New! View global litigation for patent families

US2309059A - Lighting fixture - Google Patents

Lighting fixture Download PDF

Info

Publication number
US2309059A
US2309059A US40807941A US2309059A US 2309059 A US2309059 A US 2309059A US 40807941 A US40807941 A US 40807941A US 2309059 A US2309059 A US 2309059A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
panels
light
tube
end
tubes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Inventor
Robert E Friend
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NORDBERG Manufacturing CO
Original Assignee
NORDBERG Manufacturing CO
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/04Optical design
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00Elongate light sources, e.g. fluorescent tubes

Description

Jam 19 1943. I v E. FZRIENVD 2,399,059-

LIGHTING FIXTURE Filed Aug. 23, 1941' (It tornegs "Patented Jan. 19, 1943 UNITED STATES {PATENT ()FFICE' LIGHTING FIXTURE Robert E. Friend, Milwaukee, Wis., assignor to Nordberg Manufacturing Company, Milwaukee, Wis., a corporation of Wisconsin Application August 23, 1941, Serial No. 408,079 2 Claims. (01.240-78) This invention relates to lighting fixtures, particularly fixtures for enclosing horizontal tube lights, such as fluorescent tube lights now coming into extensive use. Since the tubes a e Op q and will cast a shadow, the full utilization of the light from a horizontal tube requires either the use of a special form of reflector or some arrangement which will avail of indirect lighting as well as direct. The invention takes account of this fact and also meets the requirement char,- acteristic of tube lights, that the light tubes must extend substantially continuously across the lighted space, because they do not afford good dispersion of light far beyond the ends of the tubes.

The invention provides a fixture of attractive appearance, which conforms to the principles of functional design, and which may be used as a single unit or may be assembled end to end with similar units to produce diffused lighting fixtures extending the entire length or width of a space to be lighted. The invention so arranges the tube lights with reference to a diffusing reflector and an enclosing light transmitting case that good diifused direct lighting and good indirect lighting are both afforded by the fixture.

The invention will now be described by reference to the accompanying drawing, in which:

Fig. 1 is a perspective view of the complete fixture;

Fig. 2 is a longitudinal axial section taken on a vertical plane;

Fig. 3 is a. section on the line 33 of Fig. 2; and

Fig. 4 is a section on the line 4-4 of Fig. 2.

The end plates of the fixture comprise the rectangular panel ll sustained by a narrow web l2 which is flanged as indicated at l3 and notched at M to engage fixture studs or other means for connecting the fixture to the ceiling. Thereotangular panel II is flanged along its vertical edges and across its lower edge as indicated at l5, and the two end panels are connected by longitudinally extending angle bars [6 which are welded to both end panels. The panels II are further tied together and braced by a sheet metal reflector element H which is coated on its outer surf-ace with white enamel to give it a combined light reflecting and diffusing characteristic. The

two faces of the triangular portion which are indicated by the numbers l8 and I9 in Fig. 3 are preferably at approximately 90 to each other.

The reflector structure generally indicated by the numeral I 1 has end portions which, in Figure 2, are generally indicated by the reference'numerals 2|, 22. These end portions are preferably formed with five sides as indicated in Figure 4, one purpose of so forming the end portions being to form convenient points for attachment of the brackets 23 which carry tube sockets 24 of any suitable form. No attempt is here made to illustrate the tube sockets in detail.

Brackets are provided for three tubes. The upper tubes 25 are parallel with and near the upper margin of the faces l8, IQ of the central or main reflecting portion of the reflector. The third tube 26 is a short distance below the angle between the surfaces l8, l9. This third tube may be omitted. In some cases, it will be found desirable to provide a separate control for the tube 28 so that it may or may not be lighted at the same time that the tubes 25 are lighted. A cover member 21 formed with ventilating louvers 28 cl0ses the top of the reflector element. It will be understood that the reflector element may be used to house transformers or other accessory apparatus used with tube lights. No attempt to illustrate such apparatus in the drawing has been made. It is not a part of the invention and would be conventional, in any event.

