Tool holder, typically for anode changing in aluminium smelting, with cable sheaves and high speed/low force and low speed/high force drives

摘要

In order to produce low force at high speed motor 15 drives worm 17, wheel 16 and drum 14 to lift sheaves 18 via cable 13. In order to produce high force at low speed motor 22 drives screw jack 20/21 to attachment to lift attachment 19. This is stated to be useful for lifting anodes which require a high break-out force over a small lift, and a much lower lift force over a much larger vertical distance.