Lifting Mechanism - Rolled Steel Frame, High Torque A.c. Motor With Vee Belt Drive , Friction Lifting Drum System With Double Ball Bearings And Spring Release

On the top of standards is mounted a Headgear fabricated from rolled steel sections. The drive is through Vee belts from a high torque A.C. electric motor via flywheel and reduction gears to the lifter shaft. A friction lifting arrangements is fitted onto the lifter shaft which runs on double ball bearings and a central phosphor bronze bearing which also acts as a support. The friction lifter consists of a constantly rotating drum around which is arranged a steel band with friction lining. This band is anchored at one end to stud in the lifter drum and the other end is carried by a camshaft running through the lifter drum and actuated by a lever. To this lever is attached the pulling cord which passes round a capstan bush attached to the lifter shaft and so down to the operating cord. When the cord is pulled it tightens onto the rotating capstan bush and through the camshaft causes the friction band to grip the drum. There-upon the lifter drum is rotated thus lifting the tup by means of a lifting belt. A buffer provides a stop for the lifter drum in its extreme position. A spring ensures free fall by immediately disengaging the friction band from the drum immediately the pulling cord is released.