US2635462A - Densimeter - Google Patents

Densimeter Download PDF

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Publication number
US2635462A
US2635462A US771578A US77157847A US2635462A US 2635462 A US2635462 A US 2635462A US 771578 A US771578 A US 771578A US 77157847 A US77157847 A US 77157847A US 2635462 A US2635462 A US 2635462A
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fluid
frequency
output
density
phase
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US771578A
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Foster M Poole
Le Roy C Paslay
John F Gaumer
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Priority to DENDAT268353D priority Critical patent/DE268353C/de
Priority to FR461932A priority patent/FR461932A/fr
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/002—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/002—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis
    • G01N2009/006—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis vibrating tube, tuning fork

Definitions

  • This invention relates to a densimeter and more particularly to a densimeter for measuring the densities of iluids.
  • a densimeter for accurately and continuously indicating the densities of iiuids, both liquid and gaseous; the provision of a density meter which at all values of fluid densities will automatically compensate for temperature-induced density variations in a iluid being tested; the provision of a densimeter of this class which is adaptable to density indicating and control purposes; and, the provision of a densimeter of the class described which is dependable in operation and of reliable construction.
  • the invention accordingly comprises the elements and combinations of elements, steps and sequence of steps, features of construction and manipulation, and arrangements of parts which will be exemplied in the structures and methods hereinafter described, and the scope of the application of which will be indicated in the following claims.
  • Fig. 1 is a side elevation of a vibratory element of the present invention with its casing shown in section;
  • Fig. 2 is a vertical section taken on line 2-2 of Fig. l, the top portion of the casing being broken away,
  • Fig. 3 is a horizontal section taken on llne 3-3 of Fig. 2;
  • Fig. 4 is a circuit diagram.
  • the present invention utilizes the principle that the natural resonant frequency of any Vibratory element or system may be varied by a change in its mass.
  • the variation in frequency of a vibratory element or system is used to indicate density variations of fluids which are internally contained in such a vibratory element or system.
  • This vibratory element l includes two hollow tines 3 and 5 which are rmly aixed vby brazing or a like method in a iixed base block 24. These tines have their walls thinned out at 28 so as to favor vibratory movements.
  • the tine 3 is provided with a. bottom 6 which by means of a connector I and adaptor 9 is connected to an inlet conduit Il.
  • An adaptor I3 and an inlet fitting l5 are utilized to extend the passage of conduit il through a cup-shaped supporting base l1.
  • Tine 5 is similarly provided with a bottom cap I8, a connector I9, an adaptor 2l, a conduit 23, an adaptor 25 and an outlet iitting 2'1.
  • Tines 3 and 5 are supported by and extend through the block 24 which by means of a bracket 29 and bolts 3
  • Block 24 is provided with an internal passage to permit communication between the interior of tine 3 and the interior of tine 5. Suitable drain plugs 33 and 5I permit access for cleaning purposes.
  • Tine 3 contains a tube 35 having perforations 31 at its upper end and having a machined disc 39 rigidly aflixed and sealed to its upper end.
  • the lower end of tubing 35 is snugly but removably iitted into the bottom cap '5, to provide easy removal for cleaning purposes.
  • the upper and lower surfaces of the disc 39 are sealed against the top edge of tine 3 by means of threaded cap 4l.
  • Tine 5 is similarly provided with a tube 43 having perforations 45 and a disc 41 at its upper end.
  • Aremovable cap 49 is similarly provided for tine 5.
  • Caps 4l and 49 have afxed to their upper surfaces bolts 53. These bolts together with adjustment nuts are utilized exactly to match the vibratory characteristics of tines 3 and 5.
  • An electromagnetic vibrating driver 51 is mounted on a bracket 5S and is positioned so as to act upon two magnetic shoes 59 which are mounted respectively upon tines 3 and 5.
  • and B3 are respectively supported by bracket 58 in juxtaposition to tines 3 and 5, respectively.
  • the electrical output from the microphones Si and 63 is conducted by means of wires 65 carried by a cable 61 which passes through the cup-shaped base IT.
  • the electrical input to the electromagnetic driver 5'! is carried by wires E9 of said cable 61.
