Above OSU art professor Hoyt Sherman (left), with OSU football quarterback Pandel Savic, demonstrating the “flash helmet,” a modified football practice helmet with a visor that Sherman could open and close very quickly by means of a cord. During the brief exposure, the passer had to spot the receiver, then throw the ball while the visor was closed. Below right is Sherman’s drawing of the flash helmet.
Above During World War II, aircraft and ship identification silhouettes (in the form of decks of playing cards) were widely distributed to US citizens and military personnel.