I just went to AskJeeves, Dr. Bill. I couldn't see how the pump drill worked, either, but several sites mentioned it. Frankly it looked to me like the way used to start a fire with sticks of wood and a string. After an admittedly brief search, the only ref. I could find to a Dazey was a butter churn.

EDIT: check this out, Dr. Bill!
http://www.wmuma.com/tracker/skills/fire/pumpdrill/pumpdrillAA.html