Followed very shortly afterward with another device. I simply called this second one Type II . Swindon England, given to us in July of 1991, accurately describes the operational characteristics of both. The triangle means that all three objects are interconnected, the lines from these three objects converging in the center mean that these three interconnected objects are placed in the center. So now we have those three objects, interconnected, that rotate in the center.
Lets start at the bottom.
The curved lines emanating from the center denote both centrifugal forces and rotation. That means it utilizes centrifugal force. Upper right . It has a round configuration and is mounted upon a shaft. So now we know that this pictogram is of a device that 1.