With Testing Patents (Class 177/50)
  • Patent number: 7870776
    Abstract: A weighing scale that is calibratable without a calibration weight that is separate and distinct from the scale. The scale has a weighing mode and a self-calibration mode and includes a base that supports a load cell, which in turn supports a mass receiver. Electronic circuitry within the scale is configured so that, during the calibration mode, the sprung weight of the base when the scale is inverted and supported by the mass receiver can be used to calibrate the scale. This avoids the need to maintain a calibration weight external to the scale. A process of calibrating the scale includes inverting the scale during the self-calibration process and allowing the circuitry to acquire a calibration parameter that is based on the inverted sprung weight.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: January 18, 2011
    Assignee: Edlund Company, LLC
    Inventors: Ryan S. Whitney, Shawn J. Stech
  • Publication number: 20100320265
    Abstract: A manipulation device (5) for either securing a twist-lock to a shipping container or releasing it therefrom or both, the device (5) comprising engagement means (20) operative to engage and rotate at least a portion of the twist-lock so as to secure the twist-lock in the shipping container or to release it therefrom; a support member (15) disposed above the engagement means (20), the support member (15) being arranged to receive and support a mid region of the twist-lock whilst allowing a lower portion of the supported twist-lock to protect below the member to be engagable with the engagement means (20), said support member (15) being in the form of a plate incorporating at least one aperture allowing the lower portion of the supported twist-lock to protect below the plate; wherein said support member (15) is selectively movable out of alignment with an axis of rotation of the twist-lock.
    Type: Application
    Filed: December 28, 2007
    Publication date: December 23, 2010
    Inventor: Cameron Hay
  • Patent number: 7851712
    Abstract: A measuring instrument for the gravimetric determination of moisture has a housing with a test compartment arranged in the housing, as well as a weighing device installed in the housing. The weighing device includes a sample receiver that is disposed inside the test compartment when in the measuring position. A radiation source arranged in the test compartment which during a test process serves to heat the sample placed on the sample receiver. A suction device, arranged adjacent to the test compartment, remove moisture and any other volatiles given off by the sample during the measurement process providing a more stable flow pattern in the test compartment.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: December 14, 2010
    Assignee: Mettler-Toledo AG
    Inventor: Paul Lüchinger
  • Patent number: 7847202
    Abstract: A top-pan scale with a scale pan which is supported on at least one force transducer (7) of a force measurement system (5) and with a corner load sensor which outputs a signal if the weighing goods are positioned eccentrically on the scale pan. The corner load sensor (10) has a flat underside via which it can be placed on, or attached to, the scale pan or a bottom pan of the scale. The corner load sensor also has a flat upper side on which a scale pan (4) can be placed or attached. The corner load sensor (10) is connected to a positionally fixed electronic processor (22) via a force-feedback-free connection (21). Embodiments of the corner load sensor can therefore be used for a wide variety of scale designs and can be retrofitted easily.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: December 7, 2010
    Assignee: Sartorius AG
    Inventors: Michael Mueller, Werner Schulze
  • Patent number: 7813973
    Abstract: An inventory monitoring system measures changes in weight of an inventory stored on one or more scales. The inventory items are divided into classes by weight, and the system determines the maximum number of items that can be in a combination while maintaining a distinct combined weight. Items are then removed or added, and the change in weight on the scales is correlated to a change in the number of inventory items to track the number of items removed or added over time. In a combined system, scanners are employed to track inventory received or sold, and data from the scanners relating to the items in the inventory is filtered out for comparison to the inventory changes indicated by changes in weight. The system has particular utility for monitoring inventories of cigarettes.
    Type: Grant
    Filed: October 4, 2004
    Date of Patent: October 12, 2010
    Assignee: Inventrol LLC
    Inventor: Larus Gudbjartsson
  • Publication number: 20100181118
    Abstract: A device that adds and removes a load of a built-in weight to and from a load measuring mechanism of a weighing apparatus built-in weight latched in a weight holder that performs a lifting and lowering operation to a fixed portion. During calibration, gas is supplied from a gas supply and exhaust portion to a bag to increase volume of the air bag. At this point, the weight holder is lowered against the repulsive force of a coil spring, and the built-in weight is latched in the load receiver, thereby performing the calibration. After the calibration, an electromagnetic valve is opened to exhaust the gas from the bag. As a result, the weight holder is lifted by the repulsive force of the coil spring, and the weighing apparatus enters a usual weighing mode.
