1976-11-16
1978-02-07
O'Connor, Edna M.
354219, 354225, G03B 1320
Patent
active
040729699
ABSTRACT:
A ranging system for a camera is provided including a reflecting means and marking means including movable masking means reflected thereby into the viewfinder of a camera. The reflecting means within the scope of this invention includes means for translating an axial movement of the movable masking means to the camera viewfinder as a positional movement transverse to the actual displacement direction thereof. To effect this image transfer, the marking means includes at least one mirror mounted adjacent to the masking means at an angle of about 45 degrees to the displacement direction thereof. According to one embodiment of the invention, an annular mark is projected into the viewfinder. To project an image of this character, the marking means includes an interiorly mirrored conical member, and the masking means includes a mandrel axially mounted therein, the mandrel being displaceable along the conical axis. According to another embodiment of the invention, the marking means includes mirrored polyhedronal side walls and the masking means includes a polygonal member movable within the area of the mirrored side walls.
REFERENCES:
patent: 3029720 (1962-04-01), Leitz et al.
patent: 3667366 (1972-06-01), Engelsmara et al.
patent: 3719422 (1973-03-01), Lard et al.
Balda-Werke Photographische Gerate und Kunststoff GmbH & Co. KG.
O'Connor Edna M.
Schuldenfrei Howard I.
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