A constant speed drive (10) drives output shaft (20) counterclockwise. Speed control drum (30) may rotate clockwise with respect to shaft (20) but is prevented from rotating counterclockwise with respect to shaft (20) by a one-way clutch. Cable (60) is connected at its midpoint to drum (30). One end of cable (60) is connected at one end to rewind device (70). The other end of cable (60) is connected to handle (56) after travelling through spring resisted pulley (52). The speed at which the cable may be drawn out is limited by the action of the clutch and force of the spring (40).
