US986668A - Reflector for automobiles-lamps. - Google Patents

Description

P.. G. AVERY.

REFLEGTOB F03 AUTOMOBILE LAMPS. 1APPLICATION FILED APB.. 29, 1910.

Patented Mar.141911.;

Z y 2 HEEETBHBET 1.

I "IH" mun P.A CL AVERY.

BBPLEGTOB. POR AUTOMOBILE LAMPS.v

APPLIOATION FILED APB.29, 1910.

986,666, n APatented1\aa1.14,1911.

, v 2 SHEETS-SHEET 2. @d N mately the desired parabolic shape. and then plated with silver or nickel` UNITED sTATEs PATENT oEEio-E.

PERCY C. AVERY, OF MILWAUKEE, WISCDNSIN.

REFLECTGR FOR AUTOMOBILE-LAMPS.

Specification of Letters Patent. Patented B131'. 14, 191.1.

Application filed April 29, 1910. Serial No. 558,411.

To all 'whom It may concern:

Be it known that` I, PERGY C. AVERY, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, hare invented certain new and useful Improvements in Reflectors for Automobile-Lamps, o which the following is a specification.

My invention relates in general to lamps, and more flector.

The reflectors in common use for project-l ing the light some distance', as, for instance, for automobile lamps, are made of sheet metal, usually copper, stamped to approxibolic surface cannot, however, be imparted to stamped sheet metal, as the thin metal is injured by the heat, is easily bent and dented, and Will-not retain the desired shape. The result of these objections ,is that the reflectors now in use do not project the light in a thoroughly eliicient manner.

The primary object of my invention is to provide a Areflector for lamps, such, for instance, as those commonly used on automobiles, which cannot be bent' or dented, Which may have imparted thereto a true parabolic surface, which 'will rtain suchV surface in usageLand which will be non-corrosive, being durable and efficient in usage.

l My invention will be more fully described hereinafter with reference to the accompanying drawings, in which the same is practical form', and in Whichillust-rated as embodied in a convenient and'v Fiurc l is arear elevationalview' Fic.- l' h n I ,u h

2, a` horizontal section on line 2, 2 of Fig. l;

Fig. 3, a horizontal section through the reflector, showing the same in position upon a lathe; and Fig. 4, a view similar to Fig. 3, showing the polishing tool in position.

Similar ,reference characters are used to designate similar V ures of the drawings.

Reference letter A indicates my improved reflector, suoli, for instance, as aluminum, capable of having imparted thereto a polished reflecting surface. The reflector is made of a 4sulllcient thickness to avoid danger of'injury by 'beingbent or dented. Lu s A and A2 are cast integrally with the re ector and are4 provided with vertical holes theren particularlyrto an improved reparts in the several fig- Which is iliade of a cast inetah.

collar B serves to support the reflector `Whilev it is being ground and polished, as will be hereinafter described, and also serves as a chamber to inclose the electrical connections of the bracket within the lugs leading to an incandescent light, such as C.

Ascrewthreaded opening b extends through the reflect-or coneentrically with respect` to the circular flange B. An exteriorly screw threaded plug c adjustably extends through the opening ZJ and is provided with a socket Within which is received an incandescent lamp C. A lock nut c surrounds the plug c to retain the same in any desired adjusted position. is closed bya circular cover j B having thereon binding posts b and b2 With which are connected the leads of the battery circuit.

D indicates the glass front of the lamp which is secured to the outer circular edge of the reflector in any suitable manner, as `by means of a. flanged band d.

j VIn the manufacture of my improved reflector, the metal is 'first cast intothe for-ni desired for the reflector, the mold being such as to impart a parabolic curve tothe inner surface lof the reflector. The reflector is then supported by means of the circular flange- Bin the lathe so that its inner surface may be ground to a true parabolic surface and subsequently polished.

In Figs. 3 and 4 I have illustrated, at E, a lathe chuck of any suitable form, which is provided with radially adjustable jaws E', which 'tightly surround the flange B of the reflector. A flat tool F, having a curved edge conforming to the surface at the center of the reflector, is supported upon a toolpost G on a table Gr of a lathe of any ordinary construction. The tool F is preferably provided With a. reduced end f which eX- tends through the opening b in the reflector, and thereby centers the tool While the reflector is rotated around the same by means of the lathe chuck. After the tool F has truedV thesurface at the center ofthe r'e- Hector, a polishing tool H is supported upon ics the toolost of the lathe. The polishing tool is o. a Shape conforming to the parubolic surface of the reflector, and is referably made of wood having emery glue thereon. The tool H is supported upon n shaft it which is journaled in a bracket K mounted upon the tool-post of the lathe. Any Suitable menne may be provided for rotating the 'tool H, such, for instance, as a. belt pulley H fixed upon the shaft h. The surface of the reflector is finally bufled to impart there to the desired olish, in order that it may be en efficient llglit reflector.

From the foregoing it will he observed that I have invented an improved reflector which avoids the objections to the stamped sheet metal reflectors in common use, inasmuch as it is free from any dan er of being bent or dented, and is capable o having i1nparted thereto a true parabolic surface, und which will retain such surface.

I claim:

l. A cnet n'lctnl reflector for hn'nps having :i circular flange conccntricnlly cust on the outer surface thereof, and having" :in integral polished reflecting surface.

E2. A cast mctnl reflector for lumps having nttaching lugs enst integral therewith, said reflector having e. circuler flange concentrically cnet on the rear outer Surface thcrcof and having :in integral polished reflectingr surface In testimony whereof I have subscribed my name.

PERCY C. AVERY. VVitn essee CHAS. L. BURNHAM,

A.. M. STnTreN.

Images