hardhat

• The valve was usually made to be adjusted by hand but -- like the Perspex faceplate that had replaced the original plate-glass built into the gun-metal frames when the "hardhat" diving suit was new in 1922 -- someone had re-rigged the valve so the spindle was extended through to the inside of the helmet, fitted at its inner extremity with a small disc. —  F ;SF - vol 090 issue 03 - March 1996
• Pebbles sifted down, rattling against his hardhat, and then the mountain lapsed into silence. —  F ;SF; - vol 087 issue 02 - August 1994
• Louise went ahead of the three of them, holding open the door to the control room, which had closed automatically after Reuben had entered Inside the control room, Louise put on her safety boots and hardhat, and Paul did the same; the hats had built-in lamps and hearing-protection cups that could be swung down when needed. —  Analog Science Fiction and Fact, January 2002
• Priya then puts on the bright yellow plastic hardhat issued by the company and goes off to the mines to break stones. —  Kafila
• Mad at Hat Rule: Sikh port truckers may challenge hardhat policy

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