A head shield device having a frame and a replaceable lens. An engagement axle having an large dimension and a small dimension is attached to the frame. The lens defines an aperture with a neck and an enlarged inner body. The small dimension of the axle is adapted to pass through the neck and rotation of the axle to the large dimension locks the lens in place on the frame. The axle rotation is controlled by a control device located on a tab assembly forming the engagement axle.

 
Web www.patentalert.com

< Pants with cargo pocket to accommodate thigh rig

> System and method for remote, free-space optical detection of potential threat agent

> Scope with improved magnification system

~ 00591