. An Electrical Measuring Machine for Engineering Gauges and Other Bodies . A B. ML .^ (b) Sodium light is used from a bunsen burner, the heat of which iscarried away by a funnel and stove piping. On each screw end is fixed acap with plane end, to which is screwed a microscope slide. On one slideA is a small lens (fig. 7) mounted by Canada balsam. The sodium lightfalls on a glass slide at 45 degrees, and is reflected to the microscope asshown in the figure (which is a plan). The Newtons rings formed betweenthe lens and slide Bx are caused to open from or close to their centreaccording as one s
. An Electrical Measuring Machine for Engineering Gauges and Other Bodies . A B. ML .^ (b) Sodium light is used from a bunsen burner, the heat of which iscarried away by a funnel and stove piping. On each screw end is fixed acap with plane end, to which is screwed a microscope slide. On one slideA is a small lens (fig. 7) mounted by Canada balsam. The sodium lightfalls on a glass slide at 45 degrees, and is reflected to the microscope asshown in the figure (which is a plan). The Newtons rings formed betweenthe lens and slide Bx are caused to open from or close to their centreaccording as one screw end is moved to or from the other screw end. This plan of calibration is not satisfactory if the screw or nut be bent or drunk, since then the plate B moves to and from A at each rotation ina periodic way. But the method indicates any such defects in screw andnut, however small. Curve I (fig. 9) obtained thus shows that the right screw-nut system acts as if bent. From the curve we can find the extent of thisrhythmic error. The length A C (fig. 7) is 50 mm., the to-and-fr
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectproceed, bookyear1906