    Type: Application
    Filed: July 24, 2007
    Publication date: July 22, 2010
    Inventors: Naoto Izumo, Akiyoshi Oota
  • Patent number: 7698877
    Abstract: Packaging machine and discharging device for a packaging machine, and a method for filling bags by means of a packaging machine, wherein a bag to be filled is filled by means of a filling element and the filled bags are taken off by means of a bag take-off device and transferred to a discharging device. The discharging device comprises a conveying device for conveying off the bags filled with bulk goods, wherein at least one monitoring device for monitoring the tightness of the filled bags is provided which is associated with the conveying device. Said monitoring device comprises a weight sensor which captures a measure for the bulk material escaping from a bag to determine a parameter for the bag leakiness.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: April 20, 2010
    Assignee: Haver & Boecker OHG
    Inventor: Alois Combrink
  • Publication number: 20090151474
    Abstract: A system and method detect when a product container from which a product is dispensed is empty or nearly empty, and provides a notification of the product status. The system includes a load cell that deflects at a first rate of distance per unit load when a load less than a critical load is positioned to be weighed by the load cell, and a load cell bracket positioned such that the free end of the load cell contacts the load cell bracket when a load substantially equal to or greater than the critical load is positioned to be weighed by the load cell. The load cell bracket may prevent the load cell from further deflection, or it may permit deflection of the load cell at a second rate of distance per unit load when the load cell is in contact with the load cell bracket.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 18, 2009
    Applicant: Ecolab Inc.
    Inventors: Richard J. Mehus, Bruce W. Weber, Ben J. Wiltsie
  • Patent number: 7547852
    Abstract: A hydraulic scale for planter calibration is disclosed. The hydraulic scale includes a tube having indicia disposed thereon. The tube has a substantially closed bottom and a substantially open top. The indicia disposed on the tube include at least one scale having a zero line. The tube is configured to float substantially upright when positioned in a liquid, such that the zero line is substantially aligned with the surface of the liquid. A non-zero line portion of the scale is configured to align with the surface of the liquid when at least one of seeds and feed are placed within the tube.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: June 16, 2009
    Inventor: Maximo Sallovitz
  • Patent number: 7533799
    Abstract: A self-service checkout terminal includes a scanner and a weight scale. The customer passes each item past the scanner to identify the item and obtain weight data for that item from a centralized database, including a mean weight and a standard deviation. An error value is calculated from the measured weight of each item and the weight data. The error value of all items scanned during the common transaction are summed to produce an accumulated error for the particular weight scale during that transaction. This accumulated error is compared to a threshold value to determine whether a fault condition exists at the weight scale.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: May 19, 2009
    Assignee: NCR Corporation
    Inventor: Thomas V. Edwards
  • Publication number: 20090107208
    Abstract: A calibration weight arrangement (4, 104) for an electronic balance with a force-transmitting mechanism (1) has a calibration weight (3, 103) adapted to be coupled to the force-transmitting mechanism. The arrangement also has a transfer mechanism and a drive source to manipulate the calibration weight in a guided movement. The drive source includes an actuator (18) cooperating with the transfer mechanism and at least one piezoelectric element (19) which drives the movement of the actuator. The piezoelectric element interacts with a drive wheel (17, 117) that is centrally positioned relative to the calibration weight arrangement and drives a likewise centrally positioned shaft (16, 126). The interaction between the piezoelectric element and the drive wheel occurs during the advance movement in one direction through the repeated engagement and release of a frictional contact force.
    Type: Application
    Filed: December 23, 2008
    Publication date: April 30, 2009
    Applicant: Mettler-Toledo AG
    Inventors: Dominique Genoud, Peter Schilling, Thomas Koeppel, Matthias Scheu
  • Patent number: 7513139
    Abstract: The calibration weight arrangement for an electronic balance with a force-transmitting device (1), includes a calibration weight (14) capable of coupling to the force-transmitting device (1). The calibration weight (14) is moved vertically by a transfer mechanism and a drive source to establish and to release the force-transmitting contact between the calibration weight (14) and the force-transmitting device (1). The transfer mechanism has at least one resetting element (22, 37, 38, 40, 43) and a lifting system configured as a knee joint linkage (17, 117, 217). The resetting element (22, 37, 38, 40, 43) and the lifting system work together to arrest and cushion the calibration weight (14) if the balance is shocked, dropped or hit.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: April 7, 2009
    Assignee: Mettler-Toledo AG
    Inventors: Dominique Genoud, Christoph Latzer
  • Patent number: 7497137
    Abstract: In a method for monitoring and/or determining the condition of a force-measuring device with at least one housing that has an interior space and with at least one force-measuring cell installed in the interior space of the at least one housing, at least one parameter of the atmospheric climate of the interior space is measured with at least one sensor that is arranged in the interior space of the housing or with at least one sensor that is arranged at the housing, wherein said parameter is of a kind that has an influence on the operating lifetime of the force-measuring cell; and a sensor signal corresponding to the measured parameter of the atmospheric climate of the interior space is transmitted to a computing unit and/or to a data output device.
