DEVICE TO PROTECT HOISTING PLANTS FROM SLIPPING OFF OF CABLE FROM PULLEY Russian patent published in 1995 - IPC

FIELD: hoisting and transportation machinery; mining industry, shaft sinking. SUBSTANCE: device has hoisting cable 4, supply source 8, rectifier 9 and relay 10; one lead of rectifier 9 and coil of relay 10 are grounded, and other lead of relay coil is connected to rectifier 9 by conductor 5 with bare section. Bare section of conductor forms closed loop through which strand of cable roved over pulley is passed. Offered device provides reliable operation of protection and ensures against reclosing of machine if trouble is not eliminated; in designing, owing to possibility of checking the position of cable in space, angle of deviation can be increased and, consequently, length of cable and height of headframe can be decreased. EFFECT: enlarged operating capabilities. 2 dwg