Alfred Charles William Harmsworth, Motors and Motor-Driving (1902)
“ The free or direct gear moves with the impulse or pressure brought against the steering wheels or one of them by any ruts or obstructions on the road. This movement has to be resisted by the hand of the driver, as it is in some of the steam-cars with lever-steering handle and many of the wheel-steering light cars. An objection to the locked steering gear is that the worm gear rigidly holds the whole of the connections between it and the steering axle. Hence any shock by blow or heavy push at one wheel has to be withstood in all its force by the steering connections. ”