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: March 3, 2009
    Assignee: Mettler-Toledo AG
    Inventors: Jean-Maurice Tellenbach, Daniel Aepli, Helmut Bäumel
  • Patent number: 7491905
    Abstract: Described is a multi-optic scanner that can detect and/or measure weight placed on its vertical plate. In one embodiment, a portion of the vertical plate is positioned under a portion of a horizontal plate so that a force exerted on the vertical plate is transferred, whole or in part, to the horizontal plate. In alternate embodiments, one or more sensors are coupled to the vertical plate for detecting a force on the plate. The sensors can be coupled to an alert, such as an audible signal, to warn an operator of a misread weight.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: February 17, 2009
    Assignee: Symbol Technologies, Inc.
    Inventor: Chin-Hung Jwo
  • Patent number: 7478551
    Abstract: A calibration weight 100 for a gravimetric measuring instrument includes a calibration weight base module 101 which is equipped with at least one attachment area 106. The calibration weight 100 further has at least one positioning means 104 and at least one transfer element 105. The attachment area 106 allows supplemental weights 102 to be built onto the calibration weight base module 101; the positioning means 104 serves to position the calibration weight 100 in relation to the calibration weight arm 20; and the transfer element 105 serves as the place through which the transfer mechanism lever 31 applies its force and effects a transfer.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: January 20, 2009
    Assignee: Mettler-Toledo AG
    Inventors: Jean-Maurice Tellenbach, Urs Loher, Richard Bruderer
  • Patent number: 7454304
    Abstract: A peak weight detecting system and method which analyzes signals generated by a load cell indicating a load within a container. The signal indicates a weight which is compared with a stored peak weight. If the new weight exceeds the stored weight, the new weight is verified by comparison to a weight indicated by a second signal from the load cell. If the weights indicated by the first and second signals are within a specified percentage of each other, the weight indicated by the first signal may displace the stored peak weight and may be stored as a new peak weight.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: November 18, 2008
    Assignee: Digi-Star, LLC
    Inventors: Steven L Johansen, Jerome Bump
  • Patent number: 7441436
    Abstract: A weighing apparatus calibration method uses a test mass, a material and a terminal to calculate and compare the total weight of the test mass and material to determine if the total capacity of the weighing apparatus has been calibrated. A system for managing calibration of a weighing apparatus is also described.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: October 28, 2008
    Assignee: Mettler-Toledo, Inc.
    Inventors: Doug Bliss, John Moorman, Venus Simmons
  • Publication number: 20080257655
    Abstract: A magnet unit includes a first magnetic pole (7a), a second magnetic pole (7b) and a third magnetic pole (7c) at a center between the first magnetic pole (7a) and the second magnetic pole (7b), providing an E-shaped configuration. In the magnet unit, a first magnet is defined between the first magnetic pole (7a) and the third magnetic pole (7c) by connecting two electromagnets (71aa, 73aa) with each other through a permanent magnet (72a), while a second magnet is defined between the second magnetic pole (7b) and the third magnetic pole (7c) by connecting two electromagnets (71ba, 73ba) with each other through a permanent magnet (72b). With this configuration, it is possible to reduce a deviation in the length of respective magnetic paths from the permanent magnets (72a, 72b) up to their respective magnetic poles. By controlling exciting currents to the respective magnetic poles.
    Type: Application
    Filed: May 10, 2005
    Publication date: October 23, 2008
    Inventors: Hiroaki Ito, Mimpei Morishita, Yosuke Tonami
  • Publication number: 20080110681
    Abstract: A force-measuring device (100) with at least one housing (20) has an interior space and at least one force-measuring cell (110) installed therein. At least one parameter characterizing an existing high-frequency electromagnetic field is determined by a sensor (50) arranged in the interior space or a sensor arranged outside of the housing, the sensor being adapted for detecting high-frequency electromagnetic fields. After an electromagnetic field is detected and compared to a threshold value, a response action of the force-measuring device is triggered if the detected parameter value exceeds the threshold value.
