The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . CENTERING INDICATOR. In centering quickly on the universalhead, this tool is indispensible. It will also be found valuable for otherwork. It is not kept by dealers, and will have to be made by the watch-maker. The body of the indica-tor is made of sheet brass, and -^<^ -<^ Cshould be about five inches longby two inches in width at thelarger end. The shank C, ismade to fit in rest holder, and iseither riveted or soldered to thebody; R is steel or copper wiresharpened to a fine point
The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . CENTERING INDICATOR. In centering quickly on the universalhead, this tool is indispensible. It will also be found valuable for otherwork. It is not kept by dealers, and will have to be made by the watch-maker. The body of the indica-tor is made of sheet brass, and -^<^ -<^ Cshould be about five inches longby two inches in width at thelarger end. The shank C, ismade to fit in rest holder, and iseither riveted or soldered to thebody; R is steel or copper wiresharpened to a fine point, andbalances on a pivot at i; ^ is aclock hand pivoted to the bodyat I; 2 and 2 are pivot joints only, and do not go through the body; fig. Cwill 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 restholder and adjust it till the needle point R touches the top of hole as. Fig. Centering Tool. 64 shown in fig. 2. The index hand will tlien note the variations as thehead revolves. If too low, the hand will point above center and if high,vice versa. CENTERING TOOL. A small, steel point used for accurately Fig. .56. locating centers. Figure 59 illustrates the O. K. centering tool, which ismade to fit any tailstock spindle or taper chuck. CENTER PUNCH. A punch having a sharp point, for marking Fig. 59. the center of work swung in a lathe, so that it may readily be removedand replaced without the trouble of finding the center each time. CENTER OF GRAVITY. That point of a body about which allits parts are balanced, or which, being supported, the whole body willremain at rest, though acted upon by gravity. Webster. CENTER OF GYRATION. That point in a body rotating aroundan axis, at which, if a given force were applied, it would produce the sameangular velocity in a given time as it would if the whole mass of the bodywere collected at that point. Webster. Britte
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Keywords: ., bookcentury1800, bookdecade1890, bookidamericanwatc, bookyear1892
