US1180748A - Lamp. - Google Patents

Description

H. A. WILLIAMSON.

LAMP.

APPLlA'TloN FxLED 1AN.28. 1914. Rem-:wan MAR. 18,1916.

' 1,1 WM... Patented Apr. 25,1916.

HENRY A.. WILLIAMSON, 0F GHCAGO. XLLNOIS.

LAMP.

Meritis. y

Specification .of Letters Patent.

Patented Apr. 25, Nitti?.

Application filed January 2S, 19141 Serial Nov 8144MB. Renewedv March 18, 1916. Serial No. $55,199.i

here invented n cel'tnin new und useful Im provenient in Lamps. nud dechire the .follon'ingto loe n full. clear`l n-nd exact description ot' the sinne. such :is will cnnhle others skilled iu the mit to which it pertains to mirko und use the sinne, re terence heiner had to the ncconlpnnyiner drawings, which forni n pnrt of this specification.

My invention hns for its object to produce a, lmnp by inenns of which the direction of the rays ot light muy hc determined nt will the eyes even though n powerful light be used.

The various tentures ot' novelty whereby my invention 'is clmrncterized n'ill hereinnt ter he pointed out with pin'ticulnrity in the claims; hut for n `l'ull unilerstnnding ol my invention und olf its object und :ulrnntnges, reference. may he hud to the following' detniled description tuken in connection with they accompanying drawing. -ohci-ein:

Figure .l is n centrnl longitudinnl section through nn nu 'tmobile lump embodying my im'entiion; Fig. 2 n tront i'ien ot the lmnp; sind Fig. S is u section token on line 3H?, of Fig. l.

Generally spenkine, my intention conin the use of n plurnlity ol lens sections or segments 'provided with prismutic rihs, und n similar ninnlier of reflectors zich ndnpted to reflect :i pretlelermined portion of light troni the source. through oncol the lens sections or segn'ients.

vln-the drawings ,l hure illustrnted my invention in its simplest torni und, For the stilte ot brevity. l shnll confine the detailed description to this one torni.

Referring` to the drawing'. 'l representsV :t lensing open :it the 'front nud hnring in the roer end thereof :it suitnnle lmnp or other source ot' illni-nimition. 'lhe Front olI the casing' is closed by menne uit n lens nnide of :i plurality ot sectiws. in 'the' present nru rangement the leus is innde ot' eight sections each having nn unfgular width or' 'forty-tive degrees so that when placed together they form a, complete disk. The sections are indicated. by the reference character 3. Esch .Section is provided with prisnnitie ribs,

extending transversely to rthe rndinl axis; the arrangement being such that when. the

several sections Ynre assembled together the ribs thereon torni :i series oit concentric ooi' tngons extending' from the center to the pcriphervy reniently he held together by plncing them between tivo disks of plain glass, 5 and 6.

Behind the lamp is arranged :i reector, 7, in the torni ol e truncated pyramid having ns many sides ns there are lens sections and so disposed that. each side lies-directly he# hind one of the lens sections. With this :irrnnsjeinent, each lens section receives light from :L tint; retlec or portion., so' that the light. is unil1 ormly di. rihuted und, in passing through the lens, is positively directed, sind there being; nl; the same time suftieient diffusion to prevent an objectionable glare and prevent the-light from being dazzling no mutter from what point it is viewedrnnd eren. thonghthe source ot light be a poivrerful one. i

While l have illustrated and described with pnrtieulnrity only n single preferred :form of my intention, l. do not desire to be limited to the exact structural details thus illustrated und described, ont intend to cover sill forms and arrangements which come within the terms employed in the definitions ot my invention constituting the appended clnims.

.l v claim:

l. ln n lamp, n flens composed of e plurality ot segments each provided with prisf mntie ribs arranged transverse to the redini. axis thereof, n reflector mode of segments corresponding; nnniher to the number of lens segments and ench segment of" the reflector being.;1 disposed directly hehind one O the lens'sefnuents, und u lioht dis osecl loein n lamp, n. plurality of lens members provided with 'prisrnatie ribs, e reflector having e plurality of sections corresponding in number to the lens members nndjettch zu ranged directly behind one of the lens mem- The several sections may C0n' bers, and a source of light disposed between `the'relleotor and the lens members.

' In a lamp, a lens composed of n plurality .of segments arranged edge to edge vbeing provided. with prismntie ribs extendlng transversely to its radial axis, plain glass disks lying on opposite sides of the lens segments for holding the seglnents together, :i reflector in the forni of :i truncated py1'n1nid\\`.ose sides are equal in number to the number of lens segments,` each side of the reflector lying directly behind'one of the` lens segments, und a. source ol l1gl1t between the refiector and the lens.

In testimonyA whereof, I sign this specifi- Galion in the presence of two witnesses.

HENRY A. WILLIAMSON. lVitnesses WVM. F. FRnUDnNnnrCi-r, RUTH E. ZETTERVALL.

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