US 3192381 A
Description (OCR text may contain errors)
E. F. zuRAwsKl ErAL 3,192,381
June 29; 19,65
LIGHTING FIXTURE 2 Sheetsfsheet 1 Filed Sept. 14, 1962 June 29, 1965 E. F. zuRAwsKl l-:TAL 3,192,331
LIGHTING FIXTURE Filed sept. 14. 1962 2 sheets-sheet 2 27 JI j gyWM/Mfw ture than the lower portion of said embossment.
United States Patent O 3,192,381 LIGHTING FIXTURE Edward F. Znrawslri and Frank P. Schram, Chicagg, I ll., assiguors to Garcy Corporation, a corporation of Iliinois Filed Sept. 14, 1962, Ser. No. 223,611 Claims. (Cl. 24d-147) This invention relates to a lighting fixture, and is particularly concerned with means for detachably securing a diffuser panel to the fixture.
The lighting fixture comprises a rectangular frame having an outward embossrnent in each end near one longitudinal side of the frame. The embossments extend upwardly for a purpose hereinafter described. The ernbossments are longitudinally aligned and are of Substant-ially identical shape except that one of them is short and the other is elongated transversely toward the remote longitudinal edge of the frame. A flat spring positioned in the elongated embossment is secured to the end wall of the frame. The free end of the spring terminates approximately at the end of the transverse elongation in longitudinal alignment with one edge of the short embossment.
The diffuser panel has a pin project-ing outwardly from each end near one longitudinal edge thereof. The panel and pin are preferably made of plastic and are integral. The panel is detachably secured to the frame by inserting one of the pins in the short embossment and then turning the panel angularly to position the second pin against the spring in the elongated embossment. The panel is then moved to bring the second pin into axial alignment with the first pin. When the pins are positioned in their respective embossments, and are in axial alignment, the second pin is clear of the free end of the spring. The panel may then be suspended with one longitudinal edge of the frame supported on said pins in pivotal relationship to the adjacent edge of the fra'me. The free end of the spring, which springs outwardly to its normal position as soon as the second pin is moved out of engagement therewith, is spaced from the wall of the embossment. The spring serves as a stop member and engages the pin if the panel is pushed upwardly while it is in its vertical position. The abutment of the pin against the free end of the spring prevents accidental displacement of the panel from the frame.
Although the fixture is described as having the pins arranged so that the diffuser plate has one longitudinal edge pivoted by the interengagement of the pins and the ernbossments, it will be understood that the pins may project from the longitudinal edges of the diffuser panel. In such case the diffuser panel would be hinged along one end of the panel.
Each longitudinal edge of the frame is provided with an inwardly extending shoulder adjacent its lower edge, and the diffuser panel is provided with an outwardly extending flange on each longitudinal edge. The longitudinal edge of the diffuser panel adjacent which the pins are located is moved upwardly until each pin abuts the upper edge of the embossment in which the pin is positioned. The opposite longitudinal edge of the diffuser panel is then swung upwardly about the pins as pivots. The upper portion of the embossment is closer to the adjacent edge of the fix- When the pins are in the upper portion of the embossments, the slope of the end wall of each embossrnent permits the diffuser panel to be shifted laterally over the adjacent shoulder far enough to allow the flange at the longitudinal edge of the diffuser panel remote from the pins to clear the opposite shoulder as the panel is moved pivotally upwardly about the pins. As the last mentioned flange clears the adjacent shoulder, the diffuser panel is shifted laterally in the opposite direction, and is then lowered to rest the anges at each longitudinal edge of the diffuser panel on rice the shoulders of the rectangular frame.y The spacing of the lower portion of the end wall of the embossment from the adjacent edge of the fixture limits the position of the diffuser panel laterally of the frame when the flanges of the panel rest on the shoulders of the frame. In this position, the panel cannot be shifted laterally far enough to permit the edge of the flange remote from the pins to clear the shoulder on which it normally rests.
In order to obtain access to the interior of the xture, the longitudinal edge of the panel adjacent the pins is lifted. The end of each of the embossments is sloped to permit the adjacent edge ofthe panel to be shifted laterally when it is in said raised position. The panel is shifted laterally far enough for the remote flange to clear its shoulder, and the panel is then moved pivotally downwardly about the pins until the panel is suspended in vertical position with each pin engaged with its embossment. If the panel is to be removed from the frame, the end of the panel adjacent the elongated embossment is turned angularly to move its pin toward the free end of the flat spring. The free end of the spring is depressed, either manually or by a suitable tool, and is held down until said pin moves on to the fiat surface of the spring. The angular movement is continued, with said pin riding over the spring, until the other pin is moved out of engagement with the short embossment.
