Abstract: An optical fiber connector assembly (70) includes a duplex clip (30) having two cavities (32) and two standard SC type connectors (10) side-by-side received therein wherein one connector (10) inter-mates with an optical emitter and the other connector inter-mates with an optical detector. A loop-back optical fiber (20) is generally positioned in the rear exterior of the duplex clip (30) with two distal ends of the fiber being respectively connected to the rear ends of the corresponding two connectors (10) inside such duplex clip. A back shield (40) fixedly encloses the duplex clip (30) from the back wherein such back shield (40) further includes a rearwardly projection hermetic portion whose shape conforms to the configuration of such loop-back fiber (20) for protection. Also, for protection, two caps (48) can be optionally respectively attached to the front portions of the connectors (10) extending forwardly from the clip (30).

Abstract: A clip (10) is composed of two halves (12). Each half (12) has a main plate (14) from which a left side wall (16) and a right side wall (18) extend vertically at two opposite side edges. Each side wall (16, 18) incorporates a corresponding auxiliary wall (26, 28), which is extending vertically from the main plate (14) approximate a central slot (20) in the main plate (14), to form a cavity (22, 24) therein. A rear wall (30) extending from the rear edge of the main plate vertically, has two generally semi-circular openings (32, 34) therein in alignment with such two cavities (22, 24), respectively. A stopper (36) is formed generally in alignment with the auxiliary wall (28) which is facing to the right wall (18). A catch (42) and a latch (38) are respectively on the right and the left walls (18, 16).

Abstract: A digital control circuit for controlling the illumination of a plurality of lamp bulbs to create a decorative light display. The circuit includes a rectifier for converting alternating current to direct current as power for the digital elements of the control circuit and for the lamp bulbs of the display. The display is formed by a plurality of strings of series connected lamp bulbs each of which strings is supplied d.c. power through individual SCRs. The control circuit includes two oscillators, two decoders and a carry-out control which generate two different sequences of output signals at two different frequencies. The two sequences of output signals from the control circuit are each applied through isolating diodes and individual trigger circuits to the gate electrodes of the SCRs, causing the SCRs to conduct and illuminate each of the strings of lamps in sequences corresponding to the sequences of control circuit output signals.