Light assembly with flexed thermoplastic fresnel lens
First Claim
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1. A light assembly comprising:
- a housing of thermoplastic resin having a convexly curved mouth;
an electric bulb disposed in said housing;
a fresnel lens of thermoplastic resin, wherein said fresnel lens comprises an originally flat lens which is flexed by a given degree to form said fresnel lens; and
means for securing said lens to the mouth of said housing while flexing same by said given degree. PG,12
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Abstract
Herein disclosed is an inexpensive light assembly which is easy to be produced and has aesthetic appearance. The assembly comprises a housing of thermoplastic resin having a convexly curved mouth, an electric bulb disposed in the housing, a lens of thermoplastic resin assuming a flat shape when no external stress is applied thereto, the lens being so constructed as to exhibit its desired optical performance when flexed by a given degree, and means for securing the lens to the mouth of the housing while flexing the same by the given degree.
40 Citations
18 Claims
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1. A light assembly comprising:
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a housing of thermoplastic resin having a convexly curved mouth; an electric bulb disposed in said housing; a fresnel lens of thermoplastic resin, wherein said fresnel lens comprises an originally flat lens which is flexed by a given degree to form said fresnel lens; and means for securing said lens to the mouth of said housing while flexing same by said given degree. PG,12 - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for producing a light assembly, comprising the steps of:
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preparing a housing of thermoplastic resin having a convexly curved mouth; flexing a flat lens of thermoplastic resin by a given degree to form a fresnel lens; and securing said lens to the mouth of said housing during said flexing step. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification