Chicago : Engineering and Contracting Pub. Co. · leaf 559
arriage until the dipper arm hasbeen raised sufficiently, when the small end ofthe cam or eccentric releases the grip, andthe carriage follows up the boom. The automatic dumping arrangement isshown in the illustration. This is a lever armrigidly attached to the carriage, which acts/ii the |e\er… … Locomotive Crane With Attachment for Pile Driving, Cleveland Grade Crossing Work. raise and lower the boom and the other tooperate the shovel. The operator slacks mithe digging line until the can i; ge rolls downthe hooin, bringing the shovel lo the desiredposition. lie then releases entirely and…
Buildings
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