WO1979000019A1 - Apparatus for metering or distributing the volume of liquids - Google Patents

Apparatus for metering or distributing the volume of liquids Download PDF

Info

Publication number
WO1979000019A1
WO1979000019A1 PCT/SE1978/000011 SE7800011W WO7900019A1 WO 1979000019 A1 WO1979000019 A1 WO 1979000019A1 SE 7800011 W SE7800011 W SE 7800011W WO 7900019 A1 WO7900019 A1 WO 7900019A1
Authority
WO
WIPO (PCT)
Prior art keywords
vessel
scale
dosage
graduations
graduation
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.)
Ceased
Application number
PCT/SE1978/000011
Other languages
French (fr)
Inventor
J Andersson
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
Priority to DE19782856922 priority Critical patent/DE2856922A1/en
Publication of WO1979000019A1 publication Critical patent/WO1979000019A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F19/00—Calibrated capacity measures for fluids or fluent solid material, e.g. measuring cups
    • 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

Definitions

  • the present invention relates to an apparatus for metering or distributing of liquids.
  • the apparatus according to the invention comprises an inner vessel for accomodating the liquid, the volume of which is to be metered, and an outer vessel surrounding the inner vessel and providedwith a volume graduation scale.
  • the invention is based on the principle that the volume graduation scale is mounted outside the inner vessel, total internal reflection occuring when liquid is poured into the inner vessel, owing to that the ray of light from a graduation mark being covered by the liquid, by refraction in media with different optical densities is subject to total internal reflection so that it appears to the eye that the volume graduation scale disappears from below as liquid is poured into the vessel.
  • Metering is also facilitated in that during metering it is possible to read the volume graduation scale from above while the apparatus is standing upright, e.g. on a table.
  • the apparatus according to the invention can be utilized in all areas where it is required to meter small or medium large liquid volumes, e.g. it can be utilized for medicine dosages.
  • the object of the invention is to achieve an apparatus for metering of liquids into an ungraduated dosage vessel having bottom and side walls defining an upper mouth, at least a portion of one side wall being substantially vertical, transparent and arranged for coaction with a graduated scale, placed outside said portion, said scale being separated from the outside of the vessel portion by an air gap, whereby light rays from the scale graduations pass through the interface at the inner surface of the vessel wall when it is empty, so that the graduations are visible from the mouth of the vessel, whereas said rays are totally internally reflected at the interface between the inner surface of the vessel wall and the liquid when the vessel is filled with liquid above the graduation mark in question, since the liquid has a greater refraction index than air, the graduation mark thus being no longer visible from the mouth of the vessel.
  • Another object of the invention is to achieve an apparatus for metering by arranging the scale on an outer vessel surrounding the dosage vessel whereat in one embodiment both said vessels having tapered side walls.
  • the graduations are arranged on the inner surface of the outer vessel side v/all or the scale may be arranged on the outer surface of the outer vessel side wall if saidwall is transparent.
  • the apparatus comprises an outer vessel 1 surrounding an inner vessel 2 with a small gap or slot between them, the liquid to be volumetrically metered being poured into the inner vessel 2.
  • a graduation scale 3 is arranged on the interior side wall of the outer vessel 1.
  • the reference numeral 4 denotes the level of the liquid in the inner vessel 2. If the liquid level 4 is observed from above in the way indicated in the figure, a boundary ray of light 5 at the interface between the liquid level 4 and the interior side wall of the inner vessel 2 will be refracted substantially in the way denoted in the figure from the graduation scale 3.
  • a ray of light inside this boundary ray of light e.g. the ray denoted by the numeral 6 in the figure, will on the other hand be totally internally reflected.
  • the light ray 6 from a mark of the section of the graduation scale situated under the mark represented by the ray 5 will by total internal reflection "disappear" and will not be visible to the eye.
  • the light thus goes from a graduation mark of the volume graduation scale being arranged outside the inner vessel and with a gap between them, through media of different optical densities in such a way that the ray will be totally internally reflected.
  • the portion of the graduation scale 3 lying under the liquid level will not be visible, which facilitates the metering as it is possible to read the graduation scale from above.
  • the invention thereby eliminates the need of lifting up the vessel to eye level in order to read off the the graduation scale, as with ordinary simple measuring vessels provided with a graduation scale.
  • the inner vessel 2 is transparent, or has at least a transparent vertical portion through which the graduation scale 3 can be observed.
  • the outer vessel 1 is not transparent or is opaque and the graduation scale is on the inside surface of the vessel.
  • a stand or rack can be .used, adapted to the inner vessel and having a scale interacting with the vertical transparent party of the metering vessel.
  • a transparent outer vessel 1 In the latter case, the graduation scale can then be placed on the outer surface of the vessel, although this is not necessary.
  • the air space between the outer and inner vessels has been exaggerated for the sake of clarity.
  • an outer vessel 1 may, for example, be used as a base unit together with a large number of individual inner vessels 2, which are in turn placed in the outer vessel for filling or metering with a controlled volume.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Abstract

An apparatus for metering liquids into ungraduated dosage vessels (2) having bottom and side walls defining an upper mouth, at least a portion of one side wall being substantially vertical, transparent and arranged for coaction with a graduated scale (3), placed outside said portion, said scale (3) being separated from the outside of the vessel portion by an air gap, whereby light rays (5) from the scale graduations (3) pass through the interface at the inner surface of the vessel (2) wail when it is empty, so that the graduations (3) are visible from the mouth of the vessel, whereas said rays are totally internally reflected (6) when the vessel is filled with liquid (4) above the graduation mark in question, since the liquid has a greater refraction index than air, the graduation mark (3) thus being no longer visible from the mouth of the vessel (2). Metering is facilitated by the possibility of reading off the volume graduation scale (3) from above while the liquid is being poured into the vessel (2) and the apparatus is supported by a horizontal substructure such as a table. Metering can be executed for a large number of ungraduated dosage vessels (3) using one and the same means (1) provided a graduation scale (3). The apparatus is particularly suitable for doses of medicine.

Description

APPARATUS FOR METERING OR DISTRIBUTING THE VOLUME OF LIQUIDS
The present invention relates to an apparatus for metering or distributing of liquids. The apparatus according to the invention comprises an inner vessel for accomodating the liquid, the volume of which is to be metered, and an outer vessel surrounding the inner vessel and providedwith a volume graduation scale. The invention is based on the principle that the volume graduation scale is mounted outside the inner vessel, total internal reflection occuring when liquid is poured into the inner vessel, owing to that the ray of light from a graduation mark being covered by the liquid, by refraction in media with different optical densities is subject to total internal reflection so that it appears to the eye that the volume graduation scale disappears from below as liquid is poured into the vessel. Metering is also facilitated in that during metering it is possible to read the volume graduation scale from above while the apparatus is standing upright, e.g. on a table.
The apparatus according to the invention can be utilized in all areas where it is required to meter small or medium large liquid volumes, e.g. it can be utilized for medicine dosages.
The object of the invention is to achieve an apparatus for metering of liquids into an ungraduated dosage vessel having bottom and side walls defining an upper mouth, at least a portion of one side wall being substantially vertical, transparent and arranged for coaction with a graduated scale, placed outside said portion, said scale being separated from the outside of the vessel portion by an air gap, whereby light rays from the scale graduations pass through the interface at the inner surface of the vessel wall when it is empty, so that the graduations are visible from the mouth of the vessel, whereas said rays are totally internally reflected at the interface between the inner surface of the vessel wall and the liquid when the vessel is filled with liquid above the graduation mark in question, since the liquid has a greater refraction index than air, the graduation mark thus being no longer visible from the mouth of the vessel.
Another object of the invention is to achieve an apparatus for metering by arranging the scale on an outer vessel surrounding the dosage vessel whereat in one embodiment both said vessels having tapered side walls. In a further embodiment of the invention the graduations are arranged on the inner surface of the outer vessel side v/all or the scale may be arranged on the outer surface of the outer vessel side wall if saidwall is transparent.
The invention will now be described in detail while referring to the attached drawing, which shows the apparatus according to the present invention in a schematic perspective view with partially broken-away portions.
The apparatus according to the invention comprises an outer vessel 1 surrounding an inner vessel 2 with a small gap or slot between them, the liquid to be volumetrically metered being poured into the inner vessel 2. A graduation scale 3 is arranged on the interior side wall of the outer vessel 1. The reference numeral 4 denotes the level of the liquid in the inner vessel 2. If the liquid level 4 is observed from above in the way indicated in the figure, a boundary ray of light 5 at the interface between the liquid level 4 and the interior side wall of the inner vessel 2 will be refracted substantially in the way denoted in the figure from the graduation scale 3.
A ray of light inside this boundary ray of light, e.g. the ray denoted by the numeral 6 in the figure, will on the other hand be totally internally reflected. The light ray 6 from a mark of the section of the graduation scale situated under the mark represented by the ray 5 will by total internal reflection "disappear" and will not be visible to the eye. For these more "central" rays 6 the light thus goes from a graduation mark of the volume graduation scale being arranged outside the inner vessel and with a gap between them, through media of different optical densities in such a way that the ray will be totally internally reflected. Thus the portion of the graduation scale 3 lying under the liquid level will not be visible, which facilitates the metering as it is possible to read the graduation scale from above. The invention thereby eliminates the need of lifting up the vessel to eye level in order to read off the the graduation scale, as with ordinary simple measuring vessels provided with a graduation scale.
In the embodiment of the invention described above the inner vessel 2 is transparent, or has at least a transparent vertical portion through which the graduation scale 3 can be observed. In this embodiment the outer vessel 1 is not transparent or is opaque and the graduation scale is on the inside surface of the vessel.
Instead of a complete outer vessel a stand or rack can be .used, adapted to the inner vessel and having a scale interacting with the vertical transparent party of the metering vessel. However, it is also possible to utlize a transparent outer vessel 1. In the latter case, the graduation scale can then be placed on the outer surface of the vessel, although this is not necessary. In the arrangement shown in the figure, the air space between the outer and inner vessels has been exaggerated for the sake of clarity.
Within the scope of the basic idea of the invention, an outer vessel 1 may, for example, be used as a base unit together with a large number of individual inner vessels 2, which are in turn placed in the outer vessel for filling or metering with a controlled volume.
One skilled in the art will appreciate that the embodiment of the invention described above can be modofied and varied in many ways within the scope of the basic idea for the invention.

