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Knight's Mechanical Encyclopedia (ed. Knight) 6 0 Browse Search
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Jr.July 9, 1861. 37,573,J. J. GreenoughFeb. 3, 1863. 37,726,C. H. MorganFeb. 17, 1863. 38,253,Joseph WellsApril 21, 1863. 38,452,S. E. PetteeMay 5, 1863. 40,001,Joseph WellsSept. 15, 1863. 42,313,Joseph WellsApril 12, 1864. 43,773,J. M. HurdApril 12, 1864. 45,999,E. A. HollingsworthJan. 24, 1865. 49,454,B. B. TaggartAug. 15, 1865. 49,736,B. F. EllisSept. 5, 1865. 49,951,E. W. GoodaleSept. 12, 1865. 62,342,Kirk and HowlettFeb. 26, 1867. 64,537,G. L. JaegerMay 7, 1867. 70,601,E. B. OlmstedNov. 5, 1867. 74,190,James ArkellFeb. 11, 1868. 80,298,George H. MallaryJuly 28, 1868. 83,648,George H. MallaryNov. 3, 1868. 84,076,C. AmazeenNov. 17, 1868. 87,608,Joseph WellsMarch 9, 1869. 87,689,H. C. LockwoodMarch 9, 1869. 90,624,C. F. AnnanJune 1, 1869. 94,511,J. P. PultzSept. 7, 1869. 101,299,C. J. MoffattMarch 29, 1870. 104,169,H. LawJune 14, 1870. 105,099,Lorton and DavisonJuly 5, 1870. 110,536,C. F. AnnanDec. 27, 1870. 111,802,C. F. AnnanFeb. 14, 1871. 111,803,C.
is an outer sleeve, and is fast to the largest cog-wheel. By slipping the band on to one or the other of the fast pulleys, variable speeds are communicated to the lower cog-wheel shaft, as relative sizes of the pairs of wheels will indicate. Olmsted's (Fig. 6906) is designed for controlling the speed of light machinery, particularly sewing-machines. The idler-pulley a is journaled in a swinging frame, and is brought into frictional contact with the cone-pulleys b c, the former of which is e idler a causes it always to have an equal bearing on the conepulleys when in gear, and by shifting the treadle and swinging frame to the right or left, the relative velocities of the driving and driven cone pulleys may be varied as desired. Olmsted's variable-speed pulley. Wright's variable-speed pulley. Variable gears. Wright's variablespeed attachment (Fig. 6907), for sewingma-chines, etc., consists of two disks a b with slightly rounded faces; the former is placed on the drivin