Spring balanced support device comprising at least one arm , connected to its surroundings via a movable pivot point and a second arm , the first and second arm forming an arm mechanism to which a mass may be coupled directly or indirectly at a mass coupling point , wherein an axis extends through the movable pivot point and extends substantially parallel to a direction of a force exerted on the spring balanced support device at the mass coupling point due to the force of gravity on the mass , characterised in that : - the second arm is connected to the first arm at an elbow pivot point , the second arm being coupled to the surroundings via a second movable pivot point , wherein the second movable pivot point is movable substantially parallel to said axis , or - the second arm is connected to the first arm via a pivot connection , the second arm having a fixed orientation with respect to the axis , wherein the pivot connection is slideable along the first or second arm, wherein the second arm is movable along a direction substantially parallel to said axis , wherein the arm mechanism is balanced by at least one spring , at one end directly or indirectly connected to the arm mechanism at a spring connection point , the other end directly or indirectly connected to the surroundings at a spring base point , wherein the spring base point is located substantially on said axis , or wherein the spring base point is located at a distance from said axis along a line which intersects the axis and which extends substantially parallel to a pivot point axis of the movable pivot point , wherein the movable pivot point is movable along the axis in order to adjust the spring balanced support device . the first and second arm forming an arm mechanism to which a mass may be coupled directly or indirectly at a mass coupling point , wherein an axis extends through the movable pivot point and extends substantially parallel to a direction of a force exerted on the spring balanced support device at the mass coupling point due to the force of gravity on the mass , characterised in that : - the second arm is connected to the first arm at an elbow pivot point , the second arm being coupled to the surroundings via a second movable pivot point , wherein the second movable pivot point is movable substantially parallel to said axis , or - the second arm is connected to the first arm via a pivot connection , the second arm having a fixed orientation with respect to the axis , wherein the pivot connection is slideable along the first or second arm, wherein the second arm is movable along a direction substantially parallel to said axis , wherein the arm mechanism is balanced by at least one spring , at one end directly or indirectly connected to the arm mechanism at a spring connection point , the other end directly or indirectly connected to the surroundings at a spring base point , - the second arm is connected to the first arm at an elbow pivot point , the second arm being coupled to the surroundings via a second movable pivot point , wherein the second movable pivot point is movable substantially parallel to said axis , or - the second arm is connected to the first arm via a pivot connection , the second arm having a fixed orientation with respect to the axis , wherein the pivot connection is slideable along the first or second arm, wherein the second arm is movable along a direction substantially parallel to said axis , wherein the spring base point is located substantially on said axis , or wherein the spring base point is located at a distance from said axis along a line which intersects the axis and which extends substantially parallel to a pivot point axis of the movable pivot point , wherein the movable pivot point is movable along the axis in order to adjust the spring balanced support device . <EOS>