Abstract: In a dry-shaving apparatus which is adapted to be connected to an a.c. source and which comprises at least one reciprocating cutter, there is provided a self-starting single-phase synchronous motor for driving the cutter. Via at least one drive mechanism, which couples the drive spindle of the motor to the cutter and which converts the rotary movement of the drive spindle into a reciprocating movement of the cutter, the cutter is made to occupy substantially one of the two extreme positions in its reciprocating movement in those positions of the rotor of the motor in which the driving torque has zero value.

Abstract: A vibratory drive assembly for use with an electric motor driven apparatus comprising a plate driven in reciprocating vibratory movement and mounted on a frame via integral hinge strips which are arranged with their longitudinal directions transverse to the direction of vibratory movement and transverse to the longitudinal direction of an associated pin-shaped drive element.

Abstract: In an electromotorically driven apparatus with an apparatus component which can be driven by a drive element and which performs a reciprocating vibratory movement, strip-shaped integral hinges are provided for the parallel guidance of said apparatus component. To increase the life of the integral hinges, at least one spring which exerts a force component in the direction of the vibratory movement is provided for each of the integral hinges.