Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . agewas only 5 feet. The distance traveled is now muchgreater, and the carriage sometimes carries 1, Previous to tire invention of the mule few spinnerscoidd make yarn of 200 hanks to the pound, thehank being always 840 yards. The natives of Indiawere at the same time making yarns of numbersranging from 300 to 400. Houlusworth of Mauches- MULE. 1495
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . agewas only 5 feet. The distance traveled is now muchgreater, and the carriage sometimes carries 1, Previous to tire invention of the mule few spinnerscoidd make yarn of 200 hanks to the pound, thehank being always 840 yards. The natives of Indiawere at the same time making yarns of numbersranging from 300 to 400. Houlusworth of Mauches- MULE. 1495 MULLION. ter, England, has lately succeeded in making , wliicli was woven in France. Mr. Roberts invented the self-acting mule in1825. By this, the carriage, after the thread isspun, is automatically returned to the rollers, re-quiring no attendance, except for the purpose ofjoining threads which may be accidentally is performed by chOdien. In Fig. 3254, a is the triple set of drawing rolls,working in heads on the roller-beam b. c isthe creel for holding the bobbins in three rows, e cis the carriage, resting on wheels y g, which run on therailway h. Spindles i are .set in a nearly upright po- Fig. Mute. sition. /c is one of a series of drum-cylinders withgrooves around the upper end for the driving band. This machine is not self-acting, but illustrates theprinciple of action. The drawing and .stretching action of the inidc-spiniur makes the yam finer and of a more uniformtenuity than the mere drawing and twisting actionof the throstle. As delivered b) the rollers, thethread is thicker in some parts than in others ;these thicker parts, not being so effectually twistedas the smaller parts, are softer and yield more read-ily to the stretching power of the mule ; by thismeans the twist becomes more equable throughoutthe yarn. Throstle-spinning is seldom employed for)mmbers higher than 40 or 50 hanks to the pound,because smaller yarn would not have st
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