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| Number | Title | Issue Date |
| 4161885 | Measuring apparatus for measuring the roll gap in gauge-controlled roll stands Apparatus is provided for measuring the roll gap in roll stands with automatic gap control. The apparatus comprises two relatively movable components which may interfit telescopically. The two components have respective measuring surfaces at one of which ... | 07/24/1979 |
| 4161715 | Method and apparatus for measuring the interior dimensions of a hollow body An apparatus for measuring the interior dimensions of the walls of a hollow body. The apparatus is insertable into a restricted opening of the hollow body and includes means for transmitting a beam of electromagnetic energy toward an interior wall of the ... | 07/17/1979 |
| 4141347 | Real-time ultrasonic B-scan imaging and Doppler profile display system and method Pulsed real-time B-scan ultrasonic method and apparatus are disclosed together with pulsed Doppler Ulrasonic method and apparatus. The B-scan apparatus includes a pulse operated transmitter and receiver operating at a first frequency, and the Doppler appa... | 02/27/1979 |
| 4137778 | Method and apparatus for producing ultrasonic waves in light absorbing surfaces of workpieces In order to stabilize the acoustic wave amplitude in a workpiece, where such acoustic wave is generated by a laser beam pulse transmitted upon the workpiece surface, laser pulses preceding the laser pulse used for acoustic evaluation are utilized to clean... | 02/06/1979 |
| 4137779 | Methods and arrangement for the determination of crack-depths in ultrasonic non destructive testing A method of determining depth propagation of a defect in a body by ultrasonic materials testing wherein a first angle probe having an ultrasonic wave transmitting oscillator produces a scatter signal at structural inhomogeneities of a body formed with a d... | 02/06/1979 |
| 4126203 | Air-coupled seismic detector A method and apparatus for improved detection of reflected seismic energy through detection of air pressure variations in air above an air/earth surface interface. One form of apparatus suitable for detection in air of seismic energy waves emanating from ... | 11/21/1978 |
| 4112775 | Fillet weld inspection system A device for underwater detection of flaws in welds, especially lap welds as distinguished from butt welds wherein a filleted weld is made, said device embodying ultrasonic transducers arranged to emit and receive a sonic beam at angles such as to pass th... | 09/12/1978 |
| 4107244 | Method and apparatus for repairing damaged surface of refractory lined vessel A method and apparatus for repairing lining which comprises transmitting microwaves modulated by an antenna inserted into the vessel to the surface of the heated refractory lining in the refractory lined vessel, detecting the reflected waves, detecting th... | 08/15/1978 |
| 4106346 | Grey-level ultrasonic imaging Apparatus and method for grey-level ultrasonic imaging employing a storage oscilloscope. In medical diagnostic uses, a patient originated ultrasonically reflected wave is converted into an electrical signal which is so modulated as to result in grey-level... | 08/15/1978 |
| 4098131 | Method and apparatus for increasing the speed of ultrasonic pulse-echo testing In order to increase the speed at which a workpiece is tested by the ultrasonic pulse-echo method, the dead time between individual measurement time intervals is shortened by providing a minimum predetermined time interval selected for the specific test c... | 07/04/1978 |
| 4089225 | System for residual tire life prediction by ultrasound A system, preferably a pulse echo reflection system, for residual tire life prediction by ultrasound includes: a transmitter transducer; means to provide pulses of electrical energy to the transmitter transducer, that converts the electrical pulses into p... | 05/16/1978 |
| 4080839 | Testing method using ultrasonic energy A convergent ultrasonic beam is formed by an emitter made as a sphere and directed to a piece under test. Having been reflected from the surface of the piece and from the defect, the ultrasonic beams are separated in space. The ultrasonic beam carrying in... | 03/28/1978 |
| 4052977 | Methods of and apparatus for ascertaining the characteristics of motion of inaccessible moving elements A method and apparatus for obtaining an audible signal containing information as to the characteristics of at least one moving element situated internally of a living body and in which a transmitting transducer fed with an electrically generated signal of... | 10/11/1977 |
| 4049954 | Device for accurate measurement of the dimensions of an object by ultrasonic waves In a device for accurately measuring the dimensions of metallic tubes and the like by supersonic waves in a liquid medium, typically water, obstructions providing reflecting boundaries that are partially reflecting and partially transparent for acoustic w... | 09/20/1977 |
| 4033182 | Method for measuring biaxial stress in a body subjected to stress inducing loads A method for measuring stress in test articles including the steps of obtaining for a calibrating specimen a series of transit time differentials between the second wave echo for a longitudinal wave and the first wave echo for each of a pair of shear wave... | 07/05/1977 |
| 4028933 | Acoustic microscope A scanning acoustic microscope wherein a high frequency acoustic plane wave is focused by an acoustic lens to scan an object at the focal plane and is then recollimated by a second acoustic lens, detected with a piezoelectric detector, and the detected ac... | 06/14/1977 |
| 4022055 | Pulse-echo method and system for testing wall thicknesses A method and system for improving the pulse-echo type of testing to determine wall thicknesses. It is particularly applicable to pipes. There is a pulse directed transversely to the wall so that reflections from the inner and outer surfaces will indicate ... | 05/10/1977 |
| 4012946 | Ultrasonic weld inspection system An ultrasonic weld inspection system has an ultrasonic transmitting transducer and an ultrasonic receiving transducer on the same side of the weld. A beam of ultrasonic energy from the transmitting transducer directed into the weld center impinges upon a ... | 03/22/1977 |
| 3978713 | Laser generation of ultrasonic waves for nondestructive testing An object is tested for thickness or for presence and location of flaws by impacting a pulsed laser beam on the surface of the object so as to generate ultrasonic waves by rapid heating of a thin surface layer thereon. The reflected ultrasonic echo in the... | 09/07/1976 |
| 3948248 | Method of measuring ocular pulse A method of obtaining a reading of the ocular pulse in its unbiased, natural state by transmitting continuous wave ultrasonic energy to the eye from a source spaced from the eye, receiving said energy reflected back from said eye, and detecting a modulati... | 04/06/1976 |
| 3937067 | Measurement of angles Angles and angular displacements of ultrasonic beams are measured by using a probe to transmit the beam to a point on a surface, particularly the surface of material being subjected to non-destructive examination, from which the beam is reflected to a rec... | 02/10/1976 |
| 3934577 | Fetal heart rate monitoring apparatus Ultrasonic apparatus for monitoring heartbeat activity from electrical Doppler signals derived from heartbeat motion comprising means for selective passing of the electrical Doppler signals at one of two operable bandpass ranges to a retunable resonant ci... | 01/27/1976 |
