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.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The dustcover area of the pistol is oversized and houses FK Brno's sliding counterweight system. This is designed to help tame muzzle rise and recoil from the 7.5 FK round.
The bed includes three main parts: a vertical driver unit, horizontal driver unit, and unique 2-DOF counterweight system. Due to the new counterweight system, the required torque is extremely small and the driving sound is suppressed to less than 40 dB.
It completed its work to replace the antiquated hemp-and-sandbag system with a more modern (though still manual) counterweight system in September.
There's so little time between shots in the events of Sport Pistol and Rapid Fire, there's an active counterweight system in the barrel reducing the movement of the gun and limiting recoil.
Dobsonian owners might need some form of counterweight system when swapping these with smaller, lighter eyepieces.
The new model also shares the same counterweight system as the TMS9000E, so owners can interchange counterweights and wing weights from the previous-generation crane, giving them flexibility in configurations across an entire fleet.
It consisted of a steel frame, a suspension harness, and a counterweight system. The steel bars are 60 mm x 30 mm and the frame has a base of 300 cm x 226 cm with a height of 200 cm.
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.
* To simplify set-ups, a counterweight system enables the arm to be used without mountings on any surface.
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.