When was invented the first automatic?

In 1904.

The first automatic was invented in 1904 by the Sturtevant brothers of Boston. It provided two forward speeds that were engaged and disengaged by the action of centrifugal weights without need for a foot-operated clutch. As engine speed increased, the weights swung out to engage bands — first the low-gear band and then the high-gear band. The unit failed because the weights often flew apart.

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