US 5,469,738 A · Wind speed indicator

Abstract

A wind speed indicator includes a series of spaced individual indicia provided on a member which is rotatable in response to movement of air caused by the wind. The indicia may take the form of individual dots spaced equally about the circumference of a circle centered on the axis of rotation of the rotatable member so that, when the rotatable member is rotated, the dots cooperate to define a virtual ring when rotated above a predetermined angular velocity in response to a predetermined threshold wind speed. Additional series of individual indicia, such as dots, are formed about succeeding smaller concentric circles and are spaced farther apart. As wind speed increases, additional virtual rings are apparent to indicate when wind speed has exceeded additional predetermined thresholds. The indicia can either be provided on an impeller which is directly rotated by the wind, or on a rotatable member which is rotatably driven in response to rotation of a separate impeller rotatably driven by the wind. In a preferred form, the components are incorporated into a system resembling that of a weather vane in order to simultaneously provide an indication of wind direction and an indication of wind speed.

Claims19

Dependent claims

A wind speed indicator, comprising:

a rotatable member rotatably driven by the wind;
and
spaced, individual wind speed indicia on the rotatable member for blending into a virtual ring, wherein the spaced individual wind speed indicia comprises at least two bands of indicia, the indicia in a first one of the bands being spaced differently than the indicia in a second one of the bands, wherein the blending of the indicia in each band into a virtual ring indicates that wind speed exceeds a predetermined threshold.

Dependencies are inferred from the claim text.

Wind speed indicator

Life of this patent

Wind speed indicator

Life of this patent

Abstract

Claims19