U.S. patent number 3,866,034 [Application Number 05/437,426] was granted by the patent office on 1975-02-11 for post cap lamp.
Invention is credited to Michael T. Russo.
United States Patent |
3,866,034 |
Russo |
February 11, 1975 |
POST CAP LAMP
Abstract
A molded plastic cap, for a fence-type post, formed of a hollow
body having a downwardly opening post socket formed integral with
the lower end thereof. The socket is shaped to snugly receive the
upper end of a post for mounting the cap thereon. The upper end of
the socket extends a short distance upwardly, within the body, and
is closed by a horizontal wall having a central opening. An
electrical bulb receiving socket is positioned within the post
socket, with its upper end abutting said wall. A lamp bulb arranged
within the body, above the upper surface of the wall, has a base
extending through the wall opening and threadedly engaged with the
bulb socket to secure the bulb socket within the cap. Vertically
extending, inwardly opening channels are formed on opposing side
walls of the post socket and electrical wire is arranged within
each channel and connected to the bulb socket base portion, so that
the bulb socket is held against turning or twisting within the post
socket by means of the wires engaged within the channels, as well
as by the upper end of the post abutting the lower end of the bulb
socket.
Inventors: |
Russo; Michael T. (Bloomfield
Hills, MI) |
Family
ID: |
23736405 |
Appl.
No.: |
05/437,426 |
Filed: |
January 28, 1974 |
Current U.S.
Class: |
362/152;
362/431 |
Current CPC
Class: |
F21V
21/0824 (20130101); F21V 21/116 (20130101); F21S
8/081 (20130101); F21V 17/06 (20130101); F21V
3/00 (20130101); F21W 2121/00 (20130101); F21V
33/006 (20130101); F21W 2111/00 (20130101); F21W
2131/109 (20130101); F21W 2111/023 (20130101) |
Current International
Class: |
F21V
21/10 (20060101); F21V 21/116 (20060101); F21v
033/00 () |
Field of
Search: |
;240/2B,1R,1T,84,100,6.42,153 ;248/187 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Matthews; Samuel S.
Assistant Examiner: Mathews; Alan
Attorney, Agent or Firm: Cullen, Settle, Sloman &
Cantor
Claims
Having fully described an operative embodiment of this invention, I
now claim:
1. A cap lamp for mounting upon the upper end of a post,
comprising:
a thin wall hollow body of a light transmitting plastic
material;
a downwardly opening post socket formed integral with the lower end
of the body and being of a size to snugly receive the upper end of
a post for mounting the cap upon the post;
a wall substantially closing off the upper end of the socket, and a
central opening formed in said wall;
an electrical bulb-receiving socket member located within the post
socket below said wall and having an upper bulb-receiving
receptacle positioned beneath said wall opening;
an electrical lightbulb arranged within the body, above said wall
and having a base extended downwardly through said opening and
releaseably engaged with said receptacle, for securing the
bulb-receiving socket member within the post socket; and
a vertically extending inwardly opening channel formed within a
generally vertical inner wall surface of the post socket and
extending the height thereof, said electrical bulb-receiving socket
member having a generally vertical surface closely adjacent said
post socket vertical surface, and a relatively stiff, electrical
wire extending from the bulb-receiving socket member vertical
surface and projecting immediately into and extending along said
channel for holding said bulb-receiving socket against turning and
twisting relative to the post socket, said wire further extending
from the lower end of the post socket for connection to an
electrical power source, for thereby carrying the electrical power
to the bulb.
2. A cap lamp as defined in claim 1, and including a second
inwardly opening channel formed within the inner wall surface of
the post socket, opposite to said first mentioned channel and said
electrical wire having a portion connected to and extending from
the bulb socket means and arranged within said second channel and
extending downwardly and outwardly of the post socket for
connection to additional similar cap lamps, and for likewise
holding the bulb socket means against turning and twisting within
the post socket.
3. A cap lamp as defined in claim 1, and wherein the upper end of
said post socket extends upwardly within the hollow body so that
said wall is located a short distance above the lower end of the
hollow body for thereby positioning the bulb well within the hollow
body and roughly near the center thereof.
4. A cap lamp as defined in claim 1 and said hollow body being
approximately sperhical in shape and being formed in two
approximately hemispherical parts, namely, a lower part with which
said post socket is integrally formed, and an upper, removable part
whose free edge is formed to releasably engage with the upper free
edge of the lower part.
5. A cap lamp as defined in claim 4 above, and said post socket
being in the form of a thin wall, uniform, roughly rectangular
cross-sectional shaped tube whose upper end portion is formed
integral with said lower part and whose lower end portion is open
to receive and frictionally hold the upper end of the post whose
upper end portion is formed to correspondingly engage within said
post socket.
6. A cap lamp as defined in claim 1 in combination with a post, the
post having an upper end portion inserted within the post socket
and abutting against a lower end of the electrical bulb-receiving
socket to retain the electrical bulb-receiving socket within the
post socket against axial displacement.
Description
BACKGROUND OF THE INVENTION
Chain link fences formed of a single strand of link chain supported
by spaced apart vertical posts are frequently used for decorative
purposes or to bound areas, such as walkways, etc. Decorative caps
may be applied to the upper ends of the posts for visual
improvement. Where such type fences are used for walkways or
driveways or the like, it would be desirable to provide suitable
lighting for better nighttime visibility.
Thus, the invention herein relates to forming the decorative caps
in such a manner, that they may also function as lamps, so that
each post may be lit up when desired. Thus, the lamps are
integrated with the chain link support posts.
