Antique GE 12 Pancake Motor Fan, Swivel-Trunnion, Motor Patent 1890, Runs Great. This is a very nice GE Pancake motor fan. The latest patent number listed is 1890. The motor is set on a swivel-trunnion base. There is no “notched clamp” on the trunnion where the brass wing bolts are tightened. Overall the unit is…