sonic gas pressure gauge

2
while the spindle is rotatingand ultrasonically reciprocating. Slurry flows through the spindle and through the hollowdrill bit to cleanse the cutting edge of the bit duringa drilling operation.mJVB 4,831,884 43.35.Zc DEVICE FOR DETERMINING THE FLOW VELOCITY OF A MEDIUM IN A CYLINDRICAL CONDUIT Jan G. Drenthen, assignorto Servex B.V. 23 May 1989 (Class73/861.27); filed in The Netherlands 27 October 1986 An improvement to the accuracy of ultrasonic flow velocity measure- mentisdescribed wherein two pairs of ultrasonic transducers areemployed, each pair being oriented at different angles in a conduit, to provide correc- tion for "swirls" that occur in pipe flow, particularlyin the vicinity of bends.--JVB 2,6 11 19 i• ' •.•1,7 15 '1..•=•!•• 180 14 14 14 14 the standing wave in the longitudinal bar. The bar is clamped to a massive tool holderat a nodalline defined by the clamping holes 24. The tool piece 25 is fastened to the bar by means of a threaded post 26 whose lengthis a half-wavelength at the driven frequency. The postmay thereby be large enough to securely fasten thetool bit 25 to thebar,yetnotimpede itsmotion by participating freely inthe resonant oscillation. The tangential oscillation of the tool bit 25 with respect to rotating workpiece 16 is saidto reduce cutting friction and provide improved accuracy in themachining process.-- JVB 4,836,858 45.35.Zc ULTRASONIC ASSISTED PAINT REMOVAL METHOD Theodore J. Reinhart, assignorto the United States of America 6 June 1989 (Class 134/1); filed 7 July 1987 A paint or otherprotective coating removal method involves the use of ultrasonic energy applied to the coating in the presence of surface prepara- tion agents. The process is discussed in connection with the removal of old 418 414'"---,.•- • 400 404• 40641Z• identification markings from aircraftin preparation for their replacement. The method is said to be environmentally and human-operator safe in com- parison with abrasive blasting andchemical solvent removal. See also U.S. Patent 4,858,264, issued 22 August 1989.--JVB 4,856,391 43.35.Zc ULTRASONIC OSCILLATION MACHINING APPARATUS Shoji Mishiro, assignor to Taga Electric Company 15 August1989 (Class82/137); filed in Japan 13 May 1987 An improvement issaid to beachieved in ultrasonic machining appara- tus by theuse of a widelongitudinal barvibrator 10,driven by a multiplicity of ultrasonic heads 18,configured to place thetoolbit 25 at a velocity loop of 4,859,378 45.35.Zc METHOD OF ULTRASONICALLY ASSEMBLING WORKPIECES Jeffrey S. Wolcott, assignor to Branson Ultrasonics Corporation 22 August1989 (Class264/23); filed 28 October 1988 Assembling of two workpieces by the ultrasonic staking or riveting method comprises the providing of a firstthermoplastic workpiece having an upstanding stud, an apertured second workpiece juxtaposed onthefirst workpiece so thatthestud protrudes through theaperture ofthefirst work- piece, anda hornapplying ultrasonic energy to the upstanding, free end of thestud by forced contact between thestud endandthehorn. The improve- ment comprises theapplication of ultrasonic energy to the horn during brief timeperiods, which alternate withbrief timeperiods during which thehorn, while still in contact with the studend,is substantially inactive. The plastic materialis caused to become softandis deformed during the time period in which theultrasonic energy isapplied, but,during theperiod when thehorn is inactive, the horn acts asa heatsink,causing the plastic material to cool and to solidify.In this manner,the deformation of the studis saidto be achieved incrementally or in discrete steps, providinga better and more precisely controlled assembly exhibiting a more pleasing andneatappear- ance.--JVB 4,869,097 45.35.Zc SONIC GAS PRESSURE GAUGE Bernhard R. Tittmann et al., assignors to Rockwell International Corporation 26 September 1989 (Class 73/52); filed 23 March 1988 This patent describes a method and an apparatus for measuring the pressure ofa gas within a sealed vessel. A sonic transducer applies anoscil- lating force to thesurface ofthevessel. The frequency oftheultrasonic wave is swept through a range that causes resonant vibration of the gas in the vessel. A receiving transducer measures the amplitude of the resultant vi- brationat the vessel surface and reveals the resonance frequency of the gas aspeaks in the amplitude of the sweep. The resonance frequency obtained depends upon thecomposition of thegas, itspressure and temperature, and theshape of theconfining vessel. These relationships can bepredetermined empirically so thatthepressure inside thevessel can be calculated when the composition ofthe gas, its temperature, and shape ofthe confining vessel are known. The outputof the receiver canbe supplied to a computer that is programmed to calculate the pressure, based uponthese predetermined 2268 J. Acoust. Soc. Am. 87(5), May 1990; 0001-4966/90/052268-02500.80; @ 1990 Acoust. Soc. Am.;PatentReviews 2268 Redistribution subject to ASA license or copyright; see http://acousticalsociety.org/content/terms. Download to IP: 193.0.65.67 On: Wed, 26 Nov 2014 14:12:33

