The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 194
, with the pall-shaft, &c., is made, by the motionof the arm attached to the engine, to describe an arc of 36°, or tomove through one-tenth of a circle. The ends of the palls respectively rest on, and slide over, sixcylinders placed side by side on the central shaft, all of which arefree to… … On the right-hand edge of each cylinder are cut 10 slots, and onthe left-hand, which overlaps the edge of the next, only one slot;these slots being of such a size as will admit the end of one of thepalls; then on the back motion of the frame-work, &c., the pall iscarried back till it drops in,…
Architecture · Civil engineering · Science
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