US2375589A - Electric lighting fixture - Google Patents

Description

May 8, 1945. L. J. ROZlER ELECTRIC LIGHTING FIXTURE Filed March 1, 1943 2 Sheets-Sheet 1 May 8, 1945. 1.. J. ROZIER ELECTRIC LIGHTING FIXTURE 2 Sheet-Sheet 2 EIIIIIIIY/ 4. A

Filed March 1, 1943 Patented May 8, 1945 BriteLightingfInoi, St. nouis Mmia '(50111'011- tiom-df Missourit epmi tim mmmi, 1943, Serial No; mew a 5"Glaints; (o1. Milt-78):

r This invention relates to electrieslightingtfixtandrnilampholders E mountedhinu saidtaboxestand tures, particularly fiuorescent :ii'g'htingiflxtures, 30 having: dependingpsocket ponti'ons leaadapted to and; has for its objectw'axqstrongwandrdurahle; simpie: andeconomical light-weight fixture: that is easy to assemble anddisassemble sand heat in appearance and: in which the wiring and control equipment are readily accessible:\foninspection; 35

repair or replacement. The: inventionaconsistsiin the electric lighting fixture and:- im the.:.pai:ts-and combinations and. arrangements \of partsuhereimafter described: andiclaimed:

In; the: accompanying;drawings, which" form partof this specification and; whereinulikie sym hols-refer to like parts whereverrthey: oecuny Fig.- ltis a ,perspectivemvievwwof: a; fluorescent lighting)fixtureembodyingmwinventiom Figs. land 3- area enlarged"venticairtraansverse 45 sections on; the lines 2-4 and. 3l----3s respectively;

in. Fig. 1, i t i Fig. 4 is a, fragmentany ventihalz central longitudinal; section through thevlig htinganxture;

1 Fig. 5is-afra-gmentary piamview ofi'thefixture; with the covers removed; from: thetboxesu'for the lampholdersu and with themsmarpv covers ifor the longitudinal wirew-ayshown. :bnok'eni away: in i the regionvoftsaidboxes, n n n Figidisian enlargedlrfragmentaryvertieaiicross section on the lineB -GAimFigM;. i it i Fig; 7 is aperspectivenview tofi'a .pontion 'of one of the wireway covers, i

Fig; 8 is ehplan view: of the channel-shaped longitudinalm'ain. member of the :Iflxture,

cup-shapedstud. supporting: members :iof said 1ongitudinehmainmember; it 31 10?is a. perspective view of the bottom sec- Fig; 1 2" is? an enlarged i fra'gm'entarny vertical] section through said slip cover, showing the -lockg ingscrew therefor;

it In the accompanyingdrawingsL myeinvention k is shown embodied in:a1.fluorescent lighting'fim turew comprising a main, longitudinal-channel member H A; rectangular :boxes; receptaeles or a housingsB sustained by and disposed. crosswise of said channel. member I at the ends thereof i an inverted channel-shapedropen end refleotonCise: 0 cured to the underside of said channel member and extendingnsubstantial-lycfrom end to end thereof; .spaced parallel tubular fluorescent or electric discharge lamps E extendirrg lengthwise of; said vreflector in the upper when 1 thereof";

wardly into the latter.

iliaries including, a.bottomrrfieedabaHastii'Gi which seats on .thevupper edges "of: the inwardi'y-icuried upwardly extendingasiderflan'ges 2aoif the ch'ehnei. member [A midway ofbthew'boxesm; and: isarmovably securedi theretostioyr verticaibolts 35% and starter: switches .l-Iu-engageable with: downwardly opening sockets it provided? theref'onri lint laterally extending portionsdinff the .iampholdeisr-i of saidi boxes; Hangersstnaps stareariweteda'flaitwise tOLthEUIIdK-EISid'e of the"channeldmem'ber"A intermediate between t the .baila'sttG and hoxestB and: have end lfiainges i 5? that: pro i ect. upwardly on opposite sides of said channel memberand are: perforated to receive a suitable: suspension device -(n'ot:.sshown):.l

