Control system

Claim 1

A SYSTEM SUBSTANTIALLY AS DESCRIBED FOR CONTROLLING THE OPERATION OF AN ULTRA HIGH SPEED AIR TURBINE DRIVEN DENTAL DRILL, SAID SYSTEM INCLUDING IN COMBINATION A HANDPIECE FOR ROTATABLY SUPPORTING A DENTAL DRILL, AN AIR TURBINE WITHIN SAID HANDPIECE FOR DRIVING SAID DRILL, AIR JET MEANS SUPPORTED ON SAID HANDPIECE FOR PROJECTING A JET OF AIR AT THE BURR END OF SAID DRILL OUTSIDE SAID HANDPIECE, WATER JET MEANS SUPPORTED ON SAID HANDPIECE ADJACENT SAID AIR JET MEANS FOR PROJECTING A JET OF WATER AT THE BURR END OF SAID DRILL OUTSIDE SAID HANDPIECE, A SOURCE OF AIR UNDER A SUFFICIENT PRESSURE TO DRIVE SAID TURBINE OR ATOMIZE SAID JET OF WATER, A SOURCE OF WATER UNDER A SUFFICIENT PRESSURE TO COOL OR CLEAN THE TEETH BEING WORKED ON BY SAID DRILL, A FIRST AIR CONDUIT CONNECTING SAID TURBINE TO SAID SOURCE OF AIR, A WATER CONDUIT CONNECTING SAID WATER JET MEANS TO SAID SOURCE OF WATER, WATER UNDER PRESSURE FROM SAID SOURCE THEREOF TO SAID WATER JET MEANS, A SECOND AIR CONDUIT FOR CONDUCTING AIR UNDER PRESSURE FROM SAID SOURCE THEREOF TO SAID AIR JET MEANS, A THIRD AIR CONDUIT FOR CONDUCTING AIR UNDER PRESSURE FROM SAID SOURCE TO SAID SECOND AIR CONDUIT, SAID WATER CONDUIT INCLUDING IN SERIES BETWEEN SAID SOURCE OF WATER AND SAID WATER JET MEANS AN ADJUSTABLE WATER VALVE FOR SETTING THE RATE OF FLOW OF WATER THERETHROUGH AND AN ON AND OFF WATER VALVE FOR STARTING AND STOPPING THE FLOW OF WATER THERETHROUGH, SAID THIRD AIR CONDUIT INCLUDING IN SERIES BETWEEN SAID SOURCE OF AIR AND SAID SECOND AIR CONDUIT AN ADJUSTABLE AIR VALVE FOR SETTING THE RATE OF FLOW OF AIR THERETHROUGH AND A CHECK VALVE TO PREVENT ANY RETURN FLOW OF AIR FROM SAID SECOND AIR CONDUIT TO SAID THIRD AIR CONDUIT, SAID FIRST AIR CONDUIT BETWEEN SAID SOURCE OF AIR AND SAID AIR TURBINE INCLUDING A FILTER FOR SAID AIR, MEANS FOR PUTTING OIL IN SAID AIR TO OIL SAID TURBINE AND A LEVER OPERATED REACTION TYPE AIR PRESSURE MODULATING VALVE TO INCREASE THE AIR PRESSURE AT SAID TURBINE AND THE SPEED OF SAID DRILL IN RESPONSE TO THE MOVEMENT IN ONE DIRECTION OF SAID LEVER, SAID SECOND AIR CONDUIT INCLUDING BETWEEN ITS JUNCTION WITH SAID THIRD AIR CONDUIT AND SAID AIR SOURCE AN ON AND OFF AIR VALVE OPERABLE IN RESPONSE TO MOVEMENT IN THE OTHER DIRECTION OF SAID LEVER WHEN SAID MODULATING VALVE IS CLOSED TO ADMIT AIR UNDER PRESSURE FROM SAID SOURCE TO SAID AIR JET MEANS.

