US1304387A - Lighting-fixture - Google Patents

Description

A. S'JECHFHEJi LIGHTING FIXTURE.

APPLICATION mmxune 2s.- ma.

Patented May 20, 1919.

' ALBERTv sEcHRrstr, or DENVER, COLORADO.

41.marciales-EIx'rURE.

Specification of Letters Patent.

' Patented May 2o, 1919.

Application led I une 25, 1918. Serial No. 241,744.

To all whom t may concern.' Y

Be it known that I, ALBERT SEorInrsTa citizen ofthe United States, residing at the city and county of Denver and State of Colorado, havevinvented certain new and useful Improvements in Lighting-Fixtures g and I do declare thev following lto-be a full,

clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon,'which form apart of this specification.

My invention relates to improvements in lighting fixtures, my object being to pro-v vide a device of this character adapted to utilize to the desired extent the indirect rays of light and at the same time make use of the direct rays tothe greatest possible extent consistent with the use to which the fixture is applied. Heretofore, the common fixture for indirect lighting has embodied a' translucent glass bowl of such character as to soften the rays of light which pass therethrough, while the other or indirectV rays are'relected from a reflecting surface above the bowl and below which projectsy the lamp which the bowl surrounds.

My improvement is more especially adapted for use for lighting shops, store houses and work rooms where it is exceedingly important to effect economy in the highest degree and consequently, my improvement is constructed with reference to utilizing the direct rays of light as far as possible, since to the extent that the direct rays lmay be used without detriment orl annoyance to those who occupy therooms to be lighted, the greater will be the lighting economy.

Having this idea in mind, instead of employing a bowl closed at the bottom I provide an opaque cylinder open at the bottom as well as at the top and into which the lamp projects, the cylindrical member being suspended from a reflector above, the reector being supported from the 'lamp socket which in turn may be secured either to the ceiling or suspended therefrom as may be desired. The diameter and shape of the reflector and the diameter and length of the cylinder must be in correct proportion to the size of the lamp so that the direct rays of light from the filament of the lamp will be shielded fromthe eyes of the individual observer, and so that the maximum of reiected and diffused light will be projected-to cover the desired area to be lighted.

This construction and arrangement is based upon the principle that a person in a room to be lighted will not be annoyed by direct rays within a limited area directly below and surroundinga vertical line pass-` ing through the longitudinal center of the lamp, since under ordinary circumstances a person will not have occasion to direct his eyes toward the lamp on a vertical line or a line approaching the vertical. quently, the direct rays o-f light may be utilized through the open cylinder for lighting a considerable area directly below and lsurrounding the lamp without detriment or annoyance to those for whose benefit the lightl is employed. n y

Having briefly outlined my improvement, I will proceed to describe the same in detail reference being made to the accompanying drawing in which is illustrated an embodiment thereof. In this drawing:

Figure 1 is a vertical section taken through the reflector and cylindrical member of my improved fixture, the lamp and its socket being shown in elevation.

Fig. 2 is a section taken on the line 2 2, Fig. l, the parts being shown on a larger scale.

Fig. 3 is a view similar to Fig. 1 but showing a slightly modified form of construction. v

Fig. 4 is a section taken on' the line 4 4, Fig. 3, the socket and a fragment of the lamp being shown in elevation. l

The s ame reference characters indicate the same parts in all the views.

Referring rst more particularly to Fig. l

let the numeral 54 designate a reiector which has a central perforation 6 adapted to receivethe body 7 of a socket which is provided at its lower extremity with a collar 8 which forms a shoulder for supporting the reflector. As shown in this view, the lower surface of the reflector is concave, but it may also be convex, as illustrated in Fig. 3, if desired. From this reflector is suspended an opaque cylinder 9 which is open at the top to receive the lamp 10 which is connected to the socket, the cylinder being also open at the bottom for the escape of direct light rays from the lamp, these rays being employed to illuminate a limited area below land sur- Conserounding the projected vertical axis of the lamp. The area illuminated by the direct rays may be regulated or controlled by vary.- ing the diameter and length of the cylindrical member. This member, as shown in the drawing is suspended from the reflector by,

the reflector and maintaining it in proper proximity to and in relation with the lamp.

As shown in Fig. l the fixture is arranged to be suspended at any desired distance below the ceiling. In the construction shown in Fig. 3 the reflector is secured as by screws 17 to a bracket 18 which incloses a socket 19 of the lamp, the bracket having flanges 20 bent outwardly to receive the screws. This bracket has a threaded perforation 21 by means of which it is attached to an exteriorly threaded nipple 22 which projects downwardly from the ceiling, theiiipple being connected with a junction box or other suitable device (not shown). In this case, the periphery or outer portion of the reflector bears against the ceiling 23, the reflector' being perforated to receive the socket 19 of the lamp, the lower surface of the reflector engaging the collar Q4. of the socket. By this construction and arrangement the reflector engages the porcelain portion of the socket which insulates it to a large extent from the heat of the lamp.

The cylindrical member 9 is suspended from thereflector in the saine manner as in the construction shown in Fig. l.

In the constructionshown in Figs. 3 and 4, the socket is connected with the reflector by screws 25 passed through perfo-rations formed in thecollar 24 andregistering perforations formed in the reflector, the last sockets 7 land 19 lof the lamps are of theA usual heavy porcelain construction, whereby they are well adapted to insulate the reflector from the heat of the lamp, thus avoiding the crackingv of the enamel coating of` the reflector.

Having thus described my invention, what I claim is:l

l. A lighting fixture comprising a lamp,

a socket therefor, a reflector perforated to receive the socket, the lamp extending below` the reflector, a white enameled open ended metal member surrounding the lamp, and chains threaded through the-perforations in the reflector, the said chains having buttonsat their upper extremities toengage the up-l per surface of the reflector and hooks at their lower ends to engage openings with which themetal member is provided,

2i A lightingfixture comprising a reflector, alamp extending below the reflector and a. non-transparent member open at opposite ends suspended from the reflector, spaced therefromand surrounding the lamp,

the upper opening of'said member being as large as the lower opening.

3. A lighting fixture, comprising a reflec-A tor, a lamp extending belowfthe reflector, and anontransparent member open at opposite endssuspended from the reflector,

spaced therefrom, surrounding the lamp and-extending below the'l'uminous part of the lamp, the upper opening of said member beingfas large as the lower opening.

In testimony whereof I affixv my signature.

ALBERTV SECHRIST.

Copies of this patent maybe obtained for` ve cents each, byraddressingthe Commissioner VofPatentiil Washington,v ci

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