The Theater of Hydraulic Machines, Volume II

H G; Cog-wheel f; engaging; box; determine. H is a pinion or disk that carries the chain in motion.

...it can be; for the longer, the more surely it runs. Furthermore, the width and depth are useful so that it is not filled with dust or horse manure as quickly, which might enter the socket; therefore, it must be cleaned frequently by the driver. Fixed to this spindle or beam is a strong ring or cog-wheel CD, whose arms and connection can be seen in the floor plan in Figure II, where first four arms a, b and c, d grasp the square spindle. Then four pieces, such as e, f, g, h, are inserted into the square, the angles of which are again supported by four others i, k, l, m, and this entire frame is provided with twelve braces, which are designated here in Figure II as o, and in Figure I by two pieces as m, n. The wheel must not be less than 18 to 20 ells an ell is approximately 2 feet in diameter, so that the horses do not have to walk in too narrow a circle, which is very harmful to them. This cog-wheel CD meshes with its teeth into a pinion H which is fixed to a strong square horizontally lying shaft EF, and on which is also fixed at the same time a strong disk MC, which is called the block pulley/sprocket, and over which the chain passes, as can be clearly seen for the box-work in Part I, Table XXI, and for the tassel-work in Table XXXV. The disk or block should be 6 to 8 feet in diameter for a box-work. For a tassel-work, 4 feet is sufficient in a pinch. With the pinion H, one has to regulate oneself according to the force and the load, especially with the tassel-work; for with the box-work, I can hang on many or few boxes, according to whether I find that the power can manage it, but with the tassel-work I cannot take away or add anything, and it remains as the pipes were once made. Although when the work is newly leathered, or the tassels are covered with new leather, often twice as much force is required than when they have already settled. In the case of the box-work, it is better that the pinion be somewhat smaller than the block, and the same therefore advance more. The reason is: if the pinion is exactly 8 feet in diameter, as the block is, then in one revolution of the wheel of 48 feet in diameter, the pinion and block will revolve 6 times, and 24 ells of chain will pass over the block. But if the pinion is only half as large as the block, namely 4 feet, then in one turn of the cog-wheel it will have to go around 12 times together with the block, and 48 ells of chain will run off; if now twice as much water as the other is to be lifted, it must follow that I must weight the chain with twice as much on the large pinion. As, namely: if the horses have brought out 20 centners a unit of weight, roughly 100 kg per turn in proportion to the depth with the small pinion, one must weight the chain with 40 centners with the large pinion. I will show the calculation somewhat more clearly on the machine in the VII. Table. Otherwise, I will advise that one make the block as large in diameter as the well or shaft will allow, and even if it were 12 feet, one can give it a much faster movement, and the chain does not need to be weighted as heavily; also, the costs for the boxes are saved. a E indicates the shaft or well. The dotted lines indicate the chain with the boxes.

§. 12.

Two machines with water-wheels in profile, for

box-, tassel-, or pocket-work, when the water must be raised higher

than the power or the water-wheel

or power stands.

Table V. Figure I. is AB the water-wheel, on whose shaft the cog-wheel C is attached, which engages into the pinion E, and thereby drives the long vertical shaft HG