Fastener driving tool

Claim 1

A fastener driving tool for automatically feeding a component and fastening the same in position by driving a fastener therethrough into a workpiece, said tool comprising: a housing including structure defining a drive track and a fastener driving member movable through said drive track and operable through a drive stroke, a first magazine assembly for supplying successive components from an integral component strip to said guide track, a second magazine assembly for supplying fasteners to said drive track intermediate said first magazine assembly and said fastener driving device, a safety assembly movable to a given position by engagement with a workpiece to permit operation of the tool, and a pusher in said first magazine engageable with said strip to advance said components, said pusher extending into the path of movement of the safety assembly when the number of components in the magazine is reduced to a given point to prevent movement of the safety assembly to said given position to prevent firing of said tool, said safety assembly including a shear means movable adjacent the components when the safety assembly is moved to said given position to sever the component in the drive track from the strip of components, said shear means engaging the pusher when the supply of components in the magazine is exhausted to prevent movement of the safety assembly to the given position.