U.S. patent number 3,895,227 [Application Number 05/414,191] was granted by the patent office on 1975-07-15 for floodlight.
This patent grant is currently assigned to General Electric Company. Invention is credited to Omer E. Murray, Jerry R. Plemmons.
United States Patent |
3,895,227 |
Murray , et al. |
July 15, 1975 |
**Please see images for:
( Certificate of Correction ) ** |
Floodlight
Abstract
Floodlight includes an optical assembly and an electrical
ballast assembly detachably secured together by a pair of support
brackets connected to the respective assemblies. Electrical
connection between the assemblies is provided by a quick disconnect
device between the support brackets. A mounting trunnion is
adjustably secured to the ballast assembly support bracket.
Inventors: |
Murray; Omer E.
(Hendersonville, NC), Plemmons; Jerry R. (Asheville,
NC) |
Assignee: |
General Electric Company
(Pittsfield, MA)
|
Family
ID: |
23640349 |
Appl.
No.: |
05/414,191 |
Filed: |
November 9, 1973 |
Current U.S.
Class: |
362/294; 362/362;
362/264 |
Current CPC
Class: |
F21V
23/06 (20130101); F21V 23/026 (20130101); F21V
31/03 (20130101); F21W 2131/10 (20130101); F21V
21/30 (20130101); F21V 31/00 (20130101) |
Current International
Class: |
F21V
23/02 (20060101); F21S 005/00 () |
Field of
Search: |
;240/25,41R,41.55,41.6,44,44.2,52,61,73R,73BA,78R |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Matthews; Samuel S.
Assistant Examiner: Mathews; Alan
Attorney, Agent or Firm: Greenberg; Sidney
Claims
What we claim as new and desire to secure by Letters Patent of the
United States is:
1. A floodlight comprising, in combination, an optical assembly
comprising optical housing means having an open front end and a
rear end defining a longitudinal axis, means for mounting a light
source within said optical housing means for emitting light rays
through said open front end, an electrical ballast housing arranged
at the rear end of said optical housing means, and connecting means
for detachably electrically and mechanically interconnecting said
optical assembly and said ballast housing, said connecting means
comprising an elongated front bracket at the rear end of said
optical housing means extending transversely across said axis and
secured intermediate its ends to said optical assembly, an
elongated rear bracket secured intermediate its ends to said
ballast housing and extending across said axis along the length of
said front bracket, said brackets each having laterally spaced
opposite end portions in mating relation with one another,
fastening means removably securing said brackets together at said
mating end portions thereof, and co-acting separable electrical
plug means and electrical receptacle means mounted respectively on
said brackets for automatically making electrical connection
therebetween when said brackets are moved together in mating
relation, and for automatically breaking electrical connection
therebetween when said brackets are separated from one another.
2. A floodlight as defined in claim 1, said fastening means
comprising bolt means adjustably secured to one of said brackets,
the other of said brackets having aperture means at its opposite
end portions through which said bolt means may freely pass, and
latch means adjustably secured to said other bracket engaging sid
bolt means for holding said brackets in assembled condition.
3. A floodlight comprising, in combination, an optical assembly
comprising optical housing means having an open front end and a
rear end defining a longitudinal axis, means for mounting a light
source within said optical housing means for emitting light rays
through said open front end, an electrical ballast housing arranged
at the rear end of said optical housing means, and connecting means
for detachably electrically and mechanically interconnecting said
optical assembly and said ballast housing, said connecting means
comprising an elongated front bracket at the rear end of said
optical housing means extending transversely of said axis and
secured intermediate its ends to said optical assembly, an
elongated rear bracket secured intermediate its ends to said
ballast housing and extending along the length of said front
bracket, said brackets having opposite end portions in mating
relation with one another, fastening means removably securing said
brackets together at said mating end portions thereof, and
co-acting separable electrical plug means and electrical receptacle
means mounted respectively on said brackets for automatically
making electrical connection therebetween when said brackets are
moved together in mating relation, and for automatically breaking
electrical connection therebetween when said brackets are separated
from one another, said fastening means comprising bolt means
adjustably secured to one of said brackets, the other of said
brackets having aperture means at its opposite end portions through
which said bolt means may freely pass, and latch means adjustably
secured to said other bracket engaging said bolt means for holding
said brackets in assembled condition, said latch means comprising
an elongated latch member at each end of said other bracket and
having a slotted portion engaging said bolt means and being
pivotally secured to said other bracket for movement into and out
of latching engagement with said 18 means.
