1987-11-16
1988-09-13
Punter, William H.
350243, 350546, G02B 2318, G02B 2320
Patent
active
047705191
ABSTRACT:
A novel drinking cup adaptable into binoculars consisting of a stackable, truncated conical frustum shaped drinking cup having a pair of spaced apart ocular lenses on one slanted side and a pair of objective lenses situated on the opposite slanted side, with oppositely located crease folds on the cup slanted sides opposite each other and midway between the ocular and objective lens. In addition, a pair of diverging creases are placed in the cup slanted side on opposite sides of one of the lengthwise crease line, the pair of diverging crease lines such that they diverge from a common meeting point at the end of the cup having the smallest diameter to the end of the cup having the largest diameter. After use as a drinking cup, the two crease lines on opposite sides of the cup are folded to result in the cup cross-section taking on the appearance of a cylinder having an elliptical cross-section, and then the two crease lines on opposite sides of one of the oppositely located crease lines are again folded to result in an elliptical or oval shaped straight tube having equal distance between each pair of ocular lens and objective lens. The binocular is focused by holding between the thumb and a finger and pressing the resulting ellipse to vary the distance between the ocular and the objective lenses.
REFERENCES:
patent: 3009567 (1961-11-01), Erickson
patent: 3397935 (1968-08-01), Natsume
patent: 4268111 (1981-05-01), Green
McClanahan J. Michael
Punter William H.
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