Other

The United States of America As Represented by the Administrator of the

Alan M Lovelace

Cyril Feldstein

Tage O Anderson

Robert G James

Daniel L Flamm

Carl R Ryan

James M Kendall, Jr

Fortunato J Micale

Mark A Cole

Emanuel Tward

John W Vanderhoff

Patricia A Brown

Theodore J Wydeven

Mohamed S El-Aasser

Taher Daud

Robert A Richter

Paul J Shlichta

Carlisle R Dolland

Alfred Cellier

Ja H Lee

Daniel W Trimble

Gilbert W Lewis

M Kudret Selcuk

Thomas Wood Andrews

Virgil H Culler

Donald W Crawford

Gene R Petersen

Frank Hohl

Robert L Dotts

John T Polhemus

Robert W Hartop

Ralph C Chernoff

Krishna M Koliwad

William A Wall, Jr

Jack W Holt

Leslie H Gard

Kenneth E Wood

Douglas C Huey

Lit N Ma

Joan Vernikos

John Bellavia, Jr

John O Kane

Wilbur H Cash, Jr

Paul A Dillard

Walter M Fritz

Dan R Lott

Gary B Turner

Samuel Merrbaum

Robert E Ives

Dale M Kornfeld

Wayne W Schubert

Miles Melvin Bruce, Jr

Minoo N Dastoor

Kenneth L Orloff

Peter Paul Pryor, Jr

Haruo Yanagita

Pramode K Bhagat

Vic C Wu

Bill C Chen

Norman S Cohen

George C Shanks

Harold P Holway

Leon D Strand

Curtis E Tucker

Apparatus for preloading a spring loaded threaded member. The apparatus is formed of three telescoping tubes. The innermost tube has means to prevent rotation of the threaded member. The middle tube is threadedly engaged with the threaded member and by axial movement applies a preload thereto. The outer tube engages a nut which may be rotated to retain the threaded member in axial position to maintain the preload.

Apparatus for accurately preloading auger attachment means for frangible

A solar energy collector focuses solar energy onto a solar oven which is attached to a mixer which in turn is attached to the channel of a MHD generator. Gas enters the oven and a liquid metal enters the mixer. The gas/liquid metal mixture is heated by the collected solar energy and moves through the MHD generator thereby generating electrical power. The mixture is then separated and recycled.

Solar driven liquid metal MHD power generator

Measuring apparatus for determining changes in the volume of limbs or other body extremities by determining the cross-sectional area of such limbs may comprise a transmitter (10) including first and second transducers (11, 12) for positioning on the surface of the limb at a predetermined distance therebetween, and a receiver (20) including a receiver crystal (21) for positioning on the surface of the limb. The distance between the receiver crystal and the first and second transducers are represented by respective first and second chords (d.sub.1, d.sub.2) of the cross-section of the limb (C) and the predetermined distance between the first and second transducers is represented by a third chord (d.sub.3) of the limb cross-section (C). The measuring apparatus may also include a Pinger (10) and associated electrical circuitry for generating acoustic pulses at the first and second transducers (11, 12) for propagation along the first and second chords (d.sub.1, d.sub.2) to derive at the receiver (20) first and second signals related to the travel time of the acoustic pulses along these chords. A computer (30) is connected to the receiver (20) for computing the area of the limb cross-section (C) utilizing these first and second signals.

Apparatus for determining changes in limb volume

An improved system is described for cooling high power waveguides by the use of cooling ducts extending along the waveguide, which minimizes hot spots at the flanges where waveguide sections are connected together. The cooling duct (24) extends along substantially the full length of the waveguide section, and each flange (18, 20) at the end of the section has a through hole (36) with an inner end connected to the duct and an opposite end that can be aligned with a flange hole in another waveguide section. Each flange (20) is formed with a drainage groove (60) in its face, between the through hole (36) and the waveguide conduit (16) to prevent leakage of cooling fluid into the waveguide. The ducts have narrowed sections (32, 34) immediately adjacent to the flanges to provide room for the installation of fasteners closely around the waveguide channel.