    Type: Application
    Filed: October 30, 2007
    Publication date: May 15, 2008
    Applicant: Mettler-Toledo AG
    Inventors: Hans-Peter Von Arb, Jean-Christophe Emery, Daniel Reber, Cyrill Bucher, Stefan Buehler, Hansruedi Kuenzi
  • Patent number: 7370730
    Abstract: A system and method for scanning goods and loading the goods into receptacles by a user includes a scanner and a plurality of loading stations. The scanner scans the goods, and the scanned goods are placed on the loading stations. Each loading station separately obtains a weight of the goods within each respective loading station. In response to each of the weights obtained by all of the plurality of loading stations exceeding a predetermined first weight, the self-checkout system is configured to initiate a first alarm detectable by the user, and in response to the first alarm being initiated, the self-checkout system is configured to prevent additional goods from being scanned by the scanner. In response to each of the weights obtained by all of the plurality of loading stations being below or substantially at a predetermined second weight, the self-checkout system is configured to allow additional goods to be scanned by the scanner after the first alarm is initiated.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: May 13, 2008
    Assignee: International Business Machines Corporation
    Inventors: Michael J. Johnson, Jessica King Snead
  • Patent number: 7361850
    Abstract: A method for determining the quantity of items in a container is described, where each item has the same nominal weight located between upper and lower weight limits. The method comprises the following steps: (a) attempting to pack a pre-determined quantity, n, of the items to the container, the predetermined quantity, n, being selected such that the product of (n+1) and the lower weight limit exceeds the product of n and the upper weight limit and such that the product of n and the lower weight limit exceeds the product of (n?1) and the upper weight limit; (b) measuring the weight of the actual quantity of items packed in the container in step (a); and, (c) dividing the value of the weight ascertained in step (b) by the nominal weight to determine the actual quantity of items packed in the container in step (a).
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: April 22, 2008
    Assignee: Ishida Europe Limited
    Inventor: Bernard Austin Timings
  • Patent number: 7340372
    Abstract: In order to determine the dielectric constant of a layer deposited on a semiconductor wafer (2), the density of the layer is obtained. To obtain that density, the wafer (2) without the layer is weighed in a weighing chamber (4) in which a weighing pan (7) supports the wafer on a weighing balance. The weight of the wafer is determined taking into account the buoyancy exerted by the air on the wafer (2). Then the layer is deposited on the wafer (2) and the weighing operation repeated. Alternatively a reference wafer may be used. If the material of the layer is known, the weight of the layer can be used to derive its density using a thickness measurement. Alternatively, if the density is known, the thickness can be obtained.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: March 4, 2008
    Assignee: Metryx Limited
    Inventor: Robert John Wilby
  • Patent number: 7193162
    Abstract: The present invention is directed to an apparatus and method for measuring the weight of material such as rock, earth, wood, pulp, grain, gravel, sand, ore, cement etc. being processed or moved by an apparatus such as a conveyor, apron conveyor or bucket elevator driven by an electrical motor. The apparatus measures the electrical energy consumed by the motor powering the apparatus during operation of the apparatus and uses a calibration formula derived from an average of no-load readings plus up to 2.0 standard deviations for converting the power consumption of the motor to tonnage per hour of raw material processed by the apparatus. A continual record is kept of all “No-load” and “start-up load” time during the recording process and these figures are totalized along with tonnage for the recording period.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: March 20, 2007
    Assignee: Glowe Consulting Services Inc.
    Inventors: Stephen McIsaac, Ronald William Glowe
  • Patent number: 7176389
    Abstract: An electronic balance includes a sample plate for placing a sample, a load detecting unit for determining a weight of the sample, a sensitivity calibration mechanism having a calibration weight disposed under the sample plate for applying a load of the calibration weight to the load detecting unit, a weight holding member with a spring property for holding the calibration weight when the load of the calibration weight is not applied to the load detecting unit, and a pressing member disposed above the weight holding member for restricting an upper movement of the weight holding member. The load detecting unit converts a load of the sample placed on the sample plate into an electrical signal according to a sensitivity coefficient to determine the weight of the sample. The sensitivity coefficient is calibrated when the load of the calibration weight is applied to the load detecting unit.
