Abstract: The invention is an tool for measuring and marking wall sheathing materials such as drywall, veneer, paneling, and various other wall sheathing materials. The tool provides rolling contact to protect finished surfaces and also maintains parallel positioning to maximize accuracy.

Abstract: A portable device for providing air to those trapped within a smoke-filled building includes a base member for mounting a building opening such as a window, an air conduit such as an air hose mounted on the base and capable of being lowered to an area having breathable air, and an extendable boom for positioning the air conduit away from the building. A user simply connects a breathing instrument to the air conduit after lowering, to receive breathable air.

Abstract: A system for providing air to users trapped within a smoke-filled building includes a series of piping mounted to or built inside of the exterior wall of a building. The ground end of the piping has a ventilation mechanism which draw air through a screen and into the piping. At the user end, a breathing instrument is plugged into a breathing instrument connector which is attached to the piping, to provide air to the user. An intercom system is included for the user to communicate with rescuers. The piping has a decompression valve to relieve pressure built up in the system.