US2131629A - Reflector - Google Patents
Reflector Download PDFInfo
- Publication number
- US2131629A US2131629A US60566A US6056636A US2131629A US 2131629 A US2131629 A US 2131629A US 60566 A US60566 A US 60566A US 6056636 A US6056636 A US 6056636A US 2131629 A US2131629 A US 2131629A
- Authority
- US
- United States
- Prior art keywords
- face
- light
- reflector
- rays
- reflecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
- G02B5/126—Reflex reflectors including curved refracting surface
Definitions
- This invention relates to light reilecting means of the autocollimating type in which incident light is reflected back to-Ward its source and the reflecting means appears to be illuminated.
- An object of my invention is to provide an autocollimating reector of high eiciency which reflects a high percentage of the incident light.
- Figs. 1, 2 and 3 show side elevation, front or bottom plan, and perspective views respectively of the member constituting my invention.
- the reflector constitutes a body member 2 of transparent or translucent material, preferably glass, the front and rear faces of which are both formed by a plurality of cylindrical surfaces 4 and 6 which intersect at right angles to each other to 35 form cross flutes having their major axes parallel with the center lines of the body member, the rear surface being in this instance silver plated as at 8 to assist in reflecting the rays impinging thereon.
- the purpose of the forward surface is to converge the rays from some light source and send them to the rear surface where they are reflected back and sent out of the reflector in substantially the direction of their incidence.
- This member is adapted to be placed in any 5 desired or suitable supporting means and a plurality of these devices may be so placed in the support as to form any desired conguration so that upon light impinging thereon, the whole sign may be visible to anyone approaching, such, 10 as for example, ⁇ an approaching motor car, to give warning of a curve or crossroad.
- myY device is unitary and does not require any other means in combination therewith for reflecting the light 15 or for any other optical use, the only means necessary to complete a sign with my device being any suitable support and the support need not be thick as the device is short.
- a unitary device for reflecting light rays comprising, a block of transparent material having a first face formed by the intersection of two cylinders which cross each other at an angle, the axes of the two cylinders being parallel to the center lines of the block, and a second face opposite the first formed by the intersection of two cylinders which cross each other at an angle, the axes of the cylinders which form the second face being parallel to the axes of the cylinders which form the rst face, the portions of the first face being spaced from corresponding portions of the second face a distance such that light rays parallel to the axis of the device and passing through the surface of the first face are focused on the second face.
- a device as in claim 1 which includes, a light reflecting substance coating said second face.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Description
Patented Sept. 27, 1938 UNITED STATES PATENT GFFICE REFLECTOR poration of Delaware Application January 24, 1936, Serial No. 60,566
2 Claims.
This invention relates to light reilecting means of the autocollimating type in which incident light is reflected back to-Ward its source and the reflecting means appears to be illuminated.
5 It relates more specifically to reflecting means used in various signs such as danger signs, vadvertising signs, etc., that lie adjacent a highway and upon which the rays from the headlights of cars would fall and be reflected back thus causing illumination of the sign or signal and its visibility to the approaching cars. They are widely termed reflex buttons. This construction is somewhat similar to that shown in my copending applications Serial No. 60,564 led January 24, 1936 and Serial No. 60,565 filed January 24, 1936.
An object of my invention is to provide an autocollimating reector of high eiciency which reflects a high percentage of the incident light.
It is a further object of my invention to provide a reilector having a short major axis for space economy.
It is a still further object of my invention to provide a single unitary part capable of reflect- 25 ing the incident rays.
Figs. 1, 2 and 3 show side elevation, front or bottom plan, and perspective views respectively of the member constituting my invention. The reflector constitutes a body member 2 of transparent or translucent material, preferably glass, the front and rear faces of which are both formed by a plurality of cylindrical surfaces 4 and 6 which intersect at right angles to each other to 35 form cross flutes having their major axes parallel with the center lines of the body member, the rear surface being in this instance silver plated as at 8 to assist in reflecting the rays impinging thereon.
The purpose of the forward surface is to converge the rays from some light source and send them to the rear surface where they are reflected back and sent out of the reflector in substantially the direction of their incidence.
This member is adapted to be placed in any 5 desired or suitable supporting means and a plurality of these devices may be so placed in the support as to form any desired conguration so that upon light impinging thereon, the whole sign may be visible to anyone approaching, such, 10 as for example, `an approaching motor car, to give warning of a curve or crossroad.
The particular advantage of myY device is that it is unitary and does not require any other means in combination therewith for reflecting the light 15 or for any other optical use, the only means necessary to complete a sign with my device being any suitable support and the support need not be thick as the device is short.
I claim:
1. A unitary device for reflecting light rays comprising, a block of transparent material having a first face formed by the intersection of two cylinders which cross each other at an angle, the axes of the two cylinders being parallel to the center lines of the block, and a second face opposite the first formed by the intersection of two cylinders which cross each other at an angle, the axes of the cylinders which form the second face being parallel to the axes of the cylinders which form the rst face, the portions of the first face being spaced from corresponding portions of the second face a distance such that light rays parallel to the axis of the device and passing through the surface of the first face are focused on the second face.
2. A device as in claim 1, which includes, a light reflecting substance coating said second face.
JOI-IN L. KOUBEK. 40
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60566A US2131629A (en) | 1936-01-24 | 1936-01-24 | Reflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60566A US2131629A (en) | 1936-01-24 | 1936-01-24 | Reflector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2131629A true US2131629A (en) | 1938-09-27 |
Family
ID=22030316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US60566A Expired - Lifetime US2131629A (en) | 1936-01-24 | 1936-01-24 | Reflector |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2131629A (en) |
-
1936
- 1936-01-24 US US60566A patent/US2131629A/en not_active Expired - Lifetime
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