Electric lamp and discharge devices: systems – Plural series connected load devices – Christmas lights
Reexamination Certificate
2000-03-23
2001-02-06
Vu, David (Department: 2821)
Electric lamp and discharge devices: systems
Plural series connected load devices
Christmas lights
C362S123000, C362S806000
Reexamination Certificate
active
06184629
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a Christmas lamp, and particularly to a knitting structure of power-supply wires in ornamental lamp.
2. Description of the Prior Art
In the conventional lamp strings for Christmas ornament, the ornament usually comprises an independent power-supply wire connected, in series, with a plurality of sockets, and the last socket on the tail end thereof is connected with an independent wire. Two independent power-supply wires are then twisted together to form into a lamp string; all the sockets in one lamp string are mounted with bulbs respectively so as to form into a lamp string for Christmas ornament.
The conventional lamp string for Christmas ornament can also be mounted on a wall surface or a wide plane; as shown in
FIG. 10
, a plurality of lamp strings are connected with and under a main power-supply cable. The two independent power-supply wires of every lamp string are not twisted; the sockets of two adjacent lamp strings are arranged in intersection shape. The independent power-supply wire of one lamp string and the sockets of another lamp string are held together by means of a clasper so as to knit all the lamps into a network of ornament; the aforesaid prior art is published in U.S. Pat. No. 5,775,802; the independent power-supply wires of the prior art are hung under the main power-supply cable; the number of strands of the power-supply wire and the diameter thereof have been increased properly so as to withstand pulling unintentionally.
In another conventional network of ornamental lamp strings as shown in
FIG. 11
, it comprises a plurality of twisted lamp strings to be connected with a main power-supply cable; all the lamp strings are hung under the main power-supply, and the sockets of two adjacent lamp strings are arranged in intersection shape, and then the sockets of one lamp string and the power-supply wire of an adjacent lamp string are fastened together by means of claspers so as to form into a network of ornamental lamp strings; finally, a socket on the tail end of every two adjacent lamp strings will be unable to hold stably as a result of the intersection arrangement, and that socket is subject to swaying in the wind.
SUMMARY OF THE INVENTION
The prime object of the present invention is to provide a knitting structure of power-supply wires in ornamental lamp, in which every lamp string includes a plurality of sockets connected in series by means of a plurality of short power-supply wires, and then the lamp string is twisted together with a knitting cord without copper wire to form into an elongate lamp string; a plurality of lamp strings can be knitted into an ornamental lamp as desired so as to save the use of copper wire which is usually used as power-supply wire.
Another object of the present invention is to provide a knitting structure of power-supply wires in ornamental lamp, in which a loop type of ornamental lamp is knitted by using a plurality of short power-supply wires to connect in series, from the first socket to the second socket respectively and so on, almost simultaneously a knitting cord without copper wire is used to twist the lamp string together to form into a lamp string assembly; then, the last socket thereof is connected with a main power-supply wire and a plug so as to provide a lamp string having a better tensile strength, of which the knitting method is the same as that of the conventional lamp string, and it can be knitted simply and conveniently.
Still another object of the present invention is to provide a knitting structure of power-supply wires in ornamental lamp, in which the short power-supply wires connected in series between every two sockets form into a single-wire lamp string, which is then twisted together with a knitting cord to form into a lamp string assembly; since the lamp string assembly includes a knitting cord without copper wire, it will have a better tensile strength.
A further object of the present invention is to provide a knitting structure of power-supply wires in ornamental lamp, in which the lamp strings twisted with the knitting cords are separated and hung down; a knitting cord without copper wire is used to connect two adjacent lamp strings with a cross-connecting method so as to form into a lamp net; then, several lamp strings may be knitted in parallel to form into a large ornamental lamp net.
A still further object of the present invention is to provide a knitting structure of power-supply wires in ornamental lamp, in which every two adjacent sockets in each lamp string are connected in series with a short power-supply wire, and then a knitting cord without copper wire is used to twist the lamp string to form into an elongate lamp string; an independent power-supply wire is connected with the last socket of the lamp string so as to form into an elongate lamp string. Before the length of the independent power-supply wire is determined, the lamp string can be used to knit into a large lamp string, such as an ornamental lamp net or an ornamental screen light.
REFERENCES:
patent: 4870547 (1989-09-01), Crucefix
patent: 5775802 (1998-07-01), Kuo
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