| 摘要 |
<p>A series-parallel lighting string having a cord with three wires separated by insulation and a series of cutouts severing the center wire of the cord, and lampholders positioned at each of the cutouts to hold a miniature push-in type light bulb. Each of the lampholders has a pair of contact plates between which a bulb is inserted with its lead wires in contact with the plates. The contact plates are positioned within a husk of the lampholder, and the husk has a snap-fitting cap hingedly attached thereto to define a wireway. The wireway is formed by corresponding semicircular grooves in each of the husk and the cap sized to receive the cord. Each of the contact plates has an insulation-piercing contact finger positioned to engage one of the end portions of the severed wire to each side of the cutout in the cord. The first and last lampholders in each series set has a second cord-piercing contact finger which contacts one or the other of the outer non-severed wires. The cap has an insulating divider which projects through the cutout to keep the severed end portions of the central wire separated. The center contact fingers of the pair of contact plates for a lampholder bridge the cutout. For the first and last lampholders, the other contact finger of the outer plate makes contact with one of the non-severed wires to provide a plurality of series sets of lampholders connected in parallel.</p> |
