Abstract: A machine body of -shape as viewed in front is formed of a bed, an arm frame laterally disposed above the bed, and an upright support uprightly extended from the bed and supporting one end of the arm frame at an upper end thereof. An upper mechanism of a locking stitching sewing mechanism is disposed in the free end of the arm frame and a lower mechanism of the lockstitching sewing mechanism is disposed below the upper mechanism within the bed so that cloth may be subjected to lockstitching by these mechanisms. An overedge stitching mechanism is provided in a recess within the -shaped body in order to apply overedge to the edge of the cloth.

Abstract: Disclosed is an improved upper thread take-up lever for a two-thread sewing machine. The improvement comprises at least one vertically disposed pulley rotatably supported adjacent to the free end of the lever and a member secured to the free end of the lever for supporting the pulley rotatably in unison with another vertically disposed pulley in the vicinity of a tension disc.

Abstract: The disclosure is directed to a plug receptacle including a ball member having a spherical outer peripheral surface. The ball member is rotatably supported on a bearing surface formed at an open end of a socket member. A connecting member maintains the ball member in contact with the socket member when the device is in normal use. The ball member has openings adapted to receive contact pins of a plug. The ball member is rotatable in any direction with the movement of the plug received in the openings.