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Publication numberUS285270 A
Publication typeGrant
Publication dateSep 18, 1883
Publication numberUS 285270 A, US 285270A, US-A-285270, US285270 A, US285270A
InventorsJulius Jaegeb
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Julius jaegeb
US 285270 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

No Model.)

J. JAEGER.

. REFLECTOR. No. 285,270.- Patented Sept. 18, 1883.

WITNESSES: INVENTOR I c izzz 'us.fi ejer BY aim/K ATTORNEYS NA FETERS. Pnow-Lnhognplmn Washmglon. ac.

--UNITED STATES PATENT OFFICE.

JULIUS J AEGER, OF RUTHERFORD PARK, NEWV JERSEY.

REFLECTO R.

SPECIFICATION forming part of Letters Patent No. 285,270, dated September 18, 1883.

- Application filed April 19,1883. (No model.)

ridges of uniform height, said depressions be-.

ing of such form that they fit-each other so as to leave no fiat spaces between them. j On the ridges are formed small beads, whereby dark lines in the reflection are prevented.

In the accompanying drawings, Figure 1 represents a plan or face view of one of my plates on an enlarged scale. Fig. 2 is a partial section of the same on a larger scale thanthe previous figure.

Similar letters indicate corresponding parts. In the drawings, the letter A designates a plate for a reflector, which may be made of sheet metal, porcelain, glass, or any other ma terial suitable for the purpose, and which, when made of sheet metal or other opaque ma terial, is coated on its surface with silver or other material capable of receiving a bright polish, while when said plate is made of glass its back is coated with quicksilver or equivalent material, so as to produce the'desired reflecting-surface, all of which is well known in the art, and forms no part of my invention.

In order to obtain a reflector which, when exposed to the flame of a lamp, produces a reflection of uniform brightness throughout its entire area, I provide my plate with depressions a of trian ular sc uare or 01 'onal' shape, which are separated from each other by sharp or narrow ridges b, of uniform height, and which are so formed that no flat spaces are leftbetween them. For this reason pentagonal or octagonal or circular depressions will not answer, since, if either of these forms is used for the depressions, flat spaces of various shapes will be formed between said depres sions, and the reflection produced by such a plate shows dark lines or spots. depressions are of the form above described, so that they are separated from each other by sharp or narrow ridges b, as shown in the drawings, without flat spaces, the reflection produced is almost of a uniform brightness; 'but I have found that the effect can be improved by forming on these ridges small beads c, as shown in the drawings, said beads serving to prevent the formation of any dark lines in the reflection.

My plates can be used with advantage in conical, spherical, or parabolic reflectors, and also in reflectors of the form of a truncated pyramid, such as are in common use. My invention, however, is applicable to any reflecting-surface in which the above-described depression can be formed.

I am aware that plates for reflectors have been used which are provided with circular concavities, and also such provided with diamond-shaped projections, and I distinctly disclaim plates of this form.

What I claim as new, and desire to secure by Letters Patent, is-

1. A reflecting-surface provided with triangular, square, or polygonal depressions which are separated from each other by sharp or narrow ridges of uniform height, and which are of such a form as to leave no flat spaces between them, substantially as shown and described.

2. A' reflectingsurface provided with triangular, square, or polygonal depressions which are separated from each other by sharp or narrow ridges of uniform height, said ridges being formed with beads, substantially as and for thepurpose set forth.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

JULIUS JAEGER. [L s] Vitnesses:

W. HAUFF, H. G. BELL.

Then the v

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2481757 *May 23, 1945Sep 13, 1949Jungersen Thoger GOptical reflecting material
US3450459 *Oct 24, 1965Jun 17, 1969Haggerty Walter FRetroreflective device
US4726134 *Nov 21, 1986Feb 23, 1988Minnesota Mining And Manufacturing CompanyRoadway sign
US5237449 *Jan 29, 1991Aug 17, 1993Nelson Optics Company, Inc.Biased lenticular sign system
US5889615 *Jun 27, 1997Mar 30, 1999Minnesota Mining And Manufacturing CompanyDual axis retroreflective articles
US6253477 *Sep 23, 1998Jul 3, 2001Hallmark Technologies, Inc.Retro-reflective sign
US7425075Jan 28, 2005Sep 16, 2008Hubbell David AOptical reflecting material
US8015620Sep 3, 2009Sep 13, 20113M Innovative Properties CompanyVapor permeable retroreflective garment
US8256025Aug 15, 2011Sep 4, 20123M Innovative Properties CompanyVapor permeable retroreflective garment
US20090320193 *Sep 3, 2009Dec 31, 20093M Innovative Properties CompanyVapor permeable retroreflective garment
Classifications
Cooperative ClassificationF21V7/22