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Page 1: Sonic gas pressure gauge

while the spindle is rotating and ultrasonically reciprocating. Slurry flows through the spindle and through the hollow drill bit to cleanse the cutting edge of the bit during a drilling operation.mJVB

4,831,884

43.35.Zc DEVICE FOR DETERMINING THE FLOW VELOCITY OF A MEDIUM IN A CYLINDRICAL

CONDUIT

Jan G. Drenthen, assignor to Servex B.V. 23 May 1989 (Class 73/861.27); filed in The Netherlands 27 October

1986

An improvement to the accuracy of ultrasonic flow velocity measure- ment is described wherein two pairs of ultrasonic transducers are employed, each pair being oriented at different angles in a conduit, to provide correc- tion for "swirls" that occur in pipe flow, particularly in the vicinity of bends.--JVB

2,6 11 19

i• ' • .•1,7 15 '1..•=•!•• 180

14 14 14 14

the standing wave in the longitudinal bar. The bar is clamped to a massive tool holder at a nodal line defined by the clamping holes 24. The tool piece 25 is fastened to the bar by means of a threaded post 26 whose length is a half-wavelength at the driven frequency. The post may thereby be large enough to securely fasten the tool bit 25 to the bar, yet not impede its motion by participating freely in the resonant oscillation. The tangential oscillation of the tool bit 25 with respect to rotating workpiece 16 is said to reduce cutting friction and provide improved accuracy in the machining process.-- JVB

4,836,858

45.35.Zc ULTRASONIC ASSISTED PAINT REMOVAL

METHOD

Theodore J. Reinhart, assignor to the United States of America 6 June 1989 (Class 134/1); filed 7 July 1987

A paint or other protective coating removal method involves the use of ultrasonic energy applied to the coating in the presence of surface prepara- tion agents. The process is discussed in connection with the removal of old

418

414'"---,.•- • 400 404•

40641Z•

identification markings from aircraft in preparation for their replacement. The method is said to be environmentally and human-operator safe in com- parison with abrasive blasting and chemical solvent removal. See also U.S. Patent 4,858,264, issued 22 August 1989.--JVB

4,856,391

43.35.Zc ULTRASONIC OSCILLATION MACHINING APPARATUS

Shoji Mishiro, assignor to Taga Electric Company 15 August 1989 (Class 82/137); filed in Japan 13 May 1987

An improvement is said to be achieved in ultrasonic machining appara- tus by the use of a wide longitudinal bar vibrator 10, driven by a multiplicity of ultrasonic heads 18, configured to place the tool bit 25 at a velocity loop of

4,859,378

45.35.Zc METHOD OF ULTRASONICALLY ASSEMBLING WORKPIECES

Jeffrey S. Wolcott, assignor to Branson Ultrasonics Corporation 22 August 1989 (Class 264/23); filed 28 October 1988

Assembling of two workpieces by the ultrasonic staking or riveting method comprises the providing of a first thermoplastic workpiece having an upstanding stud, an apertured second workpiece juxtaposed on the first workpiece so that the stud protrudes through the aperture of the first work- piece, and a horn applying ultrasonic energy to the upstanding, free end of the stud by forced contact between the stud end and the horn. The improve- ment comprises the application of ultrasonic energy to the horn during brief time periods, which alternate with brief time periods during which the horn, while still in contact with the stud end, is substantially inactive. The plastic material is caused to become soft and is deformed during the time period in which the ultrasonic energy is applied, but, during the period when the horn is inactive, the horn acts as a heat sink, causing the plastic material to cool and to solidify. In this manner, the deformation of the stud is said to be achieved incrementally or in discrete steps, providing a better and more precisely controlled assembly exhibiting a more pleasing and neat appear- ance.--JVB

