Patent ID: 6904854

Claim:
A transverse longitudinal-cylinder sewing machine, comprising: an automatic thread loosening device; a tension adjustment mechanism; an automatic thread cutting bi-directional solenoid device; and a differential fabric driving teeth displacement control device which includes; a primary transmission mechanism including a co-axle which is assembled in this order: a first crank, a second crank and a third crank, a seventh crank being coupled with a first axle sleeve of a first bearing, said first axle sleeve being fastened to one end of said co-axle, said third crank being coupled on one end of a second axle sleeve of a second bearing, then coupled to one side of said seventh crank spaced by a washer, said second axle sleeve having another end coupling with a third bearing which is coupled with said second crank from outside, said second crank having another side corresponding to said second axle sleeve to couple with an anchor assembly to allow said co-axle to couple with a lower arched wire mechanism; said co-axle, having another end corresponding to said seventh crank fastened to a third axle sleeve which is coupled with a fourth bearing and a washer ring, said third axle sleeve being coupled with a fourth crank which has a slot formed at one end to couple with a first shaft to pivotally engage with two linking arms to connect said first push mechanism and said first adjustment mechanism; a first and a second push mechanisms driven by said primary transmission mechanism for swinging reciprocally; a first and a second adjustment mechanisms connecting to said first and said second push mechanisms; a rocking mechanism driven by said primary transmission mechanism; and a first and a second fabric driving mechanisms driven by said first and said second push mechanisms for reciprocal and horizontal movement, driven by said rocking mechanism for swinging up and down thereby to move oscillate along an ellipsoidal track; wherein said first and said second fabric driving mechanisms are normal to other mechanisms and form chained movements therewith to control an operation displacement between said first and said second fabric driving mechanisms, thereby to facilitate fabric movement and adjust to deviations of said first and said second push mechanisms through said first and said second adjustment mechanisms to control the relative operating displacements therebetween.