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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 5635679 | Device and method for determining weighing conditions of dynamic weighing device In a dynamic weighing device including a weight signal treating filter for measuring the weight of an article while the article is conveyed by a weighing conveyer, a device and a method of automatically determining an optimum time point for reading the we... | 06/03/1997 |
| 5625170 | Precision weighing to monitor the thickness and uniformity of deposited or etched thin film A time delayed differential weighing procedure used with an electronic analytical balance is optimized for samples exhibiting a small change in mass, for example from deposition, etching, plating or corroding, relative to the sample mass to minimize all s... | 04/29/1997 |
| 5621667 | Lift task analysis system A lift task analysis system includes a sensor having a retractable cable grasped by the hands of a participant. The participant moves in accordance with a selected lifting task and, in doing so, move the cable end correspondingly. The sensor generates an ... | 04/15/1997 |
| 5550751 | Expert system for detecting high impedance faults An expert detection system includes a method and apparatus for detecting high impedance faults occurring on a distribution circuit coupled to an AC power source. Based upon an expert's knowledge of high impedance fault behavior and the performance of vari... | 08/27/1996 |
| 5509293 | Dynamic payload monitor A method for dynamically measuring and indicating payload weight for a machine having at least one lift cylinder for elevating a payload carrier is provided. The method includes the steps of lifting a load of known mass during calibrating and sensing a ca... | 04/23/1996 |
| 5321634 | Automatic thin-film measuring apparatus In an automatic thin-film measuring apparatus, the zero point of a precision balance is corrected according to directions from a data processing unit before and after the weight of a semiconductor substrate is measured, the surface temperature of the semi... | 06/14/1994 |
| 5308931 | Hysteresis-compensated weighing apparatus and method A digital scale is compensated for hysteresis by characterizing an envelope pattern of increasing and decreasing linearity attributes thereof defining the limits of hysteresis error. Polynomial expressions define this envelope pattern and a correction pro... | 05/03/1994 |
| 5258931 | Precision electronic absolute and relative position sensing device and method of using same A novel position sensing device and novel method for determining position use an electronic memory to retain a look up table for calibrated position indicia on a scale. The position indicia are preferably arranged along the scale so that at least two indi... | 11/02/1993 |
| 5191543 | Electronic balance with calibrating device An electronic balance with a measured value receiver, a digital signal processing unit, a display unit and a calibrating device controlled by the digital signal processing unit (18) for placing on and lifting off a calibrating weight by use of a motor tha... | 03/02/1993 |
| 5166892 | Device for compensating for time-dependent error due to creep and like of measuring apparatus A device used in an apparatus, such as weigher, pressure gauge or the like, for essentially measuring a force, which utilizes a flexural member of elastic material for detecting the force by converting its deflection or strain caused by application of the... | 11/24/1992 |
| 5056050 | Method for determining the necessity of adjusting a high-resolution electronic balance In a process according to the invention for automatic calibration and/or linearization of a high-resolution electronic balance, point values are assigned by a function to the disturbance variables (parameters) that can affect the weighing result. A calibr... | 10/08/1991 |
| 5020356 | Method and apparatus for measuring characteristics of a multilayer product A method and apparatus are disclosed wherein a plurality of basis weight sensors are interleaved with one or more processing stations used to conjoin or apply one or more layers to a base substrate to form a multilayer product such that a sensor is locate... | 06/04/1991 |
| 4939679 | Recalibrating an elevator load measuring system Elevator load is computed from sensors. These sensors provide load signals. The load, defined by a stored load equation, is the product of those signals and a gain signal summed with an offset signal. Load computation using those signals is augmented by a... | 07/03/1990 |
| 4909338 | Method and apparatus for scale calibration and weighing A scale utilizes a plurality of load cells positioned beneath a weighing platform for determining the weight of objects placed upon the platform. During a weighing operation, each load cell generates a voltage proportional to the response of said cell to ... | 03/20/1990 |
| 4890246 | Electronic balance with calibrating system In high-resolution electric balances a certain residual temperature coefficient remains even with a good correction of the temperature-dependent errors of the measured value sensor. The invention therefore is with respect to a balance with a built-in cali... | 12/26/1989 |
| 4858161 | Method for the automatic calibration of a high-resolution electronic balance The calibration process is initialized as a function of the past measurement results. The time to the next calibration is dependent on the quality of the calibrations in the past. Before the calibrating of the balance, the program checks a number of param... | 08/15/1989 |
| 4817003 | Apparatus for detecting and indicating the balance of a rotary body in a machine tool The present invention relates to an apparatus for detecting and indicating the balance of a rotating body such as a grinding wheel, a spindle or the like in a machine tool such as a grinding machine. The apparatus comprises an original-point detecting mea... | 03/28/1989 |
| 4812806 | Vehicle and method of indicating attainment of maximum axle load A road vehicle has a transducer which provides an output signal representing movement of an axle relative to a chassis of the vehicle. The output signal is compared with a reference signal to produce an indicator signal which is applied to means for indic... | 03/14/1989 |
| 4796212 | Load cell type, weight-measuring device A load cell type, weight-measuring device includes a load cell for generating an electrical signal corresponding to an applied weight, an analog-to-digital converting circuit for converting an output signal from the load cell to a digital data, and a data... | 01/03/1989 |
