Historical information
A pocket-sized device for measuring wind speed
Held up with the aperture in the back facing into the wind, the device works mechanically through a spring system and displays results across four scales:
- Beaufort scale
- Knots
- Miles per hour (mph)
- Metres per second (m/s)
The measurement of wind speed aids in fire management
Physical description
circular device 5.5 cm diameter, 2 cm deep with a dial
Inscriptions & markings
W10 US Pat 4,713,972 – Made in Germany – DE 352200102
