EP1563253A2 - Tube de niveau a bulle d'air a fort contraste - Google Patents

Tube de niveau a bulle d'air a fort contraste

Info

Publication number
EP1563253A2
EP1563253A2 EP03811035A EP03811035A EP1563253A2 EP 1563253 A2 EP1563253 A2 EP 1563253A2 EP 03811035 A EP03811035 A EP 03811035A EP 03811035 A EP03811035 A EP 03811035A EP 1563253 A2 EP1563253 A2 EP 1563253A2
Authority
EP
European Patent Office
Prior art keywords
liquid
spirit
level
level vial
liquids
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Withdrawn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
EP03811035A
Other languages
German (de)
English (en)
Inventor
Joel Lang
Assif Stoffman
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.)
Coloured Level Ltd
Original Assignee
Coloured Level 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
Priority claimed from US10/354,167 external-priority patent/US20040088873A1/en
Application filed by Coloured Level Ltd filed Critical Coloured Level Ltd
Publication of EP1563253A2 publication Critical patent/EP1563253A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • G01C9/18—Measuring inclination, e.g. by clinometers, by levels by using liquids
    • G01C9/24—Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble
    • G01C9/26—Details

Definitions

  • the present invention relates to a device for use in determining whether surfaces are level. More specifically, the present invention relates to a spirit-level vial containing a liquid drop or globule suspended within a second liquid medium.
  • spirit-levels also sometimes known as bubble levels
  • other related leveling devices such as clinometers
  • the spirit-level consists of a rigid-walled, transparent vial or capsule partially filled with a liquid, into which is entrapped a bubble.
  • suitable markings placed either on the capsule itself or on a base member supporting said capsule, the user is able to determine when the device is placed in a level orientation in relation to a desired plane.
  • the aim of the present invention is to provide a spirit-level vial having significantly improved readability.
  • a further aim of the present invention is to provide an improved spirit-level vial in which the increased visual contrast between the vial liquid and the bubble suspended therein is obtained by altering the structure and properties of said bubble.
  • the present invention is primarily directed to a spirit- level vial comprising a transparent vessel containing a globule of a first liquid suspended in a medium comprising a second liquid, wherein said transparent vessel is essentially completely filled by said medium, and wherein said globule is capable of moving freely through said medium in response to changes in the spatial orientation of said transparent vessel.
  • the term "globule” is conventionally understood to refer to a small spherical figure such as a small ball, orb or globe, for the purposes of the present invention, the globule that is suspended within the second liquid medium may also be present in other, related, geometrical forms that are not perfectly spherical, such as an oblate sphere, an elongated sphere or a tear-drop shape.
  • the term is also used in its present context to indicate that the volume of said "globule" is very small in relation to the volume of the second liquid medium, in which said globule is suspended.
  • a globule of a first liquid suspended in a medium comprising a second liquid is to be understood in the sense that the mutual immiscibility of the two liquids is such that the globule constitutes a distinct phase within the second liquid, there being no substantial change in the volume, mass or shape of said globule over a time frame corresponding to the usual (or desired) working lifespan of the spirit-level vial disclosed herein.
  • the first solvent constituting the glouble and the second solvent constituting the medium have distinctly different densities, which densities are designated pi and p 2 , respectively, such that either pi is greater than p 2 , or p 2 is greater than pi.
  • - p 2 ⁇ ⁇ O ⁇ g/cc and more preferably,
  • the transparent vessel of the present invention may be constructed of any suitable material of sufficient transparency or translucency that is compatible with the first and second liquids that are to be contained therewithin, as will be discussed at greater length hereinbelow. It is to be noted that the term "transparent" in this context is to be understood as including within its scope both fully transparent vessels, as well as translucent vessels, whose degree of transparency is sufficient to permit convenient use of the spirit-level vial of the invention. Said transparent vessel may also be formed into any convenient shape that is compatible with the intended function of the spirit-level vial, including tube-like, hemispherical, capsular, and the like.
  • the transparent material is selected such that the first liquid constituing the globule, when brought into contact with said transparent material, is repelled therefrom, that is, said first liquid is not attracted by said transparent material, thus allowing the preservation of said first liquid in its globular form.