The cover member 21 is provided with flanged seats 29 on its opposite sides to receive the cover glass hereinafter described. Resting on the bottom flanges l5 of the end panels and on the angle bars I6 is a panel of translucent light diffusing material. Various transparent or translucent plastics might be used, but I prefer glass having rounded ribs, the ribs running longitudinally so that they are parallel with the tubes and afford diffusion in directions transverse to the tubes. However, sanded glass or glass having some diffusing pattern on one or both surfaces may be used. This bottom panel is indicated at 32, 33, the panel being made in two approximately equal separate portions so that one may be lifted and slid over the other, permitting access to either or simultaneously to both ends of the reflector. This is a desirable way of permitting access to the tubes and tube receptacles for adjustment or replacement.

The side panels 34 of similar light diffusing translucent material are mounted as shown and are retained by the clips 35 which are welded to portions of the end plates I I. Where the glass is ribbed I prefer that the ribs run longitudinally, that is, parallel with the lighting tubes. Seated on the upper edges of the side panels 34 and upon the seats 29 formed in the cover 21 are two panes of transparent material. Any transparent plastic might be used. Clear glass is preferred. The

panels are indicated at 36. It is contemplated that the fixture will be hung beneath a ceiling which is white or some light color, and as a consequence is a good light diffusing reflector. It follows that the light from the bottom and outer side of the tubes 25 will afford direct lighting which is diffused by the action of the panels 32, 33 and 34. Light passing from the inner side of the tubes 25 and from the top of tube 26 will be diffused and reflected by the surfaces [8, I9. Light from the bottom of tube 26 will afford direct illumination with diflusion by the panels 32, 33. Light leaving the top of the tubes 25 and possibly also some of the light from upper portions of the tube 26 will pass through the panels 36 without diffusion and will be diffusely reflected from the ceiling.

It will be observed that the tubes are so arranged that all direct lighting will be evenly dispersed. The light reflected from the surfaces l8, l9 will not be seriously obstructed by the tubes themselves. All light passing upward to the ceiling will be subject to diflusing reflection from the ceiling, the effect being to afford a satisfactory supplemental indirect illumination.

The advantages of the arrangement are good appearance, a good combination of direct and indirect illumination, complete enclosure of the lighting units in a fire proof enclosure, and ready accessibility of the lighting tubes for any necessary purpose. The various light transmitting panels can be removed readily from the fixture for cleaning or replacement. The frame work of this fixture obstructs the light in a minimum degree.

While the one embodiment of the invention has been described in considerable detail, this is for purpose of explanation and not with the intention of implying a limitation to the specific form shown. Changes within the scope of the appended claims are contemplated.

I claim:

1. In a tube lighting fixture, the combination of supporting end panels having upward extensions for connection with a ceiling; corner bars connecting the lower corners of said end panels; a bottom and two side panels of light transmitting and diffusing material, all removably supported at least in part by said corner bars, the bottom panel comprising two sections one of which may be lifted and slid over the other; a reflector V-shaped in cross-section extending horizontally between said end panels and rigidly connected to each; a removable cover for said reflector element, having lateral seats; panels of light transmitting material supported on said seats and on the upper edges of the side panels; and at least two tube lights, one mounted at each side of said reflector and near the upper margin thereof.

2. In a tube lighting fixture, the combination of supporting end panels having upward extensions for connection with a ceiling; corner bars connecting the lower corners of said end panels; a bottom and two side panels of light transmitting and diffusing material, all supported at least in part by said corner bars, the bottom panel comprising two sections resting in the corner bars, whereby they are rendered removable through the bottom by sliding one over the other and tilting them to clear the corner bars; a reflector V shaped in cross-section extending horizontally between said end panels and rigidly connected to each; a removable cover for said reflector element, having lateral seats; panels of light transmitting material supported on said seats and on the upper edges of the side panels; and tube lights mounted to extend lengthwise of said reflector, at the sides and near the upper margin thereof.

ROBERT E. FRIEND.

