Postman mechanism

These two black & white photos reveal the gear mechanism for animating the Postman. Dick Kraus built this mechanism entirely out of a junk pile of old parts he found around the park. The only component that was new was the motor to make the whole thing run. Notice the hand that points towards you as you look at the photo on the left. At the very bottom of that photo are the fingertips of the postman's other hand. The photo on the right is a reverse angle, and both hands are visible, although a bit obscured.