Abstract: A single fluke anchor for ships, structures built floating on or in the water, buoys, fishing nets and the like comprising a fluke formed integral to a shank, a stabilizer located behind the fluke and formed integral with the fluke and perpendicular to the shank, and triggers arranged integral to the both sides of the curved portion of the shank, whereby big holding power can be provided together with operation easiness.

Abstract: A heavy-duty chain link which constitutes a chain for use with vessels and the like. The link is fitted with a stud across the center thereof, which tends to prevent stretching and kinking of the link. Heat sources such as electron beams and plasma arcs fusion weld the abutting of two ends of the link, and the stud is wedged at at least one of its ends to said link by means of roots of weld beads provided by the heat sources. Such wedges lie at a right angle with the axis of the link for most effectively preventing the stretching and kinking of the link when it is subjected to a heavy load. A method of making this kind of stud chain link is disclosed also.

Abstract: A thin heat-treated steel sheet material having marginal zones formed along four edges thereof is photo-etched to produce printing types and the like which are integral with the sheet material. The reverse side thereof is also slightly photo-etched for removing and equalizing the strains on both side surfaces of the sheet. The transverse marginal zones are utilized for successive welding and trimming operations. The welding of the longitudinal edges of the sheet material for making the material into an endless form and its temper is made by subjecting said edges to primary and secondary electron beams.