FR2269708A1 - Level indicator for liquid in a tube - has moving mirror system and scale viewed through optical system - Google Patents

Level indicator for liquid in a tube - has moving mirror system and scale viewed through optical system

Info

Publication number
FR2269708A1
FR2269708A1 FR7513412A FR7513412A FR2269708A1 FR 2269708 A1 FR2269708 A1 FR 2269708A1 FR 7513412 A FR7513412 A FR 7513412A FR 7513412 A FR7513412 A FR 7513412A FR 2269708 A1 FR2269708 A1 FR 2269708A1
Authority
FR
France
Prior art keywords
tube
scale
liquid
level indicator
moving mirror
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.)
Granted
Application number
FR7513412A
Other languages
English (en)
French (fr)
Other versions
FR2269708B1 (online.php
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.)
Seetru Ltd
Original Assignee
Seetru 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
Application filed by Seetru Ltd filed Critical Seetru Ltd
Publication of FR2269708A1 publication Critical patent/FR2269708A1/fr
Application granted granted Critical
Publication of FR2269708B1 publication Critical patent/FR2269708B1/fr
Granted 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
    • G01F23/28—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 the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G01F23/292—Light, e.g. infrared or ultraviolet

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Level Indicators Using A Float (AREA)
FR7513412A 1974-04-30 1975-04-29 Level indicator for liquid in a tube - has moving mirror system and scale viewed through optical system Granted FR2269708A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1884374 1974-04-30

Publications (2)

Publication Number Publication Date
FR2269708A1 true FR2269708A1 (en) 1975-11-28
FR2269708B1 FR2269708B1 (online.php) 1982-01-08

Family

ID=10119360

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7513412A Granted FR2269708A1 (en) 1974-04-30 1975-04-29 Level indicator for liquid in a tube - has moving mirror system and scale viewed through optical system

Country Status (1)

Country Link
FR (1) FR2269708A1 (online.php)

Also Published As

Publication number Publication date
FR2269708B1 (online.php) 1982-01-08

Similar Documents

Publication Publication Date Title
ES460681A1 (es) Un metodo con su aparato correspondiente para conservar y me-dir deterioro en un area inaccesible.
CH494410A (fr) Dispositif de réglage auxiliaire pour instrument d'optique
BE749875A (fr) Dispositif de pointage optique pour fusil
US3349234A (en) Illuminating apparatus
CH430235A (de) Stativ für optische Instrumente, insbesondere Filmkameras
CH449290A (de) Verstelleinrichtung für optische Apparate, insbesondere für Objektive mit veränderbarer Brennweite
GB1460158A (en) Instrument for determining the characteristics of a lens
US2704960A (en) Stereoscopic plotting instrument
GB1150699A (en) Optical Viewing Device
JPS53144366A (en) Movement measuring method of objects
BE792931A (fr) Dispositif de stabilisation de l'image d'un instrument d'optique soumisa des vibrations angulaires
GB599955A (en) Levelling instrument
JPS533256A (en) Instrument for measuring focal length by measuring lens magnification
SU147809A1 (ru) Зеркально-линзовый телеобъектив
GB1225035A (en) Optical viewing systems
GB971276A (en) Optical comparison apparatus
KHATISOV Astrometric investigation of the 70-cm meniscus telescope at the Abastuman Observatory(Prime-focus field of Maksutov telescope system on Mount Kanobil, U. S. S. R. noting objective, mirror and tests for distortion and accuracy in astrometry)
JPS57161607A (en) Measuring device for object size
SU135664A1 (ru) Зеркальный умножитель с параллельными зеркалами
GB1460946A (en) Eye examining instrument
GB1276283A (en) Compass-bearing optical instruments
SU121566A1 (ru) Горный тахеометр
FR2295475A1 (fr) Dispositif stabilisateur de visee optique
GB1286421A (en) Optical device for testing alignment and direction
FR1524893A (fr) Dispositif à éléments optiques déplaçables pour objectifs à distance focale variable

Legal Events

Date Code Title Description
ST Notification of lapse