Range Finder
OwnerJohn H. Allen, JR.inventor
Life of this patent
Estimating the term…
Abstract
Range finder for determining the distance between the user and an object of known height or width, such as a golf flagstick, structure, etc. The range finder is a flat card, having a series of graduated apertures, each aperture being dimensioned to correspond to a particular distance to the flagstick. Range information is provided for each aperture. The user holds the card 24 inches from the eye and sights the flagstick through the apertures. The range information for the aperture whose diameter most closely corresponds to the height of the sighted flagstick is the actual distance between the user and the flagstick. The apertures are graduated in size, to represent range information in specific increments. The size of the increments is selected to facilitate optimal performance and may vary within a series of apertures.
Claims14
Range finder for determining the distance of an object of a known or estimated object dimension, said range finder comprising:
- a card;
- a series of apertures on said card, each aperture having a dimension that is sized to correspond to a visual sighting of said object at a particular distance from said card, wherein said apertures on said card are circular and said dimension is a diameter of said each aperture, said each aperture having a different diameter;
- and
- a range information for said each aperture.
Range finder for determining the distance of an object of a known or estimated object dimension, said range finder comprising:
- a card;
- a series of apertures on said card, each aperture having a dimension that is sized to correspond to a visual sighting of said object at a particular distance from said card, wherein said apertures on said card have a shape that provides two or more dimensions, a first dimension representing a first range information and a second dimension representing a second range information, wherein said first range information is different from said second range information;
- and
- a range information for said each aperture.
Dependencies are inferred from the claim text.