  • the entire assembly of the vibratory element l and its corresponding -components are sealed by means of a casing 1I.
  • the cup-shaped base Il may be mounted conveniently by means of a bracket T2.
  • a pipe line adapted to conduct fluid is shown at reference numeral 13.
  • a pipe l5 interconnects pipe line 13 with a pump 11, a constant temperature auxiliary heater T9, which may be omitted if desired, and tine 3 of vibratory element I.
  • connects the tine 5 to a temperature compensating unit 83.
  • An outlet pipe 85 provides for iiuid communication between the temperature compensator unit 83 and the pipe line 13.
  • and 53 which are preferably of the pick-up coil type, are connected through a wire t1, a wire 89 and a condenser Sl to the input of a vibrator electronic drive unit I.
  • supply the grid circuit of a vacuum tube ill.
  • the circuit components of the tube lt include a cathode resistor l, a screen resistor
  • the output of the tube itt is transmitted through a coupling condenser
  • 69 includes a grid resistor a cathode resistor H3, a decoupling condenser l
  • One output of tube It@ proceeds to the electromagnetic driver t? through wires llB and l2l.
  • 69 is through a wire
  • 33 is provided between the diode
  • 39 is transmitted through a coupling condenser E35 to three amplier tubes
  • 31 include a resistor
  • 35 include a potentiometer U5, a cathode resistor
  • the circuit components of tube lill include a resistor
  • the three-phase output of the transformer lfl is connected through wires A to the stator of a three-phase selsyn motor,
  • 61 is connected through gears lil and
  • 11 is adapted to drive a set of three variable resistors C-l, C ⁇ 2 and C-S in the temperature compensator unit 83 in an opposite direction to three similarly driven variable resistors D-i, D-2, and D-3.
  • Variable resistors C-i, C-2, and C-3 are wound with negative resistance coefficient type wire while the inversely driven variable resistors D-l, D-2 and D-S are wound with Zero resistance coefcient type wire.
  • negative resistance coefficient type wire is meant wire which has its resistance decreased by an increase in temperature (or increased by a decrease in temperature).
  • zero resistance coeicient type wire Wire which has its resistance substantially unaffected by temperature.
  • a set of three resistors E-l, E-Z and lil-3 are connected in series with C-l and IJ-l, C-Z and D-Z, and 0 3 and D-, respectively. These six variable resistors and the three resistors are all enclosed in the temperature compensator unit 83 having a well containing resistors E-l, E-2 and E ⁇ 3 immersed in the fluid.
  • 33 in combination with the six variable resistors and three resistors of the .temperature compensator unit S3 complete the input network circuit for a phase shift oscillator unit I I through wires
  • phase shift oscillator unit indicated at numeral II has components equivalent to the corresponding components of the driver unit I described above. Therefore, in the interest of brevity, the components of the phase shift oscillator unit II carry reference numerals corresponding as to the last two digits of the numerals of the respective equivalent components ofmvibratory driver unit I; the reference numerals of unit I, however, are prefaced by l and the reference numerals of unit II being prefaced by 2.
  • the operation, construction and circuits of unit I are respectively identical with those of unit II with the single exception that there is no output taken from the plate of tube 2&9 as is taken from the plate of tube H39; the oscillatory circuit in unit II being completed by a wire
  • a plate resistor 2 I8 is added to supply a load to the tube 289 which resistor is equivalent to the electromagnetic driver 51 which is the load of tube
  • the three-phase output of the phase shift oscillator unit II is connected to the rotor of the three-phase selsyn motor
  • Operation is as folllovvs: A iiuid, the density which is to be determine is initially caused to flow through pipe line 13. A portion of this fluid is oy-passed through the pipe l5 and through the vibratory element or system l. A relatively constant flow of this fluid is insured by the use of the pump 11. The .duid may be maintained at a relatively constant temperature, if desired, by the use of the constant temperature unit 19. Referring to Figs. 1-3, the fluid is conducted through the conduit l
  • any casual noise or Vibration will cause microphones tl and 53 to produce an electrical signal which will be transmitted through wires 8l and 89 and condenser 9
  • This signal is amplified by the tu'be lill! and fed through the coupling condenser
  • energizes the electromagnetic driver 51 which in turn will actuate the tines 3 and 5 of the vibratory element l.