Waveguide cooling system

An apparatus is described for moving a probe (12) that engages moving living tissue such as a heart or an artery that is penetrated by the probe, which moves the probe in synchronism with the tissue to maintain the probe at a constant location with respect to the tissue. The apparatus includes a servo positioner (18) which moves a servo member (20) to maintain a constant distance from a sensed object (30) while applying very little force to the sensed object, and a follower (26) having a stirrup (28) at one end resting on a surface of the living tissue and another end carrying a sensed object (30) adjacent to the servo member. A probe holder (34) has one end mounted on the servo member (20) and another end which holds the probe (12). The probe is held adjacent to the stirrup (28) of the follower assembly, so that movements of the tissue and therefore of the follower assembly (26) result in corresponding movement of the probe (12) to follow the surface of the tissue.

System and method for moving a probe to follow movements of tissue

A mobile sampler 10 for use in acquiring samples of terrestial atmospheric gasses from a free body of such gasses. The device is chracterized by a plurality of tubular bodies 12 adapted to be mounted in side-by-side relation on a motorized highway vehicle V in mutual parallelism with the axis of the normal path of travel for the vehicle; each of the bodies is of a cylindrical configuration and has an axial opening disposed at each of its opposite ends whereby a linear flow path is defined therethrough, a pair of pivotally supported, spring-biased sealing caps 14A and 14B mounted adjacent the ends of the body and continuously urged into hermetic sealing relationship therewith, a restraint for securing the caps against spring-urged pivotal displacement, including a separable, normally tensioned line 52 interconnecting the caps and an operable release mechanism for simultaneously releasing the caps for spring-urged displacement, including a hot wire cutter 54 for separating said line, whereby samples of air are trapped in the body as the caps are spring-driven to assume an hermetically sealed relation with the openings defined in each of the opposite ends of the body.

Mobile sampler for use in acquiring samples of terrestial atmospheric

Apparatus for compressive testing of a test specimen may comprise vertically spaced upper and lower platen members (1 and 2) between which a test specimen (T) may be placed. The platen members are supported by a fixed support assembly (3, 5, and 6). A load indicator (14) is interposed between the upper platen member (1) and the support assembly (6) for supporting the total weight of the upper platen member (1) and any additional weight which may be placed thereon. Operating elements (8 and 17) are provided for moving the lower platen member (2) upwardly toward the upper platen member (1) whereby an increasing portion of the total weight is transferred from the load indicator (14) to the test specimen (T). The testing apparatus may include limit devices (20 and 22) for limiting the movement of the lower platen member (2) toward the upper platen member (1) to prevent permanent deformation in the test specimen (T). In one embodiment, the limit devices include a plurality of rods (20) attached to one of the platen members (2) and a vertically adjustable extension member (22) engageable with the other platen member (1).

Compression test apparatus

A symmetrical adsorption pump/compressor system having a pair of mirror image legs and a Joule Thomson expander 40, or valve, interposed between the legs thereof for providing a new, efficient refrigeration cycle. The system further includes a plurality of gas operational heat switches 48a, 48b, 48c, and 48d adapted selectively to transfer thereto heat from a thermal load 44 and to transfer or discharge heat therefrom through a heat projector 46, such as a radiator or the like. The heat switches comprise gas pressurizable chambers adapted for alternate pressurization in response to adsorption and desorption of a pressurizing gas confined therein.

Cycling Joule Thomson refrigerator

Stimulation the in vitro propagation of Guayule from a nutrient medium containing Guayule tissue by adding a substituted trialkyl amine bioinducing agent to the nutrient medium. Selective or differentiated propagation of shoots or callus is obtained by varing the amounts of substituted trialkyl amine present in the nutrient medium. The luxuriant growth provided may be processed for its poly isoprene content or may be transferred to a rooting medium for production of whole plants as identical clones of the original tissue. Provides method for producing large numbers of Guayule plants having identical desirable properties such as high polyisoprene levels.