US2309059A 1941-08-23 1941-08-23 Lighting fixture Expired - Lifetime US2309059A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US2309059A US2309059A (en) 1941-08-23 1941-08-23 Lighting fixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2309059A US2309059A (en) 1941-08-23 1941-08-23 Lighting fixture

Publications (1)

Publication Number Publication Date
US2309059A true US2309059A (en) 1943-01-19

Family

ID=23614787

Family Applications (1)

Application Number Title Priority Date Filing Date
US2309059A Expired - Lifetime US2309059A (en) 1941-08-23 1941-08-23 Lighting fixture

Country Status (1)

Country Link
US (1) US2309059A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465141A (en) * 1944-11-15 1949-03-22 F W Wakefield Brass Company Lighting fixture for tubular lamps
US2466223A (en) * 1945-08-22 1949-04-05 Kenneth L Francis Fluorescent lamp fixture
US2474308A (en) * 1946-11-29 1949-06-28 Holophane Co Inc Surface attached lighting equipment
US2525556A (en) * 1950-02-28 1950-10-10 Sylvania Electric Prod Fluorescent lighting fixture having removable light-controlling panels at the sides thereof
US2606998A (en) * 1947-07-31 1952-08-12 Westinghouse Electric Corp Luminaire for elongated tubular lamps
US2625646A (en) * 1949-03-09 1953-01-13 Mitchell Mfg Company Lighting fixture which may be used individually or attached to similar fixture
US2659811A (en) * 1947-03-12 1953-11-17 F W Wakefield Brass Company Luminaire for elongated tubular lamps
US2662649A (en) * 1951-07-27 1953-12-15 American Can Co Shipping package
US3033981A (en) * 1959-12-07 1962-05-08 Leonard H Kushner Lighting fixtures
US4587600A (en) * 1985-04-30 1986-05-06 John Morten Lighting fixture

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465141A (en) * 1944-11-15 1949-03-22 F W Wakefield Brass Company Lighting fixture for tubular lamps
US2466223A (en) * 1945-08-22 1949-04-05 Kenneth L Francis Fluorescent lamp fixture
US2474308A (en) * 1946-11-29 1949-06-28 Holophane Co Inc Surface attached lighting equipment
US2659811A (en) * 1947-03-12 1953-11-17 F W Wakefield Brass Company Luminaire for elongated tubular lamps
US2606998A (en) * 1947-07-31 1952-08-12 Westinghouse Electric Corp Luminaire for elongated tubular lamps
US2625646A (en) * 1949-03-09 1953-01-13 Mitchell Mfg Company Lighting fixture which may be used individually or attached to similar fixture
US2525556A (en) * 1950-02-28 1950-10-10 Sylvania Electric Prod Fluorescent lighting fixture having removable light-controlling panels at the sides thereof
US2662649A (en) * 1951-07-27 1953-12-15 American Can Co Shipping package
US3033981A (en) * 1959-12-07 1962-05-08 Leonard H Kushner Lighting fixtures
US4587600A (en) * 1985-04-30 1986-05-06 John Morten Lighting fixture

Similar Documents

Publication Publication Date Title
US3647148A (en) Veiling glare control with luminaires
US3539801A (en) Light fixture
US3560729A (en) Lighting fixture
US3460299A (en) Luminous sound absorbing ceiling
US3389246A (en) Illuminated wall partition divider
US4229782A (en) High efficiency lighting units with beam cut-off angle
US5075827A (en) Indirect light fixture amplification reflector system
US4300185A (en) Light fixture unit for open plan office
US4561203A (en) Opaque sign plaque with dual reflector illumination
US5777857A (en) Energy efficient lighting system
US4461205A (en) Combination lighting and filtering unit for a clean room
US3591798A (en) Lighting fixture
US3755665A (en) Floodlight
US4161019A (en) Lighting fixture
US3131871A (en) Combination rail and luminaire
US2334005A (en) Illuminating fixture
US3010378A (en) Lighting and ventilating system
US7607812B2 (en) Light-emitting diode panel fixture
US5412551A (en) Luminaire fixture
US3065686A (en) Lighting and ventilating fixture
US20090021927A1 (en) Refrigerator shelf led lighting
US5473522A (en) Modular luminaire
US2991708A (en) Combined space lighting and ventilating apparatus
US3019333A (en) Lighting fixture troffer and latch therefor
US3321877A (en) Acoustic ceiling