    Type: Grant
    Filed: June 1, 2004
    Date of Patent: February 13, 2007
    Assignee: Shimadzu Corporation
    Inventor: Atsushi Iiduka
  • Patent number: 7166808
    Abstract: An apparatus is provided for measuring the weight force of a bale in a baler wherein the bale moves between a first position, within the baling chamber, and a second position, within a wrapping apparatus carried by the baler chassis. A measurement device, which is connected to a data processing device, is provided, for measuring a measurement parameter influenced by the weight force of said bale in each of said first and second positions and developing a signal representative of the weight of the bale at those positions. The processing device is set up to calculate the weight force of the bale taking into account a first signal output from the measurement device when the bale is in the first position and a second signal output from the measurement device when the bale is in the second position.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: January 23, 2007
    Assignee: Deere & Company
    Inventors: Jean Viaud, Stephane Biziorek
  • Patent number: 7159297
    Abstract: It is an object of the present invention to provide a method of manufacturing a rotor for an electric motor, in which displacement of the center of gravity is prevented. According to a feature of the present invention, a rotor for an electric motor comprises an inner core fixed to a rotating shaft of the rotor and multiple coil units respectively fixed to the inner core, wherein the coil unit has an outer core, a bobbin and a winding wound on the bobbin, and wherein weight of outer cores as well as winding units (the bobbin and the winding wound thereon) is respectively measured and stratified into several groups, necessary number of the outer cores and winding units are respectively picked out from the same stratified group and then such outer cores and winding units are assembled to the inner core.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: January 9, 2007
    Assignee: Denso Corporation
    Inventors: Shingo Inaishi, Shinya Ishikawa, Hirotsugu Douba, Ryuichi Kanbe
  • Patent number: 7105751
    Abstract: A calibration assisting device includes a reference load data storage means 30d for storing, as a reference load data, the reference load data produced from load sensor 10 when a desired reduced quantity is generated in a vehicle weight measuring device 40, a load data fetching means 30a1 for fetching the load data produced from the load sensor 10, a tire load data fetching means 30a2 for fetching a tire load data produced from the vehicle weight measuring device 40, a reduced quantity detecting means 30a3 for detecting a reduced quantity on the basis of the tire load data thus fetched, a calibration information creating means 30a4 for creating calibration information on the basis of the load data fetched by the load data fetching means 30a1 corresponding to the tire load data and the reference load data stored in the reference load data storage means 30d when the reduced quantity is detected, and a calibration information outputting means 30a5 for outputting the calibration information produced from the cali
    Type: Grant
    Filed: May 18, 2004
    Date of Patent: September 12, 2006
    Assignee: Yazaki Corporation
    Inventors: Masayuki Terada, Michiharu Matsuda, Atsushi Kobayashi, Kazunori Uemori
  • Patent number: 7076990
    Abstract: A load cell type weight measuring device includes a load cell formed of a strain member provided with a plurality of strain gauges and deforming according to a load applied to a load receptacle. The load cell type weight measuring device converts an output of a Wheatstone bridge circuit formed of the respective strain gauges into a weight value to display. Two weight receptacles are attached to the strain member. It is arranged such that when a load is applied to one of the load receptacles, a strain at a portion of the strain member provided with the strain gauges becomes smaller than that when the load is applied to the other of the load receptacles.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: July 18, 2006
    Assignee: Shimadzu Corporation
    Inventor: Nobuyuki Yoshikuwa
  • Patent number: 7020577
    Abstract: In order to determine the dielectric constant of a layer deposited on a semiconducotr wafer (2), the density of the layer is obtained. To obtain that density, the wafer (2) without the layer is weighed in a weighing chamber (4) in which a weighing pan (7) supports the wafer on a weighing balance. The weight of the wafer is determined taking into account the buoyancy exerted by the air on the wafer (2). Then the layer is deposited on the wafer (2) and the weighing operation repeated. Alternatively a reference wafer may be used. If the material of the layer is known, the weight of the layer can be used to derive its density using a thickness measurement. Alternatively, if the density is known, the thickness can be obtained.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: March 28, 2006
    Assignee: Metryx Limited
    Inventor: Robert John Wilby
  • Patent number: 7012198
    Abstract: A balance includes a weighing cell with a vertically movable load receiver, a weighing pan to receive a weighing load, and a support element to couple the weighing pan to the vertically movable load receiver of the weighing cell. A cantilever arm with a seat for at least one calibration weight is solidly connected to the support element. The balance has a coupling arrangement that constrains the support element with low-friction mobility to the load receiver at three points forming a triangle in a plane that extends orthogonal to the symmetry plane of the weighing cell, wherein the triangle is symmetric to the symmetry plane of the weighing cell. Under the coupling arrangement, the support element is solidly supported on the load receiver in the direction in which the weighing load is acting.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: March 14, 2006
    Assignee: Mettler-Toledo GmbH
    Inventors: Beat Lüdi, Eduard Fringeli, Paul Lüchinger
  • Patent number: 7010449
    Abstract: To provide a method with which one or more digital load cells of a load-receiving device can be replaced without the weighing system having to be newly calibrated, it is proposed that, in the event of a replacement, at least one of the previous load cells remains in the weighing system and in that, once the replacement has taken place, a new set of parameters is determined for the load cell used as the replacement via the central control unit on the basis of the data of the replaced load cell, which the control unit receives from the load cell remaining in the system, and is stored in the parameter memories of all the load cells.
