Control means for the backing fabric feed in a pile tufting machine

Claim 1

IN A PILE FABRIC TUFTING MACHINE HAVING A HOUSING, A VERTICALLY RECIPROCATING NEEDLE BAR MOUNTED IN SAID HOUSING, A THROAT DEFINING A TUFTING ZONE OVER WHICH A BACKING FABRIC IS FED UNDERNEATH THE NEEDLE BAR, A PIN FEED ROLL FOR THE BACKING FABRIC, A PIN TAKE-UP ROLL FOR THE BACKING FABRIC, A SHAFT JOURNALED ON THE TUFTING MACHINE AT RIGHT ANGLES TO THE SAID ROLLS, A PAIR OF CRANKS ON SAID SHAFT, A CONNECTING ROD BETWEEN ONE OF SAID CRANKS AND THE PIN FEED ROLL, A CONNECTING ROD BETWEEN THE OTHER OF SAID CRANKS AND THE PIN TAKE-UP ROLL, DRIVE MEANS FOR THE SHAFT, A SECONDARY SHAFT IN SAID DRIVE MEANS, A HIGH SPEED CLUTCH ON SAID SECONDARY SHAFT, A LOW SPEED CLUTCH ON SAID SECONDARY SHAFT, AND PATTERN MEANS FOR SELECTIVELY ACTUATING EACH OF SAID CLUTCHES IN ACCORDANCE WITH A PRE-DETERMINED PATTERN TO INTERMINGLE A FAST LATERAL OSCILLATION OF THE BACKING FABRIC ACROSS THE THROAT, A SLOW LATERAL OSCILLATION OF THE BACKING FABRIC ACROSS THE THROAT, AND A STRAIGHT TRAVEL OF BACKING FABRIC ACROSS THE THROAT.