GB839092A - Improvements in or modifications of apparatus for detecting the presence or absence at a location of a body of material - Google Patents

Improvements in or modifications of apparatus for detecting the presence or absence at a location of a body of material

Info

Publication number
GB839092A
GB839092A GB1391258A GB1391258A GB839092A GB 839092 A GB839092 A GB 839092A GB 1391258 A GB1391258 A GB 1391258A GB 1391258 A GB1391258 A GB 1391258A GB 839092 A GB839092 A GB 839092A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
rod
coil
level
material
polepiece
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
GB1391258A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danks Holding Ltd
Original Assignee
Danks Holding Ltd
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

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
    • G01F23/22Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm by measurement of physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm by measurement of physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electric or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296Acoustic waves
    • G01F23/2966Acoustic waves making use of acoustical resonance or standing waves
    • G01F23/2967Acoustic waves making use of acoustical resonance or standing waves for discrete levels

Abstract

839,092. Control of level in hoppers. BAILEY METERS & CONTROLS Ltd. May 1, 1958, No. 13912/58. Addition to 821,148. Class 78 (1). [Also in Groups XVIII and XXXV] The level indicating and controlling device described in the parent Specification is modified in that the sensing member is caused to vibrate transversely of its axis rather than longitudinally. As shown, the member consists of a rod 4 welded at its mid-point into an aperture 3 in the wall 1 of a container 2. The outer end part 9 of the rod is of ferromagnetic material and is disposed between a polepiece 7 of a solenoid coil 6 and a pick-up coil 11. The coil 11 is connected to a feed-back amplifier 14 (see Group XXXV) which is also connected to the coil 6 energizing the polepiece 7. In operation, the circuit consisting of the coil 11, the feed-back amplifier 14 and the coil 6 is arranged to oscillate at a natural resonant frequency of the rod 4, causing transverse vibrations of the rod which are maintained whilst the level of material in the container is below the inner end 18 of the rod. When the material level is at or above that of the rod the vibrations are damped and the oscillations in the said circuit cease, whereupon a relay stage 16 operates an alarm or control device 17. To increase the sensitivity of the rod to damping a vertical plate may be affixed in a slot in the inner end of the rod.
GB1391258A 1958-05-01 1958-05-01 Improvements in or modifications of apparatus for detecting the presence or absence at a location of a body of material Expired GB839092A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1391258A GB839092A (en) 1958-05-01 1958-05-01 Improvements in or modifications of apparatus for detecting the presence or absence at a location of a body of material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1391258A GB839092A (en) 1958-05-01 1958-05-01 Improvements in or modifications of apparatus for detecting the presence or absence at a location of a body of material

Publications (1)

Publication Number Publication Date
GB839092A true true GB839092A (en) 1960-06-29

Family

ID=10031640

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1391258A Expired GB839092A (en) 1958-05-01 1958-05-01 Improvements in or modifications of apparatus for detecting the presence or absence at a location of a body of material

Country Status (1)

Country Link
GB (1) GB839092A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213438A (en) * 1962-01-11 1965-10-19 Gen Motors Corp Feedback controlled sonic liquid detector
JPS4821659U (en) * 1971-07-15 1973-03-12
US4008613A (en) * 1975-10-03 1977-02-22 Ludlow Industries, Inc. Vibratory bin level indicators
US4107994A (en) * 1975-07-21 1978-08-22 Sanko Air Plant Ltd. Level detector
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
GB2192059A (en) * 1986-06-26 1987-12-31 Electricity Council Method of and apparatus for determining characteristics of a fluid
US5035140A (en) * 1988-11-03 1991-07-30 The Boeing Company Self cleaning liquid level detector
GB2268807A (en) * 1992-07-17 1994-01-19 Xerox Corp Detection of material consumption

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213438A (en) * 1962-01-11 1965-10-19 Gen Motors Corp Feedback controlled sonic liquid detector
JPS4821659U (en) * 1971-07-15 1973-03-12
US4107994A (en) * 1975-07-21 1978-08-22 Sanko Air Plant Ltd. Level detector
US4008613A (en) * 1975-10-03 1977-02-22 Ludlow Industries, Inc. Vibratory bin level indicators
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
GB2192059A (en) * 1986-06-26 1987-12-31 Electricity Council Method of and apparatus for determining characteristics of a fluid
GB2192059B (en) * 1986-06-26 1990-08-22 Electricity Council Method of and apparatus for determining characteristics of a fluid
US5035140A (en) * 1988-11-03 1991-07-30 The Boeing Company Self cleaning liquid level detector
GB2268807A (en) * 1992-07-17 1994-01-19 Xerox Corp Detection of material consumption
GB2268807B (en) * 1992-07-17 1996-09-18 Xerox Corp Detection of material consumption

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