Abstract: A golf putter provided with co-linear reference mark portions to facilitate use of the putter for accurate plumb lining, the mark portions being disposed at a predetermined location along the club shaft such that the lines and the longitudinal centerline of the shaft line in a vertical plane when the putter is held at the extending end of its handle for plumb lining, whereby the club shaft will appear as a vertical plumb line when viewed from a position from which the reference mark portions appear at substantially the circumferential center of the visible portion of the shaft.

Abstract: A low-cost folding binocular which may be collapsed to a relatively thin package. The foldable binocular includes a laminated synthetic plastic, pressed paper or cardboard case provided with synthetic plastic objective and eyepiece lenses. The focus adjustment is effected by longitudinal folding of the case along the same fold lines which permit the case to be collapsed. No gluing is necessary.

Abstract: A conveyor transports fish along a path past a fish sex detector. A rotating fish-engaging member is mounted downstream of the detector above the path. According to the sex of a fish as detected by the detector, the rotating fish-engaging member is either shifted downward to kick the fish off the conveyor or held away from the conveyor out of engagement with the fish so that it continues to be transported downstream by the conveyor.