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US Patent 7,575,319 Filed: 13 June 2008

US Patent 7,575,319
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A spectacle set includes a primary spectacle and a detachable shelter frame. The primary spectacle includes two lenses, a primary bridge extended between two inner sides of the lenses respectively. The detachable shelter frame includes two shelter lenses, a shelter bridge extended between two inner sides of the shelter lenses, and a mounting arrangement comprising first through third supporting members and rearwardly extended from the shelter bridge to engage on the primary bridge so as to support the shelter lenses aligning with the lenses respectively, and a retention member rearwardly extending to apply an urging force against the primary bridge to engage with the primary bridge when the detachable shelter frame is mounted in front of the primary spectacle so as to substantially retain the detachable shelter frame in a balance manner.

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