| 4760539 | Method of calibrating a weighing apparatus A method for calibrating an electronic scale includes sampling the output of the scale a predetermined number of times to generate a number of average readings for the weight that is placed on the scale, comparing two successive average readings and selec... | 07/26/1988 |
| 4660663 | Method of calibrating a weighing apparatus within an enclosure A method for recalibrating an electronic scale mounted within an enclosure which includes a display and a plurality of switches set to a position representing the calibrated digital output of the scale when the scale is placed in a first and second weight... | 04/28/1987 |
| 4661920 | Automatic zero-adjustment method and apparatus A method and apparatus for automatically adjusting the zero point of a weighing machine includes producing, in the form of a digital value, an initial zero-point correction value when the weighing machine is free of a load. The difference value between an... | 04/28/1987 |
| 4529050 | Combination weighing machine with adaptive signal correction A combination weighing machine has a plurality of weigh scales which provide signals representative of the weight of product in each scale. A search control receives the weight signals and selects a combination of the scales which together compose a charg... | 07/16/1985 |
| 4507742 | Aircraft weight and balance system with automatic loading error correction A weight and balance system which automatically compensates for loading errors while the aircraft is stationary. A weight signal is generated from the outputs of a pair of inclinometers mounted on adjacent opposite ends of a landing gear member which bend... | 03/26/1985 |
| 4504963 | Automatically calibrating meat analysis device An apparatus, system and method are provided for determining the percentage of fat in a meat sample through the use of X-ray radiation techniques. An automatic calibration feature eliminates the need for manual potentiometer adjustments for accommodating ... | 03/12/1985 |
| 4464725 | Temperature compensated measuring system A temperature-compensated measuring system employs an internal signal-processor to provide high accuracy measurements, correct over a wide range of temperatures. In a calibration mode, the system employs the signal-processor to provide mathematical consta... | 08/07/1984 |
| 4425974 | Method for counting signatures employing a weighing technique A stack of signatures is delivered to a weighing platform which measures bundle weight. A stored bundle weight is subtracted from the measured bundle weight to yield a difference which is compared against the stored reference weight of an individual signa... | 01/17/1984 |
| 4375838 | Electronic balance An electronic balance includes a weighing means for producing digital output signals as a measured value in response to a force induced upon a tray, a first memory for storing the mass of a reference weight, a discriminator for signalizing the existence a... | 03/08/1983 |
| 4368790 | Statistical weighing In the retailing of articles it is necessary to ensure that packages containing a plurality of articles fall within predetermined weight ranges. The invention is particularly but not exclusively concerned with the packing of bacon but applies to other art... | 01/18/1983 |
| 4341275 | Measuring apparatus with electromagnetic force compensation and capacitive position sensor An electromagnetically compensating measuring apparatus, as in force measuring or weighing devices, wherein a compensation coil is wound upon a coil form movable in the air gap of a stationary permanent magnet system having a pole plate, a capacitive posi... | 07/27/1982 |
| 4316517 | Weighing scale with improved zero correction A stabilization of the zero point of a digital display in a periodically operating weighing scale is accomplished by obtaining the difference between the then-present weight signal S and a stored reference signal, for example the tare value. Resulting dif... | 02/23/1982 |
| 4310893 | Digital scale This invention relates to an improved digital scale arrangement which employs apparatus for generating an electrical analog signal representing the weight on the scale mechanism. The analog signal is then converted to a digital representation of the weigh... | 01/12/1982 |
| 4189017 | Weighing apparatus including digitalization error correcting means An improved weighing apparatus of the electromagnetic load compensation type is disclosed, including a correction loop connected between the output terminal of the synchronizer and the input terminal of the pulse length modulator for varying the regulated... | 02/19/1980 |
| 4159747 | Temperature-compensated weighing apparatus A weighing system is disclosed of the electromagnetic compensation return-to-neutral type including first and second series-connected compensation coils connected with the weighing pan support, a supply of compensating current connected with the compensat... | 07/03/1979 |
| 4137976 | Method and apparatus for bale weight control The total weight of fibrous material delivered to a packaging device, such as staple textile fiber delivered to a baling press, is controlled so as to facilitate achieving more uniform package weight in accordance with a method and through the use of an a... | 02/06/1979 |
| 4080657 | Weight measuring system with automatic gain correction In electronic measuring systems the accuracy of measurement is affected by drift not only of the zero but of the gain due to temperature changes, aging and supply conditions. The invention provides an automatic gain correction means so as to maintain an a... | 03/21/1978 |
| 3976150 | Endless conveyor belt load measurement system and method of automatically calibrating same This invention relates to an endless conveyor belt load measurement system and a method of automatically calibrating the same using a digital computer. Measuring means are provided to measure movement of the conveyor belt and scale means are provided to m... | 08/24/1976 |
| 3939332 | Zero indicator for plural scale systems In a plural scale system such as a parts counter having a minor scale for measuring the weight of a known number of sample parts and a major scale for measuring the weight of an unknown number of parts to be counted, apparatus for indicating when the scal... | 02/17/1976 |
