US1284019A - Lamp. - Google Patents

Description

W MyW/00D.

LAMP.

MPL10/num HLED APR. 19. me,

Ehrtcned Nm 5, 1918 2 SHEETS-SHEET l.

Fig Ef.

INVENTOR. WH W0 UD.

A TTORNEYS.

convergin? .nient t te wht source 1s located at the focal poin; 5 of the parabola in the. ver ical plane of the axis behind the focal point of the larger parabola in the horizontal plane of the axis and in tact behind all intermediate focal dpointe of the paraboles involved 1n the elliptical Jformation. I

By placing the two body pcrtions'in an guiar relations a triangular space. is produced at each aide of the axis .which is filled im. by let Sections 7, and in making the nper and lower body portions semi-elliptical in cross section and arranging them in angular relations and llin in the triangulaispace the complete boeg' appears to be aproximatel y round viewed from the front.- glie reflector described is designed to utilize an electric lamp in which the light einanates from a restricted arca approximating a point, but a somewhat similar beam and dit fusion of light may oe obtained by a reiector and lamp constructed and arranged as disclosed in Figs. 5 to t5. Thus, in Fiffs. 5 and 6, l show a parabolic reflector 8 ortho ordinary kind in which the focus is located approximately at point i). By employing an electric lamp having an extended line ol light and arranging' the lamp to place this extended line olf light at an angle and in intcrsectiug relations with the focus l the terminals l() and ll of the line oi light may be placed at equal distances in advance of and behind the focus .l and also at equal distant-,es above and helow the axis. rlfhe result in the vertical plane of the axis is this: that thc rays from the linear source ol" light are rn'ojerted trom the upper portion of the re eetor on lines approximately parallel with the axis, while the rays from the saine source are ln'ojected from the lower portion of the reflector at varying angles to the axis, that is, the light is dii fused. A source of light emanating from the axis ahead oil the focus cmiverges the rays and terminal 1l is laced in advance in this way in Fig. .5, but it must he noted also that it is `below the axis as well and in offset relation to focus l) therehy reetilyino, the convergence and causing the rays from this extended point to parallel the angle of deflect1on ofthe ray 0l light from focal point 9. The opposite tern'iinal l0 of the source of light is behind focal point 9 and ordinarily the rays of light would diverge under this condition, out this terminal point 10 is also ofl'set, only it is placed above the axis and relatively nearer the upper parabolic surface, thereby effecting the saine result as the front oilsct ll, that is, the ra y ot' light therefrom is projected at the saine or substantially the saine angle olf deflection as the ray from the focal point il, An entirely dillcrent result occurs in the lower portion oit the reflector, that is, the divcrginf; and convoi-gin rays of light due to the retired and adrancex points of light l0 and 1l are. not corrected but are enhanced because the rear point 10 is above the axis and farther removed from the lower parabolic. surface, and the front )oint 1l is nearer to said lower parabolic sur ace and beneath the axis. Briefly, a diffused light obtained from the lower half of the rcilector, and to utilize this distribution of light to the liest advantage, the saine steps may he taken as in the other form oiu my invention, that is, the lower por tion of the reflector may be arranged at un angle to the lippe' and an elliptical shape "ivcn to the reflector in Cross section.y sce "ias, 7 and 8. n addition, the electric lamp might he moved forward to place the iinc of light ahead of the focal pour.y ll so that prac tieally all the light will he directed hclow the horizontal axis the-lamp.

.Vhat l claim is:

l. in a lamp, a reilector of parai'iolicfornl having a plain sn'iooth reflecting surface ahove its horizontal axis and a multiple ot iiat light-diffusing surfaces beneath said axis.

Q. In a lamp, a reflector haring on one side olA its axis n paraholoid surface and on the other side oit its axis multiple o'i flat eoextensive reflecting` surfaces approximating a parabolic curve.

Il. l'n a lamp, a reflector having a plain smooth parabolic relief-.tira portion and a surface opposed thereto su -dividcd into a multiple ot co-extensive fiat reiectiin;r planes whose normals intersect the parabolic exis.

