Abstract: A barrel lock with a hollow cylindrical barrel having a perforated disk attached to one end thereof, and an elongated annular insert mounted within the barrel and extending from both ends of the barrel to provide loops at each end of the barrel. Preferably one end of the insert has a shoulder to engage the disk to prevent the annular insert from passing fully through the disk and the barrel. The barrel lock includes a spring clasp that is adapted to pass through the loop at the disk end of the barrel and also to pass through the perforation in the disk into the interior of the barrel. The spring clasp also engages and locks with the edges of the disk perforation when fully inserted.

Abstract: An improved soldering machine for automatically soldering links of a chain is provided in which the links are disposed adjacent to one another and define link junctions where the improved soldering machine holds the chain in position to enable the link junctions to be soldered. A soldering device applies solder paste to the chain at the link junctions by feeding the solder paste through a hollow needle having a needle tip wherein the needle tip traverses a predetermined path and contacts the chain over a portion of that predetermined path. The improvement consists of a heater which traverses a cyclical path which is dependent upon the position of the needle tip and heats the solder applied to the chain over a portion of that cyclical path.