1903. 1902. Test No. 1. Test Made in Massachusetts, U. S. A. COTTON SPINNING MILL TEST. Engine - Geo. H. Corliss Cross Compound Engine, 24" and 48" x 48" stroke. The mill is run by two engines. The test was made upon the mill run by No. 1 Engine. Machinery Operated - All Preparatory Machines. Spinning, both ring and selfactor (mule) and looms. The looms, however, were lubricated with the same material for both tests. Subdivisional tests were made to secure the power of the looms, so it could be deducted from the total power of each test in order that the per cent. of frictional influence might be upon the basis of the total load effected by the change in lubrication. Complete Test-6 Days. 4 indicators. 1,400 indicator cards. Mill Oils. First Test.- Full Mill Load. 3 operators. Difference of Averages 8.2 H.P. or 1.5 per cent. on Average of Test. Difference of Averages 16.2 H.P. or 2.3 per cent. on Average of Test. Result. MILL OILS.- Average of November 18, 19, 20, 1902, (add 19.51 H.P. 6.5 I.H.P. for machines, deduct 254.0 H.P. for looms) NEW OILS.- Average of April 21, 22, 23, 1903, (add 22.85 H.P. for machines, deduct 254.0 H.P. for looms). 543.21 481.75 Reduction, 61.46 or 11.31 per cent. New Oils. Difference of Averages 11.9 H.P. or 6.2 per cent. on Average of Test. 192.7 Difference of Averages 15.7 H.P. or 9.3 per cent. on Average of Test. Result. MILL OILS.-Average of November 18, 19, 20, 1902, (five tests). Reduction, . or 12.35 per cent. . Average Variation in H. P. Variation per cent, on aver age of day. Average Variation in H. P. Variation per cent. on aver age of day. Spinning Frames. Speeds secured from 20 Frames. (All frames marked for comparison.) Speed of the engine was opposed to the general increase in the speed of the entire mill. The mill shows an increase in speed of over 1 per cent. The efficiency of the spinning frames has been very greatly increased. The production of the frames is regulated by the speed of the tin cylinder or drum. The increase of 7 R. P. M. (.63 per cent.) was utilized by changing the speed of the top rolls to feed more cotton roving to the spindles, which by their higher speed were on the above basis putting more twist into the thread than wanted. Temperature and Relative Humidity. Temperature in favor of a Reduction in Power. Relative Humidity in favor of a Reduction in Power during the last two days. Mill Oils. Test No. 2. Test made in Rhode Island, U. S. A. POWER TEST IN A WORSTED MILL IN AMERICA. Engine-Geo. H. Corliss Cross Compound Engine. Cylinders 20" and 40'' x 6' stroke. Steam Pressure 110 lbs. 63 R. P. M. Developing about 600 H.P. Newburg Cross Compound Engine. Cylinders 22" and 44" x 4' stroke. Machinery Operated- Spinning, doubling, (twisting) and all preparatory and finishing machinery. Complete Test-6 days. 8 indicators. 1,576 indicator cards. 3 operators. Difference of Averages 11.2 H.P. or 1.8 per cent. on Average of Test. Variation in 702.9 Difference of Averages 34.0 H. P. or 4.8 per cent. on Average of Test. Variation per cent. on aver age of day. New Oils. 1906. Average Difference of Averages 27.1 H.P. or 4.6 per cent. on Average of Test. Difference of Averages 12.5 H.P. or 1.9 per cent. on Average of Test. Owing to the great difficulty of getting the two engines to run at a uniform speed on a mill load no test could be made upon the Engine and Transmission Load. Reduction,.. Results of Power Test. No. 1 Engine. MILL OILS.- Average January 23, 24, 25, 1906, 608.6, (add 3.0 H.P. Machinery Correction) NEW OILS.- Average May 22, 23, 24, 1906, 589.5, (add 6.8 H.P. I.H.P. 611.6 596.3 15.3 H. P. Variation per cent. on aver age of day. Variation in H. P. Variation per cent. on aver age of day. |
