ELECTROMAGNETIC STEPPING MOTOR Russian patent published in 2003 - IPC

FIELD: radio electronics; automatic-control devices and electromechanical actuators converting electric pulse to digital shaft displacement. SUBSTANCE: stepping motor has electromagnet with coil in the form of part of toroid and flexible frictional members providing engagement between armature and output shaft made in the form of nonmagnetic disk installed on axis of revolution inside circumference formed by extension of inner outline of coil. Flexible frictional members and armatures are made in the form of Bourdon tubes filled with ferromagnetic liquid, hermetically sealed, and installed on both sides of disk in planes parallel to disk plane. Pressure-intake ends of Bourdon tubes are attached to fixed base in vicinity of axis of revolution of nonmagnetic disk and their loose ends are secured in vicinity of disk periphery near one of butt-end of coil so that when magnetized they tightly clamp nonmagnetic disk. EFFECT: simplified design; enhanced operating reliability of motor parts. 1 cl, 2 dwg