Claims

Claims
1. Apparatus for metering liquids into an ungraduated dosage vessel having bottom and side walls defining .an upper mouth at least a portion of one side wall being substatially vertical and transparent, characterized in that the vertical transparent portion of the dosage vessel is arranged for coaction with a graduated scale, placed outside said portion, said scale being separated from the outside of the dosage vessel portion by an air gap whereby light rays from the scale graduations pass through the interface at the inner surface of the vessel when the vessel is empty, so that the graduations are visible from the mouth of the vessel, whereas said rays are totally internally reflected at the interface between the inner surface of the vessel wall and the liquid when the vessel is filled with liquid - of course having greater refraction index than air - the graduation mark thus being nolonger visible from the mouth of the vessel.
2. Apparatus as claimed in claim 1, characterized in that the graduation scale is applied on an outer vessel enclosing the dosage vessel.
3. Apparatus as claimed in claim 2 or 3, characterized in that the dosage vessel and the outer vessel both are formed with tapered side walls.
4, Apparatus as claimed in claim 2 or 3 characterized in that the graduations are applied on the inner surface of the outer vessel side wall.
5. Apparatus as claimed in claim 2 or 3, characterized in that the outer vessel is transparent and that the graduation scale is applied on the outer surface of the outer vessel side wall. AMENDED CLAIMS
(received by the International Bureau on 27 November 1978 (27.11.78))
1. Apparatus for metering liquids into an ungraduated dosage vessel having bottom and side walls defining an upper mouth, at least a portion of one side wall being substantially vertical and transparent, c h a r a c t e r i z e d in that the vertical transparent portion of the dosage vessel is arranged for coaction with a graduated scale, placed outside said portion, said scale facing the dosage vessel and being separated from the outside of the dosage vessel portion by an air gap whereby light rays from the scale graduations pass through the interface at the inner surface of the vessel when the vessel is empty, so that the graduations are visible from above the mouth of the vessel, whereas said rays are totally internally reflected at the interface between the inner surface of the vessel wall and the liquid when the vessel is filled with liquid - of course having greatecrrrefraction index than air - the graduation mark thus being no longer visible from the mouth of the vessel.
2. Apparatus as claimed in claim 1, characterized in that the graduation scale is applied on an outer vessel enclosing the dosage vessel.
3. Apparatus as claimed in claim 2 or 3, characterized in that the dosage vessel and the outer vessel both are formed with tapered side walls.
4. Apparatus as claimed in claim 2 or 3, characterized in that the graduations are applied on the inner surface of the outer vessel side wall.
5. Apparatus as claimed in claim 2 or 3. characterized in that the outer vessel is transparent and that the graduation scale is applied on the outer surface of the outer vessel side wall. STATEMENT UNDER ARTICLE 19
Claim 1 has been amended by inserting the words "facing the dosage vessel" after the words "said scale" in claim 1, line 6 and inserting "above" at the end of line 9 after "from". By these small amendments the invention has been described more clearly and delimited from all the documents cited in the International Search Report mailed 1978-10-03.
PCT/SE1978/000011 1977-02-15 1978-06-30 Apparatus for metering or distributing the volume of liquids Ceased WO1979000019A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782856922 DE2856922A1 (en) 1977-06-30 1978-06-30 APPARATUS FOR METERING OR DISTRIBUTING THE VOLUME OF LIQUIDS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7701630 1977-02-15
SE7701630A SE408485B (en) 1977-06-30 1977-06-30 DEVICE FOR SATURATION OR DOSAGE OF VETSKORS VOLUME

