George Shepherd was a wealthy Melbourne oil company executive who regularly played cards with friends, seated in big upholstered chairs. But the tiny castor wheels fitted to the chairs made them difficult to move.
So from 1934 until 1939 Shepherd researched the physics of existing castors and proposed a new type of wheel that swivelled on an angled axle. With the weight of the chair offset from and below the axle, the wheel could be steered with much less effort. Shepherd made 60 different ver...
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