Center of gravity locating device

Claim 1

A CENTER OF GRAVITY LOCATING DEVICE COMPRISING A HORIZONTALLY DISPOSED BALANCE PLATFORM, SAID PLATFORM HAVING A PAIR OF ELONGATED SLOTS FORMED IN ADJACENT PERPENDICULAR SIDE EDGES THEREOF, A PAIR OF COUNTERWEIGHTS, EACH OF SAID COUNTERWEIGHTS BEING MOVABLY MOUNTED ADJACENT SAID PLATFORM SIDE EDGES AND HAVING A PORTION THEREOF RECEIVED WITHIN ONE OF SAID SLOTS SO AS TO BE GUIDED THEREBY, MEANS FOR MOVING EACH OF SAID COUNTERWEIGHTS IN A VERTICAL PLANE PARALLEL TO ITS RESPECTIVE PLATFORM EDGE, SAID MEANS INCLUDING A PAIR OF MOTORS AND A THREADED SHAFT OPERABLY CONNECTING A RESPECTIVE MOTOR WITH A RESPECTIVE COUNTERWEIGHT, PIVOT MEANS CONTACTING THE UNDERSIDE OF SAID PLATFORM AT THE NORMAL CENTER OF GRAVITY THEREOF AND FORMING THE SOLE PIVOTAL MOUNTING MEANS FOR SAID PLATFORM, AND VISUAL ALIGNING MEANS INCLUDING A PAIR OF VERTICALLY EXTENDING SIGHT BARS ATTACHED TO PERPENDICULAR EDGES OF SAID PLATFORM, SAID SIGHT BARS BEING LOCATED ON SAID EDGES IN SUCH A MANNER THAT A STRAIGHT LING FORMED BETWEEN THE POINT OF CONTACT OF EITHER OF SAID SIGHT BARS WITH SAID PLATFORM AND THE CENTER OF GRAVITY OF SAID VALANCE PLATFORM WILL BE PARALLEL TO THE LINE ALONG WHICH ONE OF SAID COUNTERWEIGHTS MOVE AND PERPENDICULAR TO THE LINE ALONG WHICH THE OTHER COUNTERWEIGHT MOVES, SAID VISUAL ALIGNING MEANS FURTHER INCLUDING A PAIR OF FIXED SCOPES, EACH OF SAID SCOPES BEING ARRANGED SUCH THAT A LINE PASSING THROUGH THE CENTER OF GRAVITY OF SAID BALANCE PLATFORM AND SAID SCOPES WILL BE PARALLEL WITH ONE OR THE OTHER OF SAID PATHS OF MOVEMENT OF SAID COUNTERWEIGHTS.