US1208387A - Electric lamp. - Google Patents

Description

ELECTRIC LAMP.'

APPLICATION min Auml. 191s.

miente@ i2, MMS.

willy m n w m w w m m ELECTRIC LAMP.

Specieation of Letters Patent.

il tinuetion application Serial No. 116,022, filed .Tuly 19, i916., This application filed August 11., l.

Serial No. H4537?.

To all ffl/fiom t may concern.'

ln.' it lnoivn that l.y ilrrnno Scriioiinumxo, a en of the United States, and a resident unt Vernon, in the county of Westr and Stato of New York, have inrentcfl certain new and useful improveH ments in Electric Lamps, ot which the following; is a. specification.

r Y' novoin nts are appli able to elcorie lamps generally, und tor various purposes, although designed more particularly in connection with the so-called i lots oil au (nnol'iiles7 ete.7 the object .o provide niezn'is whereby the larger l' of liglit rays projected. from the (I bullo are concentrated and de- 'o and by the usuel parabolic re- Y in suoli manner es to be directed nn'ord onto-the road bed in advance of he veliicle, While the light disclosed directly ly .the upper portion the lainp, considered :i uhiile is din'nued and subordinated, and preferably tinted to render it unobjec- 'r'.ionablo and liai.inloss,--tlio concentrated rays ot -white lioglit only being* Iirojected :ilong the surface oit 'the rood. ldy 'this means the dangerous and coiilusingglare ot the head light obviated without derother bv augmenting, the deiniination, and night traflic more salie :ind agreeable. it 'n that heretofore many accin wimillcd from they blinding briln orc-oncd or nmlin'nned head ,l especia y ivhere tral'lie is congested.

"fg invention consists primarily in the iso. conjunction with the electric light mlb and the ordinary parabolic reflector' or the i 'nlcnt thereof of an inverted lighttrfuisnntting hood piece of seini*transparent or trzuislucent nnaterinl, preferably of ainber color, Which modifies, tints. blends und dil ilf'usesthe light revealed by the upper portion oit the lamp, considered as e Whole, While hiding; and. completely concealing the eloctric bulb from sight when the. lamp is viewed directly from the front,the hood being open only at top to allo7 the rays from the incandescent lihn to iinpinge directly against theupper portion oit the reflector so as to project a benin of White light downward in the ground in advance of the line vel, While the light visible above this lower 'white benin ont road lightwill betransunited end rendered barrel agreeable although suflicieut in intensity to answer .fill required purposes other than the direct illumination of the road bed, it being understood in this connection that iny inverted, light transmuting hood is independent of the electric bulb, Yforming' no part thereof, but rendering it invisible except possibly as viewed at an acute angle at close range looking down through the upper part ol the lanip and through the open top portion of said hood; and :furthermore that the hood, in Connection with its mount, entirely screens the lower portion of the main or parabolic reflector troni the light einanatii'igij troni said electric light bulb except that passing; tlirough the .senil-tronspnronl or translucent initerial ot' Which niy light tronsrnutingn hood is composed.

il secondary feature of niy invention conin Vthe combination and use in conjunction with in v inverted open top light-transhintinghood of un inner supplementary re- .flector cup interposed between said hood and the light bulb, Which suppleinentol. reflector concentrates and deflects most of the light'rays emanating troni the bottoni of the iucaiulcscent electric light bulb onto the upper portion of the surface of the inain or parabolic reflector to be deflected and projected thereby from the lower front portion ot the lan'ip together with the light rays received by said upper portion of the nniin reflector directly ifroxn the upper side of iid electric light bulb.y thus further modifying the light imparted to my light-transinuting hood while intensityingv the boan'i .of White rond light projected douiiivard from the upper ortion of snid moin reflector'.

lnoiclbntnlly my invention also includes certain minor features in the construction :ind arrangement of parts whereby my sup.- plon'icntary deflector cup and diiilisinp; hood :ire ndaptcd to linups of forms und constructions heretofore known and used, all as here inafter more fully set forth.

in the accompanying drawings, Figure l, is a front view of, say, an automobile .lamp designed to loe used as a head light, and einbodying the essential features ofrmy invention; Fig. 2, is a central vertical sectional elevation of the saine upon a. larger scalo showing the invention es adapted to lmnp reflector havingI ahorizontnl socket for the electric light bulb., the front glass bein g ornitted; lig. 3, is a liront View, full sir/.e2 o-l the manner,

supplementary reflector cup and bracket shown in Figs. l, and 2; Fig. 4, is a rear View of the same; Fig. 5, is aview of the under side of the bracket member lshcgwn in Figs. 3, and t; Fig. 6, is a side elevation of the electric light bulb socket and supplementary the like, A, representing the customary con.- cave mirror 0r reflector, usually of parabolic form, asv related to the electric light bulb 7),-

.said electric light bulb o, being positioned at the focus of the parabola or substantially so.

