Putter having circular level

Claim 1

An improved putter including a shaft having one end adapted to be held by a golfer, and a putter head fixed to the other end of the shaft, characterized by said putter head having: a front wall defining an elongate, generally planar, ballengaging face; a bottom wall having a convex arcuate lower surface from the toe to heel portion of the club head; said walls having an L-shaped cross-section in the central area of the putter head intermediate the ends thereof, without any material contiguous to the central area of the back side of the front wall and without any reinforcing flange at the top of the front wall; an enlargement at each end of the putter head above the bottom wall and behind the front wall to provide mass to the club head, each enlargement extending upwardly approximately to the top of the front wall; a shaft mounting block between said enlargements above the bottom wall and behind the front wall; the shaft being fixed to the shaft mounting block at a location so that the center of percussion is at the midpoint of the ball-engaging face; a circular level having a sensitivity in the range of about 100 to 240 minutes per one-tenth inch of movement, the circular level being operatively aligned with the ball-engaging face to indicate when the face lies at a pre-selected angle to the horizontal and with the shaft to indicate when the axis of the shaft is at a pre-selected angle to the vertical; and a rearwardly-extending support cantilevered rearwardly from the top of the front wall for holding the circular level at said alignment and for permanently mounting the circular level on the putter head behind the front wall adjacent the top thereof and midway between the ends of the putter head, and the support having a width substantially less than the length of the top of the front wall.