  • 25 In order to maintain the level of the signal through the oscillatory circuit at a relatively constant level the tube
  • the peak voltage of the oscillatory signal as measured at the plate of tube
  • 00 which may be of the variable mu type, thus has its gain effectively controlled by the action of tube
  • 09 is maintained substantially constant to deliver a relatively constant amplitude signal through the coupling condenser
  • is such that the outputs of these three tubes as characterized by the signals in transformer windings
  • 31 lags the output signal on the plate of tube
  • leads that of the signal on plate of tube
  • 49 provides a means for adjusting the amplitude of the signal of tube
  • 41 is fed to the stator of the selsyn motor
  • phase and the frequency of the output of the phase shift oscillator circuit II is dependent upon the relative settings of the variable resistors C-l, C-2, C3, D-I, D-2 and D-3.
  • variable resistors C-l, C-2, C3, D-I, D-2 and D-3 are varied and cause a corresponding frequency and phase change in the input signal through wires
  • This signal is amplified by means of the tubes 200 and 209 together with their associated circuit components and -by means of the lead
  • the amplitude level of this oscillatory signal is maintained substantially constant by the action of A. V. C. tube 225, and the three vacuum tubes 231, 239 and 24
  • the output of the threephase transformer 241 is connected to the rotor of the three phase selsyn motor
  • 01 is therefore dependent upon any frequency and phase differences between the outputs of the vibratory driver unit I and that of the phase shifter oscillator unit II.
  • any variation in the resonant frequency of the vibratory element causes a corresponding variation in the output frequency of the driver unit I.
  • This variation in the output of driver unit I will cause a corresponding deflection of the indicating device
  • 41 will be in phase respectively to the corresponding windings of transformer 241 and the frequency output to the rotor and the stator of the selsyn motor
  • Variable resistors C-I, C-2 and C-3 are of negative coefficient wire and when the fluid temperature increases the resistance of these resistors will decrease causing a corresponding increase in frequency in the input signal to tube 200.
  • variable resistors C-I, C-2 and C-3 are so attached to shaft
  • the temperature-induced decrease in density of the uid causes the vibratory frequency of element to increase which causes a decrease in the effective resistance of variable resistors D-l, D-2 and D-3, which resistance decrease is relatively greater per degree of rotation of shaft
  • the net effect of the temperature compensator unit 83 is to insure that there will be no change in the absolute density reading as indicated by indicating device
  • the tem' perature compensator unit 83 is a network of variable and fixed resistances some of which are of negative coefficient wire. By proper connection of this network an effective non-linear or linear temperature compensation can be obtained. For example, where density is read on an A. P. I. scale, non-linear temperature compensation is desirable.
  • the vibratory element or system is filled with uid of a known density at a temperature, and by proper manipulation of the adjustment nuts 55 of tines 3 and 5, the indicating device
  • 15 may be transmitted to any remote point by known transmitter means. It is also clear that any indication in element
  • the present invention is useful not only for indicating density conditions, but provides means for initiating corrections of deviations from desired density conditions.
  • An exemplary use would be in the petroleum industry where it is often desired to maintain a fuel oil output at a predetermined specific gravity (density). And whatever vresults are attained are independent of temperature fluctuations, which is of great importance in any application of the invention to practical ends such as outlined.
  • a further example of such control in the petroleum industry is the shutting off of a valve in a pipeline where oil of one density is followed by oil of another density and it is desired to switch the oils into separate tanks.
