H - Electricity – 05 – B
Patent
H - Electricity
05
B
315/21, 240/83
H05B 37/00 (2006.01) A47G 33/08 (2006.01) F21S 4/00 (2006.01) H05B 37/02 (2006.01) H05B 39/00 (2006.01) H05B 41/00 (2006.01)
Patent
CA 1243727
Abstract of the Disclosure This invention relates to ornaments for installation in a string of lights and more particularly to ornaments which have lights and electrically energizable musical and/or motion produc- ing devices which cooperate to produce attractive sensory effects. Circuitry is provided for operating such devices in a safe and highly reliable manner, while being compact and readily and econo- mically manufacturable. In one embodiment, an enhanced visual effect is produced by a rotating element driven through a gear reduction unit from a small electric motor. In another embodi- ment, a music module is provided which includes a small speaker energized from an integrated circuit which generates musical tones. In an ornament constructed in accordance with the invention, connectors are provided to connect input terminals of a bridge rectifier in a string of lamps while a lamp of the ornament is connected in series with a load device and to output terminals of the bridge rectifier, with protection means being provided for limiting voltages across the lamp and the load device, and to thereby protect against possible highly adverse consequences of open circuit conditions. The connection of the lamp in the output circuit of the rectifier, in series with the load device, rather than in series with the input of the rectifier, is advantageous in connection with limiting voltages in the circuit and in permitting use of a lamp which does not need to match the lamps of the string. Preferably, the voltage across the lamp is limited by a single Zener diode, only one diode being required since the cur- rent is unidirectional in the output circuit of the rectifier. The Zener diode across the lamp provides additional protection against burn-out and extends the life of the lamp, to provide further protection against open-circuit conditions.
485086
Flynn Charles J.
Sanders Robert E.
Vertreese John L.
Hallmark Cards Inc.
Smart & Biggar
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