Enhancement of in vitro Guayule propagation

The object of the invention is to provide an optical system for rotating the plane defined by a pair of parallel light beams. In one embodiment (see FIG. 4) a single pair of rhomboid prisms 36 and 37 have their respective input faces 15 disposed to receive the respective input beams 21 and 22. Each prism is rotated about an axis of revolution coaxial with each of the respective input beams 21 and 22 by means of a suitable motor 29 and gear arrangement 41 to cause the plane of the parallel output beams 21' and 22' to be rotated relative to the plane of the input beams. In a second embodiment, two pairs (FIG. 2) of rhomboid prisms 23, 24 and 31, 32 are provided. In a first angular orientation of the output beams, prisms 23 and 24 serve to merely decrease the lateral displacement of the output beams for keeping the beams in the same plane as the input beams. In a second angular orientation of the prisms (FIG. 3) the input faces of the second pair of prisms 31 and 32 are brought into coincidence with the input beams for rotating the plane of the output beams 21' and 22' by a substantial angle such as 90.degree..

Rhomboid prism pair for rotating the plane of parallel light beams

Control signals for phase-delay rectifiers, which require a variable firing angle that ranges from 0.degree. to 180.degree., are derived from line-to-line 3-phase signals (.phi.A, .phi.B, .phi.C) and both positive and negative firing angle control signals (+.alpha. and -.alpha.) which are generated by comparing (at 20) current command and actual current (sensed at 16). Line-to-line phases are transformed (32) into line-to-neutral phases and integrated (at 34) to produce 90.degree. phase delayed signals (A.phi., B.phi., and C.phi.) that are inverted (at 26a, b, c) to produce three cosine signals (C, A and B RAMP) such that for each its maximum occurs at the intersection of positive half cycles of the other two phases which are inputs to other inverters. At the same time, both positive and negative (inverted) phase sync signals are generated for each phase by comparing (at 27a, b, c) each with the next and producing a squarewave when it is greater. Ramp, sync and firing angle control signals are then used in combinational logic (FIG. 5) to generate the gate firing control signals for SCR gate drives (30) which fire SCR devices in a bridge circuit (24).

Combinational logic for generating gate drive signals for phase control

An improved method for markedly increasing the bond strength between a rigid, porous refractory material and a non-rigid substrate by densifying the face of the rigid material opposing the substrate. Densification is accomplished by wetting the refractory material and then impregnating it with a composite slurry having a particle size to fill voids of the porous material.

Attachment system for silica tiles

A control system for a solid state crossbar switch (10) which allows a plurality of switch control and interrogation functions to be implemented by time sharing related circuitry. The crossbar switch (10) includes a plurality of X ports (X.sub.1 -X.sub.N) and Y ports (Y.sub.1 -Y.sub.M), each X-Y port intersection designating a specific X-Y intersection latch which controls a plurality of associated switches for interconnecting one set of data lines associated with the X port to another set of data lines associated with the Y port. The control system disclosed continuously and sequentially addresses each of the X-Y intersection latches at a 10 megahertz rate. During this continual and sequential addressing, the control circuitry disclosed includes a capability for interrogating each intersection latch for determining which are in a set condition, ensuring that only one X-Y intersection latch is set on an X row and Y column defining that latch, resetting all of the X-Y intersection latches, and determining which of the X-Y intersection latches are in a set condition.

Control means for a solid state crossbar switch

A solid electrolyte cell including a body of solid ionized gas-conductive electrolyte 20 having mutually spaced surfaces 30 and 32 on which is deposited a multiplicity of mutually spaced electrodes 34 and 36, having strips 30 and 32 of bare substances interposed between electrodes, so that currents of ionic gas may be established between the electrodes via the bare strips 30 and 32, whereby electrical resistance for the cells is lowered and the gas conductivity thereof is enhanced.

Solid electrolyte cell

A process for the purification of molten materials during crystal growth by electromigration of impurities to localized dirty zones. The process has particular applications for silicon crystal growth according to Czochralski techniques and edge-defined film-fed growth (EFG) conditions. In the Czochralski crystal growing process, the impurities are electromigrated away from the crystallization interface by applying a direct electrical current to the molten silicon for electromigrating the charged impurities away from the crystal growth interface. In the EFG crystal growth process, a direct electrical current is applied between the two faces which are used in forming the molten silicon into a ribbon. The impurities are thereby migrated to one side only of the crystal ribbon. The impurities may be removed or left in place. If left in place, they will not adversely affect the ribbon when used in solar collectors. The migration of the impurity to one side only of the silicon ribbon is especially suitable for use with asymmetric dies which preferentially crystallize uncharged impurities along one side or face of the ribbon.

Electromigration process for the purification of molten silicon during

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Alan M Lovelace