Optical: systems and elements – Lens – With support
Patent
1997-01-03
1998-05-19
Ben, Loha
Optical: systems and elements
Lens
With support
359800, 359803, 359808, G02B 702
Patent
active
057543496
ABSTRACT:
A retractable magnifier includes an enclosure and a frame slidably mounted in the enclosure. The frame is slidable between a retracted position and two extended positions. A magnifying lens is mounted in the frame such that the lens is enclosed by the enclosure when the frame is in the retracted position, and such that the lens is exposed when the frame is in the extended position. A light with electric terminals is mounted in the frame, and is connected through a pair of conductive springs to a power source. One end of one spring is slidable in a slot in the frame to engage a switch terminal to automatically switch the light on when the frame is extended, and off when the frame is retracted.
REFERENCES:
patent: 4037940 (1977-07-01), Yates et al.
patent: 5325232 (1994-06-01), Lahcanski et al.
Ben Loha
Sunrich Manufactory Ltd.
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