A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . The dry meter invented by Messrs. Croll & Richards is superior in construction andaccuracy of measurement to that of Defries. It is shown in figs. 42(), 427, and 428. a a,{fig. 42t),) is a cylindrical case divided into two cylindrical compartments l)y the inflexiblemetallic diaphragm n. These compartments are closed at opposite ends by the metal discsc c. The latter perform the functions of pistons, and arc retained in their proper positionby universal joints at
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . The dry meter invented by Messrs. Croll & Richards is superior in construction andaccuracy of measurement to that of Defries. It is shown in figs. 42(), 427, and 428. a a,{fig. 42t),) is a cylindrical case divided into two cylindrical compartments l)y the inflexiblemetallic diaphragm n. These compartments are closed at opposite ends by the metal discsc c. The latter perform the functions of pistons, and arc retained in their proper positionby universal joints attached to each. The discs are restrained from moving through morethan a fixed space by metalHc arms and rods, shown in fig. 427, and wlien this .«;pace hasbeen once adjusted it cannot afterwards vary. It will be seen that the principle of thismeter is that of a piston moving in a cylinder; but, in order to avoid the friction which 748 METER, GAS. such an arrangement would cause if literally carried out, bands of leather, d d, are attached,which act as hinges, and allow of the motion of the discs without friction. 424 425. The gas enters the cylinder from the upper space containing the levers, valves, &c., { ;) its pressure forces the discs forward through the space limited, as above described.
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
