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Publication numberUS1225032 A
Publication typeGrant
Publication date8 May 1917
Filing date2 Jan 1915
Publication numberUS 1225032 A, US 1225032A, US-A-1225032, US1225032 A, US1225032A
InventorsPaul M Hotchkin
Original AssigneePaul M Hotchkin
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1225032 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



' iL atented May 8,1917.




Patented May 8, 1917.


UNITED s'r s P T-E: s1 OFFICE."

rum in. no'rcnxnv, or cnicaeo inlmors.


ToaZZ whom it may concern! Be it known that I, PAUL M. HoronKIN, a. citizen of the United States, residing at lGhicago, in the county of Cook and State of 'Illino1s, have invented certain new and useful Improvements onfReflectors; as set'forth in the annexed speeification.

My'invention relates to reflectors in gen- 7 eral, that is reflectors for various forms of ghting systems, such as for the indirect for'headlights of va- 'l umination of rooms, 'rious ty es, for desk or reading lamps and in fact or any place where it 1s desired to control the direction of the light waves radiating fro'ma suitable lightsource. The principal object of my invention is to con-l struct a reflector sothat'the light waves may be positively directed to certain areas and .c'onfined yvithin a desired space Another 20 object is to so arrange the reflecting surfaces of my device that the dazzling beam of light waves from a source of illumination such as an electric lamp of high candle power is broken up' and spread out so that they may be more equally distributed withinthe area Still another object of my invention is the provision of a reflecting body for automoe bile headlights that will direct and confine the light upon the roadway and thereby avoid the glare so prevalent in such structures, the existence of which is dangerous to pedestrians as well as to drivers of machines moving in the opposite direction toward said light. .The ordinances of numerous municicommonly known as glaring headlights and itis, therefore, an object of my invention quirements of these regulations by breaking up the beams of light waves andcontrolling the direction thereof.

' Other objects of my invention are the pro vision of a reflector that is both neat and attractive" in ap arance, eflicient in performing the articularfunctions for whichit is designedijand which is inexpensive to manufacture-so that it does not materially j add to the cost of manufacture;

The e and other objects I referto accomlish by the means and in t e manner heremafter fully described and as more particularly pointedout the claims, reference being had' to the accompanying drawings,

Specification of Letters Iatentf Application filed January 2, 1915. s nd L No. 4.

I on line 33, of Fig.1.

' palities now prohibit the use of whatare to provide a reflector which will meet the re- Patented May 8, 191 '7.

forming a pa rt ofthis specification, in which snnilar refe rence characters indicate the same parts throughout the various figures. Figure 1 is a vertical front elevation of one form of 1 my improved reflector.

.Fig. 2 is a top plan thereof.

Fig. 3 is a central vertical section taken Figs. 4 and 5 are views similar to Fig. 3 of a slightly modified form of reflector.

Fig. 6 is 2 planview of a reflector made in. accordanc e with my invention, the main reflector beit g truly spherical.

Fig, 7 is view similar to Fig. 3 of another modifi ad form of my reflector.

Fig. 8 illustrates one manner of forming or, shaping uhecorners of a'refiector body made in accc rdance with my invention.

Fig. 9 is a top plan of still another modified'form of ny invention in which the lower member is p: lrabolic..

Fig. 10 is a detailed view of my reflector illustrating i he mannerof using the same on anindir'ct rall fixture.

Referring more particularly to Figs. 1, 2 and 3 of the lrawings, it will be seen that my reflector com prises a shell, preferably formed of a single piece of suitable material. The 'lowermembar of thisshell preferably consists of a segment of-a hemisphere, the outer or for vard wall pf which is cut away and the rear portion 21 0f which curves upwardly in at. arc struck from a center-in advancei of thovertical plane of the 'front of said shell. The-top wall 22 ofthe shellc'0n. .stituting the base line of the-hemisphere is preferably disposed in a horizontal plane and the front 'or forward edge thereof is curvature of the back portion 21. 'At'the center of the rearportion of the top and forming a (ontinuation of the upper rear portionof t] Le segmentalmember 21 a dome shaped or h allow hemispherical housing 23 is formedi within which is arranged a l ght medium 24, preferably in the, form of, an in candes'cen't e ectric bulb. This hemispherical of housing 21 l thatthe direct lightwaves rostraight whi [e the rear edge conforms to the housing 23v a ndthe interior'of the se enta1' member 21 are preferably constructe so as to reflect th {light waves therefrom. The light elemen t 24'is so disposed in the dome ceeding the! efrom. will not be visible m directly in' irontof, the reflector as will be 26 and the segmental lower portion 28 curved downwardly. as well as. outwardlyin .the form of a compound curve as seen at 28-.

