Abstract: A gemstone setting is provided having channels into which grooved gemstones are snapped and secured. Each channel is provided with opposing, flexible prong members extending from the base of the gemstone setting. As the grooved gemstones are snapped into the channels, the prong members flex outwardly as the gemstones are pushed downwardly into the channels, such prong members snapping into engagement with the grooves on the gemstones to securely hold the gemstones within such channels. When the channels of the gemstone setting have been filled with gemstones, the gemstone setting is rendered invisible.

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.

Abstract: A waterski simulator is provided comprising a platform constructed and arranged to hold one practice skier and to rotate 180.degree. about a first pivot point, a pivoting arm constructed and arranged to rotate about 180.degree. about a second pivot point, the pivoting arm and the platform pivoting towards each other, a handle means connected to and extending from the pivoting arm and a resisting means associated with the pivoting arm providing resistance to the rotation thereof, said resistance being overcomeable by a practicing skier, whereby the practicing skier stands on the platform facing the pivoting arm and holds the handle means thereof, alternatively pivoting the platform and the pivoting arm, thereby simulating the movements associated with waterskiing.

Abstract: An electronic tuner generates a pulse train signal from an analog signal transduced from vibrations on a selected one of several strings of a musical instrument. The pulse train signal has a plurality of successive pulses, each of the pulses having a pulse width which may vary between successive pulses. Two of the pulses have a longest pulse width of all pulses in the pulse string are identified. The tuner then computes a current fundamental frequency on the selected string as a function of a ratio between a numerical count of the pulses occurring between these two pulses, the count including one of these pulses, and a sum of the pulse width of each of the pulses included in the count. The two of the pulses have a longest pulse width of all pulses in the pulse string. A difference signal is developed as a function of a difference between the current fundamental frequency and a known in-tune frequency associated with the selected string being tuned.