US2859333A

US2859333A - Lighting fixtures

Info

Publication number: US2859333A
Application number: US570161A
Authority: US
Inventors: Burliuk David; Rambusch Edward
Original assignee: Rambusch Decorating Co
Current assignee: Rambusch Decorating Co
Priority date: 1956-03-07
Filing date: 1956-03-07
Publication date: 1958-11-04
Anticipated expiration: 1975-11-04

Description

D. BURLIUK vEI'AL LIGHTING FIXTURES Nov. 4, 1958 5 Sheets-Sheet 1 Filed March 7, 1956 INVENTORS E4 v/D 50AM/UK BY {Dn/Aaa 4W/@waff Sam/,

ATTORNEY Nov. 4, 1958 n. BuRLluK TAL LIGHTING FIXTURES.

Filed March 7, 1956 5 Sheets-Sheet 2 IN VEN TORS DAV/D ,B1/PL /uK BY ED WARD PAA/:BUSCH 5 sheets-sheet 5 D. BURLIUK ETAL LIGHTING FIXTURES Nov. 4, 1958 Filed Mann 7, 1956 IN VEN TORS ,DA v/D BUPL /UK .BY v Dwmn RAMBuscH ATTOPNEY Nov. 4, 1958 D. BuRLluK ETAL LIGHTING FIXTURES 5 Sheets-Sheet 4 Filed March 7, 1956 IN VEN TORS 13A v/D B uRL/ UK ED WARD RAMB usc# Y TTONEY Nov. 4, 1958 D. BURLIUK l-:rAL

LIGHTING FIXTURES 5`Sheets-Sheet 5 Filed March 7, 1956 IN V EN TORS 2,4 v/D UIA/(JK [Jaw/maa PAMe//Jcw 2,859,333 Patented Nov. 4, 1958 LIGHTING FIXTURES David Burliuk, Huntington, and Edward Rambusch, Harrison, N. Y., assignors to Rambusch Decorating Cornpany, New York, N. Y., a corporation of New York Application March 7, 1956, Serial No. 570,161

2 Claims. (Cl. 24U-78) The present invention relates to lighting xtures and f is moreA particularly directed toward direct lighting tixtures wherein a concentrated light beam is directed into the desired azimuthal direction and at selected sloping angles for spotlighting of displays, action, or the like.

In fixtures heretofore available for such purposes structural limitations have been such as to limit the angle the beam could make with the vertical and restrict the area over which the beam could be adjusted. Y,Many such xtures are unable to attain angles of 45 from the vertical. According to the present invention it is readily possible to secure beam angles all the way up to 60 above the nadir.

According to the present invention the objects are available in relatively simple structures which may be readily installed and serviced from below or from the attic. When the servicing is to be done from the attic the adjustments are readily made because it is possible to first adjust the fixture to a position where a sight line is in the position of the axis of the desired beam and to then, with certainty, readjust the fixture so that the light beam is in the position of the sight line. The operator can thus predetermine the direction of the beam to be produced.

The construction provided is one in which one can readily relamp the iixture from the attic with the assurance that the beam can be directed in the previously determined direction.

According to the present invention, the wide adjustment of the lamp position is possible in an extremely shallow structure so that it is well suited for use where limited space is available for recessing the xture.

Other and further objects of the invention will become apparent as the description proceeds.

The accompanying drawings show, for purposes of illustrating the present invention one embodiment in which the invention may take form, together with modifications thereof, it being understood that the drawings are illustrative of the invention rather than limiting the Same.

