US1786744A - Illuminating device - Google Patents

Description

Dc; 30, 1930. E. M. GAREY ILLUMINATING DEVICE Filed Feb. 8, 1927.

I N V EN TOR. EDWARD M awry M aw W A TTORNEYS.

Patented Dec.:q30, 193tl v I r i l g y Y PA ENT orrlca 1 nnwearm c n, QKLYN, we:

' v xnrvnmarm DEVICE Application 'filed marr -8, 192T; swarm. 1%;612,

- This invention relatesbroadlyto illuminatstantia lly diamond-shaped generally pyram! ing devices of the kind known to the trade as idal convexities are pressed inwardly from flood lights and spot lights, adapted to ilthe outer surface in predetermined formationlumina-testore windows, for instance, and The invention also seeks to providea reother prescribed areas bothindoors and out-: flec'torwhich may be manufactured inasub 55a doors, Theinvention also relates to reflec- 'stantially simple manner, and which will. i

' tors ior sueh devices. r serve as amore intense spotlight. To this end I One object of the invention is the, provision similarly shaped irregularities are formed of such an illuminating device which is inexin the surface in the reflector but these irreguin. pensive and simpleto manufacture and which larities are concavities instead-of convexities. 6Q hasanadjustabilitywhich is practically uni These and other objects of theinvention versal; Tothis end what may be termed the and the means for their attainment willbe neck of the fixture, within which an incandesmore apparent from the following detailed cent lamp is disposed is formed in one piece description'taken' in connection With them- 15. with the reflector andisadapted to receive, on companying drawings illustrating a pre-; 65 the: endopposite tothe reflector, a removferred embodiment of the invention, in

I able cap or cover inwhich the lamp socket is which: 7 i I concealed. The neck has facilities for venti- I Figure l is a view in side elevation and lating the interior thereofand oi the reflector, partly in section showing an illuminating de- M and itcarriesan can by which it is clamped to vice according to this invention. 70

a pedestal with provision fonadjustment of I Figurei is a view in front elevation of the the reflector axis at any angle in afvertical illuminating device.

plane. I Figure 3 is a fragmentary sectional view The invention also seeks to secure a closure taken in the plane indicated by the line 3-3 of a transparent charaoter'to the reflector in in Figure 2 and looking in the direction of 75 30 lattermay be stretched and clamped in place ties instead of convexitiesr I 7 a simple and expeditious manner. To this the arrows.

endthere may be placed over the rim of the Figure 4; is a fragmentary portion of the re reflector a sheet of transparent material either flector when used as a spot light showing the of glass or of a gelatinous substance which surface provided with a'plura'lity of concavi- 80. by a-flexible ring capable of being snapped Figure 5 is a view on an enlarged scale on overa flange on the rim of the reflector and showing a fragmentary portion of the support retainedthereon by suitable lugs. for the illuminating device. 7

The invention also has for-its object the Referring to the drawings the socket 10 for provision of a reflector whereof thereflecting the in'candescent'lamp 15,1is shown as con- 85, surface willbreak up or deflect the light rays tained within a socket cover 11 to and through so as to causethe light radiated therefrom to the end'of which the electrical conductor 12 serve as what is knownas a flood light over is: led. The socket cover 11, is adapted to a wide area whileat thesame time aflording telescope without or slide over a reduced end a concentrated ray at the center ofintense 'orfian'ge 20 on-the main barrel'portion or so illumination, ice. a sort ofcombined spot and neck 13,-the annular'head 14 on the socket, flood light. Accordingly, the reflector is cover 11 abutting against and limiting the formed of a thin stampable easily polished degree of insertion of the fla-nge 20. Suit metal and a plurality of substantially prisable boltsfi pass throughthe end wall? on maticirregularities are formed thereon soas the neck 13 and position the socket 10 and to; break up a predetermined portion Lot the secure the socket coverllin place. I

light rays toobtain theefiect of aflood light The 'neck 13" is flared loutwardly to form while concentrating another portion of the an enlarged portion 16-for the reception the light to'intensifythe center of the illuminated filament portionlof the incandescent lamp and 5 9 area, M g articularly a plurality of sub is provided with a, pluralityof aperturesor a l of adjustments about the axis in avertical" plane.