The structure by means of which the above mentioned and other advantages of the invention are attained will be fully described in the following specification, taken in conjunction with the accompanying drawings showing a preferred illustrative embodiment of the invention, in which:
FGURE 1 is a view, partly in elevation and partly in section, showing a diffuser panel mounted in a lighting fixture and showing, in dotted lines, the diffuser panel just before it is moved into the mounted position shown in solid lines;
FIG. 2 is an enlarged fragmentary cross sectional View of the diffuser panel mounted in the frame of a lighting fixture.
FIG. 3 is an enlarged fragmentary exploded perspective view showing one corner of the diffuser panel and the inside corner of the frame in which the panel is to be mounted;
FlG. 4 is an enlarged fragmentary longitudinal sectional view showing one side of the diffuser panel mounted in the frame of the lighting fixture;
FG. 5 is an enlarged fragmentary horizontal sectional view through the frame of the lighting fixture, showing the diffuser panel in elevation;
FIG. 6 is a fragmentary bottom elevational view showing the diffuser panel mounted in the lighting fixture; and
FIG. 7 is an enlarged fragmentary perspective view of the diffuser panel.
Referring to the drawings, the lighting fixture comprises a rectangular frame 2 and conventional structure for supporting a plurality of fiuorescent light tubes 3. Since the present invention is concerned solely with the means for mounting a diffuser panel 4f in a lighting fixture, the structure of the fixture will not be specifically described, except for the rectangular frame. The other portions of the fixture may be of any conventional structure.
The rectangular frame comprises two identical longitudinal side walls 56 and two end Walls 7, S. Side walls 5 and 6 have inwardly extending shoulders 9 and 10, respectively. The shoulders are parallel and are horizontal when the fixture is in its normal horizontal position. The end wall 8 is provided with an outward embossment 11 adjacent longitudinal edge 5 and end wall 9 is provided with an outward embossment 12, also adjacent longitudinal edge 5.
As `shown best in FlGS. 2 and 3, the embossment ll is form'edto'provide a substantially horizontal bottom wall 13, an end wall yld that extends upwardly and outwardly toward longitudinal side wall 5, and a top wall l5v that slopes'downwardly and inwardly to the region indicated at' 16 in' ElG. 2. The description of'e'mboss'rnen't lill up to this pointfapplies also to ernbossrnent 12. The only difference betweenthe embossments is that the inner edge of embossment l12 terminates in the region ld' and t'op'wall 1 5 extends downwardly to meet bottom wall i3 to form' a closed ligure. 'Embossment ll, however, is elongated in the transverse direction. inwardly of the region 16 walls 1 7 and13'extend parallel to eachother for' a substantial distancel Y Aflat spring 1S is riveted inside the embossnjient lll, as indicatedat 19, with its 'free end terminating adjacent the region 16. The spring is ilexed sothat when its free end is not restrained it is spaced outwardly from thewall of the embossrnent'to which it isrivete'dj v'The diffuser panel 4 comprises a rectangular bottom 20 having opstanding longitudinal sidewalls 21, 22 and opstanding end walls' 23, V2d. Side walls 2l. vand'ZZ are provided with horizontal outwardly extendingfianges andy 26', respectively. The overall width ofthe diffuser panel'ly is greater than the distance'between the inner edges of shoulders 9'and 10, but the width of the diffuser panel exclusive of flanges 25 and26 is less than vsaid distance. wall 23" has a pin 27l extending outwardly therefrom adjacent lside wall 21, and end wall 24 has a pin 2,8 extending outwardly therefrom in axial alignment with pin 21. Although the'diifuser panel is preferably an integral structure 4rnolded'of suitable plastic, it will be understood that it may be of any suitable material and may be fabricated of a plurality of components. When the diffuser panel 4 is to be mounted in the frame 2, the panelis movedto insert the pin v28 intol the short embossm'ent 12 and the panel is then turned angularly to position the pin 27 intothe elongated portion ofjembossmentll. The turningy movement of panel 4 is continued to slide pin 27 over the spring 1S. As the pin 2,7 moves over thesp'ring it presses the spring flat against the wall of the embossrnent.- As soon as'the pin 27' passes the free end of thespring, the spring snapsback to its normal. position,'in which. it is spaced from the Wall of the emr-- lossment lf The panell may be suspended by the engagement of pins 27 and 2S with the embossments 1l and ,12, respectively, with side wall 22 hanging down freely; In'thispositionfthe interior of the fixture is accessible for replacement of fluorescent light tubes 3. v
The side of panel i adjacent the pins v27 and 23 is then moved upwardly until each of said pins abuts the upper edge lof its embossme'nt.A The outward: slope of end walls 14 of the abutments permits the lpanel to be'shiftedjlater- Although we have described a preferred embodiment of the inventionin considerable detail, it will be under stood that the description thereof is intended to be illustrative, rather than restrictive, as many details of construction may be modified or changed without departing from the spirit or scope of the invention. AAccordingly, we do not desire to" be restricted lto ythe exact structure described. Y
l. A lighting fixture comprisingY a vrectangular frame having an openbottom and a diffuser panel mounted in said frame, saidrframe comprising two longitudinal Vwal-ls each provided with an internal shoulder and two end walls each provided with an outward embossment adjacent one of said longitudinal walls, said diffuser panel having two longitudinal side walls and two ends, at lateral flange extending outwardly from ea-chy side wall of said diffuser panel, the total width of said diffuserpanel. and both of said flanges being greaterthanthe internal distance between the shoulders of said frame, the width of'said diffuser panel exclusive of vsaid flanges being less than the internal distance between the shoulders of'said frame,