at Theeiongated main" body on "channel member A1 constitutes a suppent for the 1 boxes: Bwand: an

openwireway iior wiring-(not showmtieadmg from-the ballast Gtto thelamphoiders .F iri ithe boxeseBi The ballastG covers theportiomofithe wireway located: therebeiow; while the portions of said wireway'betweentheballasttanditheboxes 3B are :coveredu'by quick-detachable.corversiia that boxes extend beneath saidWbaliast and iinto sai andrhave their adjacent ends notchedi as at 811; to straddle the ballastsecuring bolts As'sho'wn in Fig. 6;= the covers 8: are of substantial ly mvented channel-'shapedisection and-havetheinde 35 ing sid'e flanges 2 of the=ohannel-member m; and

said covers are-preferablyma-deotresilient'nom metallic materia l such as fiberboard for the dike; whereby: the curled sideamarginal fianges z ofthe covers are adapted to snap into engagement with the curled side marginal flanges of ssaid channel member when said cover flanges are foreedf down- Each of the boxesBx preferably comprises-a sheet metal bottom-member or part-s eetir m with upstanding side and end marginal-flanges M and I2; respectively; The bottom section l fl of each box B is welded or-otherwise rigidly secure-dinetwise to the underside ofz-the cha nnel member;

with its outerside marginal fla-nee disposed in abutting relation to the adjacent-end ofwsaid channel; and with its inner side m'arg inal flange notchedyas-at 13; to receive s aidehannelz The outer sidemarginal flange of theiowet sateenm of aeh iampho'l der boxhas anupWardiyfdxtendi ing portion or we F4 midway-ofthe ends-thereof which is provided with a knockout l5, through which a line wire (not shown) may be brought into said box. The lampholders F are secured by screws IE to the bottom of the lower box section 10, which has holes I! therein through which the depending lamp socket portions of the lampholders extend. As shown in Fig. 10, the

bottom section ll] of the box for the lampholders having the starter switch socket portions 4 have holes 18 therein through which the .starter switches H extend. As shown in the drawings, the channel A and the reflector C are provided at one end of the fixture with registering holes 19 for the depending lamp supporting portions l of the lampholders and the starter switches Hat said end, and at the opposite end with openings l9a through which the depending portions of the lampholders at said opposite end extend. a

The upper section of each of the boxes B comprises a slip cover 20 which snugly fitswithin the upstanding side and end flanges of the lower replaced without disturbing other parts of the fixture. The Slipcovers 20 may be readily removed from the boxes B to permit access to be had to the lampholders F; and said lampholders may be replaced without disturbing the reflector C. The snap covers 8 and the slip covers 20 and the reflector C are preferably made of cheap light-weight non-metallic material, such as fiberboard or other non-critical material; the reflector C may be removed and replaced without disturb- 1 ing the lampholders F or starter switches H; and the inverted cups 2'! form rigid supports for the threaded studs and also provide spaces for accommodating theportions of the nuts 24 that extend-above the ,top of the reflector into engagement with said studs.

section II) of said box and seats on the bottom thereof. Each slipcover 20 has a notch 2| in the outer side wall thereof opposite the knockout IS in the upstanding lug on the corresponding upstanding side flange ll of-the lower or base section l0. The inner side wall of the slip cover also has a notch 22 therein adapted to accommodate the channel member A. The cover 20 is preferably made of fiberboard or: other nonmetallic material and is secured in place by means of screws 23 carried by bushing 23afixed to the end walls thereof. The screws 23 seat in notches l2a provided therefor in the upstanding end flanges 12 of the base member ID of the box and areadapted, when tightened, to hold said cover in place. I i

