Note: Descriptions are shown in the official language in which they were submitted.
~1~'~~5~
ELECTRIC LAMP BASE SYSTEM
BACKGROUND OF THE INVENTION
A conventional electric lamp base system shown in
FIGS. 5 and 6 includes a cylindrical socket 10, two
conductors 20, 30, and a cap 40 combined together. The
socket 10 has a threaded portion 101 in an inner wall
for screwing with a lamp. One of two conductor 20 is
vertically fixed on an inner wall of the socket 10
having a pointed lower end 201, and the other conductor
30 is fixed laterally on a bottom of the socket 10,
having a pointed projection 301 from one end. Two lead
wires 50 are deposited laterally through under the
bottom of the socket 10, and the pointed ends 201, 301
of the two conductors 20, 30 prick in the two lead wires
to conduct electricity. The cap 40 has a projecting-up
portion 401 to fit in a center hole 103 in the bottom of
the socket 10 and to press up tightly the two lead wires
50 when the cap 40 is fixed to close on the bottom of
the socket 10 from under. When this system is in
manufacturing process, one end of the conductor 30 is
bent down to contact one pole of the lamp. But the two
conductors 20, 30 are often found to be in contact with
each other to cause short-circuit made by careless or
erroneous work of workers, and thus causing probable
fire.
1
SUMMARY OF THE INVENTION 21 2 7 6 5 2
An electric lamp base system in the present invention includes a
conductor fitted in an inner wall of a cylindrical socket and contacting with
a
circumferential threaded portion of a lamp and its bottom and inserting in a
lead
wire to conduct electricity, and another conductor fitted straight in a hole
in a
bottom of the socket and having its upper end bent to contact with a bottom
end of
a lamp and its bottom end inserting in another lead wire to conduct
electricity. The
two lead wires are put through a straight horizontal groove in the bottom of
the
socket and pressed firmly by a diametrical straight portion on the bottom of a
cap
closed on the bottom of the socket from under. Consequently, the two
conductors
are located far from each other, without the possibility of mutual contact
causing a
short-circuit.
According to an aspect of the invention, there is provided an electric
lamp socket assembly for receiving an exteriorly threaded light bulb having a
central longitudinal axis and providing electrical coupling to a pair of lead
wires,
comprising:
a longitudinally directed cylindrically contoured wall member, said
wall member having an interiorly threaded surface to matingly receive said
exteriorly threaded light bulb, said wall member having a longitudinally
extended
groove formed in said interiorly threaded surface;
a substantially flat longitudinally directed first conductor disposed
within said longitudinally extended groove, said first conductor having at its
lower
end a piercing tab for contact with a first one of said pair of lead wires at
a
location displaced from said central axis;
a generally circularly contoured bottom platform positioned adjacent
a lower end of said wall member and mounted at an interior perimeter thereof,
said bottom platform having a transversely extending groove formed in a lower
surface thereof for receipt of said lead wires therein, said lead wires
extending
2
21 27652
through diametrically opposed slots formed in said lower end of said wall
member,
said bottom platform having a longitudinally directed opening formed
therethrough
adjacent said central axis of said light bulb;
a second conductor extending through said through opening of said
bottom platform and having an upper bent tabbed end and a lower end formed
with a piercing tab for contacting a second one of said pair of lead wires,
said
upper bent tabbed end being bent substantially at a right angle adjacent an
upper
surface of said bottom platform for extension through said central axis for
defining
a linearly directed conductor for contacting a bottom-end conductor of the
light
l0 bulb; and
a circularly contoured bottom cap member having an upper surface
for mating with said lower end of said wall member, said bottom cap member
including a diametrically extended raised rib portion and two opposing
longitudinally directed retaining members formed on said upper surface
thereof,
said diametrically extended raised rib portion presses said lead wires
upwardly
and securely into said transversely extended groove of said bottom platform
and
into electrical contact with said piercing tabs of said first and second
conductors,
said opposing vertically directed retaining members being received through
respective openings formed in said bottom platform to lockingly engage said
bottom platform.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood by reference to the
accompanying drawings, wherein:
FIG. 1 is a perspective view of an electric lamp base system in the
present invention;
FIG. 2 is a front cross-sectional view of the electric lamp base
system in the present invention;
Za
21 27652
FIG. 3 is a side cross-sectional viev~r of the electric lamp base
system in the present invention;
2b
2127652
FIG. 4 is an upper view of the electric lamp base
system in the present invention;
FIG. 5 is a perspective view of a conventional
electric lamp base system; and,
FIG. 6 is an upper view of the conventional
electric lamp base system.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
An electric lamp base system in the present
invention, as shown in FIGS. 2 and 3, includes a socket
1, two conductors, a cap 4 combined together. The
socket is provided with a threaded portion 11 for a
threaded part 51 of a lamp 5 to screw with, a straight
groove 12 and a position groove 121 extending laterally
to both sides from the straight groove 12 in an inner
wall for a conductor 2 to engage therein to be firmly
positioned as shown in FIG. 4. Moreover, a projection
21 on the proper side of the conductor 2 is disposed to
accurately contact with the threaded part 51 of the lamp
5. A through hole 13 is also provided in a bottom of
the socket 1, preferably in its center, for a rather
short conductor 3 to engage therein. The two conductors
2 and 3 have respectively a lower end 22, 31 to insert
in two lead wires 6, 6. The socket 1 also has a
straight horizontal groove 14 in the bottom for two lead
wires 6, 6 to pass through therein, and a center hole 15
in the bottom portion for two upright walls 41 of a cap
3
.. 2~ 2~s 52
4 to fit therein. The cap 4 has a diametrical straight
projection 42 on an upper surface to press the two lead
wires 6, 6 firmly, keeping the wires 6, 6 in place.
In assembling, as shown in FIGS. 2 and 3, the two
conductors 2 and 3 are respectively deposited in the
straight groove 12, and the hole 13 of the socket 1.
Then the two lead wires 6, 6 are inserted through the
straight groove 14, and the projecting-up walls 41 of
the cap 4 are put to fit in the center hole 15 and the
diametrical projection 42 therecf fitt~.ng in the center
hole 15 to press up the two lead wires 6, 6 in its
position. After that the lower ends 22, 31 of the
conductors 2 and 3 are inserted in the two lead wires 6,
6 for conducting electricity.
As seen from the above description, the two
conductors a:. and 3 are provided to be iccated in auch
positions that they cannot contact with each other by
any means, never causing short-circuit, and besides,
their length can be made as short as possible to lower
the cost and the prevent short-circuit caused by mutual
contact.
While the preferred embodiments of the invention
have been described above, it will be recognized and
understood that various modifications may be made
therein and the appended claims are intended to cover
all such modifications which may fall within the spirit
and scope of the invention.
4
