GB666886A - Improvements in photo electric colorimeters - Google Patents

Improvements in photo electric colorimeters

Info

Publication number
GB666886A
GB666886A GB33601/48A GB3360148A GB666886A GB 666886 A GB666886 A GB 666886A GB 33601/48 A GB33601/48 A GB 33601/48A GB 3360148 A GB3360148 A GB 3360148A GB 666886 A GB666886 A GB 666886A
Authority
GB
United Kingdom
Prior art keywords
cell
photo
pivot
axis
scale
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
GB33601/48A
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.)
AUGUSTE LOUIS MARIE ANTOINE RO
Original Assignee
AUGUSTE LOUIS MARIE ANTOINE RO
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 to DEP28453A priority Critical patent/DE826644C/en
Priority to US668925A priority patent/US2448134A/en
Priority to CH279951D priority patent/CH279951A/en
Application filed by AUGUSTE LOUIS MARIE ANTOINE RO filed Critical AUGUSTE LOUIS MARIE ANTOINE RO
Priority to GB33601/48A priority patent/GB666886A/en
Publication of GB666886A publication Critical patent/GB666886A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C5/00—Pavings made of prefabricated single units
    • E01C5/005—Individual couplings or spacer elements for joining the prefabricated units
    • 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
    • G01N21/251—Colorimeters; Construction thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/501—Colorimeters using spectrally-selective light sources, e.g. LEDs

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Civil Engineering (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Road Paving Structures (AREA)

Abstract

666,886. Photo-electric colorimeters. ROUY A. L. M. A. Dec. 31, 1948, No. 33601/48. Class 40 (iii). In a photo-electric colorimeter, use is made of the whole scale of the instrument by mounting the photo-cell so as to rotate to bring the pointer to full scale deflection with the minimum sample density. As shown, light from a source 1 passes through one of a number of filters 3, 4, 5 mounted in a rotatable holder 2, through the sample in a container 6 and on to a photo-cell 10. This photo-cell is mounted on a pivot 9 and may be turned from the outside of the casing by a knob 16 which acts through worm gearing 11, 12. The axis of the pivot lies in the plane of the sensitive surface and the centre of the photo-cell lies on the axis of the light. In a modification, Fig. 2, the centre of the cell remains aligned with the axis of the light beam but the pivot is shifted. The photo-cell is mounted in a holder 23 and is moved to one side, the distance being indicated on the scale 30. The block 24 carrying the pivot is then brought back an equal distance relative to scale 28. Normally the axis of the pivot will be required to coincide with the edge of the cell. The cell may be pivoted horizontally. The Specification states that the total current output of the cell follows a cosine law with the angular rotation whether a converging, parallel or diverging beam is used.
GB33601/48A 1946-05-10 1948-12-31 Improvements in photo electric colorimeters Expired GB666886A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DEP28453A DE826644C (en) 1946-05-10 Photoelectric colorimeter
US668925A US2448134A (en) 1946-05-10 1946-05-10 Pavement slab connector
CH279951D CH279951A (en) 1946-05-10 1948-12-28 Photoelectric colorimeter.
GB33601/48A GB666886A (en) 1946-05-10 1948-12-31 Improvements in photo electric colorimeters

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US668925A US2448134A (en) 1946-05-10 1946-05-10 Pavement slab connector
GB33601/48A GB666886A (en) 1946-05-10 1948-12-31 Improvements in photo electric colorimeters

Publications (1)

Publication Number Publication Date
GB666886A true GB666886A (en) 1952-02-20

Family

ID=41090239

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33601/48A Expired GB666886A (en) 1946-05-10 1948-12-31 Improvements in photo electric colorimeters

Country Status (4)

Country Link
US (1) US2448134A (en)
CH (1) CH279951A (en)
DE (1) DE826644C (en)
GB (1) GB666886A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3915582A (en) * 1970-01-09 1975-10-28 Klarcrete Ltd Method of repairing concrete roads
US4353666A (en) * 1980-12-08 1982-10-12 Brandley Reinard W Device for transferring loads between adjoining concrete slabs
US4516876A (en) * 1983-01-10 1985-05-14 Wicks Harry O Precast concrete expansion joint for roads and the like
US20050265802A1 (en) * 2004-05-27 2005-12-01 Alltrista Zinc Products, L.P. Environmentally protected reinforcement dowel pins and method of making
US20150098757A1 (en) * 2013-10-07 2015-04-09 Mark Mitchell Playground mats
US9920490B2 (en) * 2016-01-05 2018-03-20 Integrated Roadways, Llc Modular pavement system
US10407838B1 (en) 2017-02-06 2019-09-10 Integrated Roadways, Llc Modular pavement slab
US11230815B2 (en) * 2019-01-08 2022-01-25 Sael, Llc. Dowel basket with non-metallic dowel bars and method of making same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US52162A (en) * 1866-01-23 Improved coupling for shafting
US112972A (en) * 1871-03-21 Improvement in shaft-couplings
US1377418A (en) * 1918-01-21 1921-05-10 Carl A Krogh Rod-coupling
US1811161A (en) * 1929-09-16 1931-06-23 Structural Concrete Units Corp Unit wall construction
US2014826A (en) * 1930-10-02 1935-09-17 Hyland R Johns Road building apparatus
US2181005A (en) * 1935-05-20 1939-11-21 Cal C Chambers Dowel bar structure
US2327231A (en) * 1935-05-20 1943-08-17 James H Jacobson Split dowel bar with bearing and support
US2187912A (en) * 1936-04-13 1940-01-23 Ralph S Peirce Road anchoring means

Also Published As

Publication number Publication date
CH279951A (en) 1951-12-31
US2448134A (en) 1948-08-31
DE826644C (en) 1951-11-29

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