Publications (1)

Publication Number Publication Date
WO1979000019A1 true WO1979000019A1 (en) 1979-01-11

Family

ID=20330451

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1978/000011 Ceased WO1979000019A1 (en) 1977-02-15 1978-06-30 Apparatus for metering or distributing the volume of liquids

Country Status (5)

Country Link
EP (1) EP0011614A1 (en)
FR (1) FR2473703A1 (en)
GB (1) GB2036949B (en)
SE (1) SE408485B (en)
WO (1) WO1979000019A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0451689A3 (en) * 1990-04-11 1991-11-27 Braun Aktiengesellschaft Level indicator for a water reservoir of a household appliance

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB202316790D0 (en) * 2023-11-02 2023-12-20 Mein Measurement Ltd Method and devices for measurements involving fluids

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1564470A (en) * 1923-10-29 1925-12-08 Alvie C Crimmel Measuring cup
US2174700A (en) * 1935-07-31 1939-10-03 Lawrence P Kellogg Liquid level indicator
DE944584C (en) * 1952-08-27 1956-06-21 Fritz Ehrenstein Logarithmic measuring and calculating vessel
SE318061B (en) * 1966-06-30 1969-12-01 L Righard

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1564470A (en) * 1923-10-29 1925-12-08 Alvie C Crimmel Measuring cup
US2174700A (en) * 1935-07-31 1939-10-03 Lawrence P Kellogg Liquid level indicator
DE944584C (en) * 1952-08-27 1956-06-21 Fritz Ehrenstein Logarithmic measuring and calculating vessel
SE318061B (en) * 1966-06-30 1969-12-01 L Righard

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0451689A3 (en) * 1990-04-11 1991-11-27 Braun Aktiengesellschaft Level indicator for a water reservoir of a household appliance

Also Published As

Publication number Publication date
SE408485B (en) 1979-06-11
GB2036949B (en) 1982-07-07
EP0011614A1 (en) 1980-06-11
SE7701630L (en) 1978-12-31
FR2473703A1 (en) 1981-07-17
GB2036949A (en) 1980-07-02

Similar Documents

Publication Publication Date Title
US3548657A (en) Device for an outside display of the level of a liquid contained within a tank
US3120125A (en) Liquid level determining devices and method
RU1835077C (en) Device for determination the quantity of blood components in a sample of centrifugal blood
US6690475B2 (en) Volume measurement system and method for volume element counting
FR2487975B1 (en) BAR PROBE FOR CAPACITIVE MEASUREMENT OF THE FILLING STATE OF A TANK AND MEASURING DEVICE RELATING THERETO
WO1979000019A1 (en) Apparatus for metering or distributing the volume of liquids
US3880012A (en) Integral shaded area on single mark vessel to aid in view of meniscus
ATE190717T1 (en) LIQUID VOLUME MEASUREMENT DEVICE
US4375765A (en) Level indicating device
CA1106643A (en) Apparatus for measuring liquid volumes
SU1578490A1 (en) Reading-off device for master batcher
SU1620852A1 (en) Device for graduating reservoirs
NL7808085A (en) Liq. e.g. medicament metering device - has scale marked on outer vessel with non-graduated inner vessel including transparent portion allowing liq. level to be read from above
SU667891A1 (en) Device for measuring urine specific weight
RU2014572C1 (en) Discrete optical level meter
RU1809316C (en) Device for liquid level metering in tank
US4059995A (en) Level indicators for liquids
KR810000310Y1 (en) Flow meter on oil combustor
US1421739A (en) Manometer
NO782494L (en) DEVICE FOR DOSAGE OF LIQUIDS.
US4422244A (en) Elevation indicator
RU2187079C1 (en) Fiber-optic meter of liquid volume and level
SU151066A1 (en) Demonstration device for determining the refractive index of light in a transparent liquid
US2683372A (en) Fluid level indicating gauge
SU151095A1 (en) Instrument for determining the physical properties of solids

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): DE GB US

Designated state(s): DE GB US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): FR

Designated state(s): FR

RET De translation (de og part 6b)

Ref country code: DE

Ref document number: 2856922

Date of ref document: 19810129

Format of ref document f/p: P