Show ELECTRIC VIBRATING I. I SCREEN FOR MILLS An electric Ie vl vibrating screen has been Invented by the chief mech mechanical engineer en en- en of the Utah Copper company B B. A A. A Mitchell It has been In actual op operation op- op for tor more than two years ears In one of the worlds world's largest concen concentrating ing mills demonstrating marked su superiority su- su over other screens trat-j trat The electrical vibrating unit was perfected with the cooperation of oC engineers of two large Eastern electrical companies This screen is used for tor the I I tion of f an any crystalline or granular material ma ma- In n wet or dry screening It ma-I ma operates op op- op I eates with a strong persistent up upward upward up- up ward and rotary movement t of the screen cloth Induced b by electric power applied from beneath The result is It a huge tonnage screened thoroughly at minimum ost oat for operation and maint main main- t |