boone

Claim 1

A PEN FOR INSCRIBING LINES ON SURFACES TO INDICATE THE FLIGHT PATH AND SPEED OF VESSELS COMPRISING, A CARRIAGE HAVING, A TRANSVERSELY EXTENDING APERTURE THROUGH APPROXIMATELY THE CENTER THEREOF, ELECTROMAGNETIC MEANS RECESSIVELY CONNECTED TO THE BODY OF SAID CARRIAGE AND DISPOSED IN FLUSH ARRANGEMENT THEREWITH, SUPPORTING MEANS CONNECTED TO SAID CARRIAGE, SAID CARRIAGE BEING SLIDABLE THEREWITH, MARKING MEANS LONGITUDINALLY DISPOSED ANGULARLY WITHIN SAID APERTURE IN A NON-WRITING POSITION, RESERVOIR MARKING MEANS AT ONE END PIVOTEDLY MOUNTED ON THE TOP PORTION OF SAID CARRIAGE BODY ADJACENT ONE EDGE THEREOF AND HAVING THE NON-MARKING END OF SAID MARKING MEANS TERMINATING IN THE LOWER PORTION OF SAID RESERVOIR MEANS THEREBY PROVIDING GRAVITY FEEDING FOR SAID MARKING MEANS, ARMATURE MEANS JUXTAPOSED TO SAID ELECTROMAGNETIC MEANS AND ROTATABLY DISPOSED AT ONE END THEREOF ADJACENT THE OTHER OPPOSITELY POSITIONED CARRIAGE EDGE, LINK MEANS PIVOTEDLY COUPLING THE OTHER END OF SAID ARMATURE MEANS AND THE OTHER END OF SAID RESERVOIR MARKING MEANS, SPRING BIAS MEANS ENCIRCLING SAID MARKING MEANS WHEREBY ENERGIZATION OF SAID ELECTROMAGNETIC MEANS WILL ROTATE THE ARMATURE MEANS AND COUPLED RESERVOIR MEANS AGAINST THE SPRING BIAS MEANS TO THEREBY VERTICALLY POSITION THE PEN MEANS PREPARATORY TO THE MARKING OPERATION.