  • a densimeter for measuring the density of fluids comprising a hollow vibra-tory mcchanical system, circulating means for moving fluid through said system, said system including the contained fluid having a natural frequency of vibration, an electric driver for mechanically vibrating as a unit said systemvincluding the contained iiuid at said natural frequency, electric tra pick-up 'means responsive to the vibrations of the system including the iiuid, an -electronic circuit responsive to said pick-up means and adapted to Vproduce electrical oscillations in accordance with the mechanical vibrations and to energize said driver, said electronic circuit having a first output, a second electronic circuit having a second output, means responsive to incipient frequency and phase differences between said Vfirst and second outputs to maintain the frequency and phase of said second output substantially the same as that of said first output, and indicating means actuated by said lastmentioned means to move in accordance with frequency variations of said iirst output and thus continuously to indicate the density of said con tained ii
  • a densimeter for measuring the density of fluids comprising a hollow vibratory mechanical system, circulating means for moving fluid through said system, said system including the contained fiuid having a natural frequency of vibration, an electric driver for mechanically vibrating as a unit said system including the contained fluid at said natural frequency, electric pick-up means responsive to the vibrations of the system including the fluid, an electronic circuit responsive to said pick-up means and adapted to produce electrical oscillations in accordance with the mechanical vibrations and to energize said driver, said electronic circuit having a first output, a second electronic circuit having a second output, means in said second circuit responsive to the temperature of the fluid adapted to vary the frequency and phase of said second output to compensate for temperatureinduced density variations of said iiuid, and means adapted to indicate said natural vibratory frequency responsive to incipient frequency and phase differences between said first and second outputs to maintain the frequency and phase of said second output substantially the same as that of said first output.
  • a densimeter for measuring the density of fluids comprising a hollow vibratory mechanical system, circulating means for moving fluid through said system, said system including the contained fluid having a natural frequency of vibration, an electric driver for mechanically vibrating as a unit said system including the contained iiuid at said natural frequency, electric pick-up means responsive to the vibrations of the system including the iiuid, an electronic circuit responsive to said pick-up meansand adapted to produce electrical oscillations in accordance with the mechanical vibrations and to energize said driver, said electronic circuit having a first output, a second electronic circuit having a second oscillatory output, means in each of said electronic circuits for maintaining substantially constant the amplitude of the respective outputs, and means adapted to indicate said natural vibratory frequency responsive to incipient frequency and phase differences between said first and second outputs to maintain the frequency and phase of said second output Vsubstantially the same as that of said first output.
  • a densimeter for measuring the density of iiuids comprising a hollow vibratory mechanical system, circulating means for moving fluid through said system, said system including the contained fluid having a natural frequency of vibration, an electric driver for mechanically vibrating as a unit said system including the contained fluid at said natural frequency, electric pick-up means responsive to the vibrations of the system including the fluid, an electronic circuit responsive to said pick-up means and adapted to produce electrical oscillations in accordance with the mechanical vibrations and to energize said driver, said electronic circuit having a first output, a second electronic circuit having a second output, means in said second circuit responsive to the temperature of the fluid adapted to vary the frequency and phase of said second output to compensate for temperature-induced density variations of said fluid, means in each of said electronic circuit for maintaining substantially constant the amplitude of the respective outputs, and means adapted to indicate said natural vibratory frequency responsive to incipient frequency and phase differences between said first and second outputs to maintain the frequency and phase of said second outputs substantially the same as that of said first output.
  • a densimeter for measuring the density ofl fluids comprising a hollow vibratory mechanical system, circulating means for moving fluid through said system, said system including the contained fluid having a natural frequency of vibration, an electric driver for mechanically vibrating as a, unit said system including the contained fluid at said natural frequency, electric pick-up means responsive to the vibrations of the system including the fluid, an electronic circuit responsive to said pick-up means and adapted to produce electrical oscillations in accordance with the mechanical vibrations and to energize said driver, said electronic circuit having a first output, a second electronic circuit having a second output, means responsive to any incipient differences between the frequencies and phases of said two outputs adapted to move in accordance with said differences but to maintain an assumed position when said frequencies and phases are identical, whereby the density of said contained fluid is continuously indicated.
  • a densimeter for measuring the density of fluids comprising a hollow vibratory mechanical system, circulating means for moving fluid through said system, said system including the contained fluid having a natural frequency of vibration, an electric driver for mechanically vibrating as a unit said system including the contained fluid at said natural frequency, electric pick-up means responsive to the vibrations of the system including the fluid, an electronic circuit responsive to said pick-up means and adapted to produce electrical oscillations in accordance with the mechanical vibrations and to energize said driver, said electronic circuit having a first output, a second electronic circuit having a second output, and means fed by said first and second outputs adapted to move only when either the frequencies or phases of said outputs are unequal, the frequency and phase of the second circuit being responsive to the movement of said means, whereby the density of said contained fluid is indicated.
