US1571139A

US1571139A - Refractor

Info

Publication number: US1571139A
Application number: US677971A
Authority: US
Inventors: James G Nolen
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-12-01
Filing date: 1923-12-01
Publication date: 1926-01-26
Anticipated expiration: 1943-01-26

Description

Jan, 26 1926. 3,5%39

.L/G.- NOLEN REFRACTOR Filed Dec. 1, 1923 Patented Jan. 26, 19.26.

:mns e. NoLEN, or NEW Yonx, 11x.

PATl-:N'ro

FFICE.

REFRACTOR.

Application lecl December 1, 19253. Serial No. 677,971.

To all whom it may concern.' t

Be it known that I, JAlms G. NOLEN, citizen of the United States, and resident of New York in the county of New York and State of ew York, have invented certain new anduseful Improvements in Refractors, of which the following is a s eciiication.

This invention pertains to hght refracting means essentiallydesigned for headlights, or lamps such as used on motor vehicles and similar places. .The object of the invention is to provide an improved arrangement whereby the rays from the lamps are projected forward in a narrow cone at the center or in the axis of the light, while all of the surrounding light rays are broken up or diffused.

A vfurther object of the invention is to provide a light controllin member of this character that can be readily applied to existing forms of lamps, especially where a parabolic reflector is employed.

In the accompanying drawing showing one embodiment of my invention, Figure 1 is a' vertical section of the device.

lFig. 2 is a fragmentary section taken on the line A-B, i-ndicatedin Fig. 1.

The invention as set forth comprises essentially a shell of substantially conical form, with the walls practically concavoconvex as shown. This shell at its larger open end is bent outwardly to form an an- 'nular ange, by which the member is conveniently mounted on the front of a lamp, especially one having a parabolic form.

As set forth, theA lamp comprises an outer shell 3 of somewhat conical form, that carries a lamp 4;, such as asmall incandescent lamp; in the shell is mounted a parabolic reflector 5, in the center or axis of which lies the end of a filament 6 of the lamp. By this means the rays from the lamp would be projecting forward in parallel lines', if not intercepted.

rThe refractor is shown in the form of a shell 7 of somewhat conical form,` but slightly curved similar to the reflector.` At the inner end portion lof the shell 7 a lens 8 is formed in the shell, that is shown as convex on both its faces. The front portion of the shell 7 is provided with an outwardly extending annular flange 9. This is adapted to be mounted in the extended flange portion 10 of the lamp shell or frame 5, by any suitable means, such as ring washers 11 and this refractive effect, I form this wall with irregular surfaces. These may be different on the inner and outer wall; as shown the inner wall of the shell 7 is formed with annular ridges 14, being substantiallycorrugated. The outer wallv is shown as Yhaving thereon radially extended corrugations 15 that extend transversely to the ridges on the inner side, the lens 8 and ridges 14 and cor.-

rugations 15 as shown being formed integral' with the shell 7. The eect of these ridges will be to cause very strong diffusion of the light rays from the reflector 5 and this will practically eliminate theI glare from .the lamp, the center cone of rays can be projected on to a small object a considerable distance ahead, but will not cause the blinding effect that would result from the parabolic reiector 5 if this diffusing member were not employed.

What I claim is:

1. The combination with a substantially parabolic reiector having a source of light on the line of its axis .at the rear of the reflector, o f a substantially parabolic concavo-convex refractor supported inthe reflector and having its line of axis coincident with the line of axis of the reiector and its apex near the source of light, a lens at the apex of the refractor for cooperating with the source of light, means for diffusing light arran eden the interior of.

the line of axis of the reector and its apex nea-r the source of light, a lens at the apex of the. refractor for cooperating with the source of light, annular ridges on the interior of thc refr-actor and extending in series forwardly from said lens, and a, series of corrugations on the exterior of the refractor and raxliatinq from the lens and extending forwardly therefrom.

K 3. The combination with a substantially 4 parabolic reflector having a source of light on the line of its axis at the rear of the of the reflector, of a substantially conical concevo-convex refractor supported in the reflector and having its line of axis coinc-identwith the line of axis of the reflector and its apex near the source of li ht, u double convex lens 'at the apex of tie refractor for cooperating with the source of light, annular ridges on the interior of the refractor and extending in series forwardly from said lens, and a series of corrugations on the exterior of the refrector and radiating from the lens and extending forwardly therefrom.

Signed at New York in the county of New York and State of New York this 23rd day of November A. D. 1923.

JAMES G. NOLEN.