Post 23 is axially rotatable within a'base 24 adapted to be secured in stationary position, as by screws, to the supporting surface, to which base the post 23 may be clamped in desired angular position by means of theclamp screw 26.

Integral with the receiving part 16 there is formed the parabolic reflector 18 which is preferably formed of thin stampable highly polished metal with an outwardly turned flange 27 disposed in a plane perpendicular to the axis of the reflector. The transparent closure 29 is held against this flange by an annulus, indicated generally at 31, and comprising a front flange 32 and a rearwardly extending flange. 33 substantially atright angles to the flange 32 and formed with a plurality of lugs 34 pressed inwardly and adapted to be disposed behind the flange 27 on the reflector 18 to hold the annulus 31 on the reflector. This annulus 31 is formed of flexible material having a degree of elasticity, such as zinc, so that it may be readily snapped over the flange 27 and held in place by the inwardly pressed lugs 34.

The construction just described permits not only the retention of a sheet say of glass as a closure 39 for the mouth of the reflector 18 but a flexible sheet formed say of a gelatinousmaterial, suitably colored, may also be retained as indicated in Figure 3, it being merely necessary to lay the sheet 29 over the mouth of the reflector 18 and snap on the annulus 31 thereover, the annulus serving to stretch the sheet of material and clamp the edges 36 thereof about the flange 27 as shown.

When used as a flood light the surfaceof the reflector 18 is broken up by a plurality of convexities which are formed by pressing inwardly spaced portions of the surfaces, as at 37. These convexities are formed in annular rows in quincunx formation and the size of the individual convexities decrease toward the narrow part of the reflector. The convexities are also disposed in radial'rows as shown and are substantially diamond shaped in outline so as to form, in effect, pyramidal convexities having a diamond shaped base with a slightly longer axis of the diamond extending in a radial direction but with all edges of the individual pyramids rounded as shown at 39 and having the apex blunt or vrounded or substantially curvalinear or spherical so that the light rays from the incandescent lamp striking these irregular surfaces are diverted in different angles and mingle to form a light which is diffused over a wide area and suitable as a flood light.

The surface of the reflector thus broken up i is particularly eflicacious since it permits of theretention of a high polish on the interior of the surface so that no light is lost in the process of reflection while the greater part of I the light-rays are broken up and mixed by what may be termed a prismatic diflfusion and the light is thrown from the reflector over a 7 large area withverygood intensity proximate the reflector without glare. At the same time due tothe spacing and shape of the irregularities this reflector also projects a central beam of greatly increased intensity, that is, of an intensity greater than would result were the prismatic surfaces not present,

The same general configuration maybe availed of to increase the intensity of the light and permit the use of this fixture as a spot light. I have discovered that I am equally able to press these diamond shaped substantially pyramidal figures outwardly from the interior surface of the reflector to form a plurality of prismatic depressions so that each irregularity is in effect turned inside out, and thus a strong. light over a prescribed area may be focused while all objectionable glare is obviated.

It may thus be seen that a, reflector hasv been provided which may be readily and economically manufactured and which will diffuse the light or concentrate it depending upon the use of concavities or convexities.

What I claim is:

1. An illuminating device comprising a reflector having an inner polished surface formed with a plurality of protuberances forming substantially pyramidal reflecting surfaces arranged in quincunx formation.

2. An illuminating device comprising a reflector having an inner polished surface formed with a plurality of protuberances forming spaced pyramidal reflecting surfaces formed with rounded edges arranged in radial rows. 3. An illuminating device comprising a sheet metal reflector having an inner polished surface formed with-a pluralityof inwardly pressed diamond shaped convexities arranged in'quincunxformation. .4. An illuminating device comprising a re,- flector, a neck integral therewith and formed with an end of reduced diameter, said reduced portion co-acting with a socket cover which telescopes over said reduced portion, a socket disposed. within the socket cover, a flange in the said reduced portion co-acting with the said socket by bolt means to secure the socket cover and socket in position. 7

y In testimony whereof I aflix my signature.

EDWARD M. GAREY.

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