Correctable dimensional and center marking gauge

Claim 1

A DEVICE OF THE CLASS DESCRIBED COMPRISING AN ELONGATED BODY MEMBER, SAID BODY MEMBER HAVING AN UPPER AND A LOWER CHAMBER OF SUBSTANTIALLY IDENTICAL CROSS SECTION EXTENDING SUBSTANTIALLY THE FULL LENGTH OF SAID BODY MEMBER, A PAIR OF ALIGNED SHOULDER PORTIONS MOUNTED IN EACH OF SAID CHAMBERS, A RACK POSITIONED IN EACH OF SAID CHAMBERS AND SLIDABLY POSITIONED ON SAID PAIR OF SHOULDER PORTIONS, A PINION GEAR ROTATABLY MOUNTED IN SAID ELONGATED BODY MEMBER AT SUBSTANTIALLY ITS MID PORTION IN MESH ENGAGEMENT WITH SAID RACKS FOR UNITARY MOVEMENT OF SAID RACKS, SPRING MEANS YIELDINGLY URGING SAID RACKS INTO MESH ENGAGEMENT WITH SAID PINION GEAR, SAID ELONGATED BODY MEMBER HAVING A PAIR OF SLOTS IN ALIGNMENT WITH EACH OF SAID RACKS, A PAIR OF SUBSTANTIALLY UPRIGHT AND ARCUATE LEG MEMBERS HAVING LOWER PORTIONS TERMINATING IN SUBSTANTIALLY PARALLEL EDGE PORTIONS FOR GUIDING AN INSTRUMENT IN MARKING THE POSITION OF SAID EDGE PORTION, EACH OF SAID LEG MEMBERS HAVING A SLOTTED PORTION AT THEIR UPPER PORTION RECEIVING SAID ELONGATED BODY MEMBER, MEANS EXTENDING THROUGH SAID ALIGNED SLOTS SECURING EACH OF SAID LEG MEMBERS TO ONE OF SAID RACKS, MARKING SUPPORT MEANS ADJUSTABLY MOUNTED ON SAID ELONGATED BODY PORTION AT SAID MIDPORTION FOR RECEIVING A MARKING INSTRUMENT, LOCKING MEANS MOUNTED ON ONE OF SAID LEG MEMBERS FOR ENGAGING SAID ELONGATED BODY MEMBER AND PREVENTING MOVEMENT OF SAID RACKS IN SAID ELONGATED BODY MEMBER, SAID ELONGATED BODY MEMBER HAVING AN OPENING PERMITTING THE VIEWING OF ONE OF SAID RACKS, SAID ONE OF SAID RACKS HAVING A PLURALITY OF GRADUATIONS THEREON, A TRANSPARENT MEMBER HAVING A MARKING THEREON, SAID TRANSPARENT MEMBER HAVING A PAIR OF ELONGATED OPENINGS, AND FASTENING MEMBERS RECEIVED BY SAID ELONGATED OPENINGS ADJUSTABLY SECURING SAID TRANSPARENT MEMBER ON SAID BODY MEMBER, FOR DIMENSIONALLY CORRECTING THE POSITION OF SAID PARALLEL EDGE PORTIONS IN AN APPROXIMATE AMOUNT SUBSTANTIALLY EQUAL TO THE SIZE OF THE MARKING INSTRUMENT BEING USED.

Claim 2

A DEVICE OF THE CLASS DESCRIBED COMPRISING AN ELONGATED BODY MEMBER, SAID BODY MEMBER HAVING AN UPPER AND A LOWER CHAMBER OF SUBSTANTIALLY IDENTICAL CROSS SECTION EXTENDING SUBSTANTIALLY THE FULL LENGTH OF SAID BODY MEMBER, A PAIR OF ALIGNED SHOULDER PORTIONS MOUNTED IN EACH OF SAID CHAMBERS, A RACK POSITIONED IN EACH OF SAID CHAMBERS AND SLIDABLY POSITIONED ON SAID PAIR OF SHOULDER PORTIONS, A PINION GEAR ROTATABLY MOUNTED IN SAID ELONGATED BODY MEMBER AT SUBSTANTIALLY ITS MID PORTION IN MESH ENGAGEMENT WITH SAID RACKS FOR UNITARY MOVEMENT OF SAID RACKS, SPRING MEANS YIELDINGLY URGING SAID RACKS INTO MESH ENGAGEMENT WITH SAID PINION GEAR, SAID ELONGATED BODY MEMBER HAVING A PAIR OF SLOTS IN ALIGNMENT WITH EACH OF SAID RACKS, A PAIR OF SUBSTANTIALLY UPRIGHT AND ARCUATE LEG MEMBERS HAVING LOWER PORTIONS TERMINATING IN SUBSTANTIALLY PARALLEL EDGE PORTIONS FOR GUIDING AN INSTRUMENT IN MARKING THE POSITION OF SAID EDGE PORTION, EACH OF SAID LEG MEMBERS HAVING A SLOTTED PORTION AT THEIR UPPER PORTION RECEIVING SAID ELONGATED BODY MEMBER, MEANS EXTENDING THROUGH SAID ALIGNED SLOTS SECURING EACH OF SAID LEG MEMBERS TO ONE OF SAID RACKS, MARKING SUPPORT MEANS ADJUSTABLY MOUNTED ON SAID ELONGATED BODY PORTION AT SAID MIDPORTION FOR RECEIVING A MARKING INSTRUMENT, LOCKING MEANS MOUNTED ON ONE OF SAID LEG MEMBERS FOR ENGAGING SAID ELONGATED BODY MEMBER AND PREVENTING MOVEMENT OF SAID RACKS IN SAID ELONGATED BODY MEMBER, SAID ELONGATED BODY MEMBER HAVING AN OPENING PERMITTING THE VIEWING OF ONE OF SAID RACKS, SAID ONE OF SAID RACKS HAVING A PLURALITY OF GRADUATIONS THEREON, A TRANSPARENT MEMBER HAVING A MARKING THEREON, SAID TRANSPARENT MEMBER HAVING A PAIR OF ELONGATED OPENINGS, AND FASTENING MEMBERS RECEIVED BY SAID ELONGATED OPENINGS ADJUSTABLY SECURING SAID TRANSPARENT MEMBER ON SAID BODY MEMBER, FOR DIMENSIONALLY CORRECTING THE POSITION OF SAID PARALLEL EDGE PORTIONS IN AN APPROXIMATE AMOUNT SUBSTANTIALLY EQUAL TO THE SIZE OF THE MARKING INSTRUMENT BEING USED.