US2717308A

US2717308A - Lamp guard construction

Info

Publication number: US2717308A
Application number: US155493A
Authority: US
Inventors: Joseph D Kevorkian
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-04-12
Filing date: 1950-04-12
Publication date: 1955-09-06
Anticipated expiration: 1972-09-06

Description

p 6, 1955 J. D. KEVORKIAN 2,717,308

LAMP GUARD CONSTRUCTION Filed April 12, 1950 dgsepn D. KEVORKIAN ATTORNEY United StatesPaterit This invention relates .to lamp guards and morejparticularl'y to an improved construction'thereof.

Among the principal objectslof the Ipresent invention is to provide alamp ,guard offthe type having separable reflector and wire guard member'sj fora lamp to "be pro- 'tectively enclosed therebetween and'whichare relatively so designed as to not only. insure rnaximum protection for and operatingefliciency ofthefllamp, but also provide for easy assembly and disassembly of the members as may be required in connection with replacement of'the lamp. 1

A further-andimportant objectofthe. invention is to provide a trouble lamp guard unit with a revoluble supporting hook -so-arr-anged-as not toiriterfere in'=any=way with the separabilit-yof therefleetonand wire guardmembers of the unit,-the-hook being swivelly connected to- -'the reflectonmember-as-a-permanentelement thereof.

Still-other objeets-ofthe-invention-are to provide a lamp guard units-whichris simple:andainexpensive in con- WhlClllS strong anddurable'inuse.

Other objects and advantages of the invention will appear more fully hereinafter, it being understood that the present invention consists substantially in the combination, construction, location and relative arrangement of parts, as more fully described hereinafter, as shown in the accompanying drawings and as finally pointed out in the appended claims.

In the accompanying drawings, which are illustrative of a preferred construction of lamp guard embodying the principles of the present invention:

Figure 1 is a perspective view of the guard in its assembled form;

Figure 2 is a vertical sectional view thereof;

Figure 3 is a top plan view thereof;

Figure 4 is a fragmentary sectional view of the upper 50 portion of the lamp guard illustrating the mode of effecting assembly or disassembly of the separable parts thereof; and

Figure 5 is a fragmentary sectional view corresponding to Figure 4 but showing the guard parts in assembled relation.

Referring now more particularly to the drawings, it will be observed that the lamp guard of the present invention essentially consists of a reflector part suitably cut and stamped of sheet metal, a wire guard part 11 formed of wire rod elements which are severally bent and welded together to form an open frame which mates with the reflector part 10 to provide a protective enclosure for a lamp (not shown), and a supporting book 12 for the enclosure which is swivelly secured to the upper end of the reflector part 10.

The sheet metal reflector part 10 is formed to provide a central or intermediate body portion 13 of substantially semi-cylindrical shape in transverse cross-section, the

opposite ends

14 and 15 of said intermediate body portion being correspondingly concaved, as shown, to provide maximum light-reflecting efliciency for the unit. The

lower "concaved end 15 of the reflector. partf10 is axially extended to provide a collar member'flifofsemi-cylindricalshape, the opposite extremities df whicharej're- ..spectively provided with outwardly projecting coplanar 5 lugs1'7, eachrhaving5a tapped hole'ther'einfor threadeiily receiving a suitableclampingscrew'18.. v "To reinforce and. strengthen the sheetinetal. reflector part '10, itfis provided with. apair. of'circumferentially extending ribs 19-19, which are. arranged in axially 10 .spaced,iparallel-relation it being notedjthatthese ribs are 7 each so embossed'in the reflector shell as. toproject. in-

teriorly thereof and that' 'the opposite endsofgeachl rib respectively terminate short of thegmarginaledges 20.."2'0 of the reflector shell. v i

'The wire guard part'llof the lamp. guard unitl-isformed "of .a -wire rod elementZl dfQinvented. U-shape,fawirerod element '22 of inverted lJ-shape andamair o fd-shap'ed wire rod elements12323, all-- of which, elements, are suitably' secured togethenjas shown, as by spot-welding at 20 the points 24, to provide. a rigid. openffrarne era shape which.,generally conforms-and is. complemental. tohthat of. the reflector part 10. The vertically extending Iportions- '2'5 of the wire. rod.v element 21 are symmetrically disposed, to either sidesoflthe. vertieally'extending 5 por'tion 26 of the element. 22,"whiletheltransversecircular v elements 23- 23, which hold. theportions 2 5.25tand-2:6 -incircumferentially spaced relatiomare each dfaallength sufficient to. present. theLopposite .ends thereof fjustiinsi de .-the marginal edges.20 ;20 of thereflectorshe'll whenf the wire guard and theshell areassembled asshown'in Figure 1. lTheilower extremities of the wire portions"2'525 and26 are respectively "secured, preferably by welding, to a collarmember 27 of semi-cylindrical shapefthelatter being provided with outwardly projecting fcoplanar'Tlugs whichare respectively apertured-for,;projection'there- "through "of the clamping screws"18 "emplbyed' tofclamp the "collar members 16"and'27 about a'lamp socket or holder (not shown). It will be noted that the transverse circular elements 23-23 are secured to the inner sides of the wire portions 252526 and are respectively disposed in circumferential continuation of the internal ribs 1919 of the reflector shell 10. Thus, when the shell and wire guard are assembled, the ribs 1919 and the circular elements 23-23 provide an axially spaced pair 5 of internal strengthening ribs extending circumferentially about the full circumference of the cylindrical portion of the assembled unit.

