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Publication numberUS3928757 A
Publication typeGrant
Publication date23 Dec 1975
Filing date17 Apr 1973
Priority date26 May 1972
Publication numberUS 3928757 A, US 3928757A, US-A-3928757, US3928757 A, US3928757A
InventorsPaul Nelson
Original AssigneePaul Nelson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Spot light fixture
US 3928757 A
Abstract
A ceiling unit comprised of a pair of laterally spaced parallel fluorescent lamps provided with reflectors to respectively direct the light therefrom toward the ceiling and a pair of incandescent spot-light lamps between the fluroescent lamps, a first lamp directing the light therefrom downwardly and the other at an angle toward the light path of the first lamp.
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Description  (OCR text may contain errors)

0 United States Patent 1 1 1111 3,928,757

Nelson Dec. 23, 1975 SPOT LIGHT FIXTURE 2,557,129 6/1951 McDaid 240/51.11 R x 2,625,646 l/l953 Goebel... 240/9 R [76] Inventor. Paul Nelson, 34 Allee Emm 2,647,985 8/1953 Biller 240/51.11 R Chabaer, Parc Roy d Espagne, 2,654,830 10/1953 Runge et al 240/9 R x Marsellle, France 22 Fl A 17 1973 FOREIGN PATENTS OR APPLICATIONS 1 l e 1,533,444 6/1968 France 240/51.11 R [21] Appl. NO.Z 351,844 1,521,503 3/1968 France 240/51.11 R

Primary Examiner-Richard L. Moses [30] Foreign Apphcauon Pnonty Data Attorney, Agent, or Firm-William Anthony Drucker May 26, 1972 France 72.19622 52 US. Cl. 240/51.11 R; 240/9 R; 240/41.1; [57] ABSTRACT 240/41 6; 240/78 R A ceiling unit comprised of a pair of laterally spaced [51] Int. Cl. H05b 33/02 parallel fluorescent mp pr h r fl tors o [58] Field of Search 240/9 R, 51,11 R, 41 R, respectively direct the light therefrom toward the ceil- 240/1 4, 41,6, 78 R, 78 DA, 41 1 ing and a pair of incandescent spot-light lamps between the fluroescent lamps, a first lamp directing the [56] References Cit d light therefrom downwardly and the other at an angle UNITED STATES PATENTS toward the light path of the first lamp. 2,313,131 3/1943 Elias 240/51.11 R 2 Claims, 6 Drawing Figures US. Patent Dec. 23, 1975 3,928,757

SPOT LIGHT FIXTURE The invention relates to a ceiling device intended for lighting wards in hospitals, clinics and similar places.

In the devices hitherto known, use was made for traditional lighting of bedside lamps, bedstead lamps and ceiling lamps; for purposes of examinations or applying dressings, portable lamps were used, but in any case there was no universal, simplified and functional lighting system meeting all the needs of a bedridden patient.

The device according to the invention does away with these drawbacks and makes it possible, starting from the provision of a lighting unit, to effect a homo geneous, multi-directional area of light illuminating the whole of the surface, in spite of screens that may be interposed, so as to do away with casting of shadows and thereby assisting clinical examinations, care,observation of sores and the invalids complexion, without change in colour, while enabling the patient to read in any position, even away from the background wall, and without the neighbours being able to perceive directly the sources of light.

It consists of the combination of (i) direct axial projection by adjustable incandescent lamp, positioned at appropriate intervals for vertical emission and oblique emission, and (ii) indirect bilateral projection by luminescent tubes, whose flux is thrown on to the ceiling, each source of light being arranged to be lit simultaneously, separately or combined with one another to meet all practical requirements.

The accompanying drawings, given by way of nonrestrictive example of one of the forms of carrying out the object of the invention, show:

FIGS. 1, 2 the lighting unit in cross-section and elevation;

FIGS. 3 and 4 the whole of the ceiling unit in longitudinal sectionand elevation;

FIGS. 5 and 6 one of the applications of the device.

The ceiling fitting (FIGS. 1, 2,3, 4) consists of a central casing l in which are mounted two jointed slewable incandescent or spot lights, 2, 3 and provided with directional reflectors 4, 5 and 6, 7.

The shade 6 is vertical and the shade 7 slightly oblique to the light path from shade 6 at an angle of about 60. On the lateral faces of the casing 1 are mounted the luminescent tubes 8, 9' inside the casings 10, 11,-provided with reflectors 12, 13 shown in crosssection and transparent protecting walls 14, 15.

Ventilating hoods l6, l7, 18 are provided on the lateral surfaces and on the longitudinal surfaces 19. There are then obtained direct beams of light A B as shown by arrows in FIG. 3 and the indirect projections C D, as shown by the arrows in FIG. 1, which ensure a luminous environment by reflection on the ceiling.

These combined light fluxes make it possible, according to the example given in FIGS. 5 and 6, for a person seated away from the wall to read in positions 20, 21, 22 of FIG. 5.

Likewise, a person seated in the positions 23, 24, 25, 26 will be able to read without any trouble with lighting that does not cast a shadow.

For medical attention, dressings, and examinations, the lighting unit provides with the maximum of clarity the lighting of the portion to be treated. It is also possible to condition the lighting to create a determined environment, enabling the patient to be seen as he is.

It is also possible to vary the intensity of lighting, by lighting for instance one or two fluorescent tubes without the incandescent lighting, or by using both and a single incandescent light combined or not with one of the two indirect lighting elements.

