Automatic feed pencil apparatus

Claim 1

A PENCIL APPARATUS FOR ADVANCING A LEAD CONTAINED THEREIN AND COMPRISING: A BASE MEMBER, A SLIDING SUPPORT MEMBER MOVABLY SUPPORTED FOR LINEAR MOVEMENT ON SAID BASE MEMBER AND HAVING AN EXTENDING SUPPORT PLATFORM CONTAINING A BORE THERETHROUGH SUBSTANTIALLY PARALLEL TO THE LINEAR MOVEMENT OF SAID SLIDING SUPPORT MEMBER ON SAID BASE MEMBER, AN ELONGATED LEAD HOLDER JOINED TO THE PLATFORM ON SAID SLIDING SUPPORT MEMBER AND HAVING A FIRST END EXTENDING THROUGH THE BORE IN SAID SLIDING SUPPORT MEMBER AND A SECOND END EXTENDING THEREFROM, SAID LEAD HOLDER FURTHER HAVING AN AXIAL BORE THERETHROUGH FOR CONTAINING THE LEAD AND BEING INTERNALLY THREADED AT THE FIRST END PORTION AND TERMINATING AT THE SECOND END IN CHUCK MEANS FOR RESISTING THE FREE AXIAL PROTRUSION OF THE LEAD, A LEAD ADVANCE SCREW HAVING A FIRST END IN THREADED ENGAGEMENT WITH THE THREADED END OF SAID LEAD HOLDER TO BE IN ABUTMENT WITH THE INNER END OF THE LEAD AND A SECOND END EXTENDING FROM SAID LEAD HOLDER, AND ACTUATING MEANS JOINED TO SAID APPARATUS AND ENGAGING THE EXTENDING SECOND END OF SAID LEAD ADVANCE SCREW FOR ROTATING SAID LEAD ADVANCE SCREW IN SAID LEAD HOLDER AND THEREBY ADVANCE THE END OF THE LEAD PROTRUDING FROM THE CHUCK MEANS ON THE SECOND END OF SAID LEAD HOLDER.