4. A floodlight comprising, in combination, an optical assembly
comprising optical housing means having an open front end and a
rear end defining a longitudinal axis, means for mounting a light
source within said optical housing means for emitting light rays
through said open front end, an electrical ballast housing arranged
at the rear end of said optical housing means, and connecting means
for detachably electrically and mechanically interconnecting said
optical asssembly and said ballast housing, said connecting means
comprising an elongated front bracket at the rear end of said
optical housing means extending transversely of said axis and
secured intermediate its ends to said optical assembly, an
elongated rear bracket secured intermediate its ends to said
ballast housing and extending along the length of said front
bracket, said brackets having opposite end portions in mating
relation with one another, fastening means removably securing said
brackets together at said mating end portions thereof, and
co-acting separable electrical plug means and electrical receptacle
means mounted respectively on said brackets for automatically
making electrical connection therebetween when said brackets are
moved together in mating relation, and for automatically breaking
electrical connection therebetween when said brackets are separated
from one another, said fastening means comprising bolt means
adjustably secured to one of said brackets, the other of said
brackets having aperture means at its opposite end portions through
which said bolt means may freely pass, and latch means adjustably
secured to said other bracket engaging said bolt means for holding
said brackets in assembled condition, said one bracket being said
rear bracket and said other bracket being said front bracket.
5. A floodlight as defined in claim 1, said optical housing means
comprising a concave reflector.
6. A floodlight as defined in claim 5, said optical housing means
further comprising an outer casing covering said reflector.
7. A floodlight as defined in claim 1, said electrical plug means
being mounted on said front bracket and said electrical receptacle
means being mounted on said rear bracket.
8. A floodlight as defined in claim 7, and enclosure means on one
of said brackets enclosing said electrical plug means and said
electrical receptacle means in connected position.
9. A floodlight comprising, in combination, an optical assembly
comprising optical housing means having an open front end and a
rear end defining a longitudinal axis, means for mounting a light
source within said optical housing means for emitting light rays
through said open front end, an electrical ballast housing arranged
at the rear end of said optical housing means, and connecting means
for detachably electrically and mechanically interconnecting said
optical assembly and said ballast housing, said connecting means
comprising an elongated front bracket at the rear end of said
optical housing means extending transversely of said axis and
secured intermediate its ends to said optical assembly, an
elongated rear bracket secured intermediate its ends to said
ballast housing and extending along the length of said front
bracket, said brackets having opposite end portions in mating
relation with one another, fastening means removably securing said
brackets together at said mating end portions thereof, and
co-acting separable electrical plug means and electrical receptacle
means mounted respectively on said brackets for automatically
making electrical connection therebetween when said brackets are
moved together in mating relation, and for automatically breaking
electrical connection therebetween when said brackets are separated
from one another, said electrical plug means being mounted on said
front bracket and said electrical receptacle means being mounted on
said rear bracket, and enclosure means on one of said brackets
enclosing said electrical plug means and said electrical receptacle
means in connected position, and light transmitting closure means
covering said open end of said optical housing means and forming
therewith an enclosed optical chamber, and air filter means mounted
on said front bracket adjacent said electrical plug means and
enclosed by said enclosure means, said air filter means
communicating with said optical chamber for passage of air to and
from said chamber.
10. A floodlight as defined in claim 1, and support means pivotally
secured to said rear bracket for adjustably supporting said
connected optical and ballast assemblies.
11. A floodlight as defined in claim 1, said end portions of said
front bracket and said rear bracket respectively having rearwardly
facing surfaces and frontwardly facing surfaces, said surfaces
being in confronting mating relation, said plug means and said
receptacle means making electrical connection when said brackets
are moved together along said longitudinal axis into mating
relation.
Description
The present invention relates to floodlights, and more particularly
to a floodlight adapted for use in various outdoor lighting
applications.
It is an object of the invention to provide an improved floodlight
comprising separable optical and electrical ballast assemblies, so
as to enable use of different component assemblies in the
floodlight.
It is another object of the invention to provide a floodlight of
the above type having a quick electrical disconnect device between
the ballast and optical assemblies which is reliable, safe and
weatherproof.
Still another object of the invention is to provide a floodlight of
the above type which is capable of both heavy duty and general
purpose use.
A further object of the invention is to provide a floodlight of the
above type which is readily manufactured, assembled and installed,
wherein the component assemblies are easily detachable and
reattachable, and which facilitates change of optical components to
obtain desired light distribution.
Other objects and advantages will become apparent from the
following description and the appended claims.
With the above objects in view, the present invention in one of its
aspects relates to a floodlight comprising, in combination, an
optical assembly comprising optical housing means having an open
front end and a rear end defining a longitudinal axis, means for
mounting a light source within the optical housing means for
emitting light rays through the open front end, an electrical
ballast housing arranged at the rear end of the optical housing
means, and connecting means for detachably electrically and
mechanically interconnecting the optical assembly and the ballast
housing, the connecting means comprising an elongated front bracket
at the rear end of the optical housing means extending transversly
of the axis and secured intermediate its ends to the optical
assembly, an elongated rear bracket secured intermediate its ends
to the ballast housing and extending along the length of the front
bracket, the brackets having opposite end portions in mating
relation with one another, fastening means removably securing the
brackets together at the mating end portions thereof, and co-acting
separable electrical plug means and electrical receptacle means
mounted respectively on the brackets for automatically making
electrical connection therebetween when the brackets are moved
together into mating relation, and for automatically breaking
electrical connection therebetween when the brackets are separated
from one another.
The invention will be better understood from the following
description taken in conjunction with the accompanying drawings, in
which:
FIG. 1 is a perspective rear view of a floodlight illustrating an
embodiment of the invention;
FIG. 2 is an enlarged top plan view, partly broken away, of the
FIG. 1 floodlight;
FIG. 3 is an exploded rear perspective view of the connecting
arrangement of the floodlight;
FIG. 4 is an enlarged detail view in elevation of the opposite end
portions of the front bracket and associated parts of the
connecting device; and
FIG. 5 is a detail view in elevation of the electrical receptacle
device employed in the floodlight connecting arrangement.
Referring now to the drawings, and particularly to FIG. 1, there is
shown a floodlight embodying the invention which comprises an
optical assembly 1 and ballast assembly 2 detachably secured
together by a quick disconnect device 3 to which is swingably
attached a U-shaped trunnion bracket 4 by means of which the
floodlight may be mounted on a desired surface or support. As seen
in FIG. 2, optical assembly 1 in the illustrated embodiment
comprises a reflector 5 having an open front end covered by a
hingedly attached light transmitting door 6 and enclosed by an
outer housing or casing 7. Housing 7 serves as a protective
enclosure for the optical assembly where heavy duty requirements
make this desirable, but where appropriate, housing 7 may be
dispensed with and reflector 5 may then be the only optical housing
provided.
Socket 8 secured to bracket 11 at the rear end of reflector 5
extends through an aperture in the latter and removably mounts lamp
9 within reflector 5 for emitting light through the front end
thereof. Lamp 9, which typically is a gaseous discharge lamp such
as a mercury vapor lamp, is electrically operated by electrical
ballast components (not shown) contained within ballast housing 10,
as well understood in the art.
In accordance with the invention, a connecting device 3 is provided
for enabling ready connection, both electrically and mechanically,
between ballast housing 10 and optical assembly 1 which is strong,
reliable and safe. As best seen in FIGS. 2 and 3, elongated front
bracket 11 having its central portion 11a rearwardly offset from
its end portions 11b, 11c is secured, with an intervening gasket,
at its central portion 11a to the rear end of reflector 5 (as well
as the rear end of outer casing 7) by screws or other suitable
means so that it extends transversely of the longitudinal axis of
the combined optical and ballast assemblies. Mounted centrally on
the rear side of bracket 11 with an intervening gasket 14 is
electrical plug device 12 having rearwardly projecting contact
prongs 12a, which are suitably connected to lamp socket 8 by leads
13 (see FIG. 3). In the illustrated embodiment, an air filter
device 15 is mounted below electrical plug device 12 communicating
with the interior of optical assembly 1 for preventing entrance of
contaminants therein, as described more fully in U.S. Pat. Nos.
3,457,399 and 3,695,009.
The flat end portions 11b, 11c of front bracket 11, which extend in
a plane substantially normal to the longitudinal axis of the
optical assembly, each have upper and lower apertures 11' therein
and have pivotally attached thereto on the front side locking
straps or latch bars 16 and 17 which have a pair of spaced
arc-shaped slots or recesses 16a, 17a opening at opposite edges, as
shown. Bars 16 and 17 are mounted for rotation on bolts 19 fixed in
bracket 11 between each pair of holes 11'.
