. The miller, millwright and millfurnisher. e heavier the stone would be in unstable equilibrium. Al-though perfectly balanced if the upper and lower were exactly equal, yet itwould be in indifferent equilibrium. To put it in stable equilibrium, it is necessary that there shall be a slightpreponderance of weight in the lower half. Standing Balance seems often to be one of the greatest bugbears ofthe miller, and yet there is nothing about it to frighten any body or to causehim to lie awake at nights. Standing balance can be got and maintained veryeasily by having round the millstone a hoop of i
. The miller, millwright and millfurnisher. e heavier the stone would be in unstable equilibrium. Al-though perfectly balanced if the upper and lower were exactly equal, yet itwould be in indifferent equilibrium. To put it in stable equilibrium, it is necessary that there shall be a slightpreponderance of weight in the lower half. Standing Balance seems often to be one of the greatest bugbears ofthe miller, and yet there is nothing about it to frighten any body or to causehim to lie awake at nights. Standing balance can be got and maintained veryeasily by having round the millstone a hoop of iron with a right-hand screwat one end, the other end being riveted to the burr after the proper lengthhas been attained. The ends may then be joined. In order to tighten thehoop, the bolt joining the two ends may be turned very easily by means ofa nail inserted in a hole drilled through the bolt. Fig. 197 shows very crudely how to correct the weight of a stone thatwabbles much, by screwing on a piece of iron, g, as shown at e, on the oppo-. FiG. 197.—Attaching a Balance Weight. site side from where the stone hangs down, within an inch or two of the faceof the stone. If the spindle be in the centre of the stone, and the latter be outof balance, the trouble will most likely be a heavy block of burr on oneside, as at a. Running Balance.—A stone may be in prefect standing balance, yetvery much out of running balance. This is because it will be in standingbalance if there is as much downward pull of gravity on one side of anyvertical diametral plane as on the other, no matter whether or not there isequal mass or weight. In the matter of standing balance, one pound twofeet from a central vertical plane has as much influence in causing a down-ward pull of gravity as two pounds one foot. The tilting influence of a weight in standing balance is measured by itsmass (or weight) multiplied by its radial distance from the axis. When,however, it comes to running balance, the vertical act
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectflourmi, bookyear1882
