. Machinery and processes of the industrial arts, and apparatus of the exact sciences. of glass is shown, mountedon the axis EE, to which is attached a crank. In point of fact, thevelocity of rotation given to the disk, in practice, is greater than can bedirectly imparted by the hand; and the axis EE7 is turned by a pulleydriven by a larger wheel, to which the power is immediately appliedby means of a band. The disk is coated, over a pretty large extent ofthe surface of each semi-circle, by tinfoil sheets, P and Q. These sheetsare applied on the side of the disk toward the fixed plate P, and a
. Machinery and processes of the industrial arts, and apparatus of the exact sciences. of glass is shown, mountedon the axis EE, to which is attached a crank. In point of fact, thevelocity of rotation given to the disk, in practice, is greater than can bedirectly imparted by the hand; and the axis EE7 is turned by a pulleydriven by a larger wheel, to which the power is immediately appliedby means of a band. The disk is coated, over a pretty large extent ofthe surface of each semi-circle, by tinfoil sheets, P and Q. These sheetsare applied on the side of the disk toward the fixed plate P, and aremade large enough to fold over the circular edge and admit of beingpasted down, so as to form on the crank side of the disk the annularcoatings p q. These sheets and annular bands are separated from each TOPLERS ELECTRO-STATIC INDUCTION MACHINE. 549 otlier by an intervening space of uncoated glass. The fixed plate P wasoriginally constructed by the inventor, of metal, insulated by the threesupports s s s, and placed at a distance of not more than live milli- Fig. 115. Fig. 116. f. Construction of Toplers Machine. meters from the disk; but he has since, for a reason which will presentlyappear, made it of thin glass, coated, on the side most distant from thedisk, with a sheet of tinfoil equal in size to P or Q. Twovertical con-ductors, 0 and Cy, are attached to the horizontal insulating supportsshown in the figurej and are put into communication with each otheror with the ground, at pleasure, by means of the wires/and/7. To theconductors 0 and C, are added the rods and knobs b and &, which lastare furnished with points directed toward each other and adjustable atdifferent distances. The conductors are also put into communicationby contact with the bands p and g, by means of light metallic springsr and r. Such being the construction of the machine, its operation is as follows: P is put into conducting communication with some feeble butconstant source of negative electricity, as,
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Keywords: ., bookcentury1800, booksubjectmachinery, booksubjectscientificappa