The shapes, dimensions and arrangements of the different components may vary within the limit of equivalence, as moreover the materials used for their manufacture, without thereby changing the general concept of the invention that had just been described.

I claim:

1. An overhead lighting fixture comprising, in combination,

a housing provided with a first pair of laterally spaced elongated casings and a second central elongated casing,

a pair of parallel coextensive fluorescent lamp tubes respectively supported within said first pair of casings,

means including a separate reflector below each tube to provide for directing the light therefrom at an angle to the ceiling, the directed light having vertical and oppositely directed lateral components away from the first pair of respective casings,

a .pair of incandescent spotlight lamps within the elongated central casing and spaced therealong,

means supporting one of said spotlight lamps in said elongated central casing to project the light therefrom without obstruction in a downwardly vertical direction, and

means supporting the other of said spotlight lamps in said elongated central casing for projecting the light therefrom without obstruction in an oblique direction both downwardly and toward the one spotlight.

2. An overhead lighting fixture according to claim 1 wherein said spotlight lamps are provided with reflectors and shades for directing the light from the incandescent lamps in said respective directions, the light transmission paths of said incandescent lamps being at an angle of 60 to each other.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2313131 *26 Feb 19419 Mar 1943Michael Angelo EliasLighting fixture
US2557129 *1 Jun 194819 Jun 1951Toole Woodward Engineering ComSpot lighting unit
US2625646 *9 Mar 194913 Jan 1953Mitchell Mfg CompanyLighting fixture which may be used individually or attached to similar fixture
US2647985 *24 Dec 19474 Aug 1953Day Brite Lighting IncIllumination fixture and louvers therefor
US2654830 *13 Nov 19476 Oct 1953Miller CoDirect lighting equipment
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4159511 *30 Nov 197726 Jun 1979Societe Parisienne des Anciens Etablissements Bariber, Benard & TurenneShadowless lighting appliance for surgical operating theatres and the like
US4344111 *8 Aug 198010 Aug 1982Mcgraw-Edison CompanyHigh efficiency lighting units and systems using same
US4554619 *9 Oct 198419 Nov 1985Semperlux GmbhLamp with a linear light source
US4803606 *14 Jul 19877 Feb 1989Karl RotterMobile universal shop light
US5038254 *18 Dec 19906 Aug 1991Keene CorporationIntegrated medical light system
US5086375 *30 Apr 19914 Feb 1992Keene CorporationModular medical light system
US5160193 *4 Feb 19923 Nov 1992Keene CorporationModular medical light system
US5539626 *8 Apr 199423 Jul 1996Delma Electro-Und Medizinische Apparatebau Gesellschaft MbhOperating theater lamp
US617659730 Mar 199823 Jan 2001Hill-Rom, Inc.Reflector for surgical light apparatus
US686342225 Feb 20038 Mar 2005Steris Inc.Ergonomic controls in a surgical lighting system
US686641025 Feb 200315 Mar 2005Steris, Inc.Ambient lighting system for surgical lights
US698405517 Sep 200410 Jan 2006Kenall Manufacturing CompanySelectively-extendable modular lighting fixture and method
US7401944 *24 Aug 200522 Jul 2008Dräger Medical AG & Co. KGaAOperating room light fixture having two light sources and a control unit
US795083317 Jun 200831 May 2011Genlyte Thomas Group LlcSplay frame luminaire
US855065629 Jan 20098 Oct 2013Kenall Manufacturing CompanySelectively-extendable modular lighting fixture
US944181119 Aug 201113 Sep 2016Research Triangle InstituteLighting devices utilizing optical waveguides and remote light converters, and related methods
US947655025 Sep 201325 Oct 2016Kenall Manufacturing CompanySelectively-extendable modular lighting fixture
US9562671 *19 Aug 20117 Feb 2017Research Triangle InstituteColor-tunable lighting devices and methods of use
US20030160142 *25 Feb 200328 Aug 2003Steris Inc. & Ondal Industrietechnik GmbhSurgical suspension system
US20030210559 *25 Feb 200313 Nov 2003Steris Inc.Ergonomic controls in a surgical lighting system
US20050041432 *17 Sep 200424 Feb 2005Mccarthy Charles A.Selectively-extendable modular lighting fixture and method
US20050242261 *9 Feb 20053 Nov 2005Steris IncSurgical suspension system
US20060109650 *24 Aug 200525 May 2006Dräger Medical AG & Co. KGaAOperating room light fixture
US20130215597 *19 Aug 201122 Aug 2013Research Triangle Institute, InternationalColor-tunable lighting devices and methods for tuning color output of lighting devices
USRE455635 Sep 201316 Jun 2015Kenall Manufacturing CompanySelectively-extendable modular lighting fixture and method
USRE455915 Sep 201330 Jun 2015Kenall Manufacturing CompanySelectively-extendable modular lighting fixture and method
EP2669572A1 *28 May 20134 Dec 2013TRILUX Medical GmbH & Co. KGSupply unit with a lighting system
Classifications
U.S. Classification362/228, 362/247, 362/804
International ClassificationF21V33/00, F21S8/04, F21S8/00
Cooperative ClassificationY10S362/804, F21S8/04, F21V33/0072, F21Y2113/00
European ClassificationF21S8/04, F21V33/00D2B