    Type: Grant
    Filed: December 13, 2004
    Date of Patent: March 7, 2006
    Assignee: Bizerba GmbH & Co. KG
    Inventor: Gebhard Pfeiffer
  • Patent number: 7002346
    Abstract: A method (10) permits determining the temperature in a magnetic resonance check weighing system (24) of a sample in a container (22) on a production line at the time of magnetic resonance testing. Method (10) includes the steps of determining a time-temperature correction factor for the sample in the container (50), measuring the temperature of the composite sample and the container at a time other than the time of magnetic resonance testing (70), and applying the correction factor to the temperature of the composite sample and container at a time other than the time of magnetic resonance testing (80).
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: February 21, 2006
    Assignee: The BOC Group, Inc.
    Inventors: Alexander Schaepman, Vincent Bons, Paulus C. J. M. Hendrickx, Jozef A. W. M. Corver
  • Patent number: 6956175
    Abstract: A scale including an event data discrimination and collection system for continuously monitoring a weight of an infant placed on the scale platen, which may be configured as a bed. Load cells are used to continuously monitor infant weight from time placed on the scale platen, so that sudden apparent weight spikes sensed by the load cells but attributable to events involved in patient care may be discarded as artifact, while gradual weight changes reflective of infant physiology are accumulated by the scale controller and used to provide a current weight for the infant.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: October 18, 2005
    Inventors: Paul C. Daly, Gerald J. Petrotto
  • Patent number: 6864437
    Abstract: A weight set for an electronic balance has at least two different weights (15, 25, 26, 27, 28, 29) and a weight-receiving device (19) with receiving positions for each of the weights (15, 25, 26, 27, 28, 29). The weight set (2) has one lifter unit (17) per weight for the vertical movement of each individual weight (15, 25, 26, 27, 28, 29). The lifter units, which are equipped with a weight-seating device and reach through the weight-receiving device (19), are identical and are arranged parallel to each other in the weight set (2).
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: March 8, 2005
    Assignee: Mettler-Toledo GmbH
    Inventor: René Weber
  • Patent number: 6838624
    Abstract: An electronic weighing scale includes a body for use on a horizontal surface for a weighing operation, a display on the body for displaying a measured weight, and an electronic weighing circuit in the body for measuring the weight of a person standing on the body. The weighing circuit includes a zero-reset circuit for resetting the measurement to zero prior to a weighing operation. The body includes a zero-reset member incorporating an electrical switch operable by the zero-reset member to trigger the zero-reset circuit. The zero-reset member engages the surface, when the body is placed on the surface, for operating the switch to trigger the zero-reset circuit.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: January 4, 2005
    Assignee: IDT Technology Limited
    Inventor: Raymond Chan
  • Publication number: 20040262047
    Abstract: An electronic balance includes a sample plate for placing a sample, a load detecting unit for determining a weight of the sample, a sensitivity calibration mechanism having a calibration weight disposed under the sample plate for applying a load of the calibration weight to the load detecting unit, a weight holding member with a spring property for holding the calibration weight when the load of the calibration weight is not applied to the load detecting unit, and a pressing member disposed above the weight holding member for restricting an upper movement of the weight holding member. The load detecting unit converts a load of the sample placed on the sample plate into an electrical signal according to a sensitivity coefficient to determine the weight of the sample. The sensitivity coefficient is calibrated when the load of the calibration weight is applied to the load detecting unit.
