US979852A - Reflector for headlights. - Google Patents

Description

A. R. HARBISGN. BEFLEGTOR FOR HBADLIGHTS.

APPLICATION FILED 00T. 3, 1910.

Patented Dec. 27, 1910.

2 SHEETBv-BHEET l.

, A. R. HARRISON.

RBPLEGTOR FOB HBADLIGHTS. APPLICATION FILED 00123, 1910. 979,352, Y vlamented 1180.27, 1910 2 SHEETS-SHEET 2A animan straits ran cerro.

ALEXANDER R. HARRISON, OF MILLVILLE, NE'W JERSEY.

REFLECTOR FOR HEADLIGHTS,

Application filed October 3, 1910. Serial No. 584,976.

h all whom it may concern:

Be it known that I, ALEXANDER R. HenmsoN, a citizen of the Unit-ed States, residing at Millville, in the county of Cumberland and State of New Jersey, have invented certain new` and useful Improvements in llefiectors for Headlights, of which the following is a specification.

My invention relates to improvements in reflectors for head lights', the object of the invention being to provide a reflector particularly designed for use in locomotive head lights, which enables the employment of a mirror as a reflector inclosed within a protecting casing of metal, and which permits of independent' expansion and contraction of the glass and the metal in all directions to prevent the breaking of the glass.

A further object is to provide a reflector of this character' in which the mercury coating on the outer face of the glass reflector is protected at all times regardless of the expansion and contraction of the parts.

lVith these and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts, as will lhe more fully hereinafter described and pointed out in the claims.

In the accompanying drawings: Figure l, is a View in longitudinal section illustrating my improvements. Fig. 2, is a view in cross section taken through the chimney openings 1l and .12, as well as through the openings 13. Fig. 3, is a View in side elevation, and Fig. el, is a rear end View.

ln constructing my improved reflector, I employ a glass mirror l of general semiellipsoi dal shape such as in common use, and coat the outer face of said glass with 'mcrcury 2 or other suitable material to form a mirror. This glass .l is inclosed in a metal casing con'il'nrising a plurality of quarter scclions 3 which, when together, fit snugly the glass l, and project at their forward edges beyond the forward edge of the glass.

By particular' reference to l"ig. 2, it will be noted that the longitudinal edges of the sections 3 are beveled as shown at et, so that the sections overlap maintaining a covering for the glass regardless of the difference in expansion and con-traction between the parts. Logs 5 are provided on the sections 3 adjacent their meeting edges, and these lugs are connected by coiled springs 6 exerting a con-I stent pressure on the metal to hold it on the glass, yet permitting the free expansion and contraction. At the extreme rear end of themetal covering, the opening' 7 formed by thel several sections whichis necessary to allow the sections to move relative to cach other, is.

. breaking the glass, While the springs 6 permit of independent or different radial expansion of the' glass and metal without anydanger of breaking the former.

Glass l is'provided at top and bottom with openings l1 which register with openings l2 in the metal casing, and are adapted to receive the ordinary lamp chimney of a locomotive head light. y

At thesides, the sections 3 of the metal casing are provided with openings 13, and the glassl where it registers with the open ings 13 is left free of any outer coating 2, so that the light from the lamp at these points shines directly througli the glass so as to illuminate thc numbers on the sides of an ordinary locomotive head light.

My improved reflector is designed for use to take the place 0f the ordinary metal reflectors, will overcome the defects of metal reflectors, and will more powerfully reflect the light than reflectors in general use.

Various slight changes might be made in the general form and arrangement of parts described without departing from my invention, and hence l do not limit myself to the precise details sct forth, but consider myself at liberty to malte such changes and altera.- tions fairly fall within the spirit and scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A reflector comprisinga glass mirror of general semi-ellipsoidal shape, a sectional metal casing inclosing said glass mirror, and elastic means holding said sections t0- gether, substantially as described.

Q. A reflector comprising a glass of gen llt) mentioned 'openings in the casing, substanj t'ially as described. l y

'8. A reiiector comprising a Aglass mirror `of general semi-ellipsoidal shape, a metal casing (over said mirror comprising a plural-` ity of overlapping sect-ions, lugs on said' sections, and springs connecting the lugs of #one section With the ings of the other, substantially as described.

4. A reiector comprising a glass mirror oi" general semi-'ellipsoidal shape, a metal Casin over said mirror comprising e plurallty o overlapping sections, lugs on said sections, springs connecting the lugs of one 4section with the ings of the otherD the for- Ward edges of said casing sectionsv extending beyondthe forward edge of the mirror, `and inwardly projecting spring tongues on said sectionsengaging the inner face of the Inir- A ro'r, substantially as described.

In testimony Whereofl have signed my name to this specification in4 the presence of two subscribing Witnesses.

ALEXANDER R. HARRISON, Witnesses (1E.- Porre, R. KRENKEL.

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