  • a densimeter for measuring the density of fluids comprising a hollow vibratory mechanical system, circulating means for moving fluid through said system, said system including the contained fluid having a. natural frequency of vibration, an electric driver for mechanically vibrating as a unit said system including the contained fluid at said natural frequency, electric 10 pick-up means responsive to the vibrations of the system including the fluid, an electronic circuit responsive to said pick-up means and adapted to produce electrical oscillations in accordance with the mechanical vibrations and to energize said driver, said electronic circuit having a rst output, a second electronic circuit having a second output, means in said second circuit responsive to the temperature of said fluid to compensate for temperature-induced density variations of said fluid, and means fed by said first and second outputs ⁇ adapted to move only when either the frequencies or phases of said outputs are unequal, the frequency and phase of the second circuit being responsive to the movement of said means, whereby the density of said contained fluid is indicated.
  • a densimeter for measuring the density of uids comprising a hollow vibratory mechanical system, circulating means for moving fluid through said system, said system including the contained fluid having a natural frequency of vibration, an electric driver for mechanically vibrating as .a unit said system including the contained fluid at said natural frequency, electric pick-up means responsive to the vibrations of the system including the fluid, an electronic circuit responsive to said pick-up means and adapted to produce electrical oscillations in accordance with the mechanical vibrations and to energize said driver, said electronic circuit having a first output, a second electronic circuit having a second output, means in said second circuit responsive to the temperature of said fluid to compensate for temperature-induced density variations of said fluid, electronic means in each of said circuits for maintaining substantially constant the amplitude of the respective outputs, and means fed by said first and second outputs adapted to move only when either the frequencies or phases of said outputs are unequal, the frequency and phase of the second circuit being responsive to the movement of said means, whereby the density of said contained fluid is'indicated.
  • Apparatus for responding to the density of fluids comprising a hollow vibratory system adapted to contain a fluid the density of which is to be determined, said system including a contained fluid and having with said fluid a natural vibratory frequency of resonance, 'an electric driver for mechanically vibrating as a unit said system including the contained fluid at said natural frequency, electric pick-up means responsive to the vibrations of the system including the fluid, a regenerative circuit connected between the pick-up means and the driver and feeding an output, and frequency responsive means connected with said output.
  • Apparatus for responding to the density of fluids comprising a hollow vibratory system adapted to contain a fluid the density of which is to be determined, said system including a contained fluid and having with said fluid a natural vibratory frequency of resonance, an electric driver for mechanically vibrating as a unit said system including the contained fluid at said natural frequency, electric pick-up means responsive to the vibrations of ther system including the fluid, a regenerative circuit connected between the pick-up means and the driver and feeding an output, means in said circuit for maintaining substantially constant the amplitude of the oscillations therein, and frequency responsive means connected with said output.
  • Apparatus for responding to the density of fluids comprising a hollow vibratory system adapted to contain a uid the density of which is to be determined, said system including a contained fluid and having with said uid a natural vibratory frequency of resonance, an electric driver for mechanically vibrating as a unit said system including the contained fluid iat said natura-l frequency, electric pick-up means responsive to the vibrations of the system including the fluid, a regenerative circuit connected between the pick-up means and the driver and feeding 'a first output, a phase-shift oscillator circuit having a second output, and means connecting said Voutputs responsive to phase and frequency-diiferences between the outputs to move in a direction to cancel said phase and frequency differences.
  • Apparatus for responding to the .density of uids comprising a hollow vibratory system adapted to contain a fluid the density of which is to be determined, said system including a contained fluid and. having with said fluid a natural vibratory frequency of resonance, an electric driver for Ymechanically vibrating as a unit said system including the contained iiuid at said natural frequency, electric pick-up means responsive to the vibrations Vof the system including the fluid, a regenerative circuit connected between the pick-up means and the driver and feeding ra first output, ⁇ a phase-shift oscillator circuit feeding a second output and having a temperature-'responsive circuit componentmeans Yconnecting said outputs responsive to phase and frequency differences between the outputs to move in ,a direction to cancel said phase and frequency differences, said temperature-responsive component and the fluid being in heat ei;- ⁇ change relationship.
