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GB1295617A - - Google Patents

Info

Publication number
GB1295617A
GB1295617A GB1295617DA GB1295617A GB 1295617 A GB1295617 A GB 1295617A GB 1295617D A GB1295617D A GB 1295617DA GB 1295617 A GB1295617 A GB 1295617A
Authority
GB
United Kingdom
Prior art keywords
paddle
spring
housing
pick
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1295617A publication Critical patent/GB1295617A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N11/00Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
    • G01N11/10Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
    • G01N11/16Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by measuring damping effect upon oscillatory body
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/002Investigating 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

Landscapes

  • 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)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

1295617 Measuring physical properties, electrically AUTOMATION PRODUCTS Inc 2 July 1971 31032/71 Heading G1N In apparatus for measuring density, viscosity, or material interface or level, of the type in which a paddle 12 on an elongate flexible spring 14 is vibrated in the investigated material and the amplitude or resonant frequency of the vibrations is measured, unwanted effects (due e. g. to temperature changes, corrosion, wear or adhesion of material to the paddle) are compensated by comparing the results of two measurements made with different effective areas of the paddle. In Fig. 1, the paddle 12 has a large effective area 32 and a small effective area 46 and respective electromagnetic vibrators 19, 29 and pick-ups 21, 31. The spring 14 is fixed to a housing (50) at its end 16 remote from the paddle. The housing has an externally screw-threaded tubular portion (52) for fixing to a vessel containing the material. Alternatively, Fig. 5 (not shown), the spring (14a) may be fixed to the housing at a point between the location of the drive and pick-up means and the paddle. In another arrangement Fig. 6 (not shown), only one set of drive and pickup means is provided and the spring and paddle assembly is axially rotatable to obtain the different effective areas of the paddle. The comparison may be the difference of or the ratio of the squares of the resonant frequencies.
GB1295617D 1971-07-02 1971-07-02 Expired GB1295617A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3103271 1971-07-02

Publications (1)

Publication Number Publication Date
GB1295617A true GB1295617A (en) 1972-11-08

Family

ID=10316916

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1295617D Expired GB1295617A (en) 1971-07-02 1971-07-02

Country Status (1)

Country Link
GB (1) GB1295617A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139354A (en) * 1983-05-03 1984-11-07 British Hydromechanics Monitoring process conditions
GB2152665A (en) * 1984-01-03 1985-08-07 Ae Cds Autoclave Inc Liquid level detection
GB2184541A (en) * 1985-12-20 1987-06-24 Clevite Ind Inc Liquid level indicator system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139354A (en) * 1983-05-03 1984-11-07 British Hydromechanics Monitoring process conditions
EP0124383A1 (en) * 1983-05-03 1984-11-07 National Research Development Corporation Monitoring physical properties of a fluid
WO1984004388A1 (en) * 1983-05-03 1984-11-08 British Hydromechanics Monitoring physical properties of a fluid
US4594883A (en) * 1983-05-03 1986-06-17 The British Hydromechanics Research Assoc. Monitoring physical properties of a fluid
GB2152665A (en) * 1984-01-03 1985-08-07 Ae Cds Autoclave Inc Liquid level detection
GB2184541A (en) * 1985-12-20 1987-06-24 Clevite Ind Inc Liquid level indicator system

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee