US3895227A

US3895227A - Floodlight

Info

Publication number: US3895227A
Application number: US414191A
Authority: US
Inventors: Omer E Murray; Jerry R Plemmons
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1973-11-09
Filing date: 1973-11-09
Publication date: 1975-07-15
Anticipated expiration: 1992-07-15
Also published as: ES429384A1

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.

Description

Murray et a1.

[ FLOODLIGHT [75] Inventors: Omer E. Murray, Hendersonville;

' Jerry R. Plemmons, Asheville, both of NC.

[73] Assignee: General Electric Company,

Pittsfield, Mass.

[22] Filed: Nov. 9, 1973 [21] Appl. No.: 414,191

[52] US. Cl. 240/73 R; 240/41 R [51] Int. Cl. F21S 5/00 [58] Field of Search 240/25, 41 R, 41.55, 41.6, 240/44, 44.2, 52, 61, 73 R, 73 BA, 78 R [56] References Cited UNITED STATES PATENTS 1,486,896 3/1924 Hubbell 240/35 R 1,632,173 6/1927 Cohen 240/6l.12 3,284,624 11/1966 Brasty et a1. 240/78 R X 3,511,984 5/1970 Blaisdell et a1. 240/44.1

fii: AVMLABLE 39W 1 July 15, 1975 3,551,667 12/1970 Husby 240/25 X 3,662,164 5/1972 3,711,702 1/1973 Adra 240/41 R X 3,725,695 4/1973 Eversberg 240/78 R X FOREIGN PATENTS OR APPLICATIONS 140,352 3/1920 United Kingdom 240/52 R Primary ExaminerSamuel S. Matthews Assistant ExaminerAlan Mathews Attorney, Agent, or Firm-Sidney Greenberg [57] ABSTRACT 11 Claims, 5 Drawing Figures PATENTEDJUL I5 I96 SHEET electrical ballast assemblies, so as to enable use of dif ferent 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, 1 1c 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 US. 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 in superposed assembled condition. In the assembly, upper and lower threaded apertures 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 disassembling 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, 202 (see FIG. 2) are trunnion pivot bearings 24, 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 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 300, 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 l5. 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 l6, 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.

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 separa ble 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 I, 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 recepta' cle means making electrical connection when said brackets are moved together along said longitudinal axis into mating relation.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION PATENT NO. 3 895 227 DATED 1 July 15, 1975 |NVENTOR(S) Omer E Murray and Jerry R. Plemmons It is certified that error appears in the aboveidentified patent and that said Letters Patent are hereby corrected as shown below:

Col. 4, line 3, before "in" the word best should be inserted.

Col. 4, line 51, "Sid" should be said Col. 5, line 22, "18" should be bolt Signed and Sealed this A ttes t:

RUTH C. MASON C. MARSHALL DANN' Arresting Officer (innmr'ssimrer ufParenrs and Trademarks

Claims

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.

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.

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.