Modernized cryostat for the VNIIM DIN-3 interference dilatometer

1969 ◽  
Vol 12 (12) ◽  
pp. 1793-1794
Author(s):  
A. N. Amatuni ◽  
E. B. Shevchenko
Keyword(s):  
Interference Dilatometer

scholarly journals VIII. A compensated interference dilatometer

1898 ◽  
Vol 191 ◽  
pp. 313-364 ◽  
Keyword(s):  
Thermal Expansion ◽  
Accurate Determination ◽  
Interference Method ◽  
Interference Dilatometer ◽  
Small Crystal ◽  
Classical Work ◽  
New Instrument ◽  
The Difference

The instrument now described is a form of Fizeau interference dilatometer, in which the sensitiveness of the interference method is so largely increased as to render it unnecessary to employ a plate or block of the solid, whose expansion is to be measured, of greater thickness than 5 millimetres. The author has been led to adopt it for the accurate determination of the thermal expansion of the crystals of artificial chemical preparations, which it is frequently impossible to obtain sufficiently large, and at the same time homogeneous, to furnish plates a centimetre thick, as demanded by the forms of apparatus hitherto described. The exquisite method devised by Fizeau (‘Compt. Rend.,’ vol. 58, p. 923, and vol. 62, p. 1133; ‘Ann. Chim. Phys.,’ [4], vol. 2, p. 143, and [4], vol. 8, p. 335) depends essentially upon the determination of the difference of expansion, which accompanies rise of temperature, between the screws of a small metallic tripod and the object under investigation which is supported by it. In the form of apparatus now described the expansion of these screws is compensated and eliminated, thus rendering the total expansion of the object available for measurement. Hence, it is possible to obtain a result with a small crystal of as satisfactorily accurate a character as was formerly only to be obtained with a much larger crystal. Besides the introduction of this compensating principle, the new instrument combines, in the author’s opinion, the best features of the several forms of Fizeau dilatometer previously described; at the same time it is essentially different from any one of these previous forms, and includes many details of a novel character. The author is largely indebted to the Memoirs of Benoit (‘Trav. et Mémoires du Bureau Int. des Poids et Mesures,’ vol. 1, 1881, p. 1, and vol. 6, 1888, p. 106), concerning the Fizeau apparatus belonging to the Bureau International des Poids et Mesures, Paris, and the classical work which he has accomplished by the use of it ; and to the later one of Pulfrich (‘Zeitschrift fur Instrumentenkunde,’ 1893, p. 365) concerning an improved form of apparatus embodying the important modifications introduced into the method by Abbe in the year 1884 and described by Weidmann in 1889 (‘Wiedemann’s Annalen,’ vol. 38, p. 453).

scholarly journals The thermal expansion of pure nickel and cobalt

1900 ◽  
Vol 65 (413-422) ◽  
pp. 161-162 ◽  
Keyword(s):  
Thermal Expansion ◽  
Pure Nickel ◽  
Interference Dilatometer

The author has carried out a series of re-determinations of the co­ efficients of thermal expansion of these two metals with the aid of the interference dilatometer described in a former communication to the Society.

High-accuracy interference dilatometer type DIVA-1

1979 ◽  
Vol 22 (12) ◽  
pp. 1486-1488
Author(s):  
N. P. Posnov ◽  
V. M. Gurevich ◽  
A. E. Demenev
Keyword(s):  
High Accuracy ◽  
Interference Dilatometer

Interference dilatometer

1963 ◽  
Vol 6 (8) ◽  
pp. 655-655
Author(s):  
A. N. Koroleva
Keyword(s):  
Interference Dilatometer

Optical interference dilatometer

2005 ◽  
Vol 16 (10) ◽  
pp. 2114-2120 ◽  
Author(s):  
Chwei Goong Tseng ◽  
Yuan Show Jiang
Keyword(s):  
Optical Interference ◽  
Interference Dilatometer

An interference dilatometer for temperature range 20?1100�C

1975 ◽  
Vol 18 (2) ◽  
pp. 267-270 ◽  
Author(s):  
A. N. Amatuni ◽  
T. I. Malyutina
Keyword(s):  
Interference Dilatometer ◽  
Temperature Range

scholarly journals A wave-length comparator for standards of length

1909 ◽  
Vol 83 (559) ◽  
pp. 79-80
Keyword(s):  
Royal Society ◽  
Wave Length ◽  
Interference Dilatometer ◽  
Specific Object ◽  
Constant Deviation

Two and a-half years ago the author was requested by the Standards Department of the Board of Trade to devise and superintend the construction of a new comparator, for comparing standards of length ─the Imperial Standard Yard, for instance, with official or other copies ─in terms of wave-lengths of light. The instrument now described is the result. Besides performing its functions as a wave-length comparator, and being the first instrument specifically constructed as such, it is also the most perfect instrument yet devised for measurement in wave-length in general. It is described to the Royal Society by permission of the President of the Board of Trade. The principle of the instrument id that of the author's interferometer, described to the Society in 1898 in connection with an interference dilatometer, and again as improved in 1904 in connection with the author's elasmometer or interference elasticity apparatus. The interferometer, which is totally different from that of Michelson or that of Fabry and Perot, is adapted as regards details in a special manner for the specific object in view, but with the exception that a Hilger constant deviation prism is employed instead of a train of two spectroscope prisms, its principle is preserved intact.

The thermal deformation of the crystallised normal sulphates of potassium, rubidium, and cæsium

1899 ◽  
Vol 64 (402-411) ◽  
pp. 350-353
Keyword(s):  
Thermal Expansion ◽  
Thermal Deformation ◽  
Interference Dilatometer ◽  
Orthorhombic Crystals

In this memoir are communicated the results of sixty-four determinations of the thermal expansion of the orthorhombic crystals of the normal sulphates of potassium, rubidium, and cæsium, carried out for the three axial directions of the crystals with the aid of the compensated interference dilatometer previously described by the author. The employment of the compensated method has proved highly successful, extremely concordant results being afforded with crystals not necessarily more than 5 mm. thick. The twenty-nine different parallel-faced crystal-blocks employed varied in thickness from 4·8 to 10·7 mm. The main conclusions from the work are given in the following summary.

A compensated interference dilatometer

1898 ◽  
Vol 63 (389-400) ◽  
pp. 208-211 ◽  
Keyword(s):  
Interference Dilatometer ◽  
Homogeneous Block

The author describes a form of Fizeau interference dilatometer which he considers combines the best features of the apparatus described by Benoit, and belonging to the Bureau International Poids et Mesures, in Paris, and that described by Pulfrich’ constructed according to the modifications introduced into the method by Abbe. Moreover, besides other improvements, a new principle that of compensation for the expansion of the screws of the Fizeau tripod which supports the object, is introduced, which enhances the sensitiveness of the method so highly as to render it applicable to the determination of the expansion of crystals in general, including those of chemical preparations. Hitherto the application of the Fizeau method has been confined to such crystals as could be obtained large enough to furnish a homogeneous block at least a centimeter thick.

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