ther end the copper pipe is bolted to a plain flange ; while the part in the gland is quite loose , expanding and contracting with the varying pressure . Eccentric and link motion . — Various descriptions of valve gear are in use , but the one generally adopted is the double eccentrics and link… … Fig . 275 . — Eccentric Sheaves . Fig . 276 . — Eccentric Strap and Rod . a , Eccentric . bb , Keys . C , Bolt for A , Eccentric strap . b , Rod . c , Lubricator cup . d , Jaw eccentric . and pin for link . ling only a small portion of its stroke , and kept running for weeks in this reduced grade ,…
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