| 摘要 |
FIELD: mining, particularly, devices for charging paths of ventilation currents in air for ventilation of mine workings. SUBSTANCE: driving device has ring secured to shell of air current switch bend, drive with multibeam sprocket. In this case ring is made in form of segment rack with pins engageable with teeth of multibeam sprocket of working or standby drive fastened to vertical platform cantilevered to rod of horizontal bed with turning round rod and locking of position relative to horizontal bed depending on contact of pins of segment rack with teeth of multibeam sprocket of working or standby drive. EFFECT: higher operate reliability of driving device of fan air current switch. 3 cl, 3 dwg
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