  • Particularly preferred materials having this property are polypropylene or its derivative, polymethylpentene .
  • the transparent vessel is made of optically clear polycarbonate or glass, wherein the internal walls of the vessel may be appropriately coated, if desired, for example, with a thin layer of teflon ( or fluor-based polymer).
  • the first and second liquids used to manufacture the spirit-level of the present invention may be any suitable liquids or mixtures of liquids that possess the physical properties described hereinabove.
  • aqueous liquid refers to a liquid which is either water alone or water to which has been added one or more water-miscible liquids and/or into which has been dissolved one or more water-soluble solutes.
  • organic liquid refers to any carbon-containing substance which is in the liquid state in the relevant temperature range, that is, in the range of temperatures in which the vessel according to the invention is intended for use, or to mixtures of such substances .
  • organic liquid refers to silicon oils or silicon fluids or ionic liquids.
  • a spirit-level vial comprising a transparent vessel containing a globule of a first liquid suspended in a medium comprising a second liquid, wherein the first liquid is an aqueous liquid and the second liquid is either an organic liquid or inorganic liquid, and wherein p 2 is greater than pi.
  • p 2 is greater than 1.0 g/cc, and more preferably, p 2 is greater than 1.1 g/cc.
  • the aqueous liquid comprises a mixture of water and water-miscible lower alcohol (Ci ⁇ C alcohol) , which is preferably methanol or ethanol . More preferably, the aqueous liquid is mixture comprising (by weight) 80 to 90% water and 10 to 20% methanol. It has been found that in the case wherein the first liquid constituing the globule is an aqueous liquid, then the second liquid, having a value of p 2 that is greater than 1.0 g/cc, and more preferably, greater than 1.1 g/cc, is preferably a halogenated aliphatic or alicyclic compound, or a mixture of such compounds.
  • the second liquid having a value of p 2 that is greater than 1.0 g/cc, and more preferably, greater than 1.1 g/cc, is preferably a halogenated aliphatic or alicyclic compound, or a mixture of such compounds.
  • halogenated is used herein to refer to substances in which one or more halogen atoms are bonded to carbon atoms, wherein said halogen atoms are either fluorine, chlorine, bromine or iodine, or combinations thereof.
  • the organohalogen compound is selected from the group consisting of halogenated Ci-Cio straight or branched alkanes, halogenated C 3 -C ⁇ o cycloalkanes, halogenated straight or branched C 2 -C ⁇ o alkenes, halogenated C3-C10 cycloalkenes, halogenated C 2 -C ⁇ 0 straight or branched alkynes or mixtures thereof.
  • halogenated C3-C1 0 cycloalkanes encompasses also bicyclic compounds containing two fused rings . It has been found that particularly preferred organohalogen liquids are perfluorinated compounds, which have typical densities above 1.6 g/cc, such as those produced by 3M (FluorinertTM) or Flurochem Ltd (UK) . It is to be noted that the abovementioned halogenated compounds that may be used in the present invention may be optionally further substituted with non-halogen substituents .
  • the first liquid is either an organic liquid or inorganic liquid and the second liquid is an aqueous liquid, wherein pi is less than 1.0 g/cc, and more preferably, pi is less than 0.9 g/cc.
  • the first liquid constituing the globule is an organic liquid and the second liquid is an aqueous liquid
  • the first liquid, wherein Pi is less than 1.0 g/cc, and more preferably, pi is less than 0.9 g/cc is preferably selected from the group consisting of C 5 -C IB straight or branched alkanes, C5-C10 cycloalkanes, straight or branched C5-C10 alkenes, C5-C 1 0 cycloalkenes and C 5 -C 10 straight or branched alkynes, or a mixture thereof.
  • Aromatic hydrocarbons having suitable densities may also be used according to the this embodiment of the invention.
  • the first liquid constituing the globule is an oil, or a mixture of oils .
  • both the first and second liquids are mutually immiscible organic liquids, wherein either pi is less than p 2 , or vice versa.
  • first and second liquids may be strongly colored. In the event that only one of said liquids is strongly colored, the other may be essentially colorless. In the event that both of said liquids are strongly colored, each of said liquids is of a different, mutually-contrasting color. In one preferred embodiment of the invention, the first liquid is colored and the second liquid essentially colorless.
  • the first liquid is a colored aqueous liquid and the second liquid is an essentially colorless organic liquid, wherein said organic liquid has a higher density than said aqueous liquid.
  • the present invention is also directed to a spirit-level vial as defined hereinabove that further comprises visible calibrated markings on one or more surfaces of the transparent vessel.
