Abstract: A full rotary loop taker assembly comprising a loop taker (11) rotatably held in a loop taker support (1), and a driver (3) for rotatively driving the loop taker as it is rotated around a rotative axis (4) intersecting the rotative axis (12) of the loop taker. The loop taker is formed on its bottom surface wall (16) with at least three angularly spaced engaging holes (17a, 17b, 17c). The driver is formed with at least three angularly spaced projections (10a, 10b, 10c) adapted to be received in the engaging holes. During the rotation of the driver, the projections are successively received in the corresponding engaging holes in such a manner as to ensure that there is always at least one projection which has been received in the corresponding engaging hole. Further, to allow passage of an upper thread loop (23), in a predetermined angular range in the rotation of the driver the respective projections are ready to escape from the corresponding holes.

Abstract: A slit (7) is formed which lies in a vertical plane and extends from an upper surface of a sewing machine frame (1) to a front surface. A tension device (5), a thread take-up spring (30), and upper and lower thread guides (23, 24) are disposed along the direction in which the slit (7) extends. A thread take-up lever (12) is installed so that it is reciprocated horizontally across the space between the pair of thread guides (23, 25). The placement of the thread in the tension device (5), thread take-up spring (30), and two thread guides (23, 24) can be attained by simply pulling the upper thread vertically downward through the slit (7). When the thread take-up lever is reciprocated, during its forward stroke it arrests the portion of the thread positioned between the two thread guides (23, 24) and draws it in V form. During its return stroke, the thread take-up lever (12) releases the thread to allow the latter to loosen in loop form.

Abstract: The frame of a sewing machine is divided into a rear frame section (1) and a front cover (2). Mounted on seats formed on the rear frame section (1) are such components as an arm shaft unit (4), a loop taker unit (10), a presser and needle bar unit (3) and a bottom arm shaft unit (8). Mounted on the front cover (2) are a bobbin winder (60), operating panels (83, 84), control knob (68), etc. A pattern selecting dial (26), a reverse lever (32), a work feed control dial (87), etc. are held by mechanism components mounted on the rear frame section (1) and are exposed to the outside through openings (61, 62) in the front cover (2).

Abstract: The frame of a sewing machine is divided into a rear frame section (1) and a front cover (2). Mounted on seats formed on the rear frame section (1) are such components as an arm shaft unit (4), a loop taker unit (10), a presser and needle bar unit (3) and a bottom arm shaft unit (8). Mounted on the front cover (2) are a thread tensioning device unit (59), a bobbin winder (60), operating panels (83, 84), control knobs (67, 68), etc. A pattern selecting dial (26), a reverse lever (32), a work feed control dial (87), etc. are held by mechanism components mounted on the rear frame section (1) and are exposed to the outside through openings (61, 62) in the front cover (2).

Abstract: Mechanism in a sewing machine for actuating the feed dog includes a pivoted actuating arm carrying on its distal end a feed dog support which is rockable about a vertical axis and also is slidable vertically. The feed dog support includes an arm which cooperates with an arcuate guideway which controls the attitude of the feed dog support so that the feed dog is maintained in proper work feeding attitude in its horizontal movement. Additional means effect vertical movement of the feed dog support in synchronism with the horizontal movement.

Abstract: A take-up lever and thread guide for a sewing machine includes a first arm portion and an overlying second arm portion forming an open-ended slot communicating with an aperture spaced from the open end. The second arm portion includes a depending detent spaced from the aperture in the direction of the open end and is adapted to prevent a thread from moving outside of the slot during the operation of the take-up lever.