4. l'n a lainpkna reflector of parabolic form laavingY above its horizontal airis a plain smooth reflecting surface and below said axis a multiple of i'iat light diffusing' sur-- faces whose normals intersect said axis.

5. ln a lamp, a reflector haring at one side ol' .its axis a light focusing surface and at the other side a light dinusing and pro- ]ectmg surface.

6. ln a lamp, f ellector havin a parabolic reflecting portion on one side oi" its center and drawn ahorita given axis and a multiple of flat reflectingr surfaces of graduated size upon the other side of its center extending radially therefrom on parabolic lines, drawn about an axis slightly divcrgg ing from said first axis. i'

7. In a lamp, a rellector having a smooth parabolic reflecting surface and a reflecting surface Situated opposite thereto subdivided radially into a. multiple oi flat planes extending on straight lines which moet on parliiioeioio air of opposed semi-elliptic perolioloizie nving a plain smooth reflecting eurtece alcove its horizontal exis emol o mrlltiple ot fiat light. di'using surfaces beneath seid axis.

10. ln a, lamp, e reHeotor in the form oi a Jair of opposed Semi-elliptic poreboloirle 'arranged with "theiry greatest diameters im the horizontal plane through its ortis :incl the lower segment being eublivifiocl into Het li 'ht-diusing surfaces.

l1. n a lamp a reflector ol paroloolic form having e plein smooth reflecting' sur :tace above its horizontal axis :incl e portion v inclined relatively to seid axis liziviiig e multiple of Het light-diffusing surfaces belieetli said exis.

l2. lin e lamp, e, reflector wherein all eeetione' parallel to the exis contain. seroi-perou bolic segments having progressively verging focali points so related that every 'section transverse to the exis constitutes e portion of ali ellipse, :will a lineair light source obliquely olieposedto seid exis in tlie plone of the smallest parabole..

'13. lu o lomp o pair of reflector portiere oit elliptical emi parabolic tormetiori clit poeed with their etes in singolo-r relationL endl one ot Seidl portions hoving'e multiple of liet reflecting eurleoee.

semi,ellipt1e petrolio lll:

lfii e lmnpj rellector limiet; ii pero@ oloirl portieri, iti eoiiiliiioetioii iritli it lineair eoliree eirtciiolirlg through tlie sirio oi mieli portion to firllietoiitioll Y roiliorro olieterieee oil oppoeitesiriee tliereol erifl. irieliioeol relotirely to tlifit .atri-e. i

l5 lili heed light, ii. porel'iolio reilector io. `coroloiiiiitioio, with mi electric Aiiglit lila merit intersecting; the perebolie eirio end in oliiieel relatively thereto et oblique angle.

lll. llii e lieeolliglit, :i rei'leotor looting e poreloolio portieri erroiiigfetl with its exis horizontal iii oomliiii-etioio. with e linear light sottrae ii'itereeetiogi,P tlie poreliolic exis amil iiicliiiecl relatively tliereto, solei light eoorce loe/ingr wholly ooiitoiiiecl ilo. e Vertieel plone emi eine; iiicliiieii ilowiirrerrliy from roer to liront.

lit. ll'n e lomp, e. retlecl-or limiet; oppor sind lower rel-looting eorleoee oir' peroloolic vloi-m eet Willi their mies iii enigerlei* reletioiie, iii ooiiiloiiietioii with iiy lirie ofl light extending 'ltliroiirrli orio ortie moll inclined relati rely tliereton Y i lll. l'ii o, lioeol ligrlitE at rotleetor lier/img upper etici lower retleetiriii; 'eiirileeeeoll eemiperelooloicl torio eet with tlieir eroe dit/er img' torworclly iii eoiiiliiinotioii-Witli ai lineair light source intereeetiiig tlie :mis of the i1pper poritluoloirl orirl incliiierl relatively thereto, tlie direction oil elicli iocliiietioi be iii olowiermrrily .trom roer to iront.

llii testimony 'Wliereoii ll elitair my signature iii presence ot' two witiieeeeti lllllltillilllllllfll tll'llUll. liiitrieesee:

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