Universal lathe jig

Claim 1

A LATHE SUPPLEMENTING BLOCK-LIKE FIXTURE FOR LOCATING AND CLAMPING A WORKPIECE ON A LATHE WHEN INSTALLED AND LOCATED THEREON BY BEING CLAMPED DOWN IN THE HOLDDOWN ENGAGING SLOT MEANS EXTENDING ACROSS AN UPWARDLY FACING HORIZONTAL SURFACE OF THE LATHE, WHICH SURFACE IS ALWAYS ACCURATELY PARALLEL TO THE AXIS OF ROTATION OF THE LATHE''S TOOL-CARRYING, ROTARY SPINDLE, SAID FIXTURE COMPRISING, A BLOCK-LIKE MAIN BODY PORTION HAVING A FLAT BOTTOM FACE UNOBSTRUCTED BY PROTUBERANCES THROUGHOUT ITS AREA WITH UPRIGHT HOLD-DOWN CLAMP BOLT MEANS EXTENDING DOWNWARDLY THEREFROM AND VERTICALLY THROUGH SAID MAIN BODY PORTION TO BE ENGAGED IN THE LATHE''S ENGAGING SLOT MEANS TO LOCATE SAID BOTTOM FACE ALWAYS ACCURATELY PARALLEL TO THE LATHE''S UPWARDLY FACING SURFACE AND THUS TO THE AXIS OF THE LATHE''S SPINDLE, SAID MAIN BODY PORTION HAVING AN UPRIGHT FLAT FRONT FACE ACCURATELY PERPENDICULAR TO THE LATHE''S UPWARDLY FACING SURFACE AND ALSO UNOBSTRUCTED BY PROTUBERANCES THROUGHOUT ITS AREA AND A SEPARATE, NARROWER FROM FRONT-TO-REAR, UPRIGHT FRONT BODY PORTION HAVING A SUBSTANTIALLY UNOBSTRUCTED UPRIGHT FLAT FRONT FACE AND AN ACCURATELY PARALLEL, UPRIGHT REARMOST FACE UNOBSTRUCTED BY PROTUBERANCES AND VERTICALLY AND SLIDABLY ENGAGING SAID FRONT FACE OF SAID MAIN BODY PORTION AND CONNECTED THERETO BY A PLURALITY OF FINAL ADJUSTMENT-PROVIDING VERTICAL SLIDE GUIDE TRACK MEANS AND MANUAL CLAMP MEANS, SAID FRONT FACE OF SAID MAIN BODY PORTION BEING INTER-