FR2394069A1 - Optical liq. level indicator for domestic appliances - has light conducting rod with reflecting surface when not immersed, and has coloured reflecting plate - Google Patents

Optical liq. level indicator for domestic appliances - has light conducting rod with reflecting surface when not immersed, and has coloured reflecting plate

Info

Publication number
FR2394069A1
FR2394069A1 FR7817209A FR7817209A FR2394069A1 FR 2394069 A1 FR2394069 A1 FR 2394069A1 FR 7817209 A FR7817209 A FR 7817209A FR 7817209 A FR7817209 A FR 7817209A FR 2394069 A1 FR2394069 A1 FR 2394069A1
Authority
FR
France
Prior art keywords
immersed
level indicator
liq
rod
optical
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.)
Withdrawn
Application number
FR7817209A
Other languages
French (fr)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of FR2394069A1 publication Critical patent/FR2394069A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/087—Water level measuring or regulating devices
    • 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
    • G01F23/2921—Light, e.g. infrared or ultraviolet for discrete levels
    • G01F23/2922—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Cookers (AREA)

Abstract

The appliances are dishwashers, washing machines etc. The level indicator has a light guiding rod, with a light inlet surface at its top end and at least one surface at its bottom end. pref. at an angle of 45 deg. to the rod axis, reflecting light when not immersed into the liquid. A coloured plate is provided at the rod bottom end, parallel to the rod axis and at an angle of 45 deg. to the reflecting surface. The coloured plate (17) is light reflecting, mounted on the rod (12) outer surface. The upper end of the rod is equipped with a convex surface (14).
FR7817209A 1977-06-10 1978-06-08 Optical liq. level indicator for domestic appliances - has light conducting rod with reflecting surface when not immersed, and has coloured reflecting plate Withdrawn FR2394069A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772726082 DE2726082A1 (en) 1977-06-10 1977-06-10 OPTICAL LIQUID LEVEL INDICATOR, ESPECIALLY FOR HOUSEHOLD APPLIANCES, SUCH AS DISHWASHERS AND WASHING MACHINES, WITH A LIGHT CONDUCTING BAR

Publications (1)

Publication Number Publication Date
FR2394069A1 true FR2394069A1 (en) 1979-01-05

Family

ID=6011120

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7817209A Withdrawn FR2394069A1 (en) 1977-06-10 1978-06-08 Optical liq. level indicator for domestic appliances - has light conducting rod with reflecting surface when not immersed, and has coloured reflecting plate

Country Status (3)

Country Link
DE (1) DE2726082A1 (en)
FR (1) FR2394069A1 (en)
IT (1) IT1095183B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1532917A1 (en) * 2003-11-21 2005-05-25 Electrolux Home Products Corporation N.V. Household-type dishwashing machine with improved light indicators

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI78564C (en) * 1986-09-30 1989-08-10 Moistic Oy FUKTIGHETSINDIKATOR.
US4880990A (en) * 1988-06-13 1989-11-14 Imo Industries, Inc. Optical liquid-level sensing apparatus
US5279157A (en) * 1992-08-03 1994-01-18 Casco Products Corporation Liquid level monitor
US6057772A (en) * 1997-11-13 2000-05-02 Henny Penny Corporation Apparatus and method for optically sensing liquid level in cooking vessels
DE102010040690A1 (en) 2010-09-14 2012-03-15 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher, has sensor device for equipment acquisition in operating fluid supply container and detecting operating fluid remaining quantity corresponding to service agent dose for washing process
DE102015224946A1 (en) * 2015-12-11 2017-06-14 BSH Hausgeräte GmbH Combined optical tank and level detection system
CN111380593B (en) * 2020-04-21 2021-12-24 罗克希尔自动化有限公司 Radar level meter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1532917A1 (en) * 2003-11-21 2005-05-25 Electrolux Home Products Corporation N.V. Household-type dishwashing machine with improved light indicators

Also Published As

Publication number Publication date
DE2726082A1 (en) 1978-12-21
IT1095183B (en) 1985-08-10
IT7824215A0 (en) 1978-06-05

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Legal Events

Date Code Title Description
ST Notification of lapse