In the accompanying drawings:

Figure l is a vertical sectional view through the lighting iixture designed to permit a 623 tilt of the beam and showing it mounted in ceiling, the full lines showin the lamp in its uppermost position with axis vertical for down lighting,.the peephole being on a 60 sighting line, the dotted lines Showing the lamp displaced to its lowest position for lighting objects 60 from the vertical;

Figure 2 is` a plan view at reduced scale, taken in the direction of the arrow 2 of Figure l, parts being omitted and showing the lamp carrier in the same position as in full lines in Figure l; Y

Figure 3 is an elevational View at reduced scale, also taken in the direction of the arrow 2 of Figure l, but showing the lamp carrier turned through nearly 180 so that the peephole is in the position of the lamp of Figure 2, and vice versa;

Figure 4 is a view similar to Figure 3, showing the position of the lamp carrier when the peephole is in the position to sight on an object to be lighted by the 50 tilted beam of Figure 5;

Figure 5 is a view similar to Figure 2, indicating the lamp carrier turned through an oblique angle such as to produce a beam 50 from the nadir;l

Figure 6 is an inverted section at reduced scale taken on the plane 6 6 ofV Figure 1, showing the internal marking of the lamp carrier;

Figure 7 is a section, at reduced scale, taken on the line 7 7 of Figures l and 8, illustrating the captive levers for supporting the movable parts of the fixture from the plaster ring;

Figures 8 and 9 are fragmentary, sectional views taken on the lines 8 8 of Figure 7,V and 9 9 of Figure 6, respectively;

Figures 10 and ll Vare diagrammatic vertical and plan views illustratingthe adjustments available in the fixture;

Figure l2 is a diagram illustrating the sighting of the xture on an object; and

Figures 13 and 14 are fragmentary views of modied forms of construction suitable for larger lamps.

In Figure l a conventional ceiling is illustrated at C. To it is secured a plaster ring 10. This ring has an upwardly facing annular trough 11 to receive supporting levers,'to be described, a bottom linishing ange 11. engaging the lower surface of the ceiling, a stop member 12a extending inwardly and a plurality of bendable straps 13 or other suitable supports engaging the upper face of the ceiling.

This plaster ring supports a lamp box generally indicated at 15 which can be turned through substantially 360 about a vertical axis X-X. As the lamp box is for the purpose of housing the lamp and supporting the lamp carrier, its shape is not critical.

The sides of the lamp box shown in the drawings lie approximately in the frustum of a Vcone which approximates a cylinder. It has sloping side Walls 16 secured to a dat bottom plate 17 by clips 18. The bottom plate ts in the ange 12 of the plaster ring and the lamp box is ladapted to be passed up into the plaster ring from below. The plaster ring and box walls are usually made from sheet steel.

The supports for the lamp box include two'captive rockers 19, 19 (Figs. 7 and 8), which have outer ends 20 adapted to overlie the inner upper rim of the plaster ring and inner ends 21 inside the lamp box. These inner ends carry jack screws 22V bearing on the plate 17 so that the rockers maybe swung out to the full line position of Fig. 6 or swung back to the dotted line position to permit insertionrof the lamp box, or its removal. It is thus possible to support the lamp box for adjustnient about the vertical axis. A'stop 17a carried by the plate 1-7 .engages stop 12a so as to prevent'turning it more than 360. j

The sloping axis of the lamp box Walls is indicated at Z-Z, Figs. 1 and l0. it is here shown at 30 from-the vertical axis X X. A lesser angle, for example 22%,",

may be selected Wherenarrower areas are to be covered?" The top of the box walls is cut in a plane at right angles to this slopingraxis. Walls is a top plate or cover 23, preferably iny the form of an aluminum casting and provided with heat radiating tins 23'. Its outside diameter is vshown slightlygreater than that of the upper end of the tube 16. It rests on this tube and is guided for angular Vmovement about the axis Z-Z by an outside boss or lug 23aiand `two inside' bosses or lugs 23b, and

clips

24a, 24h, 24C carried by the side Walls of the tube 16. The-clip 24a provides a pointera'nd carries a clamp screw`25"accessible from` the attic. The

Across the top ofthe box vbe elongated, as indicated at 30".