said diffuser p anel being adapted to tvwithn the open bottom'of said frame .with saidV llange's seated on said shoulders, anda pin extending longitudinally from each end of said diffuser panel, said pins being axially aligned, on-e of said embossments having an elongation extending toward the remote longitudinal edge of said frame, said elongation permitting one of'sa'id'pin's to be moved trans versely of said frame into engagement withv said one embossment when said other pin is positioned in said other emibossment, said ernibossments eachv having' anv upper p ortionextended toward the adjacent edge of said frame,
ally outwardly, as the pins move upwardly inthe embossf ments. This lateral shift is fsufcient to cause' the flange 26 toclearA the shoulder lt) as the diffuser panel is swung pivotally upwardly about the pins 27' and 2S. The panel is lowered horizontally when the flange` 26 is above the shoulder lt), andthe panelis shifted laterally in the opposite'direction by the slope of end wall 14 so that flange 25 is seated on shoulder 9Y and flangef26 is seated on.
shoulder lil. The diffuser panel is released by a reversal of the steps describedabove. f
When the diffuser panel is suspended from one side, the spring lprevents accidental turning movement of the panel toV anex'tent sflicient to displace the pin 27 from the elongated embossrnent ll. The resilience of Lthe spring spacesits free end from the wall yof the emboss-v ment so'that if'th'e panel is turned the pin 27 will, abut the spring which then'acts as a stop member. If the panel is'to bei removed from the frame, the free end of the spring is pressed against the wall ofthe embossrnent,
-either'manually or by any suitable tool, until the panel is turned far enough for the pin2'7 to ride over the free end of the spring.
the upper portions of said embossments permitting said diffuser panel to be shifted laterally of said frame above the level at which `said diffuser panel is normally seated in said frame. Y
2.Y A lighting yfix-ture comprising a rectangular frame having an open bottom and a diffuser panel Vrnt'n`n-ited in said frame, said frame comprising two longitudinal walls each provided with an internal shoulder and two end walls each provided with an outward-`enrbossment,adjacent one of said 'longitudinal walls, said diffuserl panel having two longitudinalv side walls and two ends, ala-feral llange ex# tending outwardly'from each side ,walls of said diffuser panel, the total width ofl said diffuser panel and both of saidfianges beinggreater than the internal distance betweenA the shoulders'of said frame, the width o f said diffuser panel exclusive of said flanges being less thanthe internal distance between the yshoulders o f'said frame, said diffuser panel being Yadapted to nt withinl the open bottorn of said frame with said flanges seated von said shoulders, a pin extending longitudinally from each endof said diffuser panel, said pins :being axilally aligned, one ofV said embossments elongation extendingA toward the remote longitudinal edge'of said ifram e,tsaidV elongation` permitting one of said pins tor be moved transversely of said frame into engagement with said` one embossment when said other pin KVis 'positioned in said other embossment, and means lp'ositionedsin said elongation and engageableL with the pin in theembossment adjacent said elongation pre# venting accidental displacementv of eitherpin from its -embos'smenh said lembossmentsyeach having an upper portion extended towardlthe'adjacent edge of said frame, the upper portions of said enlbossmentsY permitting said diffuser panel to 'be shifted late-rally'of said frame above the .level at which said diffuser panel is normally seated in said frame.V
A lighting Ifixture comprising a rectangular frame having an openj'bottom'an'd a diffuser Vpanelzrnounted in said frame, said frame comprising two longitudinal walls each providedwithran internal shoulder and ltwo endwalls each providedwith anoutward embossment adjacent one of said longitudinal walls, said dilfuserpanel having two longitudinalnside walls and two ends, a lateral flangeV extending outwardly from each side wall of said dilfuser panel the total width of said diffuser panel and both of said tianges being greater than the internal distance between the shoulders of said frame, the width of said diffuser panel exclusive of said flanges being less than the internal distance between the shoulders of said frame, said diffuser panel being adapted to t within the open bottom of said frame with said anges seated on said shoulders, a pin extending longitudinally from each end of said diffuser panel, said pins -being axially aligned, one of said embossments having an elongation extending toward the remote longitudinal edge of said frame, said elongation permitting one of said pins to be moved transversely of said frame into engagement -with said one embossment when said other pin is positioned in said other embossrnent, and resilient means secured in said elongation to prevent accidental displace-ment of said one pin from said one embossment, said means being so shaped as to permit movement of said one pin from said elongation into said one embossment and to normally prevent movement of said one pin from said one embossment into said elongation, said embossments each having an upper portion extended toward the adjacent edge of said frame, the upper portions of said embossments permitting said diffuser panel to be shifted laterally of said frame above the level at which said diffuser panel is normally seated in said frame.
