Elevator for bulk material and related apparatuses

An elevator for bulk material, comprising:

• a hollow, upwardly extending elevator housing having respective lower and upper openings and substantially enclosing an endless, flexible conveyor for conveying bulk material, entering the housing at the lower opening, to the upper opening, the elevator including a head assembly having a plurality of members secured together to define a hollow, rigid closure that closes the upper opening of the elevator housing, the elevator head supporting within the hollow, rigid closure a guide surface for guiding bulk material in the elevator head, said elevator head also includes supported within the hollow, rigid closure:
• a sensor surface of a mass flow measuring device, towards which the guide surface guides bulk material following its elevation by the said conveyor;
• and
• a rotatable drive transfer assembly for rotatably engaging and tensioning the flexible conveyor, the elevator head including a lever member extending laterally of the elevator beyond the sensor surface, the lever member being pivotably secured to a fulcrum that is fixed relative to the elevator housing, whereby on pivoting of the lever member about the fulcrum the elevator head and the components supported thereby move together, thereby permitting adjustment of the tension in the conveyor without substantially altering the positions of the conveyor, the guide surface and the sensor surface relative to one another.