Pipe joint marking tool

Claim 1

A PIPE JOINT MARKING TOOL COMPRISING A BASE, MEANS ON SAID BASE FOR RELEASABLY ATTACHING THE BASE TO THE OUTER SURFACE OF A PIPE, A SUPPORT BAR PROJECTING LONGITUDINALLY FROM SAID BASE AND ARRANGED FOR DISPOSITION SUBSTANTIALLY PARALLEL TO THE PIPE, A MOUNTING BRACKET ON ONE END OF SAID SUPPORT BAR, A GUIDE BAR SLIDABLY MOUNTED AXIALLY IN SAID MOUNTING BRACKET AND SUPPORTED IN ANGULAR RELATION RELATIVE TO SAID SUPPORT BAR, RELEASABLE ATTACHMENT MEANS INTERCONNECTED BETWEEN SAID MOUNTING BRACKET AND SAID GUIDE BAR FOR SECURING THE LATTER IN A SELECTED AXIAL POSITION OF ADJUSTMENT IN SAID MOUNTING BRACKET, AN ARM SLIDABLY AND ROTATABLY MOUNTED AT ONE OF ITS ENDS ON SAID GUIDE BAR AND HAVING AN OUTERMOST END PORTION, SAID ARM HAVING AN OUTWARDLY BOWED CONFIGURATION, A MARKING HEAD FREELY ROTATABLY SUPPORTED ON THE OUTERMOST END PORTION OF SAID ARM ON AN AXIS ALONG THE LONGITUDINAL AXIS OF SAID OUTERMOST END PORTION, SAID MARKING HEAD HAVING A LONGITUDINALLY BOWED CONFIGURATION, AND MARKING MEANS DISPOSED ON A LINE FORMING A CONTINUATION OF THE AXIS OF ROTATION OF THE MARKER HEAD ON SAID ARM WHEREBY SAID END TIP END WILL MARK ON A POINT ALIGNED WITH THE AXIS OF SAID ARM REGARDLESS OF THE ROTATED POSITIONING OF SAID MARKING HEAD ON SAID ARM.