Classic Cup Anemometer - Historical Wind Speed Measurement Instrument #3763226 (License: Personal Use)

This black-and-white illustration depicts a classic cup anemometer featuring four hemispherical cups mounted on horizontal arms radiating from a central vertical shaft. The cups are designed to catch wind asymmetrically, causing rotation proportional to wind velocity, which is transmitted through gears or magnets to a counter or digital sensor. Such instruments have been foundational in meteorology since the 19th century and remain widely used today due to their reliability and simplicity.

Used in educational materials, weather station documentation, historical science exhibits, and technical manuals; ideal for users researching meteorological instruments, physics education, or vintage engineering designs.