |
| 6992494 | Method and apparatus for monitoring the purity and/or quality of steam A method and apparatus for monitoring at least one of steam purity and steam quality for steam used in a decontamination process. A capacitor is exposed to the steam, wherein the steam acts as a dielectric between the plates of the capacitor. Permittivity of the die... | 01/31/2006 |
| 6960921 | Method and apparatus for real time monitoring of metallic cation concentrations in a solution A method and apparatus for monitoring the concentration of metal cations in a chemical solution. In a preferred embodiment, the chemical solution is a solution for derouging or passivating stainless steel. A capacitive sensor provides data indicative of the concentr... | 11/01/2005 |
| 6946852 | Method and apparatus for measuring concentration of a chemical component in a gas mixture A chemical concentration detecting system for determining the relative concentration of a chemical component in a gas mixture. The gas mixture may include chemical components that are antimicrobial chemicals, as well as chemical components that are base chemicals, a... | 09/20/2005 |
| 6933733 | Method and apparatus for measuring the concentration of hydrogen peroxide in a fluid A method and apparatus for measuring the concentration of hydrogen peroxide in a liquid or gaseous fluid. A capacitor is exposed to the fluid, wherein the fluid acts as the dielectric between the conductors of the capacitor. The permittivity and dielectric constant ... | 08/23/2005 |
| 6930493 | Method and apparatus for monitoring detergent concentration in a decontamination process A method and apparatus for monitoring the concentration of a detergent in a detergent solution. A capacitive sensor is exposed to the detergent solution, and electrical properties of the capacitive sensor are responsive to changes in the concentration of detergent i... | 08/16/2005 |
| 6927582 | Method and apparatus for monitoring the state of a chemical solution for decontamination of chemical and biological warfare agents A method and apparatus for monitoring the state of a chemical solution for neutralization of chemical and biological warfare agents are disclosed. A capacitor is exposed to the chemical solution, wherein the steam acts as a dielectric between the plates of the capac... | 08/09/2005 |
| 6917885 | Method and apparatus for formulating and controlling chemical concentration in a gas mixture A method and apparatus for formulating and controlling concentrations of deactivating chemicals in a gas mixture inside a chamber. The gas mixture may include chemical components that are deactivating chemicals, as well as chemical components that are base chemicals... | 07/12/2005 |
| 6909972 | Method and apparatus for formulating and controlling chemical concentrations in a solution A method and apparatus for formulating and controlling concentrations of deactivating chemicals in a solution inside a chamber. The solution may include chemical components that are deactivating chemicals, as well as chemical components that are base chemicals, acti... | 06/21/2005 |
| 5987971 | Interlock for a storage tank used in containing a respirable liquid cryogen An sensor for sensing buoyancy force within a liquid mixture stored within a storage tank and an interlock employing the sensor to prevent a respirable cryogenic mixture from being dispensed from the storage tank with an unsafe oxygen content. The sensor ... | 11/23/1999 |
| 5942684 | Buoyancy force sensor for a hydrometer and interlock for a storage tank used in containing a respirable liquid cryogen A sensor for sensing buoyancy force within a liquid mixture stored within a storage tank and an interlock employing the sensor to prevent a respirable cryogenic mixture from being dispensed from the storage tank with an unsafe oxygen content. The sensor h... | 08/24/1999 |
| 5847276 | Fluid displacement level, density and concentration measurement system A method and apparatus for monitoring characteristics of a fluid contained in a vessel includes a fluid displacer suspended in the vessel. The buoyant force acting on the fluid displacer is measured using a pair of force transducers and used to calculate ... | 12/08/1998 |
| 5744716 | Fluid displacement level, density and concentration measurement system A method and apparatus for monitoring characteristics of a fluid contained in a vessel includes a pair of triangular fluid displacers suspended in the vessel. The buoyant forces acting on the fluid displacers are measured using force transducers and used ... | 04/28/1998 |
| 5495225 | Method of alerting a vehicle driver to different types of traction losses A warning system alerts a driver of a motor vehicle to different types of traction losses. A first sensing circuit (10) detects a loss of wheel adhesion by monitoring a vehicle drive line for a pronounced vibration within a range of between ten and fiftee... | 02/27/1996 |
| 5471873 | Densimeter A density measuring device having a float with a marker provided therein that is connected by a pair of springs to each of the two supports which are on opposite sides of the float along a guide. A sonic waveguide arrangement is provided extending along t... | 12/05/1995 |
| 5253522 | Apparatus for determining fluid level and fluid density A density measuring device having a float with a marker provided therein that is connected by a pair of springs to each of the two supports which are on opposite sides of the float along a guide. A sonic waveguide arrangement is provided extending along t... | 10/19/1993 |
| 5247834 | Density measuring apparatus A simple and mechanically-rugged calculation or monitoring of the density of fluids, particularly of fuels serving the purpose of driving an internal-combustion engine, provides that a buoyant member is immersed into the fluid under examination, the buoya... | 09/28/1993 |
| 5144275 | Positioning cylinder, especially for subterranean mining A positioning cylinder assembly for subterranean mining applications has a rotary potentiometer connected through a friction wheel transmission with the spindle of the cylinder which is rotated when the piston is axially displaced therein. The friction wh... | 09/01/1992 |
| 5045836 | Vehicle anti-freeze monitor A vehicle anti-freeze monitor for monitoring the capability of the vehicle's coolant mixture in the cooling system of the vehicle to resist freezing. The monitor includes a light emitting diode, a reed switch for coupling the indicator to a source of elec... | 09/03/1991 |
