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7947503 |
Monitor and methods for characterizing airborne particulates
A dust monitor is disclosed that is suitably deployed in dusty environments and capable of providing near real-time indications of exposure to airborne particulates. The monitor includes a filter...
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7874211 |
Measuring method and measuring device using quartz oscillator
An object of the present invention is that any of mass load, viscous load and viscoelasticity load is measured separately from other load whereby properties of the substance to be measured are able...
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7285736 |
Oscillating Inertial Microbalance and Method of Passive Compensation
The claimed subject matter is directed to a continuous passive temperature, pressure, modulus of elasticity, and force compensated oscillating inertial microbalance and method of using the same....
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7091427 |
Apparatus using resonance of a cavity to determine mass of a load
A scale is provided, the scale including a cavity having a resonant frequency which is alterable with variations in mass of a load applied to the cavity. The scale also typically includes a...
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7053319 |
Electronic weighing apparatus utilizing surface acoustic waves using sensors operating at different frequencies, having temperature compensation, and a push oscillator
A weighing apparatus includes a SAW oscillator and a “push oscillator” to force the SAW oscillator into a desired mode of operation. A SAW temperature oscillator and a thermistor are also pro...
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6963036 |
Accurate, high speed weighing apparatus and method
The static or dynamic weighing apparatus for weighing an object or item, comprising a weighing assembly that includes a base with four (4) load cells attached to it, two (2) active load cells and...
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6931949 |
Apparatus for measuring the weight of small items
The invention provides an apparatus for measuring the mass and calculating the weight of individual objects to be held thereby, comprising forceps having a proximal portion and a distal portion,...
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6888073 |
Vibration absorbing system of micro gravity rotating apparatus
A substance mass measuring system is applied to a microgravitational rotating apparatus vibration control system to easily measure the mass of an object placed in an experimental box. Recess...
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6784381 |
Method of manufacturing a microbalance
22A temperature and/or pressure compensated microbalance is disclosed. Temperature compensation is achieved by applying heat to at least a part of the microbalance, measuring a...
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6762370 |
Vibrating tray scale having a clamping device that allows for detection of loose matter in a mail piece
A vibrating tray scale capable of detecting small amounts of loose particulate matter contained within a mail piece is disclosed. The scale is provided with a clamping device having a plurality of...
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6756548 |
Apparatus and method for measuring mass in a microgravity environment
An apparatus and method of measuring the mass of a test specimen located in a microgravity environment. The test specimen is attached to the free end of a cantilevered spring for joint vibration....
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6706977 |
Self-monitoring controller for quartz crystal microbalance sensors
A controller for a quartz crystal microbalance (QCM) sensor system and method for detecting mass deposition on a QCM sensor. The controller controls a QCM using temperature-, voltage- and...
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6692567 |
Seismic weigh-in-motion system
A seismic weigh-in-motion system (12) which utilizes a seismic sensor (32) mounted, off-pavement of the highway prior to the point at which the truck (10) enters the deceleration lane at the truck...
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6668652 |
Nano-substance mass measurement method and apparatus
A method for measuring the mass of nano-substances including the steps of gripping a nano-substance with a nanotweezer gripping portion made of a plurality of nanotubes, resonating the nanotweezer...
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6485205 |
Media weight sensor using an acoustic resonator
This invention relates to a media weight sensor of the type that includes a transducer consisting of a metal desk with a piezoelectric element fabricated by one side which form the back of a...
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6465749 |
Magnetostrictive mass sensing apparatus and method
An apparatus and method for weighing particulates in a gas stream has a generally cylindrical tube manufactured from a magnetostrictive material. One end of the tube is anchored to a mounting...
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6444927 |
Microbalance with reduced temperature and / or pressure sensitivity
22A temperature and/or pressure compensated microbalance is disclosed. Temperature compensation is achieved by applying heat to at least a part of the microbalance, measuring a...
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6313415 |
Pulse width modulated weighing platform
An electronic scale uses an analog signal from a load cell which is converted directly to a pulse width modulated output signal. This pulse width modulated output signal represents the weight of an...
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6080939 |
Mass determination device having counterbalanced normalized temperature coefficients
A mass determination device includes a combination of an elastic element connected with a mass holder. The combination has a normalized temperature coefficient of frequency substantially equal to...
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5946795 |
Method of manufacturing a micromechanical oscillating mass balance
A micromechanical oscillating mass balance and method adapted for measuring minute quantities of material deposited at a selected location, such as during a vapor deposition process. The invention...
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5902964 |
Measurement of mass using simple harmonic motion with active spring and active damping
A method for measuring the masses of objects in any gravity environment, including microgravity or zero gravity. An object is placed on or attached to a platform that is movable back and forth...
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5900592 |
Load sensing system
A load sensing system inexpensively monitors the weight and temperature of stored nuclear material for long periods of time in widely variable environments. The system can include an electrostatic...
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5877455 |
Payload monitoring for a tractor-trailer
A system for determining the weight of a vehicle includes a first axle subject to a relatively fixed axle weight. Typically, this axle is a front steering axle for a tractor-trailer combination...
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5869763 |
Method for measuring mass change using a quartz crystal microbalance
A quartz crystal resonator is excited in two different modes at the same time such that the mass change and the temperature change can be measured independently. In using such a quartz crystal the...
