A simple and compact spring clutch suitable for use with paper feed means in copying machines and the like and provided with a coiled spring wound around two equally diametered bosses mounted in opposed relationship and for rotation on a common shaft driven from a drive source. The coiled spring is tightened and loosened with respect to the two bosses whereby when the spring is tightened, the two bosses are connected to transmit a drive and when loosened, the two bosses are separated to interrupt the transmission.