Patent ID: 6328487
Filing Date: 2001-12-11
Classification: F16M

Abstract:
A vertical plane counter-balancing structure for a television or motion picture camera, comprising:(a) means for fixing a camera;(b) a support for the means for fixing;(c) a first pulley system including:a first pulley having a first rotational axis that is movable in a vertical direction, anda second pulley having a second rotational axis that is movable in the vertical direction, wherein the second rotational axis is offset from the first rotational axis;(d) an elastic means;(e) a first rope or cable, wherein a first end of the first rope or cable is fixed to the elastic means and a second end of the first rope or cable is fixed to the support, wherein the first rope or cable contacts the first pulley; and(f) a second rope or cable, wherein a first end of the second rope or cable is fixed to the elastic means and a second end of the second rope or cable is fixed to the support, wherein the second rope or cable contacts the second pulley,wherein the first rope or cable compresses the elastic means when a load coupled to the means for fixing inclines at an angle between 0 and -90.degree. with respect to the vertical direction and the second rope or cable compresses the elastic means when the load coupled to the means for fixing inclines at an angle between 0 and +90.degree. with respect to the vertical direction.