Portable machine shop apparatus

Claim 1

A POWER DRIVEN PORTABLE SHOP MECHANISM COMPRISING A POWER UNIT; A TRANSMISSION HOUSING FOR SAID UNIT HAVING DRIVING CHAIN SPROCKETS OF DIFFERENT SIZES OPERATIVELY MOUNTED THEREON; A GUIDE PLATE RELEASABLY MOUNTED ON SAID HOUSING HAVING TAPERING END PORTIONS, EACH END OF WHICH GUIDE PLATE HAS A LONGITUDINALLY DIRECTED ADJUSTING SLOT EXTENDING AXIALLY TOWARD EACH END FROM THE CENTRAL PORTION, THE UPPER AND LOWER PERIPHERIES OF SAID PLATE FUNCTIONING AS SPROCKET CHAIN TRACKWAYS; AN INNER AND AN OUTER FRAME MEMBER RELEASABLY BOLTED TO EACH OTHER THROUGH THE SLOT IN SAID GUIDE PLATE, ON WHICH PLATE SAID FRAME MEMBERS ARE MOUNTED, SAID INNER AND OUTER FRAME MEMBERS CONSTITUTING A MAIN FRAME ASSEMBLY; A SPROCKET-MOUNTING SHAFT WHICH HAS A CENTERING CONE MOUNTED ON THE OUTER FRAME MEMBER; A SPROCKET MOUNTED UPON SAID SHAFT ALIGNED WITH THE TRACKWAYS OF SAID GUIDE PLATE; A SPROCKET CHAIN ENGAGING ONE OF SAID DRIVEN SPROCKETS AND THE SPROCKET ON SAID OUTER FRAME MEMBER; A BEARING MOUNTED IN ONE END OF SAID INNER FRAME CONCENTRICALLY WITH SAID SPROCKET-MOUNTING SHAFT; A TUBULAR COLLET JOURNALED IN SAID BEARING CARRIED BY A RING MEMBER OF SAID INNER FRAME MEMBER, SAID COLLET