Lamp socket

A socket assembly including a hollow socket housing into which a lamp can be inserted and a set of contacts affixed within the socket housing. The single-piece housing of a yieldable material is adapted for connection to an electric cord. The socket assembly includes a hinge member for urging against the electric cord with the hinge member having opposed outwardly extending ears that help assist in retaining the electric cord in place.

BACKGROUND OF THE INVENTION 
The present invention relates in general to lamp socket assemblies, and 
more particular, to a socket assembly for a lamp or bulb capable of 
connection to a two-conductor cord in a manner to provide an electrical 
connection between the bulb and the cord. 
In one form a socket assembly may be constructed of two pieces including a 
lamp receiving piece and a mating cap piece. A recess is sometimes formed 
in the lamp-receiving piece, thereby defining a channel which is adapted 
to receive a two conductor wire. Projecting into the slot or recess in the 
lamp-receiving piece are prongs or contacts which are adapted to penetrate 
the insulation of the wire when the wire is located within the recess, and 
the cap piece is snapped into place. One drawback associated with this 
structure particularly as it pertains to the assembly of the socket 
assembly to the wires is that the process is time consuming and costly. 
This is particularly so when a plurality of such socket assemblies have to 
be attached to a two-wire conductor for use, for example, as Christmas 
lights or for other lighting purposes. 
A two-piece socket assembly also requires two separate molding operations. 
Some socket assemblies are constructed so that the cap section can be 
inserted in two ways, only one of which is correct. This places a burden 
upon the assembler to recognize the correct procedure and tends to 
increase the cost of the end-product. 
Other more recent prior art includes my earlier U.S. Pat. No. 3,594,705 on 
a lamp socket which includes a single-piece housing employing an integral 
hinge adapted to provide positive engagement for securing a two wire 
assembly in a channel in the lamp socket. The structure described in U.S. 
Pat. No. 3,594,705 represented a substantial advance in the art providing 
a much more simplified socket arrangement and one that enabled proved 
assembly thereof to the electric cord. However, In some instances, if the 
electric cord was twisted, there tended to be a breaking of contact 
between the conductor in the electric cord and the contacts associated 
with the socket. 
Accordingly, it is an object of the present invention to provide an 
improvement in a single-piece lamp socket, whereby the contact between the 
electric cord and the socket contacts is more positive and not prone to at 
least periodic disconnection. This tended to cause a flickering effect at 
the lamp socket bulb. 
A further object of the present invention is to provide a simple, integral, 
fool-proof, one-piece lamp socket assembly for connection to a two-wire 
conductor or electric cord. 
SUMMARY OF THE INVENTION 
To accomplish the foregoing and other objects, features and advantages of 
the invention, there is provided a lamp socket assembly for holding a bulb 
and for attachment to a pair of current-carrying wires typically referred 
to as an electric cord having insulation on these wires. The lamp socket 
assembly comprises a one-piece housing member including a hollowed part 
having means engageable with the base of the light bulb when the ladder is 
advanced into the member from one end thereof. The housing member has wall 
portions at the other end thereof defining a recess for receiving a 
section of current-carrying wires. The housing member further includes a 
hingeable cap portion having a wire contacting portion movable into 
engaging relationship with the wire in the recess, in a hinge part 
integrally formed with the cap portion for pivoting the cap portion and 
hollowed part to and away from one another along with a pair of electrical 
contacts. In accordance with the invention, the cap portion supported by 
the hinge has associated therewith oppositely and outwardly directed ears 
that are adapted to engage the current carrying wires for providing 
additional outwardly directed support to maintain the current carrying 
wires in a position of an enhanced securement in the channel thus 
preventing intermittent disconnection at the contacts.

