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US-9802716-B2 · Oct 31, 2017 · US
Method of retrofitting a runway sign with a single LED lamp
US8938877B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8938877-B2 |
| Application number | US-201313743558-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 17, 2013 |
| Priority date | Jan 17, 2013 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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A method of retrofitting an existing airfield runway sign with a single LED lamp. Light is produced by a linear array of white-light LEDs. A cylindrical lens is mounted longitudinally adjacent to the LEDs, and collects a central portion of the light emitted from the LEDs. A pair of inclined surfaces extend from the lateral edges of the LEDs to respective lateral edges of the cylindrical lens. The inclined surfaces have a rough surface texture and reflect light diffusely. The inclined surfaces collect a peripheral portion of the light emitted from the LEDs, and direct the reflected light toward the cylindrical lens. The LEDs, cylindrical lens and inclined surfaces are all mechanically supported by a heat sink. The replacement lamp is placed into a runway sign near its top or bottom edge, and illuminates both viewing surfaces of the runway sign simultaneously without a diffuser.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of retrofitting a two-sided airport runway sign ( 10 ) adjacent a runway, the runway sign ( 10 ) being rectangular in profile and emitting light through rectangular, translucent front and rear faces ( 11 ), the front and rear faces ( 11 ) being longitudinally separated by first and second opposing longitudinal edges ( 17 , 16 ) and being perpendicular to the runway, the runway sign ( 10 ) including a plurality of original equipment lamps in its inte…
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Cross-Sectional Technologies · mapped topic
Cross-Sectional Technologies · mapped topic
Cross-Sectional Technologies · mapped topic
- B64F1/002Primary
Operations & Transport · mapped topic
Cross-Sectional Technologies · mapped topic
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Frequently asked questions
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- What does patent US8938877B2 cover?
- A method of retrofitting an existing airfield runway sign with a single LED lamp. Light is produced by a linear array of white-light LEDs. A cylindrical lens is mounted longitudinally adjacent to the LEDs, and collects a central portion of the light emitted from the LEDs. A pair of inclined surfaces extend from the lateral edges of the LEDs to respective lateral edges of the cylindrical lens. T…
- Who is the assignee on this patent?
- Tessnow Thomas, Albright Kim, Boyd Jr Ronald E, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification B64F1/002. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).