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5684276 |
Micromechanical oscillating mass balance
A micromechanical oscillating mass balance and method adapted for measuring minute quantities of material deposited at a selected location, such as during a vapor deposition process. The invention...
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5604335 |
Measuring method of mass concentration of suspended particulate matter in gas
The oscillation of an oscillator is automatically stopped during gas sampling, and the gas sampling is automatically stopped during the measurement of the frequency of the oscillator before and...
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5550328 |
Electronic scale recalibrating device consisting of a moveable calibration weight
An electronic scale is disclosed having a device for recalibrating the scale from time to time after the scale is moved from the factory to a site of installation in order to adjust the scale for...
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5525762 |
Balance with force support
Disclosed is a balance with a first parallel guide (3, 3') which resiliently connector a load receiver (2) to an area (5, 5') fixed to the housing and which is resiliently deformed under the...
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5488203 |
Force compensator for inertial mass measurement instrument
In an inertial mass measurement instrument, an active force compensator compensates for inertial forces transmitted by an oscillating elastic element to a primary support of the instrument. The...
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5481072 |
Low profile load cell for a weighting machine
A load cell, one end of the cell being mounted on a base and the other end of the cell being arranged for connection to a force applicator so that in operation applied loads are transmitted...
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5478975 |
Vibrating beam force sensor clamping assembly
In a load cell for a weighing machine, the load cell includes a vibrating beam force sensor clamped at its two ends to respective support parts of the load cell, and wherein each end of the sensor...
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5442146 |
Counting scale and load cell assembly therefor
The invention is directed to a counting scale which implements a load cell assembly for the measurement of weight used in counting calculations. A load cell in such an assembly has a beam structure...
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5408888 |
Load measuring apparatus
An apparatus for measuring a force or load comprising a vibratory beam which vibrates back and forth at a resonant frequency. The beam has first and second end nodal points and first and second...
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5402670 |
Mass measuring system
An apparatus measures the mass of a tube and liquid contained in the tube. A stiff beam is fixed at one end and connected to the tube with a magnet thereon. An electric circuit generates a current...
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5391844 |
Load cell
The invention is a load cell for the measurement of force, independent of displacement, created by means such as weight, acceleration, pressure, and the like. The load cell has a beam structure...
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5362929 |
Weight sensor device
A weight measuring device includes two piezoelectric elements. The first piezoelectric element induces vibration in an object to be measured, and the second one detects the reaction force of the...
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5349844 |
System and method for resonant filter mass monitoring
A system and method for measuring particulate concentrations. The system includes a substantially planar, peripherally supported filter for capturing the particulates, an oscillator for oscillating...
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5336854 |
Electronic force sensing load cell
A load cell device includes a load cell structure formed of a suitable metal and including vertically spaced apart, generally parallel horizontal elements integrally formed with longitudinally...
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5321209 |
Electronic weighing device
A spring structure for a weight scale is described which is assembled from four extruded aluminum parts. The structure readily lends itself to the addition of a platform for placing weights and its...
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5285860 |
Container scale
The present invention concerns a process and a device for carrying out the process for weight determination of the contents of containers (5), for example for garbage. Two swivel arms (2) that are...
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5232063 |
Weighing apparatus with vibratory string force sensor
A weighing scale includes a vibratory string force measuring device (1) the frequency of which varies as a function of the applied load. The load signal from the vibratory string device is supplied...
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5219032 |
Microwave electronic load measuring system
An electronic weighing system is disclosed which, employs spaced cylindrical dielectric rings as the load measuring transducer. A support structure is provided to linearly vary the spacing between...
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5183124 |
Compact self-adjusting weighing system having stable measurement resolution
A weighing system and method having stable measurement resolution for measuring gems and other light masses. The system includes circuitry for correcting errors in the measured value of the masses...
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5178228 |
Scale for determining the weight of an item within a predetermined time
A scale for fast determination of weights including a platform and a load cell transducer. Output of the transducer is converted to a digital signal, processed by a low pass digital filter, and...
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5109937 |
Transport mechanism for a weighing scale
A removable transport mechanism for a vibrating tray scale for conveying flats on off of the platform of the tray. The removable drive mechanism has belts trained about rollers that can be readily...
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5095764 |
Force transducer and method of manufacturing same
A force transducer includes a force transmitting mechanism comprising a reference member which is stationary during measurement, a force input member and two holders adapted to hold a transducing...
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5094306 |
Apparatus for controlling the transport mechanism of a weighing scale
A control for a transport mechanism vibrating tray scale that conveys flats on and off of the platform of the tray. The scale supports a follower plate that has ramps which contact with the rollers...
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5035141 |
Apparatus for measuring small changes in liquid level in a container
A liquid level sensing apparatus for detecting leaks in storage tanks. A buoyancy member is at least partially immersed in the liquid, suspended from a pivoted, counterbalanced, parallelogram...
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5031710 |
Electronic fish scale
An electronic fish scale having a spring connected to a hook to which the fish or other item to be weighed is attached. Attaching the weight to the hook causes linear displacement of the spring. A...
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5002141 |
Vehicle weighing in motion apparatus and method
A weighing in motion (WIM) apparatus and method in which scale platforms are provided exhibiting a high rigidity selected to achieve a relatively high natural frequency response characteristic....
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