  • Apparatus ifor responding to the density of viiuids comprising a hollow vibratory system adapted to contain a :duid the density of which is to be determined, said .system including a contained fluid .and having with said fluida natural vibratory frequency of resonance, an electric driver for mechanically vibrating as a unit said system including the contained fluid at .said natural frequency, electric pick-up means responsive to the vvilcuati'ons of the system including the fluid, a regenerative circuit connected between 'the vpick-up Ineans and the driver and feeding a first output, a phase-shift oscillator circuit feeding a second output and having .a temperature-responsive circuit component,means connecting said outputs responsive to ⁇ phase and frequency differences between the outputs to move in a direction to cancel said phase and frequency differences, said temperature-.responsive component and the fluid being 1in heat exchange relationship, and means in each of said 1.2 circuits for maintaining constant and equal the amplitudes ofthe oscillations therein.
  • Apparatus for 'responding to the density of fluids comprising a hollow vibratory vsystem adapted to contain .a .fluid the density of which is to be determined, said system including Aa contained fluid and having with said fluid a natural vibratory frequency of resonance, .circulating means for moving iiuid through said system, .an electric driver for mechanically vibrating as a unit said system including the contained :uid at saidnatural frequency, electric pick-up means responsive to the vibrations of the system includ- ⁇ ing the fluid, a regenerative circuit connected between the pick-up means .and the driver and feeding ran output, and frequency responsive means connected with said output.
  • Apparatus for responding to the ⁇ density of uids comprising a hollow vibratory system adapted to contain a fluid the density of -which iis to be determined, ysaid system including ⁇ a contained :duid and having with said fluid fa natural Vvibratory frequency of resonance, an electric ldriver for mechanically vibrating as a unit said system including the contained fluid at said natural frequency, electric pick-up means responsive to ⁇ the vibrations of the system 4including the fluid, a regenerative circuit connected between lthe pick-up means and the driver and feeding an output, means in said circuit rfor maintaining substantially constant the amplitude of vthe oscillations therein, frequency responsive means connected with said output, and means responsive 'to the temperature -of said fluid to Vary the yfrequency of said oscillations to compensate 'for ltemperature induced density variations ⁇ of said ijuid.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Volume Flow (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
US771578A 1947-09-02 1947-09-02 Densimeter Expired - Lifetime US2635462A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DENDAT268353D DE268353C (enrdf_load_stackoverflow) 1947-09-02
FR461932A FR461932A (fr) 1947-09-02 1913-08-27 Procédé et appareil pour la détermination de la densité des gaz, des liquides et des corps solides
US771578A US2635462A (en) 1947-09-02 1947-09-02 Densimeter

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US771578A US2635462A (en) 1947-09-02 1947-09-02 Densimeter

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US2635462A true US2635462A (en) 1953-04-21

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DE (1) DE268353C (enrdf_load_stackoverflow)
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Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754676A (en) * 1954-03-17 1956-07-17 Carl Casey Densimeter
US2845793A (en) * 1954-06-18 1958-08-05 California Research Corp Apparatus for determining the rate of settling of suspensions
