Dental drill guide

Claim 1

APPARATUS FOR GUIDING A DENTAL DRILL FOR DRILLING CAVITIES IN TEETH, COMPRISING (A) A BASE PLATE ADAPTED TO BE SECURED ONTO THE CUTTING SURFACE OF A TOOTH, AND HAVING A PLANE SURFACE EXTENDING SUBSTANTIALLY TRANSVERSELY TO THE VERTICAL CENTERLINE OF THE TOOTH, WHEN SAID BASE PLATE IS SECURED THEREON, (B) A CARRIER PLATE HAVING A PLANE SURFACE, (C) RESILIENT CLAMPING MEANS REMOVABALY SECURING SAID CARRIER PLATE ON SAID BASE PLATE WITH SAID PLATE SURFACES DISPOSED IN CONFRONTING ENGAGEMENT, AND WITH PART OF SAID CARRIER PLATE PROJECTING BEYOND ONE SIDE OF SAID BASE PLATE, (D) COOPERATING MEANS ON SAID BASE PLATE, SAID CARRIER PLATE, AND SAID CLAMPING MEANS FOR GUIDING SAID CARRIER PLATE FOR MANUAL SLIDING MOVEMENT RELATIVE TO SAID BASE PLATE AND CLAMPING MEANS IN A DIRECTION GENERALLY PARALLEL TO SAID ONE SIDE OF DISENGAGE SAID CARRIER PLATE FROM SAID BASE PLATE AND CLAMPING MEANS, (E) A FIRST MEMBER, (F) MEANS CONNECTING SAID FIRST MEMBER AT ONE END TO SAID PROJECTING PART OF SAID CARRIER PLATE TO HAVE LIMITED UNIVERSAL MOVEMENT RELATIVE TO SAID CARRIER PLATE, INCLUDING PIVOTAL MOVEMENT ABOUT AN AXIS EXTENDING TRANSVERSELY TO SAID PLANE SURFACES, (G) A SECOND MEMBER CONNECTED TO THE OPPOSITE END OF SAID FIRST MEMBER TO PIVOT ABOUT AN AXIS EXTENDING PARALLEL TO THE PIVOTAL AXIS OF SAID FIRST MEMBER, (H) A THIRD MEMBER HAVING A CLAMP THEREON FOR GRIPPING AND HOLDING THE HEAD OF A DENTAL DRILL, AND (I) A PAIR OF PARALLEL LINKS, EACH OF WHICH IS PIVOTED AT ONE END OF SAID SECOND MEMBER AND AT ITS OPPOSITE END TO SAID THIRD MEMBER, SAID LINKS BEING OPPOSITE TO GUIDE SAID THIRD MEMBER FOR ARCUATE MOVEMENT ABOUT SAID SECOND MEMBER IN A PLANE CONTAINING SAID PIVOTAL AXIS OF SAID FIRST MEMBER.