    Type: Application
    Filed: June 1, 2004
    Publication date: December 30, 2004
    Applicant: Shimadzu Corporation
    Inventor: Atsushi Iiduka
  • Patent number: 6818841
    Abstract: Disclosed is a weighing system that is capable of continually sensing load against a conveyor and a calibration system for the weighing system that is capable of applying a reference load to the weighing system without interrupting the ability of the weighing system to sense load against the conveyor.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: November 16, 2004
    Inventor: Ralph R. McDonald
  • Patent number: 6801866
    Abstract: A method for minimizing error in weight-measuring devices includes successively placing one or more standard test loads on the weighing device at a plurality of distinct testing positions located in about a peripheral of two-thirds of a weight-receiving surface of the weighing device, the loads being measured by the weighing device at discrete instances such that the testing positions are utilized individually to measure a selected load, determining the weight error displayed by the weighing device at each of the testing positions, summing the distinct measured weight errors into a summed error, and comparing such a summed error to a desired tolerance level, such that weighing devices exhibiting summed errors of excess of the tolerance level may be identified as being in need of corrective measures, including calibration.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: October 5, 2004
    Inventor: John C. Yarian
  • Patent number: 6792371
    Abstract: A system for calibrating a plurality of weighing installations of the kind having a working configuration of at least one working load cell (14) with a fixed side and a load-bearing sides, a support (16) for the fixed side, and a load (12) operatively mounted on the load-bearing side, comprises portable apparatus moveable between installations to be calibrated, and fixed apparatus at each installation. The portable apparatus includes a reference load cell (30) and a fluid ram (32), the fixed apparatus includes anchorage means (22) fast with the working load cell support (16), and the reference cell and the ram are removably connectable between the anchorage means and the load-bearing side of the working load cell to apply calibrating loads to the working load cell in its working configuration. As many rams and reference cells may be provided as there are working load cells for any weighing installation.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: September 14, 2004
    Inventor: Philip John Turner
  • Patent number: 6777624
    Abstract: An electronic balance provided with a self-diagnosis function comprises a connection port for connecting the electronic balance to an external communication terminal. When a self-diagnosis function is performed, the previously stored address in the electronic balance is used to connect the electronic balance over a line to a specific Web site through the external communication terminal connected to the connection port so as to transfer a diagnosis data to the Web site. At the Web site, the diagnosis data is evaluated and the evaluation result containing measures to be taken in response to the diagnosis data is returned. The electronic balance displays contents of the returned data on a display section.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: August 17, 2004
    Assignee: Shimadzu Corporation
    Inventor: Hiroshi Hamamoto
  • Patent number: 6770823
    Abstract: A system for check weighing the content of a blister strip which includes a guide adapted to receive a blister strip comprised of at least one blister, a punch aligned with the guide for receiving the at least one blister, an actuator engaged with the punch for driving the punch toward the blister strip, whereby the blister is punched from the blister strip, and a balance adapted to receive the punched blister for weighing the punched blister and generating a weight signal after subtracting a predetermined value representing the weight of an empty blister. An alternative method of determining the content of a blister strip comprises reflecting a beam of energy off of a blister strip and determining the height of the blister from the reflected energy. The measured height is compared to a predetermined height to derive the amount of powder contained therein.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: August 3, 2004
    Assignee: Smithkline Beecham Corporation
    Inventors: Charles Amick Buckner, III, Milton David Bynum, David Brian Moody, Michael Richard Strong, Thomas Scott Wilson
  • Patent number: 6722214
    Abstract: A method of controlling the evaporation of liquid in samples in an evaporating centrifuge, by monitoring the centrifugal force exerted on a sample holder containing a liquid sample having solid material dissolved or otherwise mixed therein. The centrifugal force is determined using a load cell, a strain gauge or, where relative movement between sample holder and rotor is permitted albeit with resilient restraint, the centrifugal force signal may be generated by a position sensing transducer. The speed of rotation is sensed by a further transducer and both force and speed signals are conveyed to a computer programmed to generate a process control signal for controlling the evaporation process therefrom. A preferred method of control involves determining the rate of change of weight with time and terminating the evaporation process when the rate of change drops to zero.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: April 20, 2004
    Assignee: Genevac Limited
    Inventor: Michael Cole
  • Patent number: 6713689
    Abstract: A method and method for fast weighing of items such as mailpieces with variable accuracy. The method includes a scale method having a platform connected to a load cell that provides an output signal to an analog-to-digital converter. The resulting digital output signal is processed by a low pass filter and analyzed by a microprocessor to determine weights of items on the platform. The microprocessor also determines postage amounts of items on the platform. The microprocessor also determines postage amounts as functions of the weights and outputs these postage amounts to a postage meter. The microprocessor determines the weights as the average of a sequence of digital output signal values if the average id not closer than D to any weight break, where D is the difference between a maximum output value and a minimum output value.
    Type: Grant
    Filed: July 9, 2002
    Date of Patent: March 30, 2004
    Assignee: Pitney Bowes Inc.
    Inventors: David J. Eaton, John E. Massucci, John P. Miller
  • Publication number: 20040050593
    Abstract: The invention comprises a balance (1) with at least one digital weighing cell (2, 3, 4, 5) and an evaluation unit connected to the balance. The digital weighing cell (2, 3, 4, 5) is provided with memory elements (12, 13, 14, 15) in which the weighing cell parameters and the system parameters of the balance (1) or code numbers formed thereof are stored in an unmanipulatable manner by known methods such as audit trail counters, for example. The evaluation device is embodied as a program controlled data processing device (7) and is directly connected to the balance (1) or weighing cells (2, 3, 4, 5) provided therein. The measured data of the digital weighing cells (2, 3, 4, 5) which are calibratable and/or not calibratable are read out by the program-controlled data processing device (7) during each weighing process (7), in addition to the stored weighing cell parameters and system parameters of the balance (1) or the codes formed thereof.
