. Machinery and processes of the industrial arts, and apparatus of the exact sciences. 122 PARIS UNIVERSAL EXPOSITION. way. Its strength is very considerable, but cannot be indefinitelyincreased, since a thickness exceeding that which is adopted wouldbring too great a cross-strain on the metal. A number of these jointshave been in operation without accident for several years. The modeof securing the spiral at its extremity is shown in Fig. 38. Afterthe end has been riveted to the plate, a cross-bar is fastened belowthe rivets, so as to prevent a flexure at the point weakened by wi
. Machinery and processes of the industrial arts, and apparatus of the exact sciences. 122 PARIS UNIVERSAL EXPOSITION. way. Its strength is very considerable, but cannot be indefinitelyincreased, since a thickness exceeding that which is adopted wouldbring too great a cross-strain on the metal. A number of these jointshave been in operation without accident for several years. The modeof securing the spiral at its extremity is shown in Fig. 38. Afterthe end has been riveted to the plate, a cross-bar is fastened belowthe rivets, so as to prevent a flexure at the point weakened by windmill of Mr. Thirion, though self-adjusting to the wind, is not-provided with the ordinary wind-vane. In fact, the sails themselves ful-fil the usual function of the vane, only that they are no longer, as inthe ordinary construction, presented to the wind on the side of the towerfrom which the blast comes; but swing round, so to say, behind thetower. This part of the structure is therefore merely an open weight of the sails is balanced by a heavy counterpoise, and th
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Keywords: ., bookcentury1800, booksubjectmachinery, booksubjectscientificappa
