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| Number | Title | Issue Date |
| 7284445 | Strain waveform control apparatus, strain waveform regulating member, strain waveform control method by using strain waveform control apparatus, and strain waveform control program A strain waveform control apparatus of the present invention is adapted to horizontally supporting a printed circuit board over a trestle and cause strains on the printed circuit board by a dropped rigid ball with buffer blocks being located on both surfaces of the ... | 10/23/2007 |
| 7216519 | Strain monitoring for part quality analysis A device for determining the quality of a part includes a sensor for detecting a strain on a selected portion of a part forming machine. A controller utilizes the detected amount of strain to make a determination regarding the quality of a corresponding part. In one... | 05/15/2007 |
| 7042228 | Transducer in-situ testing apparatus and method The present invention is directed to an apparatus and method for a measurement system for the testing of transducers, and more particularly to the testing of piezoelectric transducers. The measurement system includes a transducer, a feedback amplifier coupled to the... | 05/09/2006 |
| 6993977 | Remote structural material evaluation apparatus A method of unobtrusive evaluation of structural material integrity without requiring physical contact for referencing integrity values, comprising: directing an impact source at said structural material; obtaining signal information from the structural material by ... | 02/07/2006 |
| 6499350 | Turbine engine foreign object damage detection system A Foreign Object Damage (FOD) detection system is disclosed for detecting and analyzing ultrasound or stress waves emitted when an object enters the intake of a turbine engine and impacts one or more of the blades in the engine. Upon detection the FOD det... | 12/31/2002 |
| 6239588 | Method of fabricating a magnetic shield for a plastic molded electricity meter frame Magnetic shields for plastic molded electricity meter frames are positioned to substantially block external magnetic fields from adversely affecting operation of meter components. The shield can be utilized with either electromechanical or electronic ener... | 05/29/2001 |
| 6131469 | Shear force measurement device for beds and method The present invention is a device to measure the parallel shear force on a mattress. The device has a motor, a weighted object, a high friction material pad, and a load cell. The motor moves by pushing and pulling the weighted object on the high friction ... | 10/17/2000 |
| 6125216 | Strain isolated optical fibre bragg grating sensor A strain isolated optical fibre Bragg grating sensor (1) has an optical fibre (2) provided at or adjacent one end (2a) with the Bragg grating (3). An open mouth cap (4) surrounds the fibre end (2a) and region provided with the Bragg grating (3) at a spaci... | 09/26/2000 |
| 5932810 | Passive peak deflection sensor A passive deflection gauge to detect peak deflection in a structural material or system since a given time is disclosed. The gauge includes any type of mechanical deflection sensor using a moveable or extensible core for measuring deflection. A stop moves... | 08/03/1999 |
| 5633466 | Maximum value storage sensor The object of the present invention is to provide a maximum value storage sensor when detecting the maximum strain by generating an invariable electrical resistance change correlative to the strain of the detection object in a conductive body having a plu... | 05/27/1997 |
| 5461927 | Optical fiber strain sensor for measuring maximum strain An optical fiber strain sensor is provided which remembers the maximum stn a structure has experienced in a given timeframe. A pair of multi-mode optical fibers with flat ends meet end-to-end within a microbore capillary tube with which the fibers have f... | 10/31/1995 |
| 5461926 | Single-ended optical fiber strain sensor for measuring maximum strain An optical fiber strain sensor is provided which remembers the maximum stn a structure has experienced in a given timeframe. A reflective surface is fixed at one location on the structure, and a multi-mode optical fiber with a flat end is fixed at anothe... | 10/31/1995 |
| 5086651 | Strain monitoring apparatus and methods for use in mechanical structures subjected to stress Devices and methodology are provided for measuring mechanical strain in a structural member. The devices and methodology utilize a material which undergoes a change in phase when strained so that measurement of the phase change indicates strain. Preferabl... | 02/11/1992 |
| 4984469 | Amplitude measurement device for viscoelasticity analysis An apparatus for providing an indication of the amplitude of a length signal having a top peak, a bottom peak and an intrinsic offset and being indicative of viscoelasticity of a sample. A peak measurement circuit is provided for measuring values of top a... | 01/15/1991 |
| 4868411 | Signal conversion circuit A signal conversion circuit converts variations in resistance into an electrical signal. The conversion circuit comprises both a bridge circuit and a single operational amplifier with a capacitor between them to store voltage samples produced by an unbala... | 09/19/1989 |
| 4813320 | Method and apparatus for detecting a sheet strip material misfeed condition A plurality of individual frames or stampings provided in a sheet strip material by a stamping device are passed in proximity to a sensing device. As each individual frame or stamping is passed in proximity to the sensing device, the sensing device provid... | 03/21/1989 |
| 4671124 | Load monitor for cyclic machine A load monitor for a cyclic machine has a peak load signal detector the output of which is displayed indefinitely on an analog meter. On each cycle of the machine, the analog load signal is converted to a digital signal and the digital signal is converted... | 06/09/1987 |
| 4643030 | Torque measuring apparatus A torque wrench having a torque plug integral with the back side of the torque wrench handle and with strain sensing elements mounted on the torque plug and connected to signal processing circuits supported by the handle which control a digital display un... | 02/17/1987 |
| 4633720 | Load monitoring system for progressive dies A press control system monitors and is responsive to the loads associated with individual die stations in a progressive die. The system detects chipped, dull, or excessively loaded portions of the progressive die and provides automatic quality monitoring ... | 01/06/1987 |
| 4461182 | Load measuring apparatus Apparatus which measures loads imposed on load carrying members, and particularly such members in presses, to indicate the peak load reached during a press cycle, has circuits for amplifying the electrical signal from a sensing device such as a strain gag... | 07/24/1984 |
| 4145933 | Fatigue failure load indicator An indicator for recording the load at which a fatigue specimen breaks during the last cycle of a fatigue test. A load cell is attached to the specimen which is alternately subjected to tension and compression loads. The output of the load cell which is p... | 03/27/1979 |
| 4116050 | Press load meter A press load meter according to the present invention employs strain gauges as stress detectors. Outputs of the stress detectors are analogously processed until they are amplified and the amplified signals are digitally processed in a multiplexed form wit... | 09/26/1978 |
| 4074772 | Torquing tool control circuit The control circuit receives a signal from a torque measuring device provided on the tool and determines the proper shut off point for the tool. The circuit controls not only the tool shut off but also the rate of application of torque by employing a puls... | 02/21/1978 |
| 4062227 | CW ultrasonic bolt tensioning monitor This invention is a CW ultrasonic device for measuring frequency shifts of the peak of a mechanical resonance in a body. One application of the device is measuring the strain in a bolt. It also has other applications such, for example, as measuring the th... | 12/13/1977 |
| 4048848 | Load monitoring system A load monitoring system for force carrying members, such as pitmans of production presses, which is adapted to indicate directly in tons the loading incurred by the member during its successive operating strokes. The system further includes load limiting... | 09/20/1977 |
| 4016744 | Applied instrumentation providing tabletting compression force There is disclosed a method and apparatus for standardizing, in terms of a pre-established range of acceptable in vitro release and/or in vivo response, production of tabletted formulations which have a dependency on tablet hardness, through control of th... | 04/12/1977 |
| 3962910 | Method and apparatus for fastener tension inspection A fastener tension inspection system for use with torque producing power tools such as nut runners, screwdrivers, or the like. The inspection system includes a means for measuring torque or other tension proportional function applied to a fastener and a m... | 06/15/1976 |
