. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 1847.] THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. 179 pensating elasticity of siioli springs. The shaft, A, is connpcted or coupled at c, to the sliaft, c, which carries the propelling-blade, D, formed as a cylindrical axis, which passes through the shaft, c, and the boss, E, where it is held by means of the cotter, e. The colter is cut or split in a ditferent direction to that generally practised. This form of cotter is fixed by opening the slit by a drift or wedge, and, wli
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 1847.] THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. 179 pensating elasticity of siioli springs. The shaft, A, is connpcted or coupled at c, to the sliaft, c, which carries the propelling-blade, D, formed as a cylindrical axis, which passes through the shaft, c, and the boss, E, where it is held by means of the cotter, e. The colter is cut or split in a ditferent direction to that generally practised. This form of cotter is fixed by opening the slit by a drift or wedge, and, wliile open, rivetting in'the small bolt, which leaves the cotter per- fectly secure and safe. Tlie bladi', D, tl)us supported on the shaft, C, part'ikes of the revolution of such shaft at the same time that it is free and at liberty to move on its own axis ; so that, supposing the shaft, c, to revolve in the direction indicated by the arrows, the re- sistance of the water will place the blade, D, in the position lepre- sented, resting against the shoulder or fice, f, formed in the buss, E, as seen at fig.'2 ; but when the revolution of the shaft, C, is reversed, the blade will vibrate on its axis from the same resistance of the water, and assume the opposite position, resting on the shoulder or face, g. The angles formed by the slioulders,/and g, with the shaft, c, are slightly varied, so that the angle formed by the shoulder, g, being more acute, will drive quicker when required, without any increase of speed in the rotation of the shaft, c. By this arrangement the blade, D, having free play on its axis between the shoulders, / and g, will at all times yield to any adverse pressure which may arise from the superior velocity of the vessel to that generated by the propulsion of the blade, D, itself ; so that, supposing sail to be on the vessel at the same time that the propeller is in action, and that the gale should suddenly carry the vessel beyond the speed due to the propeller,
Size: 3027px × 826px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectarchitecture, booksubjectscience