3 Y clips 2b anclflcd arenarrower. i Anotch/Ztv inthe cover plate 23 facilitates assembly and disassembly for lamp renewal. As the fixture may be operated and serviced from below, aclamping.screwj27 .isfprovided as shown in Figures-f1, 6 V'and 9."` Itis opposite the V.outside vboss 23a.

The cover v23fforms a lamp carrier. Av lamp socket,28 and a projector lamp 29 are carried by Ithe cover 23 with the lamp axis LL at an angle r60 to the sloperof the cover 23. Here, axis L-Lis slightly osetfrom axis X-X. The lamp'shown is a PAR-38-150 watt ilood or spot lamp. Y

When the lamp is in its uppermost position in Figs. 1, 2 and 4, as shown in full lines, the axis L-L is vertical and the light beam has tilt and is ,projected `clown through the central hole or aperture 3,0 in vplate 17. This aperture is slightly off center to better allow the tilted beam to'escape. The cover or lamp carrier 23 can be turned about the sloping axis Z-Z, .FiguresV 1 and 10, so that the lamp .axis traverses a cone and the lamp axis is brought to the position L', L', Figures 1 and 10, Whereupon Vthe light beam projected from the lamp below the ceiling will he about 60 above the nadir. Suitablemeans may be provided to prevent turning the cover 23 through more than 360. In the construction shown, the kscrew engages the conduit fitting 31 for this purpose.

Reference is now made to Figures 10 and 11, which diagrammatically show the adjustments possible. Here,

loosened, the entire lamp box can be turned about the TighteningY vertical axis to elect azimuthal adjustment. the

screws

22 and 27 then assures that setting and lamp lrenewals may be effected without disturbing the settings.

When access to the fixture is to be had only throughthe attic, all adjustments and lamp renewals must be reffected from above. To make it possible to aim the fixture, the

' lamp carrier 23 is provided with a peephole 33, 180 from the vertical axis about which the entire lamp box turns is indicated at X--X. The axis of the cone through which the lamp axis L-L passes when turned about oblique axis Z-Z is indicated at Z-Z. The lower trace line L'-L of the lamp axis shows how low the lamp can be adjusted and how high the beam'may be directed. After converging to an apex and passing through the aperture in the plate, the central ray of the beam divergesfrom the vertical and also lies in a cone.

When the lamp is in the vertical axis X-X, the spot of light produced in a horizontal work surface is indicated by the small central circle', Fig. 11. If the carrier is turned through 180, the spot is thus centered about the point where line L'- meets the floor. This spot will If the carrier 23 is turned in a clockwise direction viewed from above, the spot 30 will move over the floor in Van elliptical path, as indicated at 40, in a clockwise direction. By, shifting the carrier back and forth through 180, it will traverse one half of the ellipse as it sweeps across the `region between nadir and 60 from nadir. For reasons to be set forth, it is preferable to be able to turn it through substantially 360, asindicated.

When the structure is turned about the vertical axis X-X, the axis Z-Z traverses cones up to 120' apex angle, and the axis L"-L traverses the shell of a cone up to 60 from the nadir. The spot 30 may be made to traverse circles 41, Fig. 11, marked with the angle of beam slope. By concurrent adjustment of the lamp box about the plaster ring and of the'lamp carrier about the lamp box, the spot of light may be placed in any azimuthal direction and aty any displaced position from nadir within the range provided. Y

When the adjustmentV is for an intermediate .beam angle, such-as `50 indicated in Figures 4 and 5, and in Figure 11, it is possible to have light strike ia spot from either of two adjustments, depending upon whether the 4peephole is turned to its one 50 position as shown in full lines of Figure 4, or itsother position, '.as indicated in dotted lines. When the cover is turned to 180, the aim'is correspondingly changed.

the lamp mounting. An observer can look through thisV sight opening as indicated in Figure 12, and through the opening 30 can-see where a lamp in that axis will project the light beam. Y

The carrier23is' provided with two sets of angle indicia, one for the peephole tilt and one for the lamp tilt. One way of arranging such indicia is shownlin Figs. 2 and 3.

