PALETTE D'AIGUILLAGE RAPPELEE PAR RESSORT POUR MACHINE A COUDRE A POINT DE CHAINETTE

CETTE MACHINE A COUDRE EST MUNIE D'UNE CAME 28 POSSEDANT UNE PAIRE DE RAINURES DE CAME 52, 54 QUI SE COUPENT, UN PRENEUR DE BOUCLE 16 A DEUX POINTES 17, 19 QUI EST PORTE PAR LA CAME, ET UN MECANISME SERVANT A COMMANDER LE MOUVEMENT DU PRENEUR DE BOUCLE ET QUI COMPREND UN ACTIONNEUR 26 DESTINE A ATTAQUER LES RAINURES DE CAME, ET UNE PALETTE D'AIGUILLAGE 58 MONTEE COULISSANTE ET PIVOTANTE ET SOLLICITEE PAR UN RESSORT 66 POUR COMMANDER LE MOUVEMENT DE L'ACTIONNEUR 26 EN LE DIRIGEANT VERS L'UNE OU L'AUTRE DES DEUX RAINURES 52, 54 DE LA CAME. A sewing machine is provided with a cam (28) having a pair of intersecting cam tracks (52,54), a double pointed looper (16) which is carried by the cam, and mechanism for oscillating the looper including an actuator (26) to engage the cam tracks, and a spring biased slidable and pivotably movable gate (58) for controlling movement of the actuator between the tracks. The gate (58) has wings (74, 76) engageable by actuator (26) as it rises in the respective tracks (54,52) for displacing the gate to block the track, under the force of spring (66), below the actuator. The actuator then temporarily displaces the gate against the spring bias as it descends the track and the gate returns to prevent re-entry by the actuator when it rises again.