  • calibrated markings is used herein to indicate that the positions of said markings on the transparent vessel have been either calculated or experimentally determined to be the positions corresponding to the rest positions occupied by the imaginary center point of the liquid globule when one of the axes of said vessel is tilted at certain, defined angular orientations of said vessel in relation to the horizontal plane.
  • the spirit-level vial comprises only one calibrated marking, wherein said marking corresponds to the rest position of the imaginary center point of the liquid globule when one of the axes of the vessel is orientated in the horizontal plane.
  • the spirit-level vial comprises a plurality of calibrated markings, each of which corresponds to a pre-determined angular orientation of one of the axes of the transparent vessel in relation to the horizontal plane.
  • the present invention also provides a spirit-level comprising: a) one or more spirit-level vials as defined hereinabove and described in more detail hereinbelow; b) a base element upon which said one or more spirit-level vials are mounted; and c) one or more calibrated markings, wherein said calibrated markings are present on the surface of the transparent vessel of each of said one or more spirit-level vials and/or the surface of said base element adjacent to said transparent vessel.
  • the base element used to construct the abovementioned spirit-level may be constructed of any suitable material including wood, synthetic polymers, aluminum and other metals and alloys.
  • the spirit-level vials may be attached to said base element by any convenient method known to the skilled artisan, including gluing, heat welding and affixing with straps or bands that are screwed, welded or riveted to said base element.
  • spirit-level as used throughout this document is used in its conventional meaning to refer to a suitable device for determining whether a surface upon which said device rests is level.
  • spirit-level vial is used to refer to the liquid-containing vial or capsule that forms part of said "spirit-level”.
  • spirit- levels and “spirit-level vials” of the present invention are not limited to devices containing “spirit”, (for example, alcohols or alcohol mixtures such as used in most earlier devices that are described by this term) , these terms are retained for reasons of convention and convenience of description, and are to be understood as being interchangeable with the terms “level-determining device” and "level-determining device vials”.
  • the present invention provides a method for producing a spirit-level vial, wherein said vial comprises a transparent vessel containing a globule of a first liquid suspended in a medium comprising a second liquid, wherein said first and second liquids have distinctly different densities, said method comprising introducing into said transparent vessel a suitable quantity of the high-density liquid, immersing the partially filled vessel in the low-density liquid, such that said low-density liquid fills the empty volume of said vessel, and closing said vessel.
  • the conventional spirit-level vials of the prior art are constructed such that they contain an air bubble suspended in a liquid medium.
  • said bubble is less dense than said medium, and as a result has a tendency to move towards the upper end of the vial when it is tilted away from the horizontal plane.
  • this may be considered to be the conventional mode of operation for spirit-level vials.
  • the vials of the present invention may also be arranged such that they operate in the conventional mode, by means of using a first liquid (i.e., the liquid globule) that is less dense than the second liquid medium in which it is suspended.
  • the spirit-level vial of the present invention may be so arranged as to operate in reverse mode, such that the liquid globule has a tendency to move towards the lower end of the vial when said vial is tilted away from the horizontal plane. It is to be emphasized that the present invention encompasses spirit-level vials of both operating modes within its scope.
  • a key feature of the design of the present invention is that the first liquid and the second liquid (as defined hereinabove) be mutually immiscible, in order to retain the unique two-phase globule-medium liquid composition. As mentioned hereinabove, this may be achieved by using a combination of either two immiscible organic liquids, or a combination of an organic liquid and an aqueous liquid, or a combination of an inorganic liquid and an aqueous liquid.
  • spirit-level vials according to embodiments A-G may be produced : Table Ha
  • Perfluorinated compounds 3MTM FluorinertTM liquids; perf luorodecaline or perfluoromethylcyclohexane manufactured by Fluorochem Ltd. (UK) .
  • polyphenyl ethers manufactured by Santovac under the names Santovac 5 polyphenyl ether, OS-124 polyphenyl ether and OS-138 polyphenyl ether
  • Water-immiscible organic liquids (density lower than 1 g/cc) : Oils (soya oil, cannola oil, parrafin oil)
  • Water-miscible organic liquids (density lower than 1 g/cc) Lower (C ⁇ -C 4 ) alcohols, such as methanol and ethanol
