Patents by Inventor James M. Kendall, Jr.
James M. Kendall, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5136881Abstract: A method and apparatus for sensing wave flow across a surface wherein at least two pressure levels are sensed and combined to provide a representation of waves within the flow. In the preferred embodiment holes bored through the aircraft surface at an interval of one-half the wavelength of the flow being measured introduce pressure perturbations into a cavity so they may acoustically interfere. The interfering waveform is sensed by at least one microphone disposed in the cavity.Type: GrantFiled: August 16, 1990Date of Patent: August 11, 1992Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventor: James M. Kendall, Jr.
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Patent number: 4960351Abstract: Hollow shells of high uniformity are formed by emitting liquid through an outer nozzle and gas through an inner nozzle, to form a hollow extrusion, by flowing the gas at a velocity between about 1.3 and 10 times the liquid velocity. The natural breakup rate of the extrusion can be increased to decrease shell size by applying periodic perturbations to one of the materials prior to exiting the nozzles, to a nozzle, or to the extrusion.Type: GrantFiled: October 24, 1986Date of Patent: October 2, 1990Assignee: California Institute of TechnologyInventors: James M. Kendall, Jr., Taylor G. Wang, Daniel D. Elleman
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Patent number: 4820503Abstract: The improved, heterogeneous catalysts are in the form of gas-impervious, hollow, thin-walled spheres (10) suitably formed of a shell (12) of metal such as aluminum having a cavity (14) containing a gas at a pressure greater than atmospheric pressure. The wall material may be, itself, catalytic or the catalyst can be coated onto the sphere as a layer (16), suitably platinum or iron, which may be further coated with a layer (18) of activator or promoter. The density of the spheres (30) can be uniformly controlled to a preselected value within .+-.10 percent of the density of the fluid reactant such that the spheres either remain suspended or slowly fall or rise through the liquid reactant.Type: GrantFiled: June 13, 1985Date of Patent: April 11, 1989Assignee: California Institute of TechnologyInventors: Taylor G. Wang, Daniel D. Elleman, Mark C. Lee, James M. Kendall, Jr.
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Patent number: 4804796Abstract: Improved, heterogeneous, refractory catalysts are in the form of gas-impervious, hollow, thin-walled spheres (10) suitable formed of a shell (12) of refractory such as alumina having a cavity (14) containing a gas at a pressure greater than atmospheric pressure. The wall material may be itself catalytic or a catalytically active material coated onto the sphere as a layer (16), suitably platinum or iron, which may be further coated with a layer (18) of activator or promoter. The density of the spheres (30) can be uniformly controlled to a preselected value within .+-.10 percent of the density of the fluid reactant such that the spheres either remain suspended or slowly fall or rise through the liquid reactant.Type: GrantFiled: April 8, 1987Date of Patent: February 14, 1989Assignee: California Institute of TechnologyInventors: Taylor G. Wang, Daniel D. Elleman, Mark C. Lee, James M. Kendall, Jr.
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Patent number: 4701436Abstract: Improved, heterogeneous, refractory catalysts are in the form of gas-impervious, hollow, thin-walled spheres (10) suitable formed of a shell (12) of refractory such as alumina having a cavity (14) containing a gas at a pressure greater than atmospheric pressure. The wall material may be itself catalytic or a catalytically active material coated onto the sphere as a layer (16), suitably platinum or iron, which may be further coated with a layer (18) of activator or promoter. The density of the spheres (30) can be uniformly controlled to a preselected value within .+-.10 percent of the density of the fluid reactant such that the spheres either remain suspended or slowly fall or rise through the liquid reactant.Type: GrantFiled: March 18, 1986Date of Patent: October 20, 1987Assignee: California Institute of TechnologyInventors: Taylor G. Wang, Daniel D. Elleman, Mark C. Lee, James M. Kendall, Jr.
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Patent number: 4643854Abstract: An apparatus is provided for forming gas-filled spheres of metal, glass or other material, which produces spheres (12) of uniform size and wall thickness in a relatively simple system. The system includes concentric nozzles, including an inner nozzle (18) through which gas flows and and an outer nozzle (20), which jointly define an annular passageway (50) through which a liquid flows. The flow rates are adjusted so that the gas flows at greater velocity than does the liquid, out of their respective nozzles, e.g. three times as great, in order to produce an extrusion (30) which undergoes axisymmetric oscillations resulting in the pinch off into hollow spheres with very uniform spacing. The system is useful not only where gas-filled spheres are required, but also is useful to accurately control the dispensing of solid, liquid, or gaseous materials.Type: GrantFiled: August 15, 1984Date of Patent: February 17, 1987Assignee: California Institute of TechnologyInventors: James M. Kendall, Jr., Taylor G. Wang, Daniel D. Elleman
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Patent number: 4576926Abstract: The improved, heterogeneous catalysts are in the form of gas-impervious, hollow, thin-walled spheres (10) suitably formed of a shell (12) of metal such as aluminum having a cavity (14) containing a gas at a pressure greater than atmospheric pressure. The wall material may be, itself, catalytic or the catalyst can be coated onto the sphere as a layer (16), suitably platinum or iron, which may be further coated with a layer (18) of activator or promoter. The density of the spheres (30) can be uniformly controlled to a preselected value within .+-.10 percent of the density of the fluid reactant such that the spheres either remain suspended or slowly fall or rise through the liquid reactant.Type: GrantFiled: April 23, 1984Date of Patent: March 18, 1986Assignee: California Institute of TechnologyInventors: Taylor G. Wang, Daniel D. Elleman, Mark C. Lee, James M. Kendall, Jr.
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Patent number: 4449901Abstract: An apparatus is described for producing a lightweight structural material (12), by forming gas-filled shells (38) of molten material from a matrix of nozzles (22) that form shells of very uniform size at very uniform rates. The matrix of molten shells coalesce into a multi-cell material of controlled cellular structure. The shells can be of two different sizes (38, 44) that are interspersed, to form a multicell material that has a regular cell pattern but which avoids planes of weakness and localized voids. The gas (50) in the shells can be under a high pressure, and can be a fire extinguishing gas.Type: GrantFiled: July 6, 1982Date of Patent: May 22, 1984Assignee: California Institute of TechnologyInventors: Taylor G. Wang, Daniel D. Elleman, James M. Kendall, Jr.
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Patent number: 4313745Abstract: A method of forming hollow glass spheres S shaped by the effects of surface tension acting on bubbles of glass in its molten state; the method is characterized by the steps of establishing a downwardly flowing stream of air accelerated at a one-G rate of acceleration through a drop tower 10, introducing into the stream of air free-falling bubbles B of molten glass, and freezing the bubbles in the stream as they are accelerated at a one-G rate of acceleration.Type: GrantFiled: December 24, 1980Date of Patent: February 2, 1982Inventors: Alan M. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Lovelace, James M. Kendall, Jr.