. The miller, millwright and millfurnisher. gently around, noting what parts ofthe stone the quill touches. Alter the wedges or screws until the quill IRON JACKSTICK—BUSH. 299 touches the face equally all around. If stones are out of tram, the pressurewill be harder on one side than on the other, causing the driving points towear more on one side than on the other, while at the same time one sideof the stone grinds closer than the other. The stones should be trammed every time they are dressed. When notin tram they will rub in parts and make dark and specked flour. An im-provement over the ord
. The miller, millwright and millfurnisher. gently around, noting what parts ofthe stone the quill touches. Alter the wedges or screws until the quill IRON JACKSTICK—BUSH. 299 touches the face equally all around. If stones are out of tram, the pressurewill be harder on one side than on the other, causing the driving points towear more on one side than on the other, while at the same time one sideof the stone grinds closer than the other. The stones should be trammed every time they are dressed. When notin tram they will rub in parts and make dark and specked flour. An im-provement over the ordinary wooden board tram is the iron jackstick witha level, and all parts adjustable. The Iron Jackstick with Level is shown in Fig. i8i. It is fixedfirmly on the spindle with the screws A E C D just below the level is adjusted by a set-screw, F. When the bubble E in the levelretains the same position in the tube, no matter in which way the jackstickis turned, the spindle must be perfectly vertical. A quill, G, being fixed on. o Fig. i8i.—Iron Jackstick with Level. the outer edge of the jackstick and brought down just to touch the floor ofthe stone, will enable one to see whether or not the bed-stone is perfectlyhorizontal. During this operation the bubble should be watched to see that it doesnot leave the centre of the level, which would prove that the jackstick hadgot loose on the spindle, and consequently the indications of the quill wouldnot be correct. Bush.—A good bush not only keeps the spindle in place laterally, butby keeping it cool prevents it from rising and falling, and thus makes thegrinding uniform and better. The advantages of a perfect bush are that thefollowers will adjust themselves to the spindle under all conditions, whetherin perfect tram or out in any direction. When a spindle is out of tram itis so in one of three ways : Either it is slightly displaced laterally while re-maining in true vertical position, or it is reasonably central but
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectflourmi, bookyear1882
