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US 2010/0206954 A1Published application
Map distance calculator
OwnerHenricus Antonius Kempsinventor
Life of this patent
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OwnerHenricus Antonius Kempsinventor
Estimating the term…
A map distance calculator including a linear scale that to measure a specified distance on a map such as, for example, a scaled map of a golf course. The map distance calculator includes a double logarithmic scale that can be moved relative to the linear scale to easily calibrate the calculator 40 to a scaled map. The linear scale is printed on a substantially planar base member in the form of a rectangular sleeve member. A first part of the double logarithmic scale is printed on a sliding member that is slidably coupled to the sleeve member. The sleeve member is formed with an elongate window in its upper face extending adjacent to and parallel with the linear scale. A second part of the double logarithmic scale is printed along an edge of the window. The map distance calculator can be used on a map with a unique scale and subsequently used to directly read off the actual distance.
A map distance calculator for calculating the actual distance from a scaled map, the calculator comprising:
A map distance calculator as defined in any one of the preceding claims, wherein the linear scale has uniform intervals spaced at one millimetre increments, and the double logarithmic scale has non-uniform intervals indicating the actual distance measured in metres.
A map distance calculator substantially as herein described with reference to and as illustrated in any one or more of the accompanying drawings.
Dependencies are inferred from the claim text.