Research into the lack of parallelism in long end gauges

1965 ◽  
Vol 8 (6) ◽  
pp. 493-495
Author(s):  
V. P. Golubkova
Keyword(s):  
End Gauges

Increasing the accuracy of measurements using end gauges

1994 ◽  
Vol 37 (10) ◽  
pp. 1117-1120
Author(s):  
G. B. Kainer ◽  
E. �. Sil'vestrova
Keyword(s):  
Accuracy Of Measurements ◽  
End Gauges

MEASUREMENT OF LONG END GAUGES BY COMPARISON WITH PRECISION LINE STANDARDS

1945 ◽  
Vol 23f (3) ◽  
pp. 185-191
Author(s):  
Constance E. Arregger
Keyword(s):  
Experimental Technique ◽  
Reference Line ◽  
End Gauges ◽  
Line Standard

The operation of comparing an end standard of length with a reference line standard is carried out by a method which is simple in principle, but which demands careful experimental technique. Textbooks give little beyond an outline of the principle, and in view of the importance of end gauges in industry, it has been considered worth while to record a description of an actual comparison. In the operation described two Johannson-type gauges, of 20 in. and 10 in. length, were compared with line standards which themselves had been compared directly with the legal Canadian standard metre.

Lappability of end gauges and mechanical properties of their near-surface layers

1986 ◽  
Vol 29 (7) ◽  
pp. 621-624
Author(s):  
G. B. Kainer ◽  
V. M. Kuchumova ◽  
L. A. Kochanova ◽  
V. I. Savenko ◽  
N. P. Fedoseeva ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Layers ◽  
Near Surface ◽  
End Gauges

AN IMPROVED INTERFEROMETER FOR DETERMINING PARALLELISM ERRORS IN LONG END-GAUGES

1947 ◽  
Vol 25f (3) ◽  
pp. 242-259
Author(s):  
L. Graham Turnbull
Keyword(s):  
Mechanical Design ◽  
National Physical Laboratory ◽  
Physical Laboratory ◽  
Specialized Technique ◽  
End Gauges ◽  
The Difference

This paper describes an interferometer designed for the determination of the parallelism of the working faces of end-gauges up to 24 in. in length. An instrument for this purpose, but which required somewhat highly specialized technique in the course of its construction, had been previously designed by the National Physical Laboratory. Using optical principles the same as those of the British instrument, another of an entirely new mechanical design has been constructed by the National Research Laboratories, Ottawa. This new interferometer incorporates kinematic principles and a number of interesting features to permit easy adjustment and operation to the very fine limits necessary. By the addition of a sensitive level vial to this instrument, the difference in length of nominally equal end-gauges can be determined to an accuracy of 1 or 2 × 10−6 in.

scholarly journals The adherence of flat surfaces

1911 ◽  
Vol 86 (583) ◽  
pp. 25-35 ◽  
Keyword(s):  
Liquid Film ◽  
Atmospheric Pressure ◽  
Plane Surface ◽  
Close Contact ◽  
Hardened Steel ◽  
Atmosphere Pressure ◽  
Flat Surfaces ◽  
Produce Steel ◽  
End Gauges ◽  
Molecular Attraction

In recent years it has been found possible to polish plane surface of hardened steel to a degree of accuracy which had previously been approached only in the finest optical work, and to produce steel blocks in the form of end gauges which can be made to adhere or "wring" together in combinations. Considerable interest has been aroused by the fact that these blocks will often cling together with such tenacity that a far together with such tenacity that a far greater force must be employed to separate them than would be required if the adhesion were solely due to atmospheric pressure. It is proposed in this paper to examine the various causes which produce this adhesion: firstly, showing that by far the greater portion of the effect is due to the presence of a liquid film between the faces of the steel; and, secondly, endeavouring to account for the force which can be resisted by such a film. The only previous experiments in this direction appear to be those carried out with Whirworth surface plates by Prof. Tyndall in 1875. By wringing together two of these plates and suspending them in a vacuum he proved that the adherence between them was not caused solely by atmosphere pressure as had been previously supposed. According to Goodeve, the conclusion at which Tyndall arrived was that the plates adhered by the molecular attraction of the bearing points brought into close contact by reason of the near approach to absolute truth of surface. Frequent references have been made to these experiments, and the conclusion of Tyndall appear to have been generally accepted.

End gauges with high stability

1976 ◽  
Vol 18 (5) ◽  
pp. 411-413
Author(s):  
V. D. Sadovskii ◽  
A. Z. Polkova ◽  
G. N. Bogacheva ◽  
E. K. Ivanova
Keyword(s):  
High Stability ◽  
End Gauges
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