In Figure 2 the full lines show the lamp .in the vertical axis with 0 tilt, and light goes directly down through hole 30 in plate 17. The peephole is then at a 60 tilt.

The reverse position is indicated in full lines in 1"ig.,3,V

Where the peephole is over the hole 31 and one'sees a spot directly below the xture.

Shouldone wish to aim the lamp from above in 'a to a position such as the 50 position of Fig. 4. He

would then observe the reading of the peephole legend opposite the pointer. The carrier would then be removed to afford access to screws 22, these screws tightened, the cover restored and turned, as shown in Fig,-

ure 5, to bring the corresponding lamp tilt indicia opposite the pointer. The lamp axis now is where the sight line formely was. By having the indicia Yin du.- plicate and the cover adjustable through nearly 36.0, the covercan be turned in either direction from the stop and cause the spot of light to at 40 in Figurell. Y

Where a 200 watt PAR-46 flood or Vspot lamp is de; sired, the construction shown in Figure 13 may beused. rlfhe same lamp box 16 and cover 23 are employed. The lamp 50 is carried in a spider 51 supported by screws 52 and spacer from the top of the cover 23. The cable tting is indicated at 53. Here, the jamb screw 25' is indicated at. the top of the lamp box and it engages the nut 5.4iV on the locking bolt.

Where the ixture is to accommodate a 300 Watt lamp, it is made larger. Figure 13 shows a PAR-56 prong in place in cover 62, by a bolt 63. i

Since it is obvious that the invention may be embodiedV in other forms and constructions within the scope Aof the claims, I wish it to he understood that the particular v form shown is but one of these forms, and various modih cations and changes being possible, I do nototherwise llmit myself in anyway with respect thereto.

What is claimed is: Y

1. A lighting fixture comprising a xed horizontal sup# porting ring, an oblique tubular'lamp box having a bottom horizontal closure plate with a central aperture and side walls extending up through the ring, means to secure the lamp box to the ring for turning about a vertical axis, an obliquely disposed top plate secured to the` lamp box for rotation about an axis extending obliquelyrup Y ward from a point near the center of the ring, and a pro-V.

jector type lamp bulb carried by the top plate for movetraverse the pathv indicated ment therewith and having the axis thereof disposed at an angle to the axis of rotation of the upper plate equal to the inclination of said axis of rotation of the upper plate whereby the lamp axis, upon turning of the upper plate, may be shifted through a conical path and between angles to the nadir from zero to twice the angle of slope of the axis of rotation of the upper plate, and the light beam projected through said aperture at various angles of tilt and whereby, upon turning of the lamp box about in the ring, the light beam may be projected in various azimuthal directions.

2. A lighting fixture comprising an annular supporting ring adapted to be secured in an opening in the ceiling, a xture body including a horizontal, centrally apertured plate tted to the ring to rotate therein about a vertical axis substantially central of the aperture, and having a tubular, oblique, Wall-forming portion terminating in an oblique plane at substantially right angles to the axis of the wall-forming portion with its uppermost portion substantially vertically over the center of the ring, means to secure the xture body to the ring for movement through substantially 360 about the ring axis, a cover secured to the upper end of the wall-forming portion and secured thereto for rotation about the oblique axis of the wall-forming portion, a lamp secured to the cover near the periphery thereof inside the body forming portion and with its axis with such an angle to the general plane of the cover plate that when the cover plate is turned about the said oblique axis the lamp axis traverses a cone whose steepest trace is vertical and whose lowest trace is at an angle to the Vertical twice the angle of Obliquity of the oblique axis.

References 'Cited in the le of this patent UNITED STATES PATENTS 2,214,473 Mann Sept. 10, 1940 2,243,712 Levy May 27, 1941 2,330,935 Tuck Oct. 5, 1943 2,567,291 Lundquist Sept. 11, 1951 2,716,185 Burliuk et al. Aug. 23, 1955 2,763,774 Beach et al. Sept. 18, 1956