[106]. Regulator, or reservoir, for blowing engines to steady the blast. The weighted piston serves the same purpose as an air vessel to the ordinary pump.
[107]. Disc blower, with elastic diaphragm piston.
[108]. One-crank three-throw blower, for organs, &c., to give a continuous blast. The three feeders deliver into the central triangular box.
Section 8.—BEDPLATES, FOUNDATIONS, AND FRAMING OF MACHINES.
The skeleton framing of a machine for any purpose should be rigid, as light as is consistent with strength and stability (in some cases weight is necessary to minimise vibration), and the ribs, or members of the frame, should be so disposed as to afford the requisite support for all bearings, centres, &c., without redundance; and lastly, symmetry, and a certain degree of elegance and proportion, are desirable. The illustrations are necessarily typical only, and suggestive.
[109]. Girder section bedplate for horizontal distributed bearing, as in a horizontal engine. It may be used double, and the two parts connected by cross pieces and bolts, as [No. 112].
[110]. Open box bedplate.
[111]. Closed box bedplate.
[112]. Double box bedplate with cross tie pieces.