US2259307A - Lighting unit - Google Patents

Description

Oct. 14, 1941. c. F. HERBOLD LIGHTING UNIT Filed Jan.

Q l I RN Y Patented Oct. 14, 1941 LIGHTING UNIT Carl F. Herbold, Lakewood, Ohio, assignor to Westinghouse Electric & Manufacturing Company, East Pittsburgh, Pa., a corporation of.

Pennsylvania Application January 12, 1939, Serial No.250,5 36

2 Claims.

I My invention relates in general to lighting unitsyand in particular to enclosed type street lighting units'which utilize sodium or other types of vapor discharge lamps as a source of light.

In order to effect a proper lighting of a street or highway, it is often desirable to use auxiliary reflectors, which extend downwardly within the globe of the lighting unit. Such reflectors are so placed as to direct most of the rays emitted from the light source into a relatively narrow beam vwhich is substantially parallel with the street 'or highway, and permit only a relatively ininor portion of the emitted light to be directed toward the house side, or at right angles to the street or highway.

It has been common practice to support such reflectors from the upper or hood portion of the unit, the reflecting surfaces extending into the enclosed globe and being placed adjacent to the light source.

The vapor type lamp being in most instances of substantially tubular shape and relatively long as compared to the length of Mazda lamps, requires a reflector which extends downwardly for substantially the entire length of the lamp or below the lower tip of the lamp in order to produce a proper distribution of all the emitted light. 1

Lighting units of the so-called open type, utilizing vapor lamps, such as the sodium lamp, have been used for some time for street or highway lighting. When it became desirable to adapt such sodium lamps to pendant typ units provided with enclosing globes, it was found that the relatively long reflectors which were necessary to use with the vapor lamps could no longer be supported from the upper hood in fixed relation to the lamp for the reason that these reflectors when made in such lengths as are required for proper light distribution would interfere with the opening and closing movements of the globe, and also interfere with the ready replacements of lamps or repairs to the internal portion of the unit.

The object of my invention, generally stated, is to provide a practical and novel arrangement for supporting such a reflector system whereby the enclosing globe may be easily opened and which will readily permit replacement of lamps.

A more specific object of my invention is to provide for supoprting such reflectors from the globe holder which supports the enclosing globe and which is pivotally supported from th hood to effect pivotal movement of the globe reflectors,

facilitating replacement of lamps and permitting easy access to the interior of the hood portion of the lighting unit when repairs are necessary.

These and other objects of my invention will become more apparent in the description to follow taken in conjunction with the accompanying drawing in which:

Figure 1 is a front view of a preferred embodiment of my invention, partly in elevation and partly in section; V

Fig. 2 is a view taken along the lin 11-11 of Fig. 1 being partly in section and partly in elevation; I

Fig; 3 is a View similar to Fig. 1 showing the globe moved toja partly opened position;

Fig. 4 is a plan view of the globe holder and reflectors taken along the line IV-IV of Fig. 1;

Fig. 5 is an enlarged sectional view taken along the lineV-QV of Fig. 4, and

Fig. 6 is a fragmentary view, in elevation, showing the manner in which the enclosing glob is supported on theglobe holder.

Referring to Fi re 1, which is a preferred form of a lighting unit embodying the principal features of my invention, a hood 8 is provided with an upper portion 9 including means for attaching the lighting unit to a bracket or any other suitable support, not shown, and a bowllike lower portion I0 which houses the fixture and socket assembly-for receiving the lamp.

To provide for pivotally supporting a globe holder l l, the lower portion l0 may be provided with a depending flange portion [2 on its lower edge which carries on its inner face a pivot support I3 and a latching member I4 which cooperate with complementary pivot and latch members I5 and I6, respectively, on the globe holder.

The light source comprises a vapor lamp I! which is of elongated tubular shape and may be provided with an outer enclosing flask l8 which is utilized to keep the lamp ll at a proper elevated temperature which is necessary for its operation. The lamp l1 and its associated fixture for connecting the lamp to the lighting circuit may be housed within the lower portion ID of the hood 8 in any well known manner, not shown.

The globe holder II, which is shown more in detail in Figs. 4, 5, and 6, is circular in shape and may be provided with a depending annular channel portion 2| on its bottom face for receiving the opening edge of any suitable enclosing globe 22. The globe 22 may be secured to the globe holder H by a split band member and globe ho to an p t o thereby 23 provided with a plurality of outwardly extending lugs 24 which are engaged by the screws 25 extending through the rim of the globe holder II as shown in Figure 5. A gasket 26 may be inserted in the depending channel 2| of the globe holder ll. Likewise a gasket 21 may be fastened in any suitable manner to the bottom face of lower portion ll] of hood 8'. These two gaskets are effective in making the lighting unit rain-proof.

The reflector system which I prefer to use comprises a pair of reflectors 28 and 29, each of which is provided with a pair of reflecting surfaces which terminate in substantially a line which is vertical and closely adjacent'to the flask [8, as shown in Figs. 2 and 4. As'hereinbefore explained, the reflectors 28 and 29 are made to extend below the lower tip of the light source I! to effect a proper light distribution and are provided with curved outer edges which follow generally the curvature of the enclosing globe 22'.

Referring now to Fig. 4, the reflectors 28- and 29 may be fastened to the inner periphery of globe holder II by means of a plurality of lugs 3i which may be riveted or otherwise secured to reflectors 28 and 29 and attached to the upper face of globe holder H by means ofa plurality of screws 33" which thread into suitable openings in the upper face of the globe holder. Y

Since the lamp l1 and its outer flask l8. pro-' ject well within the globe 22, it will be, evident that reflectors 28 and '29 must be so supported on the globe holder ll that they will not strike the flask I8 when the globe and reflectorsare moved to their open position I have attained such a result by mounting the reflectors on the globe holder at substantially right angles to the hinge member I and latching-member I6 of the globe holder. Referring-now toFig. 3, it will be apparent that when'the globe andglobe holder are pivotally moved to their open position, the reflectors-will move therewith in aplanewhich is substantially coincident with the plane of such pivotalmovement; It will be evident that with such-anarrangement the reflectors may be of anyv desired length as determined by the depth of the globe and will not'interfere in any way with the opening and closing of the globe.

supported from the globe holder may be utilized without departing from the spirit and scope of my invention.

In conclusion, it will be evident that I have provided a practical and novel type of support for reflectors which are utilized with lighting units of the enclosed type having an elongated light source.

I claim as my invention:

1. In an enclosed pendant type lighting unit,

. the combination of a hood, a globe ring, means for pivotally supporting said globe ring on said hood, a globe supported by said globe ring, an

a means, whereby said reflectors clear said lamp It will be understood that the form of reflecwhen said globe ring is pivotally moved to its open position.

2. In-an enclosed pendant type lighting unit; the combination of ahood, a globe ring, means for .pivotallyisupporting Psaid globe ring on said hood so that it may be swung to an open posi-' tion, a globe supported by said globe ring, an elongated tubular'qlamp extending within said globe, said globe ring being of such inside diameter as to clear the lower end of the lamp when the globe ring-' is swung to its open position, a pair of reflectors disposed in juxtaposition within said globe, each of said-reflectors being generally equal in length to the length of said tubular lamp, and comprising a pair of reflecting surfaces merging in substantially a line closely adjacent to and-on opposite sides of said lamp, and means for supporting said reflectors on said globe ring in such position that the plane defined by the vertical center lines of said reflectors is displaced at substantially right angles to the vertical plane defined by the pivotal supporting means for said globe ring, whereby the globe ring and globe may be swung to the open position without interference between the lamp andreflectors.

' 1 CARL F. HERBOLD.

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