Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 311
levers x x shift the other two rods d d from one to the other of the other set of journals, thenext rotation liberating these and shifting the first set. In this way it will be seen that during oneoperation, when the trap-board c descends, the journal g descends with it, the trap-board b at the… … elevated, and with it the journal /, the trap-board b at the same time descending, and with it thejournal e, and when this has reached the end of its down motion, the rods od continue the motiondown sufficiently to clear the sockets of the journals, and then by their own weight the rods fall backto…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.