Profile: Doughty Engineering Ltd. is a manufacturer of rigging, suspension, and lifting equipment for the film, TV & theater industry. Our products are aluminum clamps, steel clamps, curtain track, pulleys, hanging and suspension. The trigger clamp is designed to allow one person to hang heavy luminaires and scanners. The weight of the object being hung, becomes it's own safety factor by automatically closing the trigger & the bottom half of the clamp. Our barrel strainers are used to tension wire rope assemblies. A range of lifts, poles, and arms designed to extend the reach of lighting stands, and suspend equipment from lighting grids. An extension plug is generally used with a socket to join two scenery panels together. Our barrel trolleys are normally used to suspend pantographs from fixed or rolling pipe grids and barrel hoists.