Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7194907 | Method for measuring part thickness having an external coating using impedance matching delay lines An ultrasonic transducer for measuring a part with a coating having at least one acoustic transducer, and a buffer delay line having an impedance matched to an impedance of the coating. ... | 03/27/2007 |
| 7021145 | Acoustic transducer An acoustic transducer for measuring a property of a fluid includes an acoustic pulse generator and buffer assembly. The buffer assembly is between the pulse generator and the fluid. The buffer assembly is composed of a core and a sleeve shrink fitted over the core ... | 04/04/2006 |
| 6515554 | High-frequency circuit device and communication apparatus Electrodes are formed on both top and bottom surfaces of a dielectric plate and grounded coplanar lines, as transmission lines, are formed on the top surface of the dielectric plate. A plurality of micro-strip lines, each composed of high-impedance lines ... | 02/04/2003 |
| 6323740 | High-frequency circuit device and communication apparatus Electrodes are formed on both top and bottom surfaces of a dielectric plate and grounded coplanar lines, as transmission lines, are formed on the top surface of the dielectric plate. A plurality of micro-strip lines, each composed of high-impedance lines ... | 11/27/2001 |
| 5828274 | Clad ultrasonic waveguides with reduced trailing echoes Ultrasonic buffer rods are useful for on-line process control of industrial material processes at elevated temperatures. In order to increase the signal-to-noise ratio in the reflected ultrasonic waves revealing the information of the condition of the mat... | 10/27/1998 |
| 5241287 | Acoustic waveguides having a varying velocity distribution with reduced trailing echoes Acoustic buffer rods are useful in the nondestructive ultrasonic evaluation of materials. In order to reduce the occurrence of spurious signals in the reflected acoustic waves forming an acoustic "image" of a sample, it is proposed to design buffer rods s... | 08/31/1993 |
| 5173667 | Acoustic wave transmission media delay line having internally disposed absorber channels A multiple-reflection, long-path wave transmission device is fabricated from a single crystal silicon plate by micromachining straight walled rectangular cavities into the plate to reflect ultrasonic waves along an extended transmission path defined by th... | 12/22/1992 |
| 4829270 | Compansion system An improved compansion system that more effectively increases the dynamic range of other circuit elements. The system includes both a compression circuit to limit the input signal amplitude for a circuit element, such as a filter, and an expansion circuit... | 05/09/1989 |
| 4821004 | Method for the elimination of spurious echos in electro-acoustic delay lines using bulk waves and delay line applying this method Methods are disclosed for the elimination of spurious echos in electro-acoustic delay lines using bulk waves. The method consists in etching an array, formed of hollows and peaks on a reflecting side of a delay line of this type, the difference in height ... | 04/11/1989 |
| 4819215 | Electric signal transfer element An electrical signal transfer element is disclosed. This element consists of a ultrasonic wave solid propagation medium, input and output transducers and backing members. The ultrasonic wave solid propagation medium has a ultrasonic wave propagation dista... | 04/04/1989 |
| 4733204 | Ultrasonic-wave delay element An ultrasonic-wave delay line element comprises a pentagonal delay medium body formed by cutting at an angle of about 45° a part of the major surface defined by a rectangular shape having two longer sides and two shorter sides, and has a pair of input an... | 03/22/1988 |
| 4691178 | Ultrasonic delay line An ultrasonic delay line including an input transducer for producing a sound wave depending on an input voltage, a delay medium for transmitting the sound wave produced by the input transducer and an output transducer for receiving the sound wave transmit... | 09/01/1987 |
| 4684906 | Solid ultrasonic delay line There is disclosed a solid ultrasonic delay line comprising a solid ultrasonic delay medium on which polygonal multiple-reflective surfaces are formed. An input transducer for radiating longitudinal waves is disposed on one of the reflective surfaces. The... | 08/04/1987 |
| 4525692 | Electroacoustic delay lines An ultrasonic delay line fabricated from a solid transmission medium is configured to provide (2n+3) reflections of the desired signal at five reflective facets of an irregular polygon. The reflective pattern tends to allow maximum surface area available ... | 06/25/1985 |
| 4510470 | Electro-acoustic delay line operating in transmission A transmission-type electro-acoustic delay line comprises an acoustic medium delimited by a cylindrical lateral surface, a plane terminal surface on which are fixed two symmetrical transducers, and a focusing terminal surface in the form of a spherical ca... | 04/09/1985 |
