Abstract: A loop taker (18) has a loop taker body (20) molded of resin in one piece, and a hook (22) made of metal. A rotary shaft (13) is fitted in the center of the loop taker (18), and a set screw (17) threadedly inserted in the end of this rotary shaft holds down the loop taker (18). A pin (36) fixedly installed on the rotary shaft (13) is fitted in a radially extending groove (37) in the loop taker (18), whereby the loop taker (18) is connected to the rotary shaft (13) so that it will not rotate relative to the rotary shaft.

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: An overlock machine is designed for easy placement of a thread through a looper. The members which would obstruct access to the looper are mounted on a movable portion of a bed frame. By swinging open the movable portion, the obstructing members are moved to their inoperative position. A fixed knife only, or both the fixed knife and the movable knife are mounted on the movable portion.

Abstract: A loop taker (18) has a loop taker body (20) molded of resin in one piece, and a hook (22) made of metal. A rotary shaft (13) is fitted in the center of the loop taker (18), and a set screw (17) threadedly inserted in the end of this rotary shaft holds down the loop taker (18). A pin (36) fixedly installed on the rotary shaft (13) is fitted in a radially extending groove (37) in the loop taker (18), whereby the loop taker (18) is connected to the rotary shaft (13) so that it will not rotate relative to the rotary shaft.

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: A sewing machine having a underbed hook rotatable in a horizontal plane includes a needle bar tilted at an angle with respect to a vertical line to displace a sewing needle rearward to a retracted position. The retracted needle provides on a bed of the sewing machine a relatively large working surface on which sewing can be effected. The hook is also displaced rearward below the bed for coaction with the needle.

Abstract: An embroidering apparatus for use with a sewing machine has a body supported on a bed and movable back and forth and laterally along guide rails extending perpendicularly to each other. A table and a support frame to which an embroidery frame is attachable are mounted on the body for movement therewith. A fixed tracing needle is oriented to the table on which an original pattern is to be placed. In operation, the table can be manipulated to permit the tracing needle to follow the original pattern on the table while the latter is being moved around.

Abstract: A detection circuit senses whether a buttonhole type presser foot is attached to a sewing machine presser bar and through a control circuit enables or disables pattern selection switches for machine operation other than a buttonholing mode.

Abstract: A control apparatus for a multiple pattern sewing machine. Included in the sewing machine are a means for controlling the displacement of a feed mechanism for feeding a cloth and a means for controlling the displacement of a bight mechanism for swinging a sewing needle in the direction crossing the cloth feeding direction. A plurality of switching devices are provided for selectively coupling to the feed control means a plurality of different amplitude reference signals for controlling the feed mechanism. A plurality of switching devices are provided for selectively coupling to the bight control means a plurality of different amplitude reference signals for controlling the bight mechanism. Counter means, which are responsive to a timing signal generated for each stitch in the pattern, are provided for making a stepping operation for selectively rendering conductive the switching devices of the feed switching means and the bight switching means for each stepping operation.

Abstract: A direct current obtained by rectifying an alternating current voltage by means of a diode bridge circuit is applied to a direct current motor connected to the diode bridge circuit. Use is made of the fact that the voltage developed across the diode bridge circuit varies, depending on the magnitude of the induced voltage across the motor. To that end, the interjunction of a capacitor series circuit coupled to the bridge circuit is connected through a voltage responsive bidirectional switching device, such as a diac, to a control electrode of a voltage controlled bidirectional switching device, such as a triac, for phase control of the alternating current voltage. One electrode of the voltage responsive bidirectional switching device is coupled to a variable resistor provided in a gang fashion with a controller, such as a foot controller pedal, so that the voltage obtainable from the variable resistor is superposed on the voltage in the switching device, such as a diac.

Abstract: A shuttle device provided with a rotating hook comprises a rotatable race secured to a verticle driving shaft. A bobbin carrier is journalled in the race and has a pair of spaced abutment faces on opposite sides of the path of the needle. The abutment faces cooperate with two spaced beaks on an oscillating escapement so that one of the beaks is always in contact with one of the abutment faces to prevent the carrier from rotating. The oscillation of the escapement permits a space to be left alternatively for each pair of cooperating beaks and abutment faces for the passage of the upper thread loop. The escapement is resiliently yieldable to prevent injury to the beaks or abutment faces, in the event of thread jamming between the sliding contact faces of the shuttle race and the bobbin carrier.

Abstract: A presser bar has a presser attachment for holding fabric placed on a machine bed and a shoe is attached to the presser attachment in such a manner as to be slidable in the fabric feed direction. A first slidable variable resistor is fixed to a lateral surface of the shoe, with its slider connected to the presser bar so as to be displaced. A recess is formed in the machine arm or bed at a certain position and a second slidable variable resistor is mounted in the recess, with its slider projecting therethrough. This slider of the second variable resistor is adapted to be displaced, for example, by a button inserted in the recess and confined between the slider and a wall of the recess. The first variable resistor provides a voltage substantially corresponding to the amount of fabric feed, while the second variable resistor provides a voltage corresponding to the button size.

Abstract: A sewing machine driven by a motor which is adapted to be energized by an alternate current power supply and is phase controlled by means of thyristors. In a normal operating mode the conduction phase of the thyristors is made variable as a function of the extent of the depression of a foot controlled pedal, whereas in a low constant speed mode the thyristors are made conductive at a predetermined phase. The motor is coupled to a main shaft which is provided with a magnet located at a predetermined position, while a bracket arm is provided with a reed switch located at a predetermined position, such that if and when the foot controlled pedal is released, the reed switch is actuated to trigger the thyristors for reverse braking of the motor as a function of the counter electromotive force of the motor. Preferably, a timer is provided for interrupting the power supply after the lapse of a predetermined time period after the foot controlled pedal is released.

Abstract: A sewing machine cabinet for use with a free-arm type sewing machine in which the sewing machine is maintained at the same level when used either in a free-arm or flat bed mode of operation. The cabinet includes a hinged sewing machine support panel having a pair of depending brackets arranged to cooperate with rotatably notched dogs mounted on walls of the cabinet. The movement of the brackets influences the positions assumed by the dogs so that, in one position of the dogs, the support panel and sewing machine are secured in operating position and, in another position of the dogs, the support panel and sewing machine may be moved downwardly to storage position within the cabinet.