Definitions for "Kettle hat"
a plain iron hat with a broad brim, nearly identical to the civil defense helmets of the 20th century, or those of English “doughboys” in the First World War. The kettle-hat was common defense from the 12th through 15th centuries.
An open-faced helmet consisting of a bowl and a broad brim, resembling the British 'tin hats' of World War I. Also called a 'Chapel de Fer'.
Simple open-faced helmet consisting of a skull with a wide brim