  • Water-miscible organic liquids (density greater than 1 g/cc) Polyols (glycols, such as ethylene glycol)
  • Suitable inorganic liquids polydimethylsiloxanes derivatives (Aldrich)
  • suitable inorganic liquids polydimethylsiloxanes derivatives (Aldrich)
  • dyes and other colored substances may be added to the aqueous liquids, the organic liquids, or both.
  • Water-based food dyes have been found to be particularly suitable in this regard.
  • methanol may also be added thereto in varying proportions. For example, it has been found that addition of methanol to water to a final concentration (by weight) of 5% leads to a reduction in the freezing point of the aqueous liquid by 3°C. Methanol concentrations of 20% (w/w) and 30% (w/w) were found to reduce the freezing point by 15°C and 2 ⁇ °C, respectively. Thus different amounts of methanol may be added to the aqueous liquid in accordance with the desired working temperature range of the spirit-level vial.
  • a variety of other additives may also be added to one or both of the first and second liquids, in order to improve the efficiency, accuracy and reliability of the movement of the globule through the liquid medium, in response to changes in spatial orientation of the vial.
  • these additives may be used to increase the speed of movement of the globule through the second fluid medium, on tilting of the vial.
  • Such materials may be low viscosity organic materials such as petroleum ether or THF.
  • These additives may also be lubricating materials, anti-foam additives and viscosity-reducing agents.
  • appropriately-soluble salts may be added to the first liquid and/or the second liquid, in order to change the densities of one or both of said liquids, and to change the degree of immiscibility therebetween.
  • said organic liquid may be mixed with low viscosity organic liquids, such as, for example, heptane, hexane, n-octane, benzene and acetone, provided, of course, that the denisty of the resultant mixture is greater than pi, in order to increase the velocity of the motion of the aqueous globule within the organic mixture.
  • Visibility-enhancing particles may be added to one or both of the first or second liquids in order to improve contrast between the globule and medium, and hence to facilitate reading of the spirit-level vial.
  • Many different types of visibility-enhancing particles may be used in conjunction with the present invention, including: reflective hydrophobic polymer flakes or spheres, fluorescent particles (e.g., fluoroscein) , and phosphorescent particles .
  • the transparent vessel of the present invention includes Perspex, Polycarbonate, glass, polyethylene, polypropylene, polyestertera-phthalate (non-blown) and polyesterteraphthalate (blown) . While all of these substances have been shown to have varying degrees of suitability for use in working the present invention, polypropylene is a particularly preferred material.
  • a particularly preferred transparent polypropylene that may be used for constructing the transparent vessel of the present invention is QT-73, which is manufactured by Carmel Olifenes Ltd., Haifa, Israel.
  • a further example is polymethylpentene (PMP) , a modified polypropylene.
  • the transparent vessel is made of glass, wherein the internal walls of said vessel are appropriately coated, for example, with a thin semi-transparent layer of teflon.
  • the spirit-level vial according to the present invention may be readily produced by introducing into a transparent vessel a suitable quantity of the high-density liquid, immersing the partially filled vessel in the low-density liquid, such that said low-density liquid fills the empty volume of said vessel, and closing (e.g., crimping) the vessel, thus preventing the entry of air into the vessel.
  • the volume of the glouble is about 6—20%of the total volume of the vessel.
  • a spirit-level vial according to embodiment A (as defined in Table la above) is intended, wherein a glouble of an aqueous liquid is suspended in an organic liquid having a density greater than 1.0 g/cc, the vial is prepared by introducing the high-density organic liquid into the transparent vessel in a quantity corresponsing to about 80 to 94 % of the volume of said vessel, immersing the partially filled vessel in the aqueous liquid, such that said aqueous liquid fills the empty volume of said vessel, and closing (e.g., crimping) the vessel.
  • the transparent vessel must first be filled (partially) with the high-density liquid.
  • the spirit-level vial may be produced by introducing into the transparent vessel the selected liquids in any desired order, following which the filled vessel is exposed to vacuum (typically in the range of 20 to 300 mmHg) , in order to remove air present therein.
  • Transparent vessel made of : optically clear polymethylpentene
  • Globule Aqueous liquid (a mixture of water and methanol)
  • a Ice crimp cap type vial with a standard 11mm fitting cap made of optically clear polymethylpentene (PMP X-22, manufactured by Mitsui Petrochemical Co., Tokyo, Japan) was used as the transparent vessel.
