. Appleton's dictionary of machines, mechanics, engine-work, and engineering. Fig. 1. num. As the rates of expansion of these two metals are widely different, the variation of temperatureto which the spiral is exposed, will produce a considerable movement of torsion, or rotation at the bot-tom of the helix, the top being fixed. This principle is familiar in Breguets torsion thermometer, andMr. Saxton has only applied it to a novel case, with an improved arrangement at the upper extremity ofthe spiral, for magnifying and reading the indication furnished. The motion of rotation given by achange
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. Fig. 1. num. As the rates of expansion of these two metals are widely different, the variation of temperatureto which the spiral is exposed, will produce a considerable movement of torsion, or rotation at the bot-tom of the helix, the top being fixed. This principle is familiar in Breguets torsion thermometer, andMr. Saxton has only applied it to a novel case, with an improved arrangement at the upper extremity ofthe spiral, for magnifying and reading the indication furnished. The motion of rotation given by achange of temperature, is very well fitted for reading, as by gearing it up, it gives a quite ample rota-tii in to an index hand. Within the spiral is a hollow tube, to which at the top the spiral is screwed fast,as shown in fig. 1. Within this tube is a small rod or axle, which is connected with the bottom of thespiral, and turns freely on a supporting pivot, so as to communicate the torsion rotation to a toothed THERMOMETER. 719 silver wheel on its top, which is shown in fig. 2; that p
Size: 1294px × 1932px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
