end portion 10 of the bracket arm includes a fixed support bracket 14 having an upper extending arm 16 and a lower extending arm 18 which support a needle bar gate 20 a needle bar 22 is supported at 24 and 26 in gate 20 for endwise reciprocation by a rotating arm shaft 28 acting through a counterbalanced crank 30 a connecting drive link 32 and finally a collar 34 which is pivotally connected at screw 35 to the needle bar crank 30 drives one end of the needle bar connecting drive link 32 through an actuating crank pin 36 the needle bar connecting drive link 32 includes a track 38 between an upper wedge 40 and lower ledge 42 and in the track there is carried a slide 44 the slide is connected by a screw 43 to one end of a pin 45 having the needle collar 34 as an integral part thereof at the opposite end a sewing needle 46 is carried by the lower end portion of the needle bar 22 and cooperates with a rotary loop taker hook 47 journalled in the bed portion 12 and driven by means not shown in timed relationship to the arm shaft 28 for concatenating the needle thread not shown for stitch formation a presser foot 48 affixed to a presser bar 50 is utilized to urge fabric into contact with the feeding mechanism not shown in the bed portion 12 of the machine the needle bar 22 extends through an elliptical opening 52 in the arm 18 of the fixed bracket 14 which opening is sufficient size to permit zig zag movements of the needle bar 22 in response to reciprocatory actuation.