Paper: Vibration Problems In Oil Wells

The dynagraph animater is a device whereby we reproduce in miniature what happens at the pump as disclosed by the dynagraph. Guided by the dynagraph, we construct charts upon a cylindrical surface so that when viewed, while, rotating, through a fixed slot the motion of the rod system of the well and the pump action become animated - that is, they come to life and move, though on a reduced scale, quite as in the actual pumping well. Even blind men say, "I see" - meaning "I understand" - and so the animater was devised to aid the imagination in comprehending the complicated behavior of the enormous rod system and clarify our thinking on difficult problems.