The electric lamp b, is seated in the usual socket tube s, supported in the inlet sleeve a', of the reflector A, and rigidly secured in position thereon' by a set screw e2, and nut 0.3, or equivalent mechanical expedient, said socket tube s, being formed with the bayonet slots s", s2, for the reception respectively of radial studs b2, on the bulb plug b, and studs' o, on the circuit plug c, to which the electric conductors are attached in the usual s3, representing the usual socket part oin which the yieldable contacts are mounted.

Secured to the inner end of the socket tube s, is a bracket member (i, although it might be affixed rigidly to the back of the reflector or other stationary part if preferred. As shown in the drawings the bracket member d, is formed with a split clamping ring d',

adapted to encircle said inner end of thesocket tube s, and having its opposed ends connected bya sets/crew d2, as shown more particularly in Figs. 3, 4, and 5.

Attached rigidly to the main part of the bracket member d, is what l designate Yfor convenience as the supplementary reflector cup 1*, adapted to cover the rear and lower portion of the electric light bulb b, and to deflect the light rays received therefrom upward onto the upper `forwardly inclined or parabolic surface (l, of the main rellector A, to supplementthe light rays impinging thereon directly from the upper side of said electric light bulb and unite therewith to form an intensified beam of ground or road light which is projected downward and 'lor- Ward to and from the lower portion ci the lamp, or in other words deliected downi 1ard at' an angle from and by the upper portion a, of the main reflector A. It will thus be understood that practically the 'Full illuminative value ot the incandescent film in the electric light bulb t, is concentrated in the beam of road lightprojected from the lower pensee? portion of the lamp or head light, so that it will most ei'ectua-lly reveal the line of ad- ,vance without dazzling the eyes of those facing the headlight.

rlhe supplementary reflector cup r, being opaque of course cuts oli' a large percentage of light from the lower portion of the main refiector A, so that the light reflected upward 'from said lower portion of the main rellector will be slight and subdued as comparedv with the intensified beam of road light projected downward from and by the upper portion a, of the main refieetor, as above set forth. To still further subdue and render unobjectionable the light projected from the upper part of the main reflector and lamp, and at the same time render it agreeable and harmless to eyesight, l propose to use in conjunction with thc electric light bulb b, and reflector' A, either with or without the supplementary reflector cup i,

a dimming or diilusing glow-shade l1., made of semi-transparent 0r translucent material, open at top for the passage of rays of light direct from the electric light bul b, to the upper surface a, of the main reflector A, but closed at front, bottom and sides. This hood 7L, for blending and rendering innocuous the light visible as emanating from the upper portion. of the lamp is preferably of an amber tint so as to absorb the ultra violet rays, but other colors may be used to neutalize certain rays, as preferred,--tlie object being primarily to attain, as it were,` a bifocal etl'ect in that the light trmismitted visually by the upper portion of theI lamp will be glow soft and non-actiuic as compared with the intensified beam oi white road light projected from the lower part ot' the lamp.

The front and side walls oi my inverted light-transmuting hood or shade 7i.; are ol suilicient height to conceal the electric light bulb from direct iront View. as will bo nnderstood by reference more particularly to Figs. l, and Q. Even when said l'ront and side walls are as low as shown in llig. 2.,-- f. o., with their open edges in alinonlcnt with 'the top of the bulb ).-it will be soon that the latter could only be seen when in close proximity to the lamp, and then only by looking down through the extreme upper portion a, ot' the lamp, so (hat to all intents and purposes theI incalulescont light L, is practically concealed and isolated view, frontally considered, and hence no direct rays therefrom can possibly dazzle or annoy the oyes of observers under ordinary l conditionawthc upper part (z. ot the main

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