Illumination – Self powered lamp – With movable focusing element
Reexamination Certificate
1999-05-21
2001-09-18
O'Shea, Sandra (Department: 2875)
Illumination
Self powered lamp
With movable focusing element
C362S098000, C362S103000, C362S105000, C362S184000
Reexamination Certificate
active
06290368
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to portable reading lights; and, more particularly, to a light device adapted to be worn by a user or the like.
2. Related Art
Reading lights are well known in the art. In my U.S. Pat. No. 5,558,428, I disclose a portable reading light adapted to be worn about the head of a user. The light of the device projects a beam for reading a book or magazine or the like and is adjustable. The light of the device diffuses a beam substantially uniformly over a quadrilateral area so that the user can read a book or magazine with comfort.
Although this light device works quite well, the bulb used, disposed at the head of the user, generates quite a bit of heat. Increasing the intensity of the bulb to increase the amount of light generated would only add to the heat problem.
In my pending application Ser. No. 08/847,292, filed Apr. 24, 1997, I disclose another portable reading light device adapted to be worn about the head of a user or the like. This device utilizes a projection housing adapted to be used as the light source having the terminal end of a fiberoptic mounted therein, the other end extending to a remote lamp unit having a reflector and a light bulb mounted therein.
While this light device also works quite well, fiberoptics are quite expensive and the equipment used to generate the light output is cumbersome and expensive.
There is a need for a lightweight reading light that generates a bright, focused rectangular light using little power.
SUMMARY OF THE INVENTION
It is an object of this invention to provide a reading light using LEDs as the output of the light source.
It is still further an object of this invention to carry out the foregoing object directing the light source into a rectangular beam thereby making efficient use of light.
It is still further an object of this invention to carry out the foregoing objects spreading the light out more evenly than prior art devices.
These and other objects are preferably accomplished by providing a portable reading light device that utilizes LEDs as the light source focused through a series of lenses.
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O'Shea Sandra
Oppenheimer Wolff & Donnelly LLP
Ward John Anthony
LandOfFree
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