Oscillating vibration table with air center

Claim 1

A VIBRATION TABLE COMPRISING: A BSE STRUCTURE; A PLATFORM STRUCTURE SUPPORTED BY SAID BASE STRUCTURE IN A GIVEN PLANE FOR MOVEMENT IN SAID PLANE AND HAVING A WORK SUPPORTING PORTION THEREON; ONE OF SAID STRUCTURES HAVING RECESSES EXTENDING LONGITUDINALLY IN THE DIRECTION OF MOVEMENT OF SAID PLATFORM; THE OTHER OF SAID STRUCTURES HAVING PROJECTIONS ELONGATED IN THE DIRECTION OF MOVEMENT OF SAID PLATFORM, SAID PROJECTIONS BEING PARALLEL TO SAID GIVEN PLANE AND EACH SAID PROJECTION EXTENDING INTO A RESPECTIVE RECESS WITH AN OPERATIVE CLEARANCE ON ALL SIDES OF NOT MORE THAN A FEW THOUNSANDTHS OF AN INCH; MEANS FOR SUPPLYING FLUID TO THE INTERIOR OF SAID RECESSES AT A PRESSURE ABOVE THE PRESSURE SURROUNDING THE VIBRATION TABLE TO FLOAT PLATFORM IN A SUBSTANTIALLY FRICTION FREE MEDIUM FOR MOVEMENT IN SAID GIVEN PLANE; MEANS FOR VIBRATING SAID PLATFORM IN THE DIRECTION OF MOVEMENT COMPRISING MAGNETS, EACH OF SAID MAGNET BEING DISPOSED AT AN END OF SAID PLATFORM AND HAVING A CENTRAL POLE PIECE EXTENDING TOWARD SAID PLATFORM WITH A BORE THEREIN, AND A RING POLE PIECE EXTENDING AROUND SAID CENTRAL POLE PIECE; A VIBRATION RESPONSIVE ARMATURE ON EACH OF SAID PLATFORM DISPOSED PARALLEL TO SAID GIVEN PLANE AND COMPRISING A COIL SUPPORT AND A COIL WRAPPED AROUND SAID COIL SUPPORT, SAID COIL SUPPORT COMPRISING A COLLAR DISPOSED AROUND SAID CENTRAL POLE PIECE IN SPACED RELATION THERETO; MEANS FOR SUPPLYING FLUID UNDER PRESSURE TO SAID BORES; AND MEANS FOR REGULATING THE PRESSURE OF THE FLUID FED TO SAID BORES TO CENTER SAID PLATFORM STRUCTURE BETWEEN SAID MAGNETS.