Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS1260387 A
Publication typeGrant
Publication dateMar 26, 1918
Filing dateAug 10, 1917
Priority dateAug 10, 1917
Publication numberUS 1260387 A, US 1260387A, US-A-1260387, US1260387 A, US1260387A
InventorsEmil G Johanson
Original AssigneeEmil G Johanson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Reflector.
US 1260387 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

REFLECTOR.

APPucAnoN FILI-:u Auc.,1o,1911.

Patented Mar. 26, 1918.

LQESQY.

ATTORNEYS.

mi@ @TAS PAENT EMIL G. JOHANSGN, OF CHICAGO, ILLNOIS.

REFLECTOR.

Application filed August 10, 1917.

To @ZZ whom it may concern:

Be it known that I, EMIL Gr. JOHANSON, a subject of the King of Sweden, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Reflectors, of which the following is a specification.

This invention relates to reflectors for automobile lamps and the like, and its object is to provide a reflector which increases the brilliancy of the light, at the same time diffusing the same so as to eliminate glare.

With the above object in mind, reference is had to the accompanying drawing forrning a part of this specification, in which Figure l is an interior view of the reflector, and Fig. 2 is a longitudinal section thereof.

Referring specifically to the drawing, it will be observed that the reflector 5 is of conventional parabolic form, and may be made of vmetal with the interior silvered. The rim of the reflector is formed with an external flange 6 vfor application to the lamp casing, and the center is apertured, as shown at 7, to permit an electric lamp bulb to be screwedinto the back of the lamp casing.

The side walls of the reflector are pressed with a series of concavo-conveX units or cups 8, of circular outline. The cups are arranged in circular rows parallel to the rim of the reflector, and said rows are grouped in close order, so as to cause the cups to make marginal contact with one another. As shown, the cups forming one row are staggered with respect to those forming the next row, and similarly in succeeding rows.

The back portion of the reflector is formed with a center-piece design, pressed in the same manner as the cups 8 aforedescribed, but composed of elongated units 9 extending outward radially from the central aperture 7 of the reflector.

Due to the conical form of the reflector,

Gopiea of this patent may be obtained for Specification of Letters Patent.

Patented Mar. 26, ilwf.

Serial No. 185,499.

the cups 8 gradually decrease in size as they depart from the rim, the diameter of each succeeding' circular row of cups becoming less as the back of the reflector is approached.

lVith the above described reflector in use, it will be evident that each of the cups 8 and center units 9 will increase the power of the reflector by acting as a reflector of itself. The light emitted by the lamp will therefore be brilliant, but still projected bodily forward due to the parabolic curvature of the reflector walls. The numerous reflector units S will, however, break up or diffuse the reflected rays making up the shaft of light emitted by the lamp, thus eliminating the glare or blinding eect considered objectionable in lamps of the type mentioned.

I claim 1. A reflector having its reflecting surface provided with plurality of separate re iecting units which are circular and concave, and arranged in concentric circles, the units in the circles increasing in diameter radially outward from the center of the reflector.

2. A reflector having its reflecting surface provided with a plurality of separate concave reflecting units which are circular in contour and arranged in concentric circles, the units in the circles increasing in diame ter radially outward from the center of the reiector.

3. A reflector comprising a parabolic shell having its inner surface provided with a plurality of separate concave reflecting units which are circular in contour and arranged in concentric circles, the units in the circles increasing in diameter radially outward from the center of the reflector.

In testimony whereof I ax my signature.

EML G. JOHANSON.

iive cents each, by addressing the Commissioner of Patente,

Washington, D. C.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4035631 *Dec 15, 1975Jul 12, 1977General Electric CompanyProjector lamp reflector
US4143412 *Jun 21, 1977Mar 6, 1979Sassmannshausen KnutLighting fixture, for a tail, warning or signal light
US4277821 *Mar 9, 1979Jul 7, 1981Sassmannshausen KnutLamp
US5678921 *Dec 6, 1994Oct 21, 1997Bright Star Industries, Inc.Flashlight
Classifications
U.S. Classification362/348, D26/139
Cooperative ClassificationF21V7/04