Hand-held anemometer
OwnerAlden Schlossinventor
Life of this patent
Estimating the term…
Abstract
An instrument for measuring wind velocity, utilizing impact wind pressure against a movable vane. A spring is used as a mechanical reference and, as such, balances the impact wind force generated against the vane. Flexible means are used to transfer vane motion to a circular indicator disc, which is calibrated in wind speed. Design of kinematic geometry, as well as a unique, non-linear, spring arrangement are employed to counter the square law wind force. Such employment is essential to prevent crowding at the low end of the speed-indicating scale, while maintaining practical full scale values, in a highly sensitive instrument.
Claims9
An anemometer, comprising in combination, a vane to be exposed to the wind, said vane being pivotally mounted to a sub-chassis free to rotate in an arc due to force of said wind;
- connecting means connecting said vane to an upper flexible means, said flexible means extending to, wrapping about and attaching to a first drum section on a drum pivotally mounted on said sub-chassis;
- rotation of said vane causing a pull on said upper flexible means and causing same to unwrap from said first drum section, causing rotation of said drum;
- a lower flexible means attached to a second drum section on said drum and extending to and attaching to a spring mounted on said sub-chassis;
- rotation of said drum causing said lower flexible means to wind on to said second drum section and in so doing causing deflection of said spring;
- at some sufficient deflection, sufficient tension is applied to said lower flexible means to cause balance of the force applied by said wind;
- an indicator axially connected to said drum for the purpose of indicating wind speed at any position of said drum.
Dependencies are inferred from the claim text.