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Centering Indicator

In centering quickly on the universal head, this tool is indispensible. It will also be found valuable for other work. It is not kept by dealers, and will have to be made by the watchmaker. The body of the indicator is made of sheet brass, and should be about five inches long by two inches in width at the larger end. The shank C, is made to fit in rest holder, and is either riveted or soldered to the body; R is steel or copper wire sharpened to a fine point, and balances on a pivot at 1; B is a clock hand pivoted to the body at 1; 2 and 2 are pivot joints only, and do not go through the body; fig. C will perhaps give a better idea of the end R. To center with this tool, unscrew your rest and remove it, then place the shaft C, fig. 57, in rest holder and adjust it till the needle point R touches the top of hole as shown in Fig. 2. The index hand will then note the variations as the head revolves. If too low, the hand will point above center and if high, vice versa.