Double pointed looper actuating mechanism for chain stitch sewing machine

In a sewing machine;

• a frame;
• a sewing needle reciprocable in the frame;
• a looper with two loop seizing points;
• camming means affixed to the looper and including two intersecting cam tracks;
• an actuator to slidingly engage the cam tracks alternately and effect motion of the looper alternately placing each of the two loop seizing points in cooperative engagement with the needle for the formation of chain stitches;
• a gate movable with respect to the cam tracks and including a part which extends between the tracks at the intersection thereof, said gate during movement of the actuator in each track being movable by the actuator from a held position wherein the entrance to the track with the actuator therein is open and the entrance to the other track is closed by the extending gate part, to another held position wherein the entrance to the track with the actuator therein is closed by the extending gate part and the entrance to the other track is open, said extending gate part being resiliently movable with respect to another part of the gate to thereby enable the actuator to exit from each track by temporarily moving the said extending gate part from its position closing the entrance thereto.