GB666451A - Improvements in or relating to electrical level indicating devices - Google Patents

Improvements in or relating to electrical level indicating devices

Info

Publication number
GB666451A
GB666451A GB26465/49A GB2646549A GB666451A GB 666451 A GB666451 A GB 666451A GB 26465/49 A GB26465/49 A GB 26465/49A GB 2646549 A GB2646549 A GB 2646549A GB 666451 A GB666451 A GB 666451A
Authority
GB
United Kingdom
Prior art keywords
hopper
valve
wheatstone bridge
interchanged
resultant
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
GB26465/49A
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.)
Preparation Industrielle des Combustibles SA
Original Assignee
Preparation Industrielle des Combustibles SA
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 by Preparation Industrielle des Combustibles SA filed Critical Preparation Industrielle des Combustibles SA
Publication of GB666451A publication Critical patent/GB666451A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/243—Schematic arrangements of probes combined with measuring circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

666,451. Indicating level in a hopper. PREPARATION INDUSTRIELLE DES COMBUSTIBLES. Oct. 14, 1949. [April 15, 1949] No. 26465/49. Addition to 665,409, [Group XXXV]. Class 78 (i). The invention comprises a modification of the invention claimed in claim 2 of the parent Specification, wherein the two electrical connections from the wheatstone bridge respectively to the grid and cathode of the electronic tube are interchanged and the polarity of the D.C. supply to the Wheatstone bridge is reversed. Fig. 2. The resistance between the two electrodes in the hopper are included as Re in Wheatstone bridge W formed of elements a, b, m, Re, potential difference U1 being applied between two corners of said bridge, the resultant p.d. between the other two corners being applied between filament and grid of valve Tu, the H.T. of which is applied through variable resistance W. The resultant p.d. is applied to thyratron valve Th and the current passing through the latter valve 'is measured at M. M shows a sharp change of current reading when the material in the hopper reaches the electrode at the predetermined height. The p.d's used may be alternating, either in or out of phase; and resistances m and Re may be interchanged.
GB26465/49A 1949-04-15 1949-10-14 Improvements in or relating to electrical level indicating devices Expired GB666451A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR666451X 1949-04-15

Publications (1)

Publication Number Publication Date
GB666451A true GB666451A (en) 1952-02-13

Family

ID=9013874

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26465/49A Expired GB666451A (en) 1949-04-15 1949-10-14 Improvements in or relating to electrical level indicating devices

Country Status (1)

Country Link
GB (1) GB666451A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972695C (en) * 1952-02-07 1959-09-10 Koppers Gmbh Heinrich Method and device for displaying the filling status of bunkers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972695C (en) * 1952-02-07 1959-09-10 Koppers Gmbh Heinrich Method and device for displaying the filling status of bunkers

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