GEAR FOR STEP-BY-STEP TURNING AND FIXING OF OBJECT Russian patent published in 1995 - IPC

FIELD: instrumentation engineering. SUBSTANCE: gear includes rotary shaft 27 which carries object under check, gear-wheel 37 made fast to shaft 27, driving mechanism in the form of at least three V-shaped magnetic circuits 16 with coils, shaft fixing unit in the form of hollow cylinder with toothed internal surface and not less than two toothed sectors 28 with magnet stress-pulled between them. Hollow cylinder and toothed sectors are made fast correspondingly to rotary shaft and case and their teeth pitches are identical. Gear is also provided with unit of shaft emergency turning, arrester and sensor of position of rotary shaft relative to case. EFFECT: simplified design, enhanced operational reliability. 4 cl, 4 dwg