Sanding machine with orbital and reciprocating motions

Claim 1

IN A PORTABLE SANDING MACHINE HAVING A MOTOR HOUSING, A VIBRATORY RECTANGULAR SHAPED PLATEN SUPPORTING THE HOUSING AND HAVING MEANS FOR RELEASABLY SECURING SANDING SHEETS, AND A DRIVEN ORBITALLY MOVING VERTICALLY DISPOSED CRANK SHAFT SUPPORTED FROM THE HOUSING PROXIMATE THE PLATEN, A GUIDE BLOCK CENTRALLY LOCATED AND FIXEDLY SECURED TO THE TOP SURFACE OF SAID PLATEN AND INCLUDING AN OPEN RECTANGULAR SLOT DISPOSED BELOW SAID SHAFT AND WITH ITS LONG AXIS ARRANGED PERPENDICULAR TO THE LONG AXIS OF THE PLATEN, A FOLLOWER MEMBER SLIDABLY SUPPORTED ON SAID PLATEN SURFACE AND MOUNTED FOR RECIPROCATORY MOVEMENT IN AND ALONG THE LONG AXIS OF SAID SLOT, A BEARING MOUNTED IN SAID FOLLOWER MEMBER AND RECEIVING SAID SHAFT THEREBY GIVING SAID FOLLOWER MEMBER THE ORBITAL MOTION OF SAID SHAFT AND GIVING SAID PLATEN A SUBSTANTIALLY STRAIGHT LINE MOTION, AND MEANS TO LOCK SAID FOLLOWER MEMBER RELATIVE TO SAID PLATEN WHEREBY TO GIVE SAID PLATEN THE ORBITAL MOTION OF SAID SHAFT, SAID MEANS COMPRISING AN ELONGATED LOCKING MEMBER SLIDABLY SUPPORTED ON SAID PLATEN SURFACE AND GUIDED FOR SLIDING MOVEMENT BY SAID GUIDE BLOCK ALONG AN AXIS PARALLEL TO THE LONG AXIS OF SAID PLATEN WHEREBY TO BRING ONE END OF SAID LOCKING MEMBER ADJACENT ONE SIDE OF SAID FOLLOWER MEMBER, SAID LOCKING MEMBER END AND SAID FOLLOWER MEMBER SIDE BEING PROVIDED WITH RIGID MATING AND INTERLOCKING ABUTMENTS COMPRISING SQUARE CORNERED BLOCK AND RECEPTACLE PORTIONS AND MATING ANGLED FLAT FACES JOINED TO SAID BLOCK AND RECEPTACLE PORTIONS, LEVER MEANS PIVOTED ON SAID PLATEN AND CONNECTED TO SAID LOCKING MEMBER FOR BRINGING SAID PORTIONS AND FACES OF SAID ABUTMENTS INTO ENGAGEMENT, AND A COILED SNAP ACTION TYPE WIRE SPRING HAVING ONE END SECURED TO SAID LEVER AND ONE END SECURED TO SAID GUIDE BLOCK AND BEING EFFECTIVE TO HOLD AND SNAP SAID LOCKING MEMBER INTO LOCKING AND UNLOCKING POSITIONS.