the controlling member comprising a ball

Full Title

Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously > the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only > in which movement in two or more ways can occur simultaneously > the controlling member being movable by hand about orthogonal axes, e.g. joysticks > the controlling member comprising a ball