4,869,097

45.35.Zc SONIC GAS PRESSURE GAUGE

Bernhard R. Tittmann et al., assignors to Rockwell International Corporation

26 September 1989 (Class 73/52); filed 23 March 1988

This patent describes a method and an apparatus for measuring the pressure of a gas within a sealed vessel. A sonic transducer applies an oscil- lating force to the surface of the vessel. The frequency of the ultrasonic wave is swept through a range that causes resonant vibration of the gas in the vessel. A receiving transducer measures the amplitude of the resultant vi- bration at the vessel surface and reveals the resonance frequency of the gas as peaks in the amplitude of the sweep. The resonance frequency obtained depends upon the composition of the gas, its pressure and temperature, and the shape of the confining vessel. These relationships can be predetermined empirically so that the pressure inside the vessel can be calculated when the composition of the gas, its temperature, and shape of the confining vessel are known. The output of the receiver can be supplied to a computer that is programmed to calculate the pressure, based upon these predetermined

2268 J. Acoust. Soc. Am. 87(5), May 1990; 0001-4966/90/052268-02500.80; @ 1990 Acoust. Soc. Am.; Patent Reviews 2268

Redistribution subject to ASA license or copyright; see http://acousticalsociety.org/content/terms. Download to IP: 193.0.65.67 On: Wed, 26 Nov 2014 14:12:33

Page 2: Sonic gas pressure gauge

FUNCTION GENERATOR

[co . I

relationships that are stored in the computer. It appears that the success of this approach depends upon using the lowest-order gas mode, which must also be well separated from any structural resonances of the container. The lowest-order mode possible corresponds to a transverse motion of gas with- in the bottle.--JVB

ter-cooled reactor wall, subject to aggressive corrosion attack. An ultra- sonic probe, inserted into the refractory lining, is calibrated to provide a temperature-corrected measure of its own length. The probe is intended to corrode at approximately the same rate as the wall of the reactor.--JVB

4,850,450

43.40. Ph LOGGING TOOL HOUSING WITH ACOUSTIC DELAY

David C. Hoyle, Shu-Kong Chang, and Gyula Varga, assignors to Schlumberger Technology Corporation

25 July 1989 {Class 181/102); filed 19 November 1987

The logging tool housing described has a plurality of interruptions or holes in its wall, intended to delay the acoustic energy passing from a trans- mitter to the receiver in the housing. In addition to the acoustic delay, the housing is said to reduce some acoustic noise and ringing.•SAC

4,862,748

45.35.Zc MULTIPLE ULTRASONIC TRANSDUCER WITH REMOTE SELECTOR

Wayne E. Woodmansee, assignor to The Boeing Company 5 September 1989 (Class 73/641); filed 20 July 1988

This patent provides for a rotatable reflector that can selectively redi- rect energy from any one of a number of transducers toward the inspection surface. Such transducers may individually be optimized for thickness mea-

///•//i/• , //////////////////////

surement, flaw detection, or for different damping, frequency, or focal length properties. The apparatus is said to be particularly useful for multi- channel testing and for rapid inspection of large pieces.•JVB

4,850,451

43.40. Ph DEVICE FOR GENERATING BOTH

TRANSVERSE AND LONGITUDINAL ACOUSTIC WAVES IN A PLURALITY OF DIFFERENT DIRECTIONS

Jacques Cholet and Pierre-Claude Layotte, assignors to Institute Francais du Petrole

25 July 1989 {Class 181/114}; filed in France 23 December 1986

A vehicular-mounted device for generating longitudinal and trans-

verse acoustic waves is described. A mass at the end of a pivoted arm falls downwardly to strike a slanted target in the ground.•SAC

4,872,345 AG qG ?•, I•ICAOI IDIId/• _ tAIAI I CD/'tql/'tkl

Lynton W. R. Dicks, assignor to Shell Oil Company 10 October 1989 (Class 73/597); filed 30 March 1988

A method and apparatus are described for measuring the decreasing thickness of the refractory lining of a high-pressure, high-temperature, wa-

4,852,067

,=•,,e,v SONIC LOGGING

James E. White, assignor to Schlumberger Well Services 25 July 1989 {Class 367/31); filed 31 May 1983

Continuous tube waves of 20 to 200 Hz are established in a borehole

containing spaced apart transducers such as a first and third geophone and a

2269 J. Acoust. Soc. Am. 87(5), May 1990; 0001-4966/90/052269-02500.80; ¸ 1990 Acoust. Soc. Am.; Patent Reviews 2269

Redistribution subject to ASA license or copyright; see http://acousticalsociety.org/content/terms. Download to IP: 193.0.65.67 On: Wed, 26 Nov 2014 14:12:33