Tuner for electric steel guitar

Claim 1

IN A STRINGED INSTRUMENT HAVING AN ELONGATED BODY PROVIDED WITH A PLURALITY OF PARALLEL VIBRATABLE STRINGS UNDER TENSION SECURED AT THEIR HEAD ENDS TO A PLURALITY OF TUNING PEGS AND A THEIR TAIL ENDS TO TENSION VARYING MEANS, SAID TENSION VARYING MEANS INCLUDING A PIVOT SHAFT EXTENDING TRANSVERSELY WITH RESPECT TO SAID STRINGS AND LOCATED BELOW THE PLANE THEREOF, A DOWNWARDLY EXTENDING FINGER PIVOTALLY MOUNTED ON SAID PIVOT SHAFT AND HAVING A SEMICYLINDRICAL UPPER END CONCENTRIC TO SAID PIVOT SHAFT FOR SUPPORTING THE TAIL END PORTION OF A STRING, MEANS FOR SECURING THE TAIL END OF SAID STRING TO SAID FINGER, A DEPENDING PIVOT BAR PIVOTALLY ATTACHED AT ITS UPPER END TO THE LOWER END OF SAID FINGER ABOUT AN AXIS PARALLEL TO SAID PIVOT SHAFT, A PAIR OF VERTICALLY SPACED FULCRUM ABUTMENTS CONTACTING THE TAIL EDGE OF SAID PIVOT BAR, RESILIENT MEANS FOR NORMALLY MAINTAINING SAID PIVOT BAR IN CONTACT WITH SAID VERTICALLY SPACED ABUTMENTS, THE TENSION ON SAID STRING ADDITIONALLY NORMALLY ASSISTING IN MAINTAINING SAID PIVOT BAR IN CONTACT THERWITH BY TENDING TO ROTATE SAID FINGER ABOUT SAID PIVOT SHAFT IN A DIRECTION TO CAUSE THE LOWER END OF SAID FINGER TO MOVE TOWARD THE PLANE OF SAID VERTICALLY SPACED ABUTMENTS, AND SELECTIVELY CONNECTABLE MEANS FOR PULLING THE TOP OF SAID PIVOT BAR AWAY FROM THE UPPER OF SAID VERTICALLY SPACED ABUTMENTS WHILE RETAINING THE BOTTOM OF SAID PIVOT BAR IN CONTACT WITH THE LOWER THEREOF WHEREBY TO OSCILLATE SAID FINGER IN A DIRECTION TO INCREASE THE TENSION ON AND PITCH OF SAID STRING OR FOR PULLING THE BOTTOM OF SAID PIVOT BAR AWAY FROM THE LOWER OF SAID VERTICALLY SPACED ABUTMENTS WHILE RETAINING UPPER PORTION OF SAID PIVOT BAR IN CONTACT WITH THE UPPER THEREOF WHEREBY TO OSCILLATE SAID FINGER IN A DIRECTION TO DECREASE THE TENSION ON AND PITCH OF SAID STRING.