US721648A - Adjustable means for mounting reflectors. - Google Patents

Description

PATENTBD PEAB. 24, 1903.

J. KINBY, JR. ADJUSTABLE MEANS POR MOUNTING REPLNCTORS.

APPLICATION FILED MAY 5 1902.

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IlvEnnI PATENTED FEB. 24, 1903. J. KINBY2 JR.' ADJUSTABLE MEANS FOR MOUNTING RBPLEGTONS.

APPLICATION FILED MAY 5. 1902.

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UNITED STATES PATENT OEEICE.

JOHN KIRBY, JR., OF DAYTON, OHIO, ASSIGNOR TO UNITED STATES HEAD- LIGHT COMPANY, OF BUFFALO, YORK, A CORPORATION OF NEW Yoan.

`ADJUSTABLE MEANS FOR MOUNTING REFLEC-TO'RS.

SPECIFICATION formingpart of Letters Patent No. 721,648, dated February 24, 193.

Application filed May 5, 1902l` Serial No. 106,'000. (No model.) l

To ULZZ whom t mag/concern,.-

Be it known that I, JOHN KIRBY, Jr., a citizen of the United Statesresiding in the city of Dayton, county of'Montgomery, and State of Ohio, have invented certain new and useful Improvements in Adjustable Means for Mounting Reflectors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled inl the art to which it appertains 1 to make and use the same,reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to the manner of mounting reiiectors in the cases of head lights, search-lights, &c., and it is more particularly adapted to constructions where the lamp is necessarily located at a fixed point horizontally of the case, and therefore not adjustable to the vertical focal line of .the re- Hector.

In headlights and other similar types of lights wherea reiiector is employed for the purpose of reflecting the rays of light ahead of the lamp the efficiency of the rcflectordeponds upon the location of its focal point relative to the burning-point of the lamp; and the object of my present invention is to provide improved means for mounting the reiiector whereby it can readily and accurately be adjusted soas to bring its focal point in proper relation with the center vertical line through the burning-point of the lamp. It consists in certain new and novel means for securing the reflector in position, the details of which will hereinafter be fully described, and pointed out in the claims at the end of this specification.

The invention is clearly illustrated in the accompanying drawings, forming a part hereof, and in which- Figure l represents in vertical section a headlight-case containing an electric-arc lamp and an ordinary parabolic reflector of the deep type; Fig. 2, a search-light case containing a similar lamp and an ordinary reiieotor of the shallow type, the case and refiector being shown in section; Fig. 3, a front view of Fig. 2, and Fig. 4 an enlarged detail sectional view of a portion of the reflector and its adjusting mechanism.

Similar letters of reference indicate correspending parts in all the figures of the drawings.

-A represents thecase.

B represents an electric-arc lamp which for the purpose of illustrating my invention I have selected and which may be of any suitable construction, in which the carbons are vertically adjustable.

C represents the reflector, provided with a flange ct and having' its focal point near its apex, openings h c being cut through its wall opposite its focal point for the passage of carbons B E, which are vertically movable in the usual manner. i y Y F is a reiiector of the shallow type, the focal point of which is in advance of its front ange a, as shown in Fig. 2.

The case is provided with a suitable number of lugs cl,

which maybe formed integral with the body of the case or otherwise secured thereto or supported andv into which are tapped screwthreaded studs e, each of which is provided with a reduced portion f, having a slot g to receive a screw-driver and an interior screwthread, which engages a nut h. The flange a of the reflector is perforated to engage the reduced portion f of the studs e, and it has bearing against a shoulder v1, formed on each of the said studs.

By the arrangement above described any variation in forming the ange a on the-reector, whereby the distance between the focal point of the reflector and the said fiange differs in different reiiectors, can be compensated for by setting the studs e forward or backward, as may be necessary tobring the vertical focal line of the reflector to its proper position relative tov a vertical line through the center of the carbons or other illuminating agency, thereby producing the best result obtainable, and when the reflector is thus adjusted it is held in such position by means of the nuts h.

In the foregoing I have described and have shown in the drawings What I now consider the best manner of carrying out my invention. It is obvious, however, that the details of construction may be modified Without departing from the spirit thereof, and therefore I do not Wish to limit my invention to such exact details.

Havingfhus fully described my invention, I claiml. The combination with a headlight-case having lugs secured thereto, of movable supports adapted to engage said lugs and to be moved horizontally therein, a reflector' hav ing an outwardly-extending flange perforated to receive said movable supports, and means for securing said reflector to said movable supports, whereby the vertical focal line of the refiector can be adjusted relative to the burning-point of the lamp.

2. The combination with a headlight-case, of lugs secured to the case, screw-threaded studs adapted to engage said lugs and each having a reduced screw-threaded portion at one end thereof, a reflector having an outwardly-extending flange perforated to engage said reduced portion of said studs, and nuts Which engage the screw-threads of said reduced portion and secure the reflector to said studs.

In testimony whereof I hereunto subscribe my name this 2d day of May, 1902.

JOHN KIRBY, JR.

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