  • the crimp cap was fitted with a teflon separator in order to provide complete compatibility with the organic solution.
  • the vial was provided with an internal curvature radius of 10 inch.
  • the vial was filled with 0.9 cc 1, 2, 3-trichloropropane (supplied by Sigma Chemicals Inc., Missouri)).
  • the vial was then immersed upright beneath a colored solution comprising 10% methanol v/v%, a few grains of a water-soluble food dye (supplied by Rudo, Israel) and 90% water.
  • the water/methanol/dye solution filled the remaining 0.1 cc empty volume of the vial and while the vial was submerged beneath the said solution, it was crimped shut with a suitable crimper. This process ensures that no air may leak into the two liquid phases and that a known quantity of colored water/methanol solution is introduced into the vial. Suitable markings to state the level state of the water/methanol bubble were etched on the external surface of the vial.
  • Example 2 A spirit-level vial containing an aqueous globule suspended in an organic medium (Embodiment A of Table la)
  • Transparent vessel made of: optically clear glass
  • Globule Aqueous liquid (a mixture of water and methanol)
  • lcc crimp cap type vial with a standard 11mm fitting cap made of optically clear glass was used as the transparent vessel.
  • the glass vial was provided with an internal curvature radius of 10 inch radius.
  • the crimp cap was fitted with a teflon separator in order to provide complete compatibility with the organic liquid (The vial was coated internally by a teflon solution EGC 1700 manufactured by 3M and then dried and placed in 70°C oven for 20 minutes) .
  • the vial was filled with 0.9 cc 1, 2, 3-trichloropropane (supplied by Sigma) .
  • the vial was then immersed upright beneath a colored solution comprising 10% methanol v/v%, a few grains of a water-soluble food dye (supplied by Rudo, Israel) and 90% water.
  • the water/methanol/dye solution filled the remaining 0.1 cc empty volume of the vial and while the vial was submerged beneath the said solution, it was crimped shut with a suitable crimper. Suitable markings to state the level state of the water/methanol bubble were etched on the external surface of the vial.
  • Example 3 A spirit-level vial containing an aqueous globule suspended in an organic medium (Embodiment A of Table la)
  • Transparent vessel made of: optically clear polycarbonate
  • Globule aqueous liquid (a mixture of water and methanol)
  • a lcc crimp cap type vial with a standard 11mm fitting cap made of optically clear polycarbonate was used as the transparent vessel.
  • the crimp cap was fitted with a teflon separator in order to provide complete compatibility with the organic solution.
  • the vial was provided with an internal curvature radius of 10 inch radius.
  • the vial was filled with 0.9 cc polyphenyl ether (santovac 5, manufactured by Santovac) .
  • the vial was then immersed upright beneath a colored solution comprising 10% methanol, a few grains of a water-soluble food dye (supplied by Rudo, Israel) and 90% water.
  • the water/methanol/dye solution filled the remaining 0.1 cc empty volume of the vial and while the vial was submerged beneath the said solution, it was crimped shut with a suitable crimper. Suitable markings to state the level state of the water/methanol bubble were etched on the external surface of the vial.
  • Example 4 A spirit-level vial containing an aqueous globule suspended in an organic medium (Embodiment A of Table la)
  • Transparent vessel made of: optically clear polycarbobnate
  • Globule Aqueous liquid (a mixture of water and methanol)
  • a Ice crimp cap type vial with a standard 11mm fitting cap made of optically clear polycarbonate was used as the transparent vessel.
  • the crimp cap was fitted with a teflon separator in order to provide complete compatibility with the organic solution.
  • the vial was provided with an internal curvature radius of 10 inch.
  • the vial was filled with FluroinertTM liquid FC-70 manufactured by 3M. The vial was then immersed upright beneath a colored solution comprising 10% methanol v/v%, a few grains of a water- soluble food dye (supplied by Rudo, Israel) and 90% water.
  • Example 5 A spirit-level vial containing an organic globule suspended in an aqueous medium (Embodiment B of Table la)
  • Transparent vessel made of: optically clear glass Medium: Aqueous liquid (a mixture of water and methanol) Globule: Organic liquid (alkane)
  • a lcc crimp cap type vial with a standard 11mm fitting cap made of optically clear glass was used as the transparent vessel.
  • the glass vial was provided with an internal curvature radius of 10 inch radius.
  • the crimp cap was fitted with a teflon separator in order to provide complete compatibility with the organic solution.
  • the vial was filled with 0.9 cc 80% (v/v%) water and 20% (v/v%) methanol solution.
  • the vial was then immersed upright beneath hexadecane (Fluka) .
  • the alkane filled the remaining 0.1 cc empty volume of the vial and while the vial was submerged beneath the said oil, it was crimped shut with a suitable crimper. Suitable markings to state the level state of the organic bubble were etched on the external surface of the vial.
