. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . in 1831, 32, 33, and 34, by means of new processes. Summary Description of the Apparatus used.—In the smelting yards of this ancient foundry, upona flag-stone foundation, and at the side of a trench. Fig. 3047, was established a horizontal bed,composed of two parallel oak beams A A, 0 • 98 ft. square, and 26 • 24 ft. long, connected and supportedby sleepers 3*28 ft. apart. These beams, which jutted about 4-26 ft. beyond the edge of thetrench, were connected
. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . in 1831, 32, 33, and 34, by means of new processes. Summary Description of the Apparatus used.—In the smelting yards of this ancient foundry, upona flag-stone foundation, and at the side of a trench. Fig. 3047, was established a horizontal bed,composed of two parallel oak beams A A, 0 • 98 ft. square, and 26 • 24 ft. long, connected and supportedby sleepers 3*28 ft. apart. These beams, which jutted about 4-26 ft. beyond the edge of thetrench, were connected with four uprights B B, between which was placed a platform F F, whichbore the pulley for passing the cord, to which was suspended the motive weight, placed in a box K. 5 H 1570 TEICTION. This cord was fixed horizontally to a sled D, charged with weights, under which was placed the body-to be experimented upon. The cord, instead of being attached directly to the sled, was fastened to the front plate of adynamometer with a style, whose flexure measured the tension of the cord, both at its starting andduring its motion. 304Ï.. The axis of the pulley had a copper-plate H, perfectly smooth and covered with a sheet of this plate, clockwork communicated uniform motion to a style, formed of a brush filledwith India ink, whose point described a circle 0 • 459 ft. in diameter. The parallelism of the planeof the circle, and that of the plate, was also perfectly established by precise methods, and the contactof the brush was produced or interrupted at will. Upon the box K may be placed two others for holding weights, which, after producing themotion, may at a certain height be stopped by cleats, so that the motion continues only in virtueof the load and weight of the box Q. By this means, we may at will obtain, with the box Q alone,an accelerated motion, and with the three boxes, a motion at first accelerated, then uniform orretarded, according as the weight of th
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Keywords: ., bookcentury1800, bookdecade1870, bookidsp, booksubjectengineering
