Hand-held map viewer and navigational aid

Details Hand-held map viewer and navigational aid Hand-held map viewer and navigational aid

1981-01-28

1983-12-27

Haroian, Harry N.

Optics: image projectors

Target, map or navigation projection

350241, G03B 2100

Patent

active

044227388

ABSTRACT:
A hand-held navigational tool including one or more maps, preferably in the form of photograhic transparencies, releasably mounted upon a base for viewing through an opening in the base and rotatable about the center of the opening relative to course bearing indicia carried on a transparent graticule which is superposed with the viewed portion of the map. The viewer is carried on a member movably linearly in any direction in a plane parallel to that of the map to allow magnified viewing of a portion of the map while permitting visual excursion over the entire map. A compass, relative distance scales, map illumination means and selectively operable means for scribing a course line in the map holder or rotating the viewed portion of the map about a fixed point are all additional features which may be incorporated in the unit.

REFERENCES:
patent: 2267649 (1941-12-01), Graves
patent: 2503550 (1950-04-01), Food
patent: 4094589 (1978-06-01), Brown
patent: 4149783 (1979-04-01), Latady

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