  • Example 6 A spirit-level vial containing an organic globule suspended in an aqueous medium (Embodiment B of Table la)
  • Transparent vessel made of: optically clear glass
  • Medium Aqueous liquid (water + surfactant)
  • Globule Organic liquid (alkane)
  • a Ice crimp cap type vial with a standard 11mm fitting cap made of optically clear glass was used as the transparent vessel.
  • the glass vial was provided with an internal curvature of 10 inch radius.
  • the crimp cap was fitted with a teflon separator in order to provide complete compatibility with the organic solution.
  • the vial was filled with 0.9 cc 0.3% Triton-X (manufactured by 3M) water solution. The vial was then immersed upright beneath normal pentadecane (Merck) and a few drops of dichlorofluorescein.
  • the fluorescent organic liquid filled the remaining 0.1 cc empty volume of the vial and while the vial was submerged beneath the said oil, it was crimped shut with a suitable crimper. Suitable markings to state the level state of the organic bubble were etched on the external surface of the vial .
  • Example 7 A spirit-level vial containing an aqueous globule suspended in an organic medium (Embodiment A of Table la)
  • Transparent vessel made of: optically clear polymethylpentene Medium: organic liquid (1,5 dibromopentane) Globule: water
  • a lcc crimp cap type vial with a standard 11mm fitting cap made of optically clear polymethylpentene (PMP X-22, manufactured by Mitsui Petrochemical Co., Tokyo, Japan) was used as the transparent vessel.
  • the crimp cap was fitted with a teflon separator in order to provide complete compatibility with the organic solution.
  • the vial was provided with an internal curvature radius of 10 inch.
  • the vial was filled with 0.9 cc 1,5 dibromopentane (supplied by Sigma) .
  • the vial was then immersed upright beneath a colored solution comprising a few grains of a water- soluble food dye (supplied by Rudo, Israel) and water.
  • the water/dye solution filled the remaining 0.1 cc empty volume of the vial and while the vial was submerged beneath the said solution, it was crimped shut with a suitable crimper. Suitable markings to state the level state of the aqueous bubble were etched on the external surface of the vial.
  • Example 8 A spirit-level vial containing an aqueous globule suspended in an organic medium (Embodiment A of Table la)
  • Transparent vessel made of: optically clear polymethylpentene Medium: Organic liquid (A mixture of halogenated and non-halogenated liquids) Globule: water
  • a lcc crimp cap type vial with a standard 11mm fitting cap made of optically clear polymethylpentene (PMP X-22, manufactured by Mitsui Petrochemical Co., Tokyo, Japan) was used as the transparent vessel.
  • the crimp cap was fitted with a teflon separator in order to provide complete compatibility with the organic solution.
  • the vial was provided with an internal curvature radius of 10 inch radius.
  • the vial was filled with 0.9 cc solution of a blend of santovac OS-138 and fluoroinertTM FC-70 (50%: 50% v/v) .
  • the vial was then immersed upright beneath a colored solution comprising a few grains of a water-soluble food dye (supplied by Rudo, Israel) and water.
  • the water/dye solution filled the remaining 0.1 cc empty volume of the vial and while the vial was submerged beneath the said solution, it was crimped shut with a suitable crimper. Suitable markings to state the level state of the aqueous bubble were etched on the external surface of the vial.
  • Example 9 A spirit-level vial containing an organic globule suspended in an aqueous medium (Embodiment F of Table lb)
  • Transparent vessel made of: optically clear polymethylpentene Medium: aqueous liquid (water + methanol) Globule: organic liquid (1, 2, 3-trichloropropane)
  • a lcc crimp cap type vial with a standard 11mm fitting cap made of optically clear polymethylpentene (PMP X-22, manufactured by Mitsui Petrochemical Co., Tokyo, Japan) was used as the transparent vessel.
  • the crimp cap was fitted with a teflon separator in order to provide complete compatibility with the organic solution.
  • the vial was provided with an internal curvature radius of 10 inch.
  • the vial was filled with 0.1 cc 1, 2, 3-trichloropropane (supplied by sigma) .
  • the vial was then immersed upright beneath a colored solution comprising 10% methanol v/v%, a few grains of a water-soluble food dye (supplied by Rudo, Israel) and 90% water.
  • the water/methanol/dye solution filled the remaining 0.9 cc empty volume of the vial and while the vial was submerged beneath the said solution, it was crimped shut with a suitable crimper. Suitable markings to state the level state of the organic bubble were etched on the external surface of the vial.
  • the spirit-level vial according to the present invention may be also produced by introducing into a transparent vessel suitable quantities of the first and second liquids, sealing the vessel by means of a suitable teflon film to prevent air entry, and subsequently closing (e.g., crimping) the vessel.

