US1286535A - Lighting-fixture. - Google Patents

Description

w. E. COCHRAN. LIGHTING FIXTURE.

APPLICATION FILED DEC. 19. 19!]- 00 1 9 I 3 0w 6 D d 6 t H E t a D1 rye eases.

- ing fixtures.

The primary object .zof'the invention is- --a field of illumination of Cleveland, in the county wnsnn'r n. coonnan, or cnnvnnann, oI-rro.

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To all whom it may concern: v Be it known that I, WESLEY E. COGHRAN, a citizen of the United States, residing at State of Uhio; have invented certain new and useful Improvements in Light ng-Fixtures, or which the following is a sp'ecification.

My invention relates to improvements in lighting fixtures, and more, .articularly to that class or type known'as indirect lightthe provision of a generally improved fixture of this class which will be exceedingly simple in construction, cheap of manufacture, and efficient in use.

A further object is the lprovision of-a more openv double reflector comprising two optil positely extending connected or truncated conoidal reflectors having their constricted or truncated portions 'surrounding'the source horizontal-plane, said conoidal reflectors being arranged in cooperative relation to the source of illumination and the overhanging main or canopy reflector, and being particularly adapted for use in lieu of and as an improvement 'on the ordinary bowl-shaped secondary or pendant reflector now in common use in this class of lighting fixtures.

A still further object is the'provision of an improved fixture of this class particularly designed and adapted for use in connection with a lamp bulb of the nitrogen type now in extensive use, and which not onl gives a very intense light at its filament, ut has an elongated bulb stem. or. shank, and with this end in view, my invention further relates to an improved hollow ventilated main i Specification of Letters Patent. Application filed December w, 19l7 Serial No. 207,848.

of Cuyahoga and u material. of illumination in substantially the same u 'like parts throughout all the figures of the Patented Dee. a, rate,

or canopy reflector, together with improved means for assembling and connecting'the. improved arts.v

A still an i proved fixture of this class which adap ed not only-to provide for a proper circu ation of air about the lamp bulb to cool and prolong the life of the latter, but one which isparticularly sanitary and safe in use, being particularly free from dust collecting openings or pockets, and at the same time presenting an ornamental and attractive outline and artistic appearance.

With the above mentioned and other ends in view, the invention consists in the novel construction, arrangement, and combination of parts,hereina'fter described, illustrated in one of its embodiments in the accompanying the appended claims i Referringto the drawings, forming apart of this specification, Figural, is a vertical central sectional view of a lighting fixture onstructed in accordance with this invention. v Fig. 2, a fragmentary sectional view of a slightly modified form of the improved secrth er. object is the provision of drawings, and particularly pointed out in ondary or open ended double reflector and showing the latter made of glass or vitreous Similar numerals of reference designate drawings. a

of any's'uitable and convenient form, but, in the present instance, is provided on its underside with an annular concaved portion adapted to deflect the light rays downvwardlya'nd outwardly therefrom as received from the subjacent source of illumination and secondary reflector as hereinafter described. The main or canopy reflector may "'be'suspended by means of a supporting thim- The main or canopy reflector 1, maybe socket 3. The lamp socket 3, in the present instance, is provided with alamp bulb 4, of the nitrogen type, and which therefore embodies a long orelongated neck portion 4 As the light at thefilament 4 is very intense, the usual reflector bowl of translucent material is suspended below the lamp bulb so as to prevent any direct rays from being projected directly downwardly and outwardly therefrom to come into contact with the eyes of any person or persons immediately below the lamp, but such pendant reflector bowls greatly impair the efliciency of the lamp because many of the direct rays are obviously lost or diffused.

Referring now to the present or improved reflector it will be seen that the same comprises a concentrically mounted open double reflector made up of upper and lower truncated conoidal reflectors 5 and 5 respectively, the constricted or truncated portions of the reflectors 5 and 5, being joined to form a constricted or ray diVidiIlg angular portion 5", arranged substantially in the same horizontal plane with thefilament 4 and preferably slightly above the central portion thereof, as shown. This arrangement permits thedirect rays 6, from the filament to pass directly downwardly and outwardly unobstructed through the open portion of the reflector 5*, and it will be obvious that the eyes of any occupant in the room being illuminated directly beneath such lamp are not likely to be reached by such substantially vertically extending rays, and any other rays extending at a greater or less acute angle such as therays 6, will strike the curved sides of the reflector 5 and be reflected down as thereflected rays 6..

As a means of cutting out any glaring rays from the main or canopy reflector 1, and particularly as a means of intercepting and reflecting such directlateral rays 6, emanating from and above the filament orlight source 4 which would otherwise pass directly beyond and beneath the canopy reflector 1, the upper conical reflector 5 is provided, said reflector 5, being adapted to reflect such rays upwardly against the main or canopy reflector and to be reprojected by the latter as therays 6 while stillother rays 6", as shown reach the main or canopy reflector directly and are reflected by the latter downwardly and outwardly as indicated. I It will be seen that the rays of light emanating from the filament or source of illumination 4:", at a very acute angle pass upwardly and downwardly therefrom without striking the reflectors 5 and 5, while those emanating at less acute angles to the respective axial planes of such reflectors are caught and reprojected by the latter as shown and above explained.

The double or open endedsecondary reflector may be suspended beneath the canopy reflector 1, in any suitable and convenient manner, and, in the present instance, by-

means of link rods 7, provided with hooks 7, connected to the central depending conical portion 1", of the main reflector and provided at their outer-ends with thumb nuts 7*, threaded thereon.

As a means of particularly adapting the improved fixture to alamp bulb 4, of the nitrogen type, the canopy reflector 1, comprises a hollow double walled structure having central openings 1, to receive theneck portion 4, and spaced therefrom to form air circulating passages, and as a means of ventilating the chamber formed between the walls of the canopy reflector, the supportingthimble 2, is provided withoutlet ports 2 While I hate shown the open ended double reflector as comprising two sheet metal conoidal reflectors 5 and 5, liavin theirtruncated portions connected to eacli other by means of a seam or joint to form the angular or reduced portion 5, as shown in Fig. 1, of the drawings, it will be apparent that these reflectors 5 and 5, may be made integral of glass or other suitable vitrious material as indicated in Fig. 2, of the drawings, and it will be understood that the interior surfaces of the reflectors 5 and 5, when made of metal are provided with a suitable refracting surface or coating, such for example as, white porcelain enamel, or the like, and so likewise as to the annular concaved portion 1, of the canopy reflector 1.

From the foregoing description, taken in connection with the accompanying drawings, the operation and advantages of my invention will be readily understood.

Having thus described one of the embodiments of my invention, what I claim and desire to secure by Letters Patent, is,-

1. A lighting fixture, comprising a canopy reflector, a light source, and upper and lower truncated open conoidal reflectors surrounding said light source, and having their light vintercepting and refracting portions above flector. or below at acute angles of-more than other intercepting such rays as extend in. forty-five degrees to the respectivefaxial planes of approximately forty-five degreesplanes of said reflectors. v and more to the common axial plane of said 3. In a lighting fixture, a light source, a, main and secondary reflectors e 5 main reflector, and a double open ended In testimony whereof I have. afiixed my 1% secondary reflector embodying truncated signature in the presence 'of two witnesses; conoids, one of said conoi'ds intercepting all WESLEY E. COCHRANL; such'rays of light emanatin from and above Witnesses: v ysaid lightsource which won (1 otherwise passf W. C. GRAVES,

it directly beneath said main reflector, and the 0. C. BILLMZAN.

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