US2889702A (en) * 1955-08-08 1959-06-09 Simmonds Aerocessories Ltd Densitometers
US2943476A (en) * 1955-08-08 1960-07-05 Simmonds Aerocessories Ltd Liquid densitometers
US2956431A (en) * 1957-06-28 1960-10-18 Foster M Poole Densimeter
US2974525A (en) * 1953-09-08 1961-03-14 Jr Howard W Cole Flowmeter with specific gravity compensator
US3021711A (en) * 1957-05-10 1962-02-20 Svenska Flygmotor Aktiebolaget Device for measuring pressure or difference of pressure in fluids
US3080750A (en) * 1959-01-09 1963-03-12 Bendix Corp Oscillating mass flowmeter
DE1166506B (de) * 1959-01-26 1964-03-26 Svenska Flygmotor Aktiebolaget Vorrichtung zum Messen von Druecken und Differenzdruecken stroemungsfaehiger Medien
US3159999A (en) * 1961-07-18 1964-12-08 Atlantic Res Corp Method for determining settling in dispersions
US3196844A (en) * 1960-03-30 1965-07-27 Sulzer Ag Method and apparatus for controlling a forced flow steam generator
US3199355A (en) * 1962-01-06 1965-08-10 Schlumberger Prospection Pressure transducers
US3257850A (en) * 1963-11-26 1966-06-28 Rosemount Eng Co Ltd Pressure responsive vibrating tube
US3298221A (en) * 1963-12-30 1967-01-17 Charles E Miller Densitometer
US3377840A (en) * 1966-04-22 1968-04-16 Howard W. Cole Jr. Apparatus for detecting density of fluids
US3516283A (en) * 1966-01-28 1970-06-23 Solartron Electronic Group Methods and apparatus for measuring the densities of fluids by vibrating a hollow body surrounded by the fluid
US3735633A (en) * 1971-03-15 1973-05-29 Itt Function generator and components thereof
US3769831A (en) * 1971-10-13 1973-11-06 Itt Densitometer
US3776024A (en) * 1971-07-09 1973-12-04 Itt Densitometer components
US3910101A (en) * 1972-10-25 1975-10-07 Kratky Otto Dr Dr E H Devices for measuring density
US3955401A (en) * 1973-07-16 1976-05-11 Bell & Howell Company Apparatus for determining the density of a fluid
DE2822087A1 (de) * 1977-06-07 1978-12-14 Halliburton Co Messgeraet zur messung des masseflusses eines stroemenden materials
US4192184A (en) * 1978-11-13 1980-03-11 Halliburton Company Mass flowmeter
FR2439399A1 (fr) * 1978-10-20 1980-05-16 Commissariat Energie Atomique Densimetre a vibrations pour liquide
USRE31450E (en) * 1977-07-25 1983-11-29 Micro Motion, Inc. Method and structure for flow measurement
DE3308289C1 (de) * 1983-03-09 1984-03-15 Bopp & Reuther Gmbh, 6800 Mannheim Dichtmesser für Flüssigkeiten oder Gase
US4491025A (en) * 1982-11-03 1985-01-01 Micro Motion, Inc. Parallel path Coriolis mass flow rate meter
JPS631925A (ja) * 1987-05-25 1988-01-06 マイクロ・モ−ション・インコ−ポレ−テッド 流量計
US4895031A (en) * 1985-08-29 1990-01-23 Micro Motion Inc. Sensor mounting for coriolis mass flow rate meter
US4934196A (en) * 1989-06-02 1990-06-19 Micro Motion, Inc. Coriolis mass flow rate meter having a substantially increased noise immunity
US4996871A (en) * 1989-06-02 1991-03-05 Micro Motion, Inc. Coriolis densimeter having substantially increased noise immunity
US5048349A (en) * 1983-02-21 1991-09-17 Shell Oil Company Coriolis-type mass flow meter comprising at least two straight parallel vibrating tubes
US20120072128A1 (en) * 2009-05-20 2012-03-22 Halliburton Energy Services, Inc. Determining Fluid Density
US8973427B2 (en) 2008-08-15 2015-03-10 Waters Technologies Corporation Apparatus and methods for the measurement of mass related parameters
US20160290133A1 (en) * 2014-10-30 2016-10-06 Halliburton Energy Services, Inc. Downhole sensor for formation fluid property measurement
US10921476B2 (en) * 2014-07-23 2021-02-16 Halliburton Energy Services, Inc. Thermal modulated vibrating sensing module for gas molecular weight detection

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US2974525A (en) * 1953-09-08 1961-03-14 Jr Howard W Cole Flowmeter with specific gravity compensator