DETAILED DESCRIPTION 
Lamp socket assembly 10 is shown in FIGS. 1-5. FIG. 1 illustrates it in a 
perspective view, FIG. 2 illustrates it in an opposite side elevation 
view, FIG. 3 illustrates it in a second side elevation view toward the 
hinge and FIG. 4 illustrates it in a top view. The lamp socket assembly 10 
generally comprises a one-piece socket housing 12 having a lamp receiving 
part 14 and a cap portion 18. The socket assembly 10 also includes a set 
of contacts 19 and 22 held within socket assembly 12, as shown in FIGS. 1 
and 2. FIG. 1 also shows the clip 11 which is integrally formed as part of 
socket housing 12. The clip 11 is adapted to facilitate connection of the 
socket assembly to an article such as a nail or tree branch. 
The lamp receiving part 14 is formed with projecting wall portions 20, 21. 
Wall portion 20 has a recess 20A formed in one face. Cap portion 18 has a 
face with a projecting flange 18A shaped to mate with the recess 20A and 
wall portion 20. Hinging portion 16 is integrally formed between cap 
portion 18 and wall portion 21. The hinge portion 16 is constructed of a 
relatively thin plastic material so as to provide proper flexibility in 
hinging action. 
Inside of the hinge portion 16, when the hinge is closed, a portion thereof 
is adapted to fit against the abutting wall 17. The wall 17 also provides 
a part of the channel that receives the electric cord. 
In FIG. 1 the socket is shown with its hinge in its open position. In FIG. 
2 the hinge is shown in its closed position, in which case the mating 
faces are fixedly interlocked as indicated. In this connection, it is also 
noted that the recess 20A is formed at least in part by the ridge 20B. 
This ridge is useful in assisting in the closing of the hinge part and at 
the same time forms one side of the interlocking recess. 
In FIG. 1 there are no electrical cords or wires shown so that there is 
illustrated piercing tab 23 and positioning tab 24 of one of the contacts 
as positioned in the socket housing 12. Both of the contacts are inserted 
into a slip provided during the molding operation. The contacts are 
inserted in the slot. The contact 19 has a turned bottom adapted for 
contact with the bottom of the bulb, while the contact 22 is dispased on 
the side of the hollow bulb receiving portion of the housing. When a 
two-conductor wire is placed in the recess 15 and cap lock 18 is forced 
down into an interlock position, one of the wires is pierced by piercing 
tab 23 and an electrical contact is formed between the pierced wire and 
the associated contact. A second contact positioned on the other side 
provides contact for the second wire. The piercing parts of each contact 
are offset so that one contacts one wire of the two-wire conductor while 
the other one contacts the other wire. With regard to the channel 15, it 
is noted that this is provided between the wall portion 20 and the wall 
17. 
The drawing also illustrate the lamp socket assembly as having a hollow 
socket for receiving the bulb. The bulb may be threaded into the socket 
and in this regard, threading may be carried out by means of dimples 
provided on the contact 22, as illustrated. Of course, other means may be 
provided for securing the bulb in the lamp socket. 
In accordance with the invention, there is associated with the cap portion 
18, a pair of oppositely disposed ears, 30 and 32. As illustrated in the 
drawings, these ears extend outwardly from the body of the cap portion on 
either side and when the cap portion is in its interlocked position, these 
outwardly extending ears extend along and in the direction of the 
conductor wires 26. It is noted that these outwardly disposed ears extend 
beyond the contacts so as to provide support outside of the contacts, so 
that even if the current carrying wires should be twisted outside of the 
socket, there is a securing action by virtue of the ears to maintain 
proper contact between the contacts and the conductor wires. It is noted 
that the outer extent of the ears correspond substantially with the outer 
diameter of the housing 12. It is also noted that on the housing 12, 
outside of the contacts, there is provided a support surface also for the 
electrical current carrying wire. Thus, there is actually a gripping 
action by virtue of the interaction between the ears and the housing top 
ledge. The conductor wires once in place essentially provide a securing 
means outside of the place where the contacts pierce the wires. In 
accordance with the invention the hinge interlock is of the improved type 
in which the interlocking recess is of wedge shape to correspond with the 
wedged interlocking tab on the hinge part. This provides for a positive 
form of interlocking in the interlocked position of the socket. 
Having now described a limited number of embodiments of the present 
invention, it should now be apparent to those skilled in the art that 
numerous other embodiments and modifications thereof are contemplated as 
falling within the scope of the present invention as defined by the 
appended claims.