make it readily recognizable by an operator referring to fig7 and 8 it being remembered that the profile depth decreases from the top to the bottom of the traces excursion a represents the juncture of the bottom of the sleeve valve 17 with the conduit or casing 149 excursion b represents the juncture of the sleeve portion 151 of the sleeve valve 17 with the cylinder portion 153 see fig5 b excursion c represents the enlarged diameter portion 155 of the sleeve portion 151 excursion d represents the cylinder portion 153 that is exposed above or below the sleeve portion 151 when the sleeve valve 17 is fully opened or fully closed the excursion e represents the juncture of the top of the sleeve valve 17 with the conduit or casing 149 if it is assumed that the sleeve valve 17 is closed then the log trace that has just been made will look like that of fig7 when the operator sees that he has made a complete calipering traverse of the sleeve valve 17 that he wishes to manipulate the traversing is stopped by pushing the stop button of the switch set 135 and the lower dog means 33 is closed by moving toggle switch 137 to the close position.