US1351255A - Lighting-fixture - Google Patents

Description

A. LAZERSON.

LIGHTING FIXT URE.

, APPLICATION FILED JAN. 25; 1920.

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Ina/endanhaziafidazemm 2 A. LAZERSON.

LIGHTING FIXTURE.

APPLICATION FILED JAN. 26, 1920.

Patented Aug. 31, 1920.

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lnyenfar: fl$rasiamlazemwz To all whom it may concern:

' downwardly. 'A further object of the in-,

uNireo s'rarss ABRAHAM LAZERSON, or CHICAGO, mmoisf'Assrenortro 00., A GORQ RATION or'ILLINo'Is.

F Es SOLAR ILLUMINATIivG LIGHTING-FIXTURE.

7 Be it known. that I, ABRAHAMLAZERSON, a citizen of the United States, and resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Lighting-Fixtures, of which the following is a specification, and which are illustrated in the accompanying drawings, forming apart thereof. j I 'The invention relates to lighting fixtures and has as an object the provision of a fixture that will direct a large part of the light vention-is theprovision of a fixture which is well ventilated.

Illustrative embodiments of the invention are shownin the accompanying drawings, in which Figure 1" is a central vertical section through a fixture, parts being shown in elevation;

Fig. 2 is a horizontal section on line 2-2 of Fig. 1; v I

Fig. 3 is a side elevation of a modification, and

Fig. 4 is a central vertical section of the modification of Fig. 3 drawn to an enlarged scale, parts bein shown in elevation.

As shown in Figs. 1 and 2, the fixture comprises the usual canopy 10, carrying a collar, as 11, provided with set screws 12 for support of'a globe, as 13. A porcelain socket or receptacle 14 is shown supported in a usual manner as by screws 15 engaging with a strap 16 permanently secured at its ends to the canopy, as at 17, 18. V

For the purpose of directing downwardly a large part of the light emitted by a bulb, as 19, there is provided a globe, as 13, shown as substantially hemispherical, provided with a flat frusto conical plate, as 20, at its upper side, the body and plate being prefer V ably formed integral at their juncture. The

globe 13 including the plate 20' is desirably formed of opalescent glass. The plate portion 20 may, if desired, be coated on its exterior with some opaque material. The plate 20 is shown as provided with the usual roll 21 for engagement with the set screws 12. Since a large part of the rays from the bulb 19 which impinge upon the plate 20 will strike them at an angle in excess of the 'critical angle the most of the light which strikes the plate will be reflected in a direction below the horizontal. This effect is assisted by making the globe orat least the Specification of Letters latentfl Patented Aug, 1920.

Application filed January 26, 1920. Serial No. 353,964. i

plate 20. of a material havinga glazed sur- I face. a

For the purpose of reflecting downwardly the light which would otherwise pass upward into the interior of the canopy, a plate, as 22, is provided, shown as formed with an upwardly flaring rim 23 extended to meet-the inner surface of the canopy.- For ventilation holes asat 24.,and 25 may beprovided in the canopy and also holes in rim 23, as'at26. For more efficient reflection of light thelower surface of the plate 22 is desirably painted or enameled white, orthe' plate is formed of a white material. The plate' 22 is perforated as at 27' for passage of the neck of the electric bulb 19.

For thepurpose of-jsec-uring-the plate 22 inpositioma bar, as 28, maybe .placed across the upper portion of the interior of the canopy 10, may rest upon a shoulder thereof, as at 29, and may be caused to support plate 22 by bolts, one of whichis shown at 30, passed through holes-in the bar.28 and in the plate 22. The bar 28 may be provided with a screw threaded opening, as 31, for

reception of a fitting, not shown, for support of the entire fixture. p The fiat surface of the plate 22 being substantially aslarge as the opening in the center of the frusto conical plate 20 results in the provision of a downwardly directed reflecting surface over substantially the entire area'of the upper inclosure of the globe 13, and combined-with these reflecting surfaces is provisions for efiicient ventilation without which such a closed globe would not be used with a large capacity electric bulb. One of the wires for the fixture is indicated at 32.

The modification of Figs. 3 and 1 illustrates the embodiment of the invention in a fixture adapted to be suspended by a chain, as 33, with which chain the electric wires, not shown, may be intertwined, as is common. In this modification the metal bell 34 is shown as provided with a ring 35 for engagement with thech'ain 33 and is shown as scribed in connection with the modification.

their upper ends, as '39, shown as passed through ventilating openings 40. The depending skirting 4:1 is provided to conceal the openings 40 and the ends of the hooks 39; Lower ventilating openings 42 are shown as well as the openings 26 in the rim of plate 22, the latter as above described.

The relation of the globe 13 and the refleeting surface in the modification of Figs. 3 and 4 is in all respects similar to that of Figsl and 2.

I claim as my invention 1. A lighting fixture comprising, in combination, a canopy having a collaradapted to engage with a globe and-carrying means to securea globe in place, a plate having a reflecting-surface on its lower side, said plate of the same shape as and slightly less in diameter than said collar, said plate having an opening for passage of source of light parts, an outwardly flaring rim on said plate adapted to contact with the interior of the canopy, said rim having ventilating openings.

2. A lighting fixture comprising, in combination, a canopy having a collar adapted openings, and a'substantially closed globe having a flattened upper wall adapted to reflect light downwardly and having an opening at its center to pass over a source of light and engage with said collar.

3. A lighting fixture comprising, incombination,-a globe having a substantially fiat upper wall integral therewith, a canopy supporting said globe having inlet ventilating openings in its circumference adjacent its plane of engagement with the bowl, a plate fitting within said canopy having an open-' ing for a source of light element, a plane central portion and an upwardly and outwardly flaring rim contacting with said canopy above said openings, said rim having ventilating openings and outlet venti lating openings in said canopy above said plate.

ABRAHAM LAZERSON.

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