| 摘要 |
A head cover and safety helmet having detachable ventilating means, and removable filter collar. The head cover, or shell, is formed of rigid material, having a face opening with a primary transparent shield yieldably mounted thereon, and multiple secondary transparent shields yieldably mounted on the primary shield, and a collar filter having novel means for mounting same in the head cover, and a novel skirt for protecting the user. The secondary shields are arranged in staggered relation, and have one end exposed so that when scratched or soiled, they may be easily removed by the user finger gripping the exposed end of the top secondary shield and pulling it free of the retaining band.
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