    Type: Application
    Filed: February 20, 2003
    Publication date: March 18, 2004
    Applicant: Hotting Baldwin Messtechnik GMBH
    Inventors: Helmut Baeumel, Reiner Schrod
  • Patent number: 6696649
    Abstract: The total weight of a plurality of resin products is set as a reference value, and a first upper-limit threshold and a first lower-limit threshold are respectively stored in a control circuit 38 on the upper limit side and the lower limit side with respect to the reference value. A second upper-limit threshold which is yet greater than the first upper-limit threshold and a second lower-limit threshold which is yet smaller than the first lower-limit threshold are stored in the control circuit 38. When the total weight of the resin products is greater than the first upper-limit threshold, a determination is made by the control circuit 38 as to whether or not the total weight of the resin products is yet greater than the second lower-limit threshold. Further, when the total weight of the resin products is less than the first upper-limit threshold, a determination is made by the control circuit 38 as to whether or not the total weight of the resin products is yet less than the second lower-limit threshold.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: February 24, 2004
    Assignees: Sumitomo Wiring Systems, Ltd., Sumidenso Platech, Ltd.
    Inventors: Norikazu Suzuki, Masaki Usui
  • Publication number: 20040026134
    Abstract: The invention is a device and means that reduces the amount of overloading and under-loading of plastic grocery bags. A bag rack has a scale attached to its base with the scale connected to an indicator. The plastic bag rests on the scale which weighs the contents of the bag as they are being added. The indicator checks the weight of the contents of the bag. If the contents are under the targeted weight an indicator is lit, when the targeted weigh is reached another indicator is lit, and if a “not to exceed weight” is reached a warning indicator is lit.
    Type: Application
    Filed: August 12, 2002
    Publication date: February 12, 2004
    Inventors: Dana D. Waggoner, Delbert J. Graf
  • Patent number: 6658921
    Abstract: Testing process and apparatus for determining absorption properties of a porous specimen. The porous specimen is brought in a predetermined state of contact with the body of water held by a reservoir, for inducing water absorption in the porous specimen. A weight of the porous specimen is monitored for a predetermined time period once the contact is established to produce weight data over time. The predetermined state of contact is maintained substantially constant during the time period by permanent circulation of water in the reservoir. The absorption properties of the porous specimen are determined as a function of the weight data over time.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: December 9, 2003
    Assignee: Universite du Quebec a Montreal
    Inventors: Paul Lavallée, Michel Küntz
  • Publication number: 20030106374
    Abstract: 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. The natural frequency of vibration of the spring and specimen are measured. The spring constant is calculated and compared with known masses having the same frequency and spring constant. When a match is found, the mass of the test specimen is known.
    Type: Application
    Filed: December 6, 2001
    Publication date: June 12, 2003
    Applicant: Honeywell International, Inc.
    Inventors: Jun Isobe, Al MacKnight, Vipul P. Patel
  • Patent number: 6576849
    Abstract: The invention disclosed consists of weighing apparatus and process that includes a new Calibration management utility to automate compliance testing to ISO 9000 requirements and has the “load cell symmetry”, “empty platform” and “test load” readings for each load stored on the weighing apparatus. This weighing apparatus makes periodic tests to determine the health of the load cells in the system, producing a log file to record events such as any detected failure, any suspicious reading, overload condition, or any user defined parameter, and is network enabled to be connected through a LAN via an Ethernet to the Internet.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: June 10, 2003
    Assignee: Mettler-Toledo, Inc.
    Inventors: Doug Bliss, Craig Stickel, James W. Bentz
  • Patent number: 6557391
    Abstract: A balance (1) has a weighing compartment (3) and a balance housing (4). The balance housing (4) contains a weighing cell (15) and forms a rear wall (13) and a floor (8) for the weighing compartment (3). A weighing-load carrier (2) is arranged on a cantilever arm (30) of the weighing cell (15). The cantilever arm (30) also holds a weight-receiving element (6) for calibration weights (7) of a calibration device (5). The weighing-load carrier (2) is releasably attached to a coupling arrangement (11) protruding from the cantilever arm (30) through passage openings (12) in the rear wall (13). The floor (8) extends without openings between the weight-receiving element (6) for the calibration weights (7) and the weighing-load carrier (2).
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: May 6, 2003
    Assignee: Mettler-Toledo GmbH
    Inventor: Paul Lüchinger