Chain saw bar adjusting device

Claim 1

FOR USE IN COMBINATION WITH A CHAIN SAW HAVING A FRAME WITH A PAIR OF SPACE LATERALLY EXTENDING STUDS, A GUIDE BAR HAVING AN ELONGATED SLOT AT ITS REAR END OF SLIDABLY RECEIVING SAID STUDS, A SAW CHAIN EXTENDING PERIPHERALLY ALONG SAID GUIDE BAR, AND LOCKING NUTS MOUNTED UPON SAID STUDS TO CLAMP SAID GUIDE BAR TO SAID FRAME, AN ADJUSTING DEVICE INTERPOSED BETWEEN SAID GUIDE BAR AND SAID LOCKING NUTS FOR SELECTIVELY SHIFTING SAID GUIDE BAR IN A CHAIN TIGHTENING DIRECTION, SAID ADJUSTING DEVICE COMPRISING A PLATE MEMBER HAVING AN ELONGATED SLOT THEREIN SIMILAR TO SAID GUIDE BAR SLOT, AN ADJUSTING LEVER HAVING A SLOT AT ONE END AND AN ENGAGEMENT SURFACE AT ITS OTHER END, AND MEANS PIVOTALLY CONNECTING SAID ADJUSTING LEVER AND SAID PLATE MEMBER TO EACH OTHER WITH THEIR RESPECTIVE SLOTS AT LEAST PARTIALLY OVERLYING AND INTERSECTING ONE ANOTHER, SAID ADJUSTING DEVICE BEING MOUNTABLE UPON SAID CHAIN SAW WITH ONE END OF SAID STUDS EXTENDING THROUGH SAID PLATE MEMBER AND SAID ADJUSTING LEVER SLOTS, SAID MEANS ENGAGING SAID GUIDE BAR FOR MOVEMENT THEREOF WHEN SAID ADJUSTING DEVICE IS MOUNTED UPON SAID CHAIN SAW, SAID ADJUSTING LEVER BEING PIVOTABLE IN RESPONSE TO AN ACTUATING FORCE APPLIED TO ITS ENGAGEMENT SURFACE TO THEREBY MOVE SAID MEANS AND CAUSE SAID GUIDE BAR TO MOVE BOTH FORWARDLY AND UPWARDLY TO TIGHTEN SAID SAW CHAIN.