The reflector ,C is preferably made of enamel finished pressed-board or other non-metallic material andis removably secured to the underside of the channel member A by fasteners comprisingnuts 24 that are carried by said. reflector and cooperate with threaded studs 25 that project downwardly through openings, 26 provided therefor. in said channel member adjacent to the boxes 4 A. .The studs25 are mounted in inverted cupshaped supporting members 21 located in. the wireway 1 in'the channel member A. The cup members 21 have peripheral base flanges 28 that are secured, by rivets 29 around the openings 26 in the channel member A; and the studs 25 extend downwardly through openings provided therefor in the tops of said cup members and have head portions 25a atthe upper ends thereof that seat on and are weldedor otherwise permanently secured to said tops, As shown in the drawings, the nuts 24 which cooperate with threaded studs 25-extend upwardly through holes 30 provided in the reflector C and through the holes 26 in thechannel member A into the stud supportingmembers 21 and are provided abovethe top wall of the reflector C with ,C-shaped retaining washers 3| which seat in annular grooves 32 in said nuts, and below-said top wall with enlarged Obviously, the hereinbefore described lighting fixture admits of considerable modification withsections, a reflector secured to the underside of said member, said lampholders havin depending lamp supporting portions extending downwardly through registering openings provided therefor in said lower boxsections, said member and said reflector, a'ballast secured to said member over said wireway intermediate between said boxes,

iii

and quick-detachable non-metallic snap covers for said wireway between said ballast and boxes.

2. A lighting fixture comprising an elongated main member having curled side flanges forming a longitudinal wireway along the top of said member, boxesspaced apart longitudinally of said member and communicating with said wireway, each of said boxes comprising a lower pan section rigid with said member and an upper-slip cover section, lampholders mounted in said lower sections, a reflector secured to the underside of said main member, said lampholders having depending lamp supporting portions. extending downwardly through registering openings. rovided therefor in said lower box sections, said member and said reflector, a ballast seated on said curled side flanges of said member, and covers for said wireway between said ballast and boxes, said covers having curled marginal flanges adapted for snap engagement with the curled side flanges of said member. i

3. A lighting fixture comprising a. channel member havin its channel facing upwardly to form a wireway, boxes spaced apart longitudinally of said channelmember and communicating with said wireway, each of said boxescomprising a lower section rigid, with said channelmember and anupper closure section for said lower section, a reflector disposed beneath said channel member, supports mounted in said wireway, threaded studs depending from said supports; nuts loosely mountedin said reflector and engageable with said studs through openings provided therefor in the bottom of said channel member, lampholders mounted in the lower sectionsof said boxes and having; portions extending downwardly through said channel member and said reflector, a ballast mounted on said channel member over said wirewaybetween said boxes, and covers for said wireway between said ballast and boxes.

4. A lighting fixturecomprising an upwardly opening wiring channel, boxes spaced apart longi tudinally of and communicatingwithsaid wiring channel, each of said boxes comprising a lower section rigid with said wiring channel and an -upper closure section for said lower section, a ballast mounted on said wiring channel between said boxes, covers for said wiring channel between said ballast and boxes, a reflector secured to the underside of said wiring channel, lampholders mounted in said lower sections and having depending lamp supporting portions extending downwardly therefrom through registering openings provided therefor in said lower box sections and said reflector, the lampholders in one of said boxes having downwardly opening sockets therein, and starter switches engaging saidsockets through registering openings provided therelower section of said box.

5. A lighting fixture comprising an elongated load supporting body member having an open wireway therein extending from end to end thereof, boxes sustained by said body member at the ends thereof said boxes, extending on opposite sides of said body member and enclosing the end portions thereof and the end portions of the wireway therein, closure members for said boxes, closure members for said wireway between said boxes, 9. separate elongated reflector detachably secured to said fixture beneathsaid body member and boxes, and lampholders. mounted in said boxes on opposite sides of said body member and having depending lamp supporting portions ex- LOUIS J. RO ZIER.

for, in said reflector and Wiring channel and the

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