Tachometer attachment for clamp-on type electric meter

Claim 1

IN COMBINATION; AN AC-DC VOLT-OHM-AMMETER AND A CLAMP-ON TYPE SPLIT TRANSFORMER YOKE HAVING A COIL WOUND THEREON AND A TACHOMETER ATTACHMENT COMPRISING; A HOUSING HAVING SPACED PARALLEL SAID SIDE WALLS AND SPACER MEMBERS POSITIONED BETWEEN SAID SIDE WALLS IN SPACED SECURED THERETO A MAINTAIN SAID SIDE WALLS IN SPACED RELATION, MAGNETIC ROTOR MEANS ROTATABLY MOUNTED IN SAID SIDE WALLS AND POSITIONED BETWEEN SAID SPACER MEMBERS TO ROTATE THEREBETWEEN, SAID MAGNETIC ROTOR MEANS HAVING AT LEAST TWO MAGNETIC POLES THEREON, SHAFT MEANS CONNECTED WITH SAID ROTOR MEANS AND EXTENDING FROM SAID HOUSING FOR COUPLING SAID ROTOR MEANS TO A ROTATING BODY WHOSE ROTATIONAL SPEED IS TO BE MEASURED, SAID HOUSING HAVING AN OPEN END TO RECEIVE THE SAID SPLIT TRANSFORMER YOKE TO ENABLE THE JAWS THEREOF TO BE POSITIONED ADJACENT TO THE SAID SPACER MEMBERS TO BE INFLUENCED BY THE ROTATION OF SAID ROTOR MEANS, THE COIL ON SAID CLAMP-ON TYPE TRANSFORMER YOKE HAVING FIRST AND SECOND OUTPUT LEADS, SAID AC-DC VOLT-OHM-AMMETER AND SAID CLAMP-ON TYPE TRANSFORMER YOKE HAVING MEANS THEREON TO DETACHABLY SECURE THEM TOGETHER, SAID AC-DC VOLT-OHM-AMMETER HAVING A CASE AND AN ELECTRICAL COMMON RECEPTACLE THEREIN, SAID CLAMP-ON TYPE TRANSFORMER YOKE HAVING A CASE AND AN ELECTRODE EXTENDING THEREFROM WHICH IS CONNECTED TO SAID FIRST OUTPUT LEAD AND WHICH ELECTRODE IS INSERTED IN SAID RECEPTACLE, SAID RECEPTACLE AND SAID SECOND OUTPUT LEAD BEING CONNECTED TO TERMINALS OF SAID AC-DC VOLTOHM-AMMETER TO READ AC VOLTS FOR INDICATING ROTATIONAL SPEED OF SAID ROTATING BODY.