| 4943773 | Magnetostrictive linear displacement transducer having preselected zero crossing detector A liquid level detector of the type in which a magnetostrictive wire extends through the liquid level measurement range and is captured in a tensioned vertical orientation within a stainless steel tube. Liquid level is measured as a function of the time r... | 07/24/1990 |
| 4918628 | Stability meter for floating objects A stability meter comprises a translational accelerometer (1) which has a working axis along which it is sensitive to gravity. The meter is mounted on a vessel with the working axis horizontal when the vessel is in the upright position such that it transm... | 04/17/1990 |
| 4839590 | Piezoelectric actuator for magnetostrictive linear displacement measuring device A liquid level detector of the type in which a magnetostrictive wire extends through the liquid level measurement range and is captured in a tensioned vertical orientation within a stainless steel tube. Liquid level is measured as a function of the time r... | 06/13/1989 |
| 4756191 | Temperature compensated gravity measuring apparatus An affinity type gravity measurement instrument which is composed of material such as wood having a coefficient of thermal expansion. Within an internal cavity defined within the housing is disposed a quantity of liquid and a float partially submerged in ... | 07/12/1988 |
| 4680965 | Process for continuous density measurement A process for the continuous measurement of the density of a liquid by means of an aerometer body swimming in the liquid is characterized by the feature that the liquid is allowed to flow periodically at an increased flow rate past the aerometer body in o... | 07/21/1987 |
| 4641122 | Device for measuring the level or volume of liquid in a tank The present invention relates to a device for detecting the level of liquid in a tank. The device comprises a level detector formed of two arms pivoted on a common fixed support about first, respectively parallel, generally horizontal axes and a movable s... | 02/03/1987 |
| 4601306 | Apparatus for ascertaining and/or keeping constant the mixing ratio of a liquid mixture In the case of an apparatus for ascertaining and keeping constant the concentration of alcohol in the plate dampening fluid used in an offset litho press, having a float vessel with an inlet and an overflow such that the float controls the supply of alcoh... | 07/22/1986 |
| 4548226 | Apparatus for adjusting the concentration of oil in a water-containing oil material Method of adjusting a concentration of oil in a water-containing oil material which comprises determining a change in buoyancy exerted on a plummet suspended in the oil material and controlling the amount of water being supplied to the oil material accord... | 10/22/1985 |
| 4476723 | Density sensor A density sensor includes a stationary housing (12) and a reciprocating body (22) with a float (26) attached thereto to provide a buoyant force. The reciprocating body (22) is connected to a piston (32) by a reciprocating rod (34). The piston (32) is oper... | 10/16/1984 |
| 4422085 | Ink liquid viscosity control in an ink liquid supply system for an ink jet system printer An ink liquid supply system for an ink jet system printer includes a sub tank for introducing a new ink liquid from an ink liquid cartridge and an old ink liquid from a beam gutter included in the ink jet system printer. A float element is disposed in the... | 12/20/1983 |
| 4400978 | Electronic hydrometer and method of determining the density of a liquid An electronic hydrometer for determining the density of a liquid, the hydrometer comprising a housing having a liquid receiving chamber and means to insert a liquid of which the density is to be determined in the chamber. A float having a known weight is ... | 08/30/1983 |
| 4350885 | Battery hydrometer with analog output There is disclosed a battery hydrometer for providing an analog electrical signal having a magnitude related to the specific gravity of a battery electrolyte. The hydrometer includes a source of radiation for providing a detectable beam of radiation and a... | 09/21/1982 |
| 4142419 | Sensing device for liquids A device for indicating changes in the specific gravity of a liquid comprises first and second floats adapted to float on the surface of the liquid, the float having different shapes and/or densities so that the depth of the floats in the liquid varies in... | 03/06/1979 |
| 4134301 | Compensating fuel measuring system for engines A volumetric fuel meter is included in a fuel system whereby the measurement is compensated to express fuel flow in units of weight such as pounds, grams or in units of energy such as BTU's or calories (grams). The meter measurement is associated with an ... | 01/16/1979 |
| 4131019 | Method and apparatus for measuring specific gravity of liquids in process streams A method and apparatus for measuring the specific gravity of liquids in process streams by intermittently sampling the process stream and measuring the specific gravity of the sampled liquid under static conditions in a constant level overflow device by t... | 12/26/1978 |
| 4130126 | Ink maintenance sensor Apparatus and method for detecting and correcting for evaporation from recirculated unused ink drops in an ink jet printer. The specific gravity of the recirculating ink is compared with that of a standard by measuring the time of fall of heavy floats thr... | 12/19/1978 |
| 4061839 | Warning device for indicating critical condition of starter batteries in vehicles A warning system for indicating a critical charge condition of starter batteries in vehicles, especially in motor vehicles which operate according to the hydrometer principle; a specially constructed float is movably arranged on the inside of an areometer... | 12/06/1977 |
| 4055708 | Device for detecting the overdischarge of an accumulator as well as the surface level of the liquid contained in the accumulator A device for detecting the overdischarge of the accumulator as well as the surface level of electrolyte contained in the accumulator comprising a floating member, a case housing the floating member and having a hole through which the electrolyte in the ac... | 10/25/1977 |
| 4003255 | Measurement and control of fluid flow An improved method and apparatus for measuring fluid flow and controlling fluid flow systems. The invention uses a magnetically responsive float normally resting in contact with a stop element positioned in the flow conduit, with magnetic means positioned... | 01/18/1977 |
| 3994174 | Device for measuring the density of liquids A device for measuring the density of liquids. A float provided with a piece of soft iron on one side and with a permanent magnet on the other side is movably disposed in a housing through which a liquid may flow. The soft iron is surrounded by a differen... | 11/30/1976 |
