counterweight system

counterweight system

A permanent, overhead, theater stage rigging system; used to raise or lower scenery or lighting equipment which is counterbalanced by counterweights that ride in vertical tracks at the side of the stage.
References in periodicals archive ?
Independent, variable-speed winches for the boom and hook provide precise control, and the enhanced counterweight system ensures a low center of gravity for optimum performance.
In this very well-illustrated technical history ranging from ancient Egypt to medieval Europe, weapons expert Nossov describes how those on the inside and outside developed techniques of siege warfare, starting with simple battering rams and ladders, to methods of protection for soldiers attempting to use said battering rams and ladders against a castle armed with large burley men armed with boulders and boiling oil, to the truly fascinating weapons of mass destruction, including the trebuchet, a throwing machine with a counterweight system, the giant crossbow, burrowing machines, early cannon, and even a variety of multi-barreled gun.
A large set piece is flown in from above by the fly man, who operates the theater's counterweight system.
to develop the sideboom, hydraulic winch and counterweight system.