counterweight arbor

counterweight arbor

A movable frame in which are stacked the modular counterweights of a counterweight system.
References in periodicals archive ?
A counterweight arbor was added to allow the use of a smaller capacity winch.
It comes up from the flown element, goes over the traveling sheave, is muled to a sheave on the top of a counterweight arbor, and then comes back to another sheave at the far end of the track which brings it back to an anchor on the carrier.
To raise or lower the flown element, the counterweight arbor is moved by half of the desired distance (e.