The London, Edinburgh and Dublin philosophical magazine and journal of science . ] XVIII. On certain Modifications of a Form of SphericalIntegrator. By Fkedeeick John Smith, Oxon* WHILE working at the subject of Dynamometric Measure-ments, a great number of different forms of mechanicalintegrators were attached to a transmission-dynamometer(Phil. Mag. vol. xv. p. 87). In one of these the small diskof a Morin integrator (Phil. Mag. vol. xvii. p. 59) wasreplaced by a sphere carried between four little cylinders ;the sphere was made of phosphorbronze (Ashmol. Soc. 1884).As long as the dynamo
The London, Edinburgh and Dublin philosophical magazine and journal of science . ] XVIII. On certain Modifications of a Form of SphericalIntegrator. By Fkedeeick John Smith, Oxon* WHILE working at the subject of Dynamometric Measure-ments, a great number of different forms of mechanicalintegrators were attached to a transmission-dynamometer(Phil. Mag. vol. xv. p. 87). In one of these the small diskof a Morin integrator (Phil. Mag. vol. xvii. p. 59) wasreplaced by a sphere carried between four little cylinders ;the sphere was made of phosphorbronze (Ashmol. Soc. 1884).As long as the dynamometer was driven with but littlevariation, the results were satisfactory; but as soon as one had todeal with quick variation, either of tension of belt or of velocity,it was found that the moment of inertia of the sphere was aserious obstacle to accurate results. It appeared probable thatno instrument dependent upon the action of gravity could berelied upon. This being the case, it was evident that if asphere was to be used it ought, in the first place, to be as light Fig. as practicable and, secondly, as firmly held as possible from anyslip. These two ends have been arrived at as follows :—Thesphere Q is made hollow in order to be light, and it movesbetween six wheels; of these, four wheels, DEFG (fig. 1), are* Communicated by the Author. L2 148 Modifications of a Form of Spherical Integrator. fixed upon a frame, while two others K L, held in a frameSMNV (fig. 2) rocking about points at S Y, keep the sphere Fig. 2.
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectscience, bookyear1840