Elongated rear bracket 20 secured to the bottom of ballast housing
10 is arranged to mate with front bracket 11 for detachable
connection of optical assembly 1 to ballast assembly 2. As seen in
FIGS. 2 and 3, rear bracket 20 is a generally U-shaped strip member
having a width and overall length commensurate with that of front
bracket 11 and has central offset portion 20a which conforms
generally to the shape of the lower portion of ballast housing 10,
forwardly extending opposite intermediate portions 20d, 20e, and
laterally extending opposite end portions 20b, 20c which mate with
corresponding end portions 11b, 11c of front bracket 11 in
superposed assembled condition. In the assembly, upper and lower
threaded apertures 20' in end portions 20b, 20c are aligned with
corresponding apertures 11' of front bracket 11, it being noted
that apertures 11' are substantially larger than apertures 20',
such that the heads of bolts 21 which are screwed into the four
apertures 20' can freely pass through the oversized apertures 11'.
Lock washers 22, 23 are preferably provided on bolts 21 as
indicated in FIG. 3.
To securely fasten the two brackets 11 and 20 together, bolts 21
are backed off sufficiently from bracket 20 so that their heads are
spaced somewhat from the front surface of front bracket 11 in the
mating position of the brackets, lock straps 16 and 17 are swung
from unlocked position as shown at the right end of bracket 11 to
the latched position shown at the left end of bracket 11 with
portions of the lock straps 16, 17 adjacent the recesses therein
passing between the heads of bolts 21 and the front surface of
bracket 11. Bolts 21 are then tightened, with the intervening lock
washers, against the outer surface of lock straps 16, 17 to provide
a tight assembly of the parts, as shown in FIG. 2. Since clearance
holes 11' provided in front bracket 11 are large enough to allow
the heads of the four bolts 21 to pass through, bolts 21 need not
be removed from rear bracket 20 when assembling or dis-assembling
the brackets relative to each other.
In the illustrated embodiment, hole 20f (see FIG. 3) is located
between the spaced holes 20' at each end portion of the bracket 20
to allow passage of the rearwardly projecting shanks of pivot bolts
19 in the assembled unit.
Secured to opposite bracket portions 20d, 20e (see FIG. 2) are
trunnion pivot bearings 24, 25 defining a transverse pivot axis and
pivotally mounting trunnion bracket 4, the latter being held in
selective position by locking bolts 26, 27.
Mounted centrally on the front side of ballast bracket 20 with an
intervening gasket 18 is a casing 30 containing electrical
receptacle 31 (see FIG. 5) having spaced sockets for receiving and
making electrical contact with the spaced prongs of electrical plug
12 on bracket 11 when the two brackets 11, 20 are moved into mating
relation. The socket contacts in receptacle 31 are connected by
leads (not shown) to electrical operating components within ballast
housing 10. The bottom wall 30b of casing 30 is provided with a
plurality of drain holes 30a, which allow drainage of any water
which may leak into the casing and provide passage for air to flow
into and out of optical assembly 1 through air filter 15. Felt
disks 32 are preferably arranged on bottom wall 30a, such as by
adhesive attachment, covering drain holes 30b to prevent the entry
of insects or the like.
By virtue of the described arrangement, optical assembly 1 may be
readily connected to an already installed ballast assembly 2 simply
by moving optical assembly 1 with attached bracket 11 rearwardly
toward ballast assembly 2 so that prongs 12a of electrical plug 12
are inserted into the sockets of electrical receptacle 31 and
clearance holes 11' pass over the heads of bolts 21, with lock
straps 16, 17 being in unlocked position. Bolts 21, which are
preferably captive in bracket 20, thus aid in aligning the parts
during this assembly operation. Lock straps 16, 17 are then rotated
to locked position beneath the heads of bolts 21 and the latter
bolts are then tightened. To separate the parts, the described
procedure is reversed.
As seen in FIG. 2, by virtue of the central portions of front and
rear brackets 11 and 20 being offset toward each other, the optical
and ballast assemblies may be positioned more closely to one
another and to the center of gravity defined approximately by the
transverse pivot axis.
While the present invention has been described with reference to
particular embodiments thereof, it will be understood that numerous
modifications may be made by those skilled in the art without
actually departing from the scope of the invention. Therefore, the
appended claims are intended to cover all such equivalent
variations as come within the true spirit and scope of the
invention.
* * * * *