For detachably securing together the upper ends of the reflector shell 10 and the wire guard 11, the central wire 7 rod element 22 of the guard is provided with a hookshaped terminal extremity 29 which is adapted to be projected into an opening 30 suitably provided therefor in the top of the reflector shell. When it is desired to replace a lamp, it is merely necessary to unclamp the

collar members

16 and 27 from the lamp socket or holder, following which the reflector shell and wire guard may be swung apart, as shown in Figure 4, to remove the guard from the lamp holder. Should it be desired to completely separate the wire guard 11 from the shell, this may be readily effected by disengaging the hooked end 29 of the wire guard from the opening 30 in the shell, but ordinarily the hooked end remains seated in the opening 30 to provide a hinged connection between the top ends of the sheet metal shell and the Wire guard.

Swivelly connected to the top end of the reflector shell 10 is a wire rod supporting hook 12, this hook being provided with a shank 31 which is rotatably held in an opening 32 in the shell, preferably by a pair of suitably flanged elements 3334. It will be noted that the hooked extremity 29 of the wire guard is bent, as at 35, to adequately clear the bottom flange 34 of the supporting hook 12 and so does not impose any interference to free rotaaim of at latter about the axis of its shank. A150, it will be observed that the supporting hook is swivelly conments to constitute a rigid lamp-protecting grille adapted for removable assembly with said reflector member, one

1. In a lamp guard of the character described, a sheet metal reflector member having a central body portion of substantially semi-cylindrical shape and opposite end portions disposed respectively at the top and base of the guard and of generally spherical contour, said central body portion having embossed therein a pair of axially spaced, circumferentially extending ribs projecting interiorly of the shell with the opposite ends of each rib respectively terminating short of the opposite vertical edges of said body portion, and a guard member formed of interconnected wire rod elements to form an open frame of a shape generally complemental to that of said reflector member, said wire rod elements including a pair of transversely curved wire rod elements axially spaced for coplanar disposition relatively to said internal ribs of the reflector shell with the opposite extremities of each of said transversely curved wire rod elements positioned inside of, and extending inwardly beyond, the vertical edges aforesaid of the reflector shell, whereby upon assembly of said reflector and guard members each of said transversely curved wire rod elements constitutes a circumferential continuation of an internal rib of the reflector shell.

2. In a lamp guard of the character described, a sheet metal reflector member having a body portion of generv ally semi-cylindrical shape and a concaved top portion, a' frame member formed of interconnected wire rod eleof said Wire rod elements being provided at the top end of said frame with a hook-like extension for projection into an aperture formed in the concaved top portion of the reflector member, said hook-like extension, when projected into said aperture, providing a hinged separable connection between the-'to'p ends of said reflector and frame members, and a supporting hook for the guard swivelly mounted in said top portion of the reflector member. Y

3. In a lamp guard of the character described, a sheet metal reflector member having a body portion of generally semi-cylindrical shape anda concaved top portion, a plurality of interconnected wire rods forming a rigid open-framed guard member of a shape generally complemental to that of said reflector member adapted for removable securement to the latter to provide an enclosure for a lamp, said top portionof the reflector having an aperture therein and said guard member having' a hook-like extension at its upper end for projection into said aperture to provide a hinged separable connection between said reflector and guard member, said hook-like extension being formed as an integral part of one of said wire rods, and a supporting hook for the guard independent of said guard member and swivelly mounted in said portion of the reflector member.

References Cited in the file of this patent UNITED STATES PATENTS 7 1,722,773 Stewart July 30, 1929 1,843,418 Ericson Feb. 2, 1932 2,178,907 Hockley Nov. 7, 1939 2,318,329 Popp V May 4, 1943 2,580,359 Moineau Dec. 25, 1951 FOREIGN PATENTS 246,121- Switzerland Dec. 15, 1946