Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7337673 | Ultrasonic array probe apparatus, system, and method for traveling over holes and off edges of a structure Improved apparatus, systems, and methods for inspecting a structure are provided that use a probe with sled appendages and an axial braking system. The probe uses pulse echo ultrasonic signals to inspect the structure. The sled appendages permit the probe to contact... | 03/04/2008 |
| 7331233 | Method and apparatus for ultrasonic sizing of particles in suspensions A particle size distribution monitor, comprising: a transducer adapted to be a source of ultrasonic energy and positioned in contact with a suspension containing a percent by volume of particles in a liquid, the transducer transmitting ultrasonic energy through the ... | 02/19/2008 |
| 6898978 | Geometry for pulsed acoustic measurements of particle size An apparatus for making pulsed acoustic measurements to determine particle size in a sample (1) such as a colloid. The apparatus includes two electrodes (2) between which an electric voltage is applied to the sample. The voltage is applied in short pul... | 05/31/2005 |
| 6829959 | Apparatus and method for moving a sensor over a workpiece The apparatus and method for moving a sensor over a workpiece includes a sensor, and an actuating member. The sensor, such as a non-destructive test sensor, is carried by the actuating member, and the actuating member is at least partially disposed within a housing.... | 12/14/2004 |
| 5623100 | Ultrasonic inspection and imaging intstrument In an ultrasonic inspection and imaging instrument, a pulse generator and a burst wave generator are provided in association with the activation of an ultrasonic probe by the pulse generator and in response to a measurement value obtained from a signal re... | 04/22/1997 |
| 5553499 | Ultrasonic microscope having an automatic focusing adjustment mechanism Ultrasonic wave converged by an acoustic lens is made incident onto a sample and wave reflected from the sample is received and converted into received electric signal by a transducer. A part of this electric signal is picked up by a gate section and the ... | 09/10/1996 |
| 5351544 | Measuring apparatus using an ultrasonic wave to provide flaking state detection for a specimen on the basis of freqency analysis of a wave reflected by the specimen A measuring apparatus using an ultrasonic wave according to the invention transmits an ultrasonic wave pulse into a specimen, receives the echo reflected by the specimen and converts it into an electric signal. The components of the electric signal that r... | 10/04/1994 |
| 5339691 | Ultrasonic test system An ultrasonic system for determining the quality of concrete under water hout inaccuracies caused by electromagnetic interference from the ultrasonic generator. An ultrasonic generator applies pulses to the concrete. An ultrasonic detector detects the ul... | 08/23/1994 |
| 4631683 | Acoustic detection of contact between cutting tool and workpiece A system and method for monitoring vibrations of a machine tool metal-cutting tool insert and interpreting them to promptly detect the initial touch to the workpiece and signal the tool to stop advancing before marring the surface. The signal generated by... | 12/23/1986 |
| 4581937 | Method of suppressing unwanted indications in automated ultrasonic testing The invention relates to a method of suppressing unwanted indications in automated ultrasonic testing of a test piece. In order to improve the suppression of unwanted indications, in particular in the case of extended statistical suppression, a variable discri... | 04/15/1986 |
| 4482859 | Object displacement sensor and device for measuring the rotation speed and vibration frequency of a rotor An object displacement sensor specifically adapted for high speed counting of passing nonmagnetic objects is disclosed which has a resonant circuit made up of at least one inductive element 2 and a condensor whose one plate consists of a conductive surfac... | 11/13/1984 |
| 4423634 | Device for the activation of an apparatus for measuring acoustic emission by detection of background noise An apparatus for measuring acoustic emission is activated only at critical periods which are determined by detection of the background noise from a reference level. An acoustic emission transducer continuously transmits a signal to a detection circuit whi... | 01/03/1984 |
| 4386530 | Ultrasonic imaging equipment An ultrasonic imaging equipment employing a transducer which includes an acoustic propagating medium formed with a concave surface at one end thereof and formed with a piezoelectric thin film on the other end thereof opposing to the one end, and a medium ... | 06/07/1983 |
| 4366712 | Ultrasonic testing of sheet and plate stock Sheet or plate stock is used as to defects by a row of ultrasonic transmitting transducers on one side and receiving transducers on the other. The transmitting transducers receive frequency-modulated signals via individual buffers, and the receiving trans... | 01/04/1983 |
| 4361042 | Digital type ultrasonic holography apparatus A digital type ultrasonic holography apparatus includes a clock generator for generating a clock pulse signal having a fixed period, a transducer for transmitting spike-like ultrasonic pulses toward an object in synchronism with trigger pulses derived thr... | 11/30/1982 |
| 4307612 | Method and means for ultrasonic inspection Ultrasonic inspection of a structure such as steel tubing is enhanced by moving the ultrasonic wave transmitter and receiver through the pipe and periodically injecting an ultrasonic pulse into the tube. Reflected waves are received during a sample period... | 12/29/1981 |
| 4213184 | Signal processor for processing ultrasonic receiver signals A signal processor is provided which uses an analog integrating circuit in conjunction with a set of digital counters controlled by a precision clock for sampling timing to provide an improved presentation of an ultrasonic transmitter/receiver signal. The... | 07/15/1980 |
| 4198866 | Method and device for ultrasonic inspection of materials A method for ultrasonic inspection of materials in which a reception and processing of ultrasonic vibrations reflected from a material being inspected is followed by separating signals from noise at a level that for each period of radiating ultrasonic vib... | 04/22/1980 |
| 4187725 | Method for ultrasonic inspection of materials and device for effecting same According to the proposed method for ultrasonic inspection of materials, a eception and processing of ultrasonic vibrations reflected from a material being tested are followed by separating signals from noise at a preset level, which is carried out by mean... | 02/12/1980 |
| 4131857 | Autocorrelated pulse processor Electro-optical gaging system has an electronic camera which develops a raw camera pulse having a width that approximates the dimension between edges of an object imaged on the camera. A camera pulse processor employs edge detecting techniques using raw p... | 12/26/1978 |
| 4044606 | Sensing thickness of a thin body disposed between two diverse surfaces The thickness of a layer of oil on water is obtained in digital form, which in one embodiment is recorded on a visually identifiable analog type display chart. An underwater ultrasonic transducer arrangement produces and receives pulses, which are digital... | 08/30/1977 |