Claim 2

A SYSTEM SUBSTANTIALLY AS DESCRIBED FOR CONTROLLING THE OPERATION OF AN ULTRA HIGH SPEED AIR TURBINE DRIVEN DENTAL DRILL, SAID SYSTEM INCLUDING IN COMBINATION A HANDPIECE FOR ROTATABLY SUPPORTING A DENTAL DRILL, AN AIR TURBINE WITHIN SAID HANDPIECE FOR DRIVING SAID DRILL, AIR JET MEANS SUPPORTED ON SAID HANDPIECE FOR PROJECTING A JET OF AIR AT THE BURR END OF SAID DRILL OUTSIDE SAID HANDPIECE, WATER JET MEANS SUPPORTED ON SAID HANDPIECE ADJACENT SAID AIR JET MEANS FOR PROJECTING A JET OF WATER AT THE BURR END OF SAID DRILL OUTSIDE SAID HANDPIECE, A SOURCE OF AIR UNDER A SUFFICIENT PRESSURE TO DRIVE SAID TURBINE OR ATOMIZE SAID JET OF WATER, A SOURCE OF WATER UNDER A SUFFICIENT PRESSURE TO COOL OR CLEAN THE TEETH BEING WORKED ON BY SAID DRILL, A FIRST AIR CONDUIT CONNECTING SAID TURBINE TO SAID SOURCE OF AIR, A WATER CONDUIT CONNECTING SAID WATER JET MEANS TO SAID SOURCE OF WATER, WATER UNDER PRESSURE FROM SAID SOURCE THEREOF TO SAID WATER JET MEANS, A SECOND AIR CONDUIT FOR CONDUCTING AIR UNDER PRESSURE FROM SAID SOURCE THEREOF TO SAID AIR JET MEANS, A THIRD AIR CONDUIT FOR CONDUCTING AIR UNDER PRESSURE FROM SAID SOURCE TO SAID SECOND AIR CONDUIT, SAID WATER CONDUIT INCLUDING IN SERIES BETWEEN SAID SOURCE OF WATER AND SAID WATER JET MEANS AN ADJUSTABLE WATER VALVE FOR SETTING THE RATE OF FLOW OF WATER THERETHROUGH AND AN ON AND OFF WATER VALVE FOR STARTING AND STOPPING THE FLOW OF WATER THERETHROUGH, SAID THIRD AIR CONDUIT INCLUDING IN SERIES BETWEEN SAID SOURCE OF AIR AND SAID SECOND AIR CONDUIT AN ADJUSTABLE AIR VALVE FOR SETTING THE RATE OF FLOW OF AIR THERETHROUGH AND A CHECK VALVE TO PREVENT ANY RETURN FLOW OF AIR FROM SAID SECOND AIR CONDUIT TO SAID THIRD AIR CONDUIT, SAID FIRST AIR CONDUIT BETWEEN SAID SOURCE OF AIR AND SAID AIR TURBINE INCLUDING A FILTER FOR SAID AIR, MEANS FOR PUTTING OIL IN SAID AIR TO OIL SAID TURBINE AND A LEVER OPERATED REACTION TYPE AIR PRESSURE MODULATING VALVE TO INCREASE THE AIR PRESSURE AT SAID TURBINE AND THE SPEED OF SAID DRILL IN RESPONSE TO THE MOVEMENT IN ONE DIRECTION OF SAID LEVER, SAID SECOND AIR CONDUIT INCLUDING BETWEEN ITS JUNCTION WITH SAID THIRD AIR CONDUIT AND SAID AIR SOURCE AN ON AND OFF AIR VALVE OPERABLE IN RESPONSE TO MOVEMENT IN THE OTHER DIRECTION OF SAID LEVER WHEN SAID MODULATING VALVE IS CLOSED TO ADMIT AIR UNDER PRESSURE FROM SAID SOURCE TO SAID AIR JET MEANS.