The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 203
hus jireserving the tightness of joint without anycontact or rubbing of the piston against the cylinder, so that thereis no friction or wear, and no oil required for lubricating. The ringby reason of its elasticity adapts itself to any irregularity in thesurfaces of cylinders or pistons, and where… … Fig. 1 is a sectional drawing of so much of a lifting-pump withthe rolling packing applied thereto, a, a, is the working barrelof a common lifting-pump, h, i, is a hollow bucket or piston, c,is a valve made to open upwards, rf, d, is the elastic packingforced into an elliptical form by pressure…
Architecture · Civil engineering · Science
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