Clear view screen
A clear view screen or clearview screen is a glass disk mounted in a window that rotates to disperse rain, spray, and snow. A clear view screen is typically driven by an electric motor at the center of the disk, and is often heated to prevent condensation or icing. Other common names for it include "clear sight", "spin window" and "rotating windshield wiper".
Clear view screens were originally developed in the mid-1930s for automobiles as a better option than standard windscreen wipers but were soon found more suitable for small boats and larger ships. On ships, a clear view screen is usually on the bridge and rotates at high speed (~1500 rpm). Clear view screens are also used in locomotives and rail transport.
Sasara Trams of Sapporo Streetcar are equipped with clear view screens
- Edgar de Normanville (1882-1968), developed the idea of a rotating disc to clear drops of water from a windscreen
- Hearst Magazines (December 1934). "Revolving Disk on Windshield Keeps Off Sleet and Rain". Popular Mechanics. Hearst Magazines. p. 873.
- Shooting the storm sequence through a clear view screen