US2754676A (en) * 1954-03-17 1956-07-17 Carl Casey Densimeter
US2845793A (en) * 1954-06-18 1958-08-05 California Research Corp Apparatus for determining the rate of settling of suspensions
US2889702A (en) * 1955-08-08 1959-06-09 Simmonds Aerocessories Ltd Densitometers
US2943476A (en) * 1955-08-08 1960-07-05 Simmonds Aerocessories Ltd Liquid densitometers
US3021711A (en) * 1957-05-10 1962-02-20 Svenska Flygmotor Aktiebolaget Device for measuring pressure or difference of pressure in fluids
US2956431A (en) * 1957-06-28 1960-10-18 Foster M Poole Densimeter
US3080750A (en) * 1959-01-09 1963-03-12 Bendix Corp Oscillating mass flowmeter
DE1166506B (de) * 1959-01-26 1964-03-26 Svenska Flygmotor Aktiebolaget Vorrichtung zum Messen von Druecken und Differenzdruecken stroemungsfaehiger Medien
US3196844A (en) * 1960-03-30 1965-07-27 Sulzer Ag Method and apparatus for controlling a forced flow steam generator
US3159999A (en) * 1961-07-18 1964-12-08 Atlantic Res Corp Method for determining settling in dispersions
US3199355A (en) * 1962-01-06 1965-08-10 Schlumberger Prospection Pressure transducers
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US3298221A (en) * 1963-12-30 1967-01-17 Charles E Miller Densitometer
US3516283A (en) * 1966-01-28 1970-06-23 Solartron Electronic Group Methods and apparatus for measuring the densities of fluids by vibrating a hollow body surrounded by the fluid
US3377840A (en) * 1966-04-22 1968-04-16 Howard W. Cole Jr. Apparatus for detecting density of fluids
US3735633A (en) * 1971-03-15 1973-05-29 Itt Function generator and components thereof
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US3769831A (en) * 1971-10-13 1973-11-06 Itt Densitometer
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DE2822087A1 (de) * 1977-06-07 1978-12-14 Halliburton Co Messgeraet zur messung des masseflusses eines stroemenden materials
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FR2439399A1 (fr) * 1978-10-20 1980-05-16 Commissariat Energie Atomique Densimetre a vibrations pour liquide
US4192184A (en) * 1978-11-13 1980-03-11 Halliburton Company Mass flowmeter
US4491025A (en) * 1982-11-03 1985-01-01 Micro Motion, Inc. Parallel path Coriolis mass flow rate meter
US5048349A (en) * 1983-02-21 1991-09-17 Shell Oil Company Coriolis-type mass flow meter comprising at least two straight parallel vibrating tubes
DE3308289C1 (de) * 1983-03-09 1984-03-15 Bopp & Reuther Gmbh, 6800 Mannheim Dichtmesser für Flüssigkeiten oder Gase
US4895031A (en) * 1985-08-29 1990-01-23 Micro Motion Inc. Sensor mounting for coriolis mass flow rate meter
JPS631925A (ja) * 1987-05-25 1988-01-06 マイクロ・モ−ション・インコ−ポレ−テッド 流量計
US4934196A (en) * 1989-06-02 1990-06-19 Micro Motion, Inc. Coriolis mass flow rate meter having a substantially increased noise immunity
US4996871A (en) * 1989-06-02 1991-03-05 Micro Motion, Inc. Coriolis densimeter having substantially increased noise immunity
US8973427B2 (en) 2008-08-15 2015-03-10 Waters Technologies Corporation Apparatus and methods for the measurement of mass related parameters
US20120072128A1 (en) * 2009-05-20 2012-03-22 Halliburton Energy Services, Inc. Determining Fluid Density
US9008977B2 (en) * 2009-05-20 2015-04-14 Halliburton Energy Services, Inc. Determining fluid density
US10921476B2 (en) * 2014-07-23 2021-02-16 Halliburton Energy Services, Inc. Thermal modulated vibrating sensing module for gas molecular weight detection
US20160290133A1 (en) * 2014-10-30 2016-10-06 Halliburton Energy Services, Inc. Downhole sensor for formation fluid property measurement
US10012077B2 (en) * 2014-10-30 2018-07-03 Halliburton Energy Services, Inc. Downhole sensor for formation fluid property measurement

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FR461932A (fr) 1914-01-14

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