Sliding calipers provided with dial gauge

Claim 1

IN SLIDING CALIPERS OF THE TYPE COMPRISING A HOLLOW BODY, A DIAL GAUGE CARRIED ON SAID BODY, GEAR MEANS WITHIN SAID BODY FOR CONTROLLING SAID GAUGE, A STATIONARY FIRST JAW CARRIED BY SAID BODY, A SECOND JAW OUTSIDE SAID BODY MOVABLE WITH RESPECT TO SAID FIRST JAW, ROD MEANS CONNECTED TO SAID MOVABLE JAW WHICH EXTENDS INTO SAID BODY, MEANS ON SAID ROD TO TURN SAID GEARS, A STOP ON SAID ROD OUTWARDLY OF SAID TURNING MEANS, SAID BODY BEING PROVIDED WITH AN APERTURE THROUGH WHICH SAID ROD EXTENDS, THE IMPROVEMENT WHICH COMPRISES A TUBULAR COVER ENCIRCLING SAID ROD AND EXTENDING THROUGH SAID APERTURE, SAID COVER HAVING ONE END FORMED TO CATCH ON SAID STOP ON SAID ROD WHILE ITS OTHER END IS FORMED TO CATCH ON THE INNER EDGE OF SAID APERTURE, SAID COVER COMPRISING AT LEAST TWO RELATIVELY TELESCOPIC TUBULAR PORTIONS, THE INNERMOST OF WHICH CATCHES ON SAID STOP, WHILE THE OUTERMOST CATCHES ON SAID APERTURE, SAID PORTIONS BEING OF SUFFICIENT LENGTH TO RETAIN A TELESCOPIC RELATIONSHIP WHEN THE JAWS ARE IN A FULLY OPEN POSITION.