. The reflector just described, when viewed from the top (Fig. 6), will be seen to have the segmental lower member 27 thereof formedof a true semicircular outline or curvature. m

In Fig. '7 1 illustrate a reflector constructed substantially in the same manner as shown in Fig. 3 with the exception that the uppermember or housing 29, instead of be-' mg true hemispherical, is slightly parabolic in shape. This is for the purposeof condensing the light against the segmental member 30 and by shielding the direct light waves through the medium of the forwardly extending top 31.

As seen in Fig. 9, the reflector body 32- modified by constructing it may be further of. parabolic shape and by providing the top 33 that covers the same in a manner similar to that of the other structures; The upper member or housing 34 'may be of either a true hemispherical or parabolic shape, as


' in systems where a wall bracket 35 I,.have-il1ustrated in Fig. 8 a refinement of the reflector shown in Fig. 1 wherein the corners may be curved as shown at 32 instead of being made sharp or angular as in said Fig. 1, the remainin portion of the reflector being of any of t e shapes heretofore described.

, Whilemy invention is primarily designedfor a reflector for automobile headlights, the" structure is Well applicable to indirect light- 10 is used. ZI'eretofore the objection to; wall brackets i indirect li hting has been that a portion of the lig t (was thrown against the vertical wall and not entirely against the ceiling. With my reflector the outer edge; of the top .22 will prevent the -waves of light reflected from the lower or outer portion of the segmental member from striking the wall, and by'a proper adjustment the shadow cast by brought into alinement the line attbe meeting surfaces'of the wall and ceiling, this directing all of the light waves to the ceiling as-indicated in the drawing. I

From the foregoing description it is; evithe scope of concave reflector (Fig.

this edge may be with or parallel to dent that the combined action of the light housing and the body portion of the reflector will secure the. partial condensing or focusin its pro ection in the desired direction but also its even distribution throughout the area to be illuminated.

While I' have illustrated. and described certain specified forms of my invention, it of course, will be obvious, to others skilled in the art towhich it pertains, that various modifications and refinements thereof are possible without materially departing from the spirit of my invention. sire 1t understood that all such modifications and refinements are included within my invention as expressed in the claims.

What I claim as new is 1. A device for projecting light com rising a sector of a concave reflector provided with a supporting plate-and a supplemental supported on said plate, the axis of which latter reflector is at right angles to the axis of the first named reflector.

2. A device for projecting light comprising a plate closing said sector, and a sup= plemental reflector supported on said plate the axis of which latter reflector isat subof the light so as not only to secure I therefore deing a sector of a hemis herical reflector havstantially right angles to the axis of the I first named reflector.

3. A reflecting device comprisinga substantially concave reflector, a top plate or shield extending from the front to the rearthereof and provided with an opening, and

a concave reflector of relatively small dimensions mounted in said opening and adapted to reflect a portion of the light waves from a suitable light source through said opening upon said first mentioned. reflector and a source of light mounted in said smaller reflector.

4. Areflecting device comprising a substantially concave reflector, a top plate extending from the front to the rear thereof and provided withan opening, and a con-- cave reflector of relatively small dimensions mounted in said opening the axis ofwhich is at right angles to saidfirst mentioned concave reflector and adapted to reflect a ortion ofthe 1i ht waves from a suitable h ht source through said opening upon said rst mentioned reflector, and a source of light mounted in said smaller'reflector.

5. A device for projecting light comprise,

ing a sector of a concave reflector provided with a supporting plate and a supplemental concave reflector supported on said plate the axis of which latter reflector is at substan-- tially aright angle to the axis of the firstmentioned reflector.

6. reflecting device comprising a substantlally concave reflector, a plateextending from the front to the rearvthereof and provided with an opening, and a concave reflector of relatively small dimensions mounted in said 0 ening and adapted to reflect a portion 0 the light rays from a suitable light source through said opening upon said first-mentioned reflector, and a source of light within said device.

7; The combination with a reflector of 10 substantially concave curvature in crosssection, of a plate the curvature whereof reflector to be projected forwardly out of the latter.- a

' 8. The COIIlbl] lat-ion with a, reflector of concave curvatul e, of a plate having an edge the curvature (f which conforms to the 20 curvature of said reflector and being provided with an opening adjacent its rear edge, and a con :ave reflector on'said plate above said opening.

In testimony vhereof I have hereunto set 25 my hand, this 2)th day of December, 1914.

' PAUL M. HOTCHKIN. Witnesses:

E. K. LU: any, Jr., WM. I'IAR )LD EIOHELMAN.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4783725 *24 Aug 19878 Nov 1988RayovacFlashlight with space efficient reflector
US5130910 *4 Apr 199114 Jul 1992Tek Tron Enterprises, Inc.Reflective housing for increased luminance of fluorescent bulbs
US69691818 May 200129 Nov 2005Genlyte Thomas Group LlcFully recessed unit equipment luminaire
U.S. Classification362/349, 362/350
Cooperative ClassificationF21V7/04