While outdoor post mounted lamps of various types are conventional,
the construction herein is concerned with inexpensive, plastic
molded parts which fit and lock together simply and may be easily
taken apart, without tools, since such type chain link fences,
particularly where used for decorative or demarkation purposes at
golf courses, driveways and similar places, must be easily movable
so as not to interfere with ground maintenance, as for example
mowing grass.
SUMMARY OF INVENTION
The invention herein contemplats a decorative cap for mounting upon
a post supporting a strand of link chain, which cap is made of a
molded plastic, hollow body portion through which light may be
transmitted, with the lower end of the body provided with a socket
for receiving the upper end of the post. Contained within the
socket is a conventional electrical lamp bulb socket which is held
within the post first, by the bulb which is positioned within the
hollow body and whose base extends through a wall portion of the
post socket to engage and connect with the bulb socket, and
secondly, by the upper end of the post engaging the lower end of
the bulb socket, and thirdly by the electrical connecting wire,
which carries current to the bulb socket, engaged within integral
channels formed within the post socket. Thus, the hollow body,
which is preferably formed in two parts so that it may be opened
for access to the bulb, the electrical bulb and the electrical bulb
socket may all be handled as separate parts and quickly assembled
or disassembled without the use of tools, and yet will form a
sturdy integrated lamp construction.
Thus, an object of this invention is to provide an inexpensive lamp
in the form of a decorative cap for application to the uper end of
a fence post, which is formed of a number of separate pieces which
may be easily assembled or disassembled as desired, without tools,
and yet will be weather tight and durable for outdoor use.
These and other objects and advantages of this invention will
become aparent upon reading the following description, of which the
attached drawings form a part.
DESCRIPTION OF DRAWINGS
FIG. 1 is a perspective view of a decorative chain link fence
incorporating the post cap lamps.
FIG. 2 is an enlarged, perspective view, of a post with a cap
mounted thereon and a connecting chain (shown in dotted line).
FIG. 3 is a top plan view of the lower part of the cap body, taken
in the direction of arrows 3--3 of FIG. 4.
FIG. 4 is a cross-sectional elevational view of the cap mounted
upon the upper end of a post.
FIG. 5 is a bottom view taken in the direction of arrows 5--5 of
FIG. 4.
FIG. 6 is a cross-sectional view of the parts shown
disassembled.
FIG. 7 is a perspective view of the upper end of a post, and
FIG. 8 is a perspective view of the electrical bulb receiving
socket.
DETAILED DESCRIPTION
FIG. 1 illustrates a chain link fence 10 formed of a single strand
of link chain 11 supported by post 12. Preferably, the link chain
is of molded plastic as are the posts. Although the shape of the
post may vary, by way of example, the posts are illustrated as
being each H-shaped in cross-section with a central web 13 and side
flanges 14 making up the H-shape. The lower end of the web is
extended to form a pointed spike 15 for penetration into the ground
G. A central flange 16 is formed integral with the opposite faces
of the web 13. Preferably, the central flange is tapered from the
lower point upwardly and then back downwardly into the plane of the
web. The upper end of the post is provided with a slot 17 for
receiving a link of the chain.
Removably mounted upon the top of the post is a cap 20, illustrated
as being spherical in shape with a lower hemispherical body part 21
and an upper hemispherical part 22 having a rim 23 overlapping and
receiving the upper free edge of the lower part for frictionally
retaining the two parts together.
The lower body part 21 is formed with an integral post receiving
socket 25 which extends below the body part as well as upwardly
into the interior of the body part where it is closed off by a
horizontal wall 26 having a central hole 27. The post receiving
socket 25 is also formed with channels 28 on opposite walls of the
approximately rectangular shaped in cross-section socket, which
channels extend the full height of the socket.
Loosely fitted within the post receiving socket 25 is a
conventional electrical bulb receiving socket member 30 having a
base portion 31 to which are connected wires 32 for providing
electrical power as well as for interconnecting the bulb sockets of
each of the various caps. That is, the wire extends from one cap to
the next and then is plugged into an electrical outlet.
The wire 32 on each side of the socket member 30, is arranged
within the channels or grooves 28 in the post sockets, and being
relatively stiff holds the bulb receiving socket member against
twisting or turning within the post socket when the electrical lamp
bulb 33 is inserted through the hole 27 in the wall 26 and its
threaded bulb base 34 is threadedly engaged within the threaded
receptacle 35 in the bulb-receiving socket. Once the bulb is
threaded tightly into place, it holds the bulb receiving socket
against removal from the post socket. When it is desired to remove
the electrical bulb or to disassemble the unit, the electrical bulb
33 may be unthreaded from the receptacle, with the electrical wires
32, which have sufficient stiffness, holding the bulb socket
against turning or twisting.
The post socket is of a cross-sectional size to snugly receive the
upper end of the post. Due to the slot 17 in the web 13, the post
upper end is resilient so as to permit squeezing and resilient
expansion within the post socket for tightly frictionally holding
it in place. Since the cap covers the upper end of the post slot
17, it keeps the chain 11 therein and conversely, must be removed
for removal of the chain from the post.
As can be seen, the caps may be utilized without the electrical
wire connetions and bulbs and bulb sockets, merely as decorative
caps as well as to provide the function of holding the chains
within the upper ends of the post slots. When it is desired to
provide lights in conjunction with the use of such a fence, the
electrical sockets 30, which may be premounted in spaced
relationship upon the wire 32, may be placed into the caps and then
locked in plce by insertion of the bulbs and utilized for as long
as desired. Conversely, they may be removed from the caps when not
needed. Thus, for such use as driveway markers, the electrical
lighting can be provided when needed and removed when not
necessary.
The shapes of the posts and of the caps may be varied for different
decorative effect. However, preferably they are made of molded
plastic and the cap body portion must be of a material which is
transparent or transluscent to light.
* * * * *