GB1292085A - Devices for the spectrographic analysis of molten metals - Google Patents

Devices for the spectrographic analysis of molten metals

Info

Publication number
GB1292085A
GB1292085A GB51075/70A GB5107570A GB1292085A GB 1292085 A GB1292085 A GB 1292085A GB 51075/70 A GB51075/70 A GB 51075/70A GB 5107570 A GB5107570 A GB 5107570A GB 1292085 A GB1292085 A GB 1292085A
Authority
GB
United Kingdom
Prior art keywords
photo
arc
mirror
spectrograph
gas
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
GB51075/70A
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.)
FR D INSTR DE CONTROLE ET D AN
Original Assignee
FR D INSTR DE CONTROLE ET D AN
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 FR D INSTR DE CONTROLE ET D AN filed Critical FR D INSTR DE CONTROLE ET D AN
Publication of GB1292085A publication Critical patent/GB1292085A/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
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/66—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light electrically excited, e.g. electroluminescence
    • G01N21/69—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light electrically excited, e.g. electroluminescence specially adapted for fluids, e.g. molten metal

Abstract

1292085 Photo-electric control systems SOC FRANCAISE D'INSTRUMENTS DE CONTROLE ET D'ANALYSES 27 Oct 1970 [28 Oct 1969] 51075/70 Heading G1A [Also in Division G2] To ensure that a spectrograph 14 is always viewing the most intense part 8 of an electric arc an intermediate device 10 is provided having an optical system 23-25 including a concave mirror 23 whose position is servocontrolled, the control signal being derived from a photo-cell arrangement (33) Fig. 2 (not shown) responsive to intensity fluctuations in a monitoring beam 42 to position the mirror 23 so that it always focuses the most intense part of the arc on to the spark point 38 of the spectrograph. The photo-cell device comprises two groups of two photo-electric cells disposed in opposite pairs in two perpendicular directions. Each pair of cells controls a pivoting movement of the mirror 23 about one of two orthogonal directions. The device may be evacuated through a tube 16, or transparent gas may be introduced therethrough. Such gas may also be flowed through a tube 11b to maintain an inert atmosphere between the arc and a quartz window 18 of the device. A refrigeration circuit 11a is also provided. An optical fibre bundle extending from the spark point 38 to the entrance slit 40 of the spectrograph may replace the lens 20, in which case a gas tight seal must be provided around the bundle at the aperture 19. Similarly, a tubular light guide within which is contained a transparent gas may conduct radiation from the arc to the entrance aperture of the device. In a further embodiment Fig. 3 (not shown) the mirror 31, lens 32 - which may be of variable focal length - and photo-cell arrangement are contained within a housing (43) attached to the body of the device 10.
GB51075/70A 1969-10-28 1970-10-27 Devices for the spectrographic analysis of molten metals Expired GB1292085A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6936939A FR2063713A5 (en) 1969-10-28 1969-10-28

Publications (1)

Publication Number Publication Date
GB1292085A true GB1292085A (en) 1972-10-11

Family

ID=9042179

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51075/70A Expired GB1292085A (en) 1969-10-28 1970-10-27 Devices for the spectrographic analysis of molten metals

Country Status (4)

Country Link
US (1) US3669546A (en)
DE (1) DE2052669C3 (en)
FR (1) FR2063713A5 (en)
GB (1) GB1292085A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3876306A (en) * 1971-07-30 1975-04-08 Nippon Steel Corp Method of state-differentiating analysis of specified elements in metals and composition adjustment thereof
DE2164098C3 (en) * 1971-12-23 1975-06-19 Kernforschungsanlage Juelich Gmbh, 5170 Juelich Method for determining the burn-up of fuel elements for nuclear reactors
US3815995A (en) * 1972-02-04 1974-06-11 Wisconsin Alumni Res Found Method and apparatus for spark spectroscopy by deriving light from limited portions of the spark discharge
US4395091A (en) * 1980-10-31 1983-07-26 The Perkin-Elmer Corporation Optical coupling device for use with a plasma emission spectrometer
JPS6186636A (en) * 1984-10-05 1986-05-02 Kawasaki Steel Corp Emission spectrochemical analysis method of steel using laser
US4615225A (en) * 1985-03-13 1986-10-07 Allied Corporation In-situ analysis of a liquid conductive material
US4783417A (en) * 1986-02-07 1988-11-08 Aluminum Company Of America System for on-line molten metal analysis
AU588105B2 (en) * 1986-02-07 1989-09-07 Aluminum Company Of America System for on-line molten metal analysis
US4806150A (en) * 1988-01-21 1989-02-21 The United States Department Of Energy Device and technique for in-process sampling and analysis of molten metals and other liquids presenting harsh sampling conditions
DE4114276C2 (en) * 1991-05-02 1996-09-19 Spectro Analytical Instr Gas filled UV spectrometer
US6984398B2 (en) * 2003-04-02 2006-01-10 Arch Chemicals, Inc. Calcium hypochlorite blended tablets
CN101813520B (en) * 2009-12-23 2013-01-09 杭州远方光电信息股份有限公司 Two-dimensional spectrum measuring device

Also Published As

Publication number Publication date
DE2052669B2 (en) 1973-06-14
US3669546A (en) 1972-06-13
FR2063713A5 (en) 1971-07-09
DE2052669A1 (en) 1971-05-13
DE2052669C3 (en) 1974-01-03

Similar Documents

Publication Publication Date Title
GB1292085A (en) Devices for the spectrographic analysis of molten metals
GB1506726A (en) Gas analysers
GB1485428A (en) Fluid analysers
GB1119910A (en) Improvements relating to device comprising electron-optical night telescopes
GB1424388A (en) Blood cell analyzer
US3725702A (en) Infrared gas analyzer
GB1525989A (en) Device for analysing a solution
US4192996A (en) Measurement of oxygen by differential absorption of UV radiation
GB1301252A (en)
US4120592A (en) Multiplex optical analyzer apparatus
US2734418A (en) Spectrometer system with receiver
GB983735A (en) High information density data record and readout device
WO1993016362A1 (en) Chemical species optical analyzer with multiple fiber channels
US3669547A (en) Optical spectrometer with transparent refracting chopper
US3712738A (en) Illuminator system for use in spectrophotometer
GB1331757A (en) Apparatus and method for determining the contents of chemical elements in a solid sample
EP0071645B1 (en) Double beam photometer for measuring fluid samples
GB1237547A (en) Differential spectral absorption analyser
US3348447A (en) Determination of isotopic concentrations
GB1508068A (en) Two-beam photometer with interference filter
JPS58219438A (en) Spectrochemical analysis device using laser light
JPS58219435A (en) Spectrophotometer with two luminous fluxes
KR870003370A (en) Modified engineering turret with laser source
US3002417A (en) Automatic target finder and tracker for theodolites and the like
GB2132049A (en) Aligning two radiation sensors

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee