Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 502
Some packing-blocks are tightened sideways, by screws which are inserted in the sides of the pack-ing ports; but in the plate the block is tightened by its own wedge-shape point, which presses againstanother wedge-formed piece, cast on the valve-casing, as will be understood by a reference to Fig.…
Mechanical engineering
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