4. A lighting fixture comprising .a rectangular frame having .an open bottom and a diffuser panel mounted in said frame, said frame comprising two longitudinal walls each provided with an internal shoulder and two end walls each provided with an outward embossrnent adjacent one of said longitudinal walls, said diffuser panel having two longitudinal side walls and two ends, a lateral flange extending outwardly Vfrom each side .wall of said diffuser panel, the total width of said diffuser panel and both of said flanges being greater than the internal distance between the shoulders of said frame, the width of said diffuser panel exclusive of said flanges being less than the internal distance between the shoulders of said frame, said diffuser panel being adapted to t within the open bottom of said frame with said flanges seated on said shoulders, a pin extending longitudinally from each end of saidV diffuser panel, said pins being axially aligned, and means whereby each of said pins may be engaged with one of said embossments, said embossments each having its end closest to the adjacent edge of said frame inclined toward said adjacent edge in an upward direction, the shape of said embossments permitting said diffuser panel to be shifted laterally toward said adjacent edge as it is moved upwardly from its position on said shoulders and causing it to be automatically shifted laterally in the opposite direction to seat said flanges on said shoulders when said panel is lowered in horizontal position with its pins positioned in said embossments.
5. A lighting fixture comprising a rectangular frame and a diffuser panel mounted in said frame, said frame having two longitudinal walls, t-wo end walls and an open bottom, each of said end walls having an outward embossment adjacent one of said longitudinal walls, said diffuser panel having a pin extending longitudinally from each end, said pinsbeing axially aligned, the longitudinal distance between the outer ends of said pins being greater than the internal length of said frame, one of said embossments having an elongation extending transversely of said frame toward the remote longitudinal edge of said frame, said elongation permitting onev of said pins to be engaged therewith when said other pin is engaged with said other embossment, said one pin being movable in said elongation by a turning movement of said panel until it is engaged with said one embossment, the total width of said diffuser panel being less than the width of said open bottom, means projecting inwardly from the longitudinal walls of said frame to support said panel in horizontal position within said open bottom, the upper portion of said ernbossments being extended toward said adjacent longitudinal edge to provide clearance for lateral movement of said diffuser panel beyond the position occupied by said panel during normal use of said fixture by a distance at least equal to the overlap between vsaid means and the longitudinal wall remote from said ernbossments, whereby said panel may be shifted laterally with said pins in said embossments to position both longitudinal walls within said rectangular frame above said means, and then moved downwardly to rest on said means.
References Cited bythe Examiner UNITED STATES PATENTS 2,701,840 2/55 Carlson 240-147 2,828,408 3/58' McCormack 240--147 2,978,5 4/ 61 Cohen 2120-38 NORTON ANSI-IER, Primary Examiner.
EVON C. BLUNK, Examiner.
UNITED STATES PATENT OFFICE CERTIFICATE 0F CORRECTION Patent NO, 3,192,381 June 29, 1965 Edward F Zurawsk et al,
It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.
Column 4, line 16, for "at" read a line S4, for "axilally" read axially line 55, after "embossments" insert having an column 6, line 28, for "portion" read portions Signed and sealed this 30th day of November 1965.
ERNEST W SWIDER EDWARD J. BRENNER Anesting Oficer Commissioner of Patents