Patent ID: 8596892
Filing Date: 2013-12-03
Classification: F16M

Abstract:
1. A pan and tilt head for supporting a payload the head comprising a base, a tiltable support including a platform for receiving a payload pivotally mounted on the base to tilt about a horizontal axis to either side of a neutral position in which the platform is generally horizontal and a balancing mechanism for the platform comprising an adjustable spring mechanism adjustably mounted at one end on the base to enable a pre-load in the spring mechanism to be varied and means to couple the tilting support to the spring mechanism so that tilting of the support produces a reaction force in the spring which fully counterbalances the support throughout its range of tilt to either side of the neutral position, wherein the adjustable mounting for one end of the spring mechanism includes an upright post mounted on the base and having a rotary height adjustment mechanism to raise and lower the post to vary a pre-loaded spring force in the spring mechanism to suit the payload on the support, and a manually operable rotary member mounted on the base for rotation about an upright axis having a stepped down drive to the height adjustment mechanism to provide a mechanical advantage in the rotation of the height adjustment mechanism for ease of operation of the mechanism.