1
Lawrence C Lynnworth: Ultrasonic flowmeters using waveguide antennas. Panametrics, Kenway & Jenney, June 29, 1982: US04336719 (177 worldwide citation)

Waveguide antennas for ultrasonic flowmeters are described in which at least one pair of antennas is used to interrogate a flowing fluid. The waveguides are parallel, each pair defining a plane of interrogation which is parallel or nearly parallel to the flow.


2
Lawrence C Lynnworth: Method and apparatus for measuring fluid characteristics using surface generated volumetric interrogation signals. Panametrics, Lahive & Cockfield, April 5, 1988: US04735097 (149 worldwide citation)

A method and apparatus for measuring fluid characteristics use a non-invasive ultrasonic system for generating spatially extended signals into a volume of a fluid and detecting said signals for measuring the characteristic of the fluid. The generated waves are Rayleigh-like surface waves creating, i ...


3
Lawrence C Lynnworth, John L Seger, James E Bradshaw: Ultrasonic system for measuring fluid impedance or liquid level. Panametrics, Kenway & Jenney, March 23, 1982: US04320659 (110 worldwide citation)

An ultrasonic system that measures either the impedance of a fluid or liquid level utilizes moderately directional, bulk SV mode sound waves generated by a transducer and propagated in a homogeneous, flaw-free solid member. The SV wave propagates in the solid along a zigzag path that reflects at a s ...


4
Lawrence C Lynnworth, Kenneth A Fowler, Dana R Patch: Sealed, matched piezoelectric transducer. Panametrics, Kenway & Jenney, October 27, 1981: US04297607 (86 worldwide citation)

An ultrasonic transducer assembly for making measurements within a fluid, the assembly including a transducer, a backing member and a matching member all supported within a cylindrical metal housing with the transmitting face of the housing being sealed with a thin sealing element formed of a non-re ...


5
Lawrence C Lynnworth: Marginally dispersive ultrasonic waveguides. Panametrics, Lahive & Cockfield, November 3, 1992: US05159838 (71 worldwide citation)

Methods and apparatus for ultrasonically measuring selected physical parameters of a test material or structure are achieved by selecting and configuring waveguides for transmitting extensional, longitudinal, shear, Rayleigh and Lamb waves into media in a marginally dispersive manner. Marginally dis ...


6
Lawrence C Lynnworth: Snap-on flow measurement system. Panametrics, Lahive & Cockfield, January 19, 1993: US05179862 (70 worldwide citation)

A snap-on flow measurement system includes a block which attaches to a conduit and positions at least one transducer for launching and receiving acoustic signals along a precisely defined path through a flowing fluid. In one embodiment adapted to small tubes, two transducers are coupled to the tube ...


7
Lawrence C Lynnworth: Ultrasonic buffer/waveguide. Panametrics, Michael I Nutter McClennon & Fish Falkoff, April 11, 2000: US06047602 (63 worldwide citation)

A waveguide couples ultrasonic energy from a source on one side of a fluid-bounding wall, such as a conduit, into fluid on the other side of the wall. The waveguide has a buffer that couples to the source, and a seat with an exit face, while an intermediate portion contains a redirecting surface for ...


8
Saul A Jacobson, Lawrence C Lynnworth, James M Korba: Differential correlation analyzer. Panametrics, Lahive & Cockfield, November 29, 1988: US04787252 (57 worldwide citation)

A flow meter, or flow path intervalometer, transmits a transmission signal modulated with digital pseudo-noise or similar code. The received signal is correlated with the transmitted signal at successive times to produce a correlation function having a peak at a time to equal to the propagation time ...


9
Lawrence C Lynnworth: Ultrasonic measuring system with isolation means. Panametrics, Kenway & Jenney, January 25, 1977: US04004461 (56 worldwide citation)

A device for performing ultrasonic measurements on liquid flowing within a conduit having walls of relatively high acoustic impedance material. The conduit is split into two separate segments with the emitting transducer in one segment and a receiving transducer in the other segment. The space betwe ...


10
Lawrence C Lynnworth: Ultrasonic transducer system with crosstalk isolation. Panametrics, Lahive & Cockfield, May 14, 1996: US05515733 (52 worldwide citation)

Transducers are mounted in a housing or vessel to propagate signals along a fluid measurement path, and a plurality of massive elements are placed between transmitting and receiving transducers in the acoustic propagation path through the solid body of the housing or vessel to remove crosstalk. In a ...