| 4499439 | Bifurcated electroacoustic delay lines A bifurcated electroacoustic delay line exhibits at least a pair of substantially identical branches, each assuming a generally pentagonal profile. Each branch is configured to provide (2n+3) reflections of a desired wave at five reflective facets. The re... | 02/12/1985 |
| 4488128 | Bifurcated electroacoustic delay line with diagonal coupling A bifurcated electroacoustic delay line includes first and second branches of a transmission medium, the branches being joined along respective common sides. Bonded to the common sides of the branches are respective first and second input and first and se... | 12/11/1984 |
| 4488127 | Bifurcated electro-acoustic delay lines having transducers bonded at an area of bifurcation A bifurcated electroacoustic delay line exhibits at least a pair of substantially identical branches, each assuming a generally pentagonal profile. Each branch is configured to provide (2n+3) reflections of a desired wave at five reflective facets. The re... | 12/11/1984 |
| 4467295 | Solid ultrasonic delay line There is disclosed a solid ultrasonic delay line which comprises a delay medium having two parallel major faces and at least three end faces intersecting the major faces, an input transducer bonded to one of the end faces and polarized in a direction para... | 08/21/1984 |
| 4392115 | Volume magnetostatic wave device The volume magnetostatic wave device comprises a unidirectional-radiation transducer composed of equidistant microstrips connected to a polyphase transformer and coupled to a ferrimagnetic wafer which is subjected to a polarizing magnetic field.... | 07/05/1983 |
| 4349794 | Shallow bulk acoustic wave devices Acoustic wave devices employing shallow bulk acoustic waves rather than surface acoustic waves, to provide higher frequencies of operation and other significant advantages, such as less susceptibility to aging and less sensitivity to surface contamination... | 09/14/1982 |
| 4316161 | Wideband low triple transit delay line Electroacoustic apparatus is described incorporating a substrate having a transducer on an upper surface and a transducer on a lower surface positioned for receiving bulk acoustic waves; substrate taper along with transducer geometry are combined to provi... | 02/16/1982 |
| 4301431 | Miniature delay line having low direct coupling In a miniaturized delay line constituted by a single crystal through which an ultrasonic beam passes and by two electroacoustic transducers, the direct coupling between the input and the output of the delay line is attenuated by means of a molded shieldin... | 11/17/1981 |
| 4242653 | Triple transit suppression for bulk acoustic delay lines Electroacoustic apparatus is described incorporating a substrate having a plurality of transducers on an upper surface and a plurality of transducers on a lower surface each positioned for receiving bulk acoustic waves from a respective transducer on the ... | 12/30/1980 |
| 4119934 | Bulk acoustic wave delay line A bulk acoustic wave delay line adapted to increase triple-transit signal suppression by selective aperture limiting, the device including a bulk acoustic wave-supporting body having a planar end face at each end of the bulk acoustic wave propagation path... | 10/10/1978 |
| 4103263 | Triple-transit-suppressed bulk acoustic wave delay line A mode-converting type bulk acoustic wave delay line adapted to suppress triple transit signals and provide response tailoring, the device including a body of acoustic wave supporting material with at least one mode-converting planar surface capable of re... | 07/25/1978 |
| 4099147 | Bulk acoustic delay device A bulk acoustic delay device incorporating a transmitting transducer, a substrate, and two receiving transducers is described which may reduce the amplitude of undesired received reflected bulk acoustic waves by positioning one of the two receiving transd... | 07/04/1978 |
| 4034317 | Ultrasonic delay lines and method of making the same A multiple reflection type solid ultrasonic delay line which comprises a solid ultrasonic delay medium in the form of a thin flat plate having input and output transducers and reflection elements formed on the periphery thereof, and one or more arc groove... | 07/05/1977 |
| 4016512 | Wide band bulk acoustic wave delay line A bulk acoustic wave delay line including a body of acoustic wave supporting material and having at least one planar surface capable of reversably converting longitudinal wave mode acoustic energy to shear wave mode acoustic energy, the delay line also in... | 04/05/1977 |
| 3942139 | Broadband microwave bulk acoustic delay device A thin film piezoelectric transducer generates bulk mode ultrasonic elastic waves which propagate into a transmission medium, such as silicon. The wave is reflected back towards the first transducer by a reflecting surface. A second transducer is located ... | 03/02/1976 |