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  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
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  • Medical Preparation Storing Or Oral Administration Devices (AREA)
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Abstract

L'invention concerne un tube de niveau à bulle d'air comprenant un contenant transparent contenant une gouttelette d'un premier liquide en suspension dans un milieu comprenant un second liquide. Le contenant transparent est essentiellement et complètement rempli dudit milieu, et ladite gouttelette peut se déplacer librement dans ledit milieu en réaction à des changements d'orientation spatiale du contenant transparent.
EP03811035A 2002-11-12 2003-10-06 Tube de niveau a bulle d'air a fort contraste Withdrawn EP1563253A2 (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US42529702P 2002-11-12 2002-11-12
US425297P 2002-11-12
US10/354,167 US20040088873A1 (en) 2002-11-12 2003-01-30 High contrast spirit-level vial
US354167 2003-01-30
US49513703P 2003-08-15 2003-08-15
US495137P 2003-08-15
PCT/IB2003/004391 WO2004044524A2 (fr) 2002-11-12 2003-10-06 Tube de niveau a bulle d'air a fort contraste

Publications (1)

Publication Number Publication Date
EP1563253A2 true EP1563253A2 (fr) 2005-08-17

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EP03811035A Withdrawn EP1563253A2 (fr) 2002-11-12 2003-10-06 Tube de niveau a bulle d'air a fort contraste

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EP (1) EP1563253A2 (fr)
JP (1) JP2006506656A (fr)
AU (1) AU2003264767A1 (fr)
CA (1) CA2505253A1 (fr)
WO (1) WO2004044524A2 (fr)

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CA2505253A1 (fr) 2004-05-27
WO2004044524A3 (fr) 2004-08-12
JP2006506656A (ja) 2006-02-23
AU2003264767A1 (en) 2004-06-03
WO2004044524A2 (fr) 2004-05-27

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