Tik-Tok is a fictional character from the Land of Oz books by L. Frank Baum. He is one of the earlier robots to appear in literature, though that term was coined after Baum's death.
Tik-Tok (sometimes spelled Tiktok) is a round-bodied mechanical man that runs on clockwork springs which periodically need to be wound, like a wind-up toy or mechanical clock. He has separate windings for thought, action, and speech. Tik-Tok is unable to wind any of them up himself. He becomes frozen or mute or, for one memorable moment in The Road to Oz, continues to speak but utters gibberish. When he speaks, only his teeth move. His knees and elbows are described as resembling those in a knight's suit of armor.
As Baum repeatedly mentions, Tik-Tok is not alive and feels no emotions. He therefore can no more love or be loved than a sewing machine, but as a servant he is utterly truthful and loyal. He describes himself as a "slave" to Dorothy and gives her deference.
Tik-Tok was invented by Smith and Tinker at their workshop in Evna. He is the only model of his kind before the two disappeared. He was purchased by the king of Ev, Evoldo, who gave him the name Tik-Tok because of the sound he made when wound. The cruel king also whipped his mechanical servant, but that simply kept Tik-Tok's round copper body polished.