[321]. Marine type of rod end, having solid end, square brasses and cap.
[322]. Marine head, in which the brasses are extended to form the central block in halves, the rod end being of T shape and bolted through the brasses and cap.
There are innumerable varieties of the illustrated types of heads in use, every engineer having his own design.
Section 18.—CRANES, TYPES OF.
Our object here is to indicate or suggest general design or arrangement only, from which a selection can be made to suit requirements.
[325]. Is the common type of wharf crane with fixed post, the base plate being well bolted down to a solid mass of masonry.
[326]. Is also a common type of wharf crane, but with the post revolving in a footstep and base plate; this gives a better base than [No. 325].
[327]. Has no post, but a revolving frame and base plate with front and back friction rollers, and a centre pin.