GB497458A - Improved apparatus for testing the colours of liquids - Google Patents

Improved apparatus for testing the colours of liquids

Info

Publication number
GB497458A
GB497458A GB25441/37A GB2544137A GB497458A GB 497458 A GB497458 A GB 497458A GB 25441/37 A GB25441/37 A GB 25441/37A GB 2544137 A GB2544137 A GB 2544137A GB 497458 A GB497458 A GB 497458A
Authority
GB
United Kingdom
Prior art keywords
colour
wedge
testing
frame
liquid
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
GB25441/37A
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.)
Hellige & Co F GmbH
Original Assignee
Hellige & Co F GmbH
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 Hellige & Co F GmbH filed Critical Hellige & Co F GmbH
Publication of GB497458A publication Critical patent/GB497458A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/29—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection
    • G01N21/293—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection with colour charts, graduated scales or turrets

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Abstract

497,458. Testing colours of liquids. HELLIGE & CO., GES., F. Sept. 20, 1937, No. 25441. Convention date, Oct. 2, 1936. [Class 97 (i)] Apparatus for testing the colour of liquids, more particularly for the estimation of pH values, comprises a solid colour wedge or strip L as of coloured gelatine enclosed between a transparent front glass plate and a translucent rear glass plate mounted in upright position on a frame B having vertical guideways E in which is adjustable, e.g. with frictional grip, a slide F provided with a vessel O for the liquid to be tested, and apertures H<2>, H<3> for viewing respectively the liquid against the plain background N, and the colour wedge L. A third aperture H<1> may be provided for viewing a scale M, e.g. of pH values, formed, e.g. photographically on the inner surface of the front glass plate. For testing pH values, the wedge L usually consists of a scale, gradually merging from one colour into another. The glass plates may be mounted in a frame I detachably held by a spring in the frame B so as to be replaceable by a frame enclosing a different colour wedge. A vessel containing a colour compensation liquid may be inserted in an opening G<2> in the slide F. Reference is made to comparison devices employing a liquid coloured wedge or graduated colour standards arranged on a rotatable disc. The Specification as open to inspection under Sect. 91 describes also a colour wedge L formed by superimposing two oppositely directed wedges each of a predetermined colour, e.g. one violet and the other yellow. This subjectmatter does not appear in the Specification as accepted.
GB25441/37A 1936-10-02 1937-09-20 Improved apparatus for testing the colours of liquids Expired GB497458A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE497458X 1936-10-02

Publications (1)

Publication Number Publication Date
GB497458A true GB497458A (en) 1938-12-20

Family

ID=6545175

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25441/37A Expired GB497458A (en) 1936-10-02 1937-09-20 Improved apparatus for testing the colours of liquids

Country Status (2)

Country Link
FR (1) FR824554A (en)
GB (1) GB497458A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182458A (en) * 1985-09-18 1987-05-13 Sarah Crutch Comparing visible information from a sample to a reference

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5057275A (en) * 1988-09-16 1991-10-15 Exocell, Inc. Analytic reader device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182458A (en) * 1985-09-18 1987-05-13 Sarah Crutch Comparing visible information from a sample to a reference

Also Published As

Publication number Publication date
FR824554A (en) 1938-02-11

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