Rotatable loop taker and bobbin case assembly

In a lockstitch sewing machine, a work supporting bed, a loop taker mounted for rotation about a vertical axis in the bed and including a rim with a beak for seizing thread carried by a reciprocating needle, a bobbin case within the loop taker, a bracket affixed in the bed and loosely connected to the bobbin case to constrain the bobbin case rotationally and radially and permit the passage of said thread between the bobbin case and bracket during the formation of the lockstitches on the machine, the bobbin case being vertically supported at one location on the bracket and at another location on the rim of the loop taker, the bobbin case being tilted relative to the loop taker by the bracket to limit the area of contact between the bobbin case and looptaker rim.