They Invented What? (No. 176)

U.S. Pat. No. 4,170,357:  Golf club.

I claim:

1. In an athletic club having a shaft portion extending between a handle portion and a head portion which includes a ball-striking face, the improvement wherein said head portion comprises:
          propulsion means including a charge receiving means for holding and positioning a propellant charge such that when said charge is detonated, said heat portion is accelerated in the direction of said ball-striking face; and
           means for detonating a propellant charge held by said charge receiving means, when said ball-striking face comes into contact with a ball, to accelerate said head portion toward said ball.