Abstract: In a self-stringing yarn texturing air jet which is compact and easy to string up includes a body, a yarn inlet section, a movable venturi and a yarn guiding element through which yarn passes to the outlet end of the jet, a second flange on the yarn guiding element located upstream of a flange with an orifice improves texturing efficiency of the jet.

Abstract: A self-stringing jet device which is compact and easy to string up includes a body, a yarn inlet section, and a movable venturi and a cylindrical baffle located at the outlet end of the jet. The venturi may be moved from a string up position to an operating position by engaging the movable venturi located within the jet with a rotatable cam surface actuated by an external handle that can be rotated between stops, one of which is a rotatable eccentric for adjusting the operating position of the jet.

Abstract: An automatic sewing machine comprising, a sewing needle, a work holder for moving a work piece relative the needle, and memory means having a plurality of randomly addressable storage locations for retaining data words. The sewing machine has address means for sequentially selecting the storage locations, and means responsive to the data words of the selected storage locations for moving the work holder and performing a sewing operation.

Abstract: An automatic sewing machine comprising, a sewing needle, a work holder for moving a work piece relative the needle, and memory means having a plurality of randomly addressable storage locations for retaining the data words. The sewing machine has address means for sequentially selecting the storage locations, and means responsive to the data words of the selected storage locations for moving the work holder and performing a sewing operation.

Abstract: The disclosed invention describes an automatic sewing machine which uses a randomly addressable storage element to store a sequence of instructions. The instructions describe a pattern through which a work holder securing a work piece is moved. Electrical circuitry reads the instructions stored in the storage element in a predetermined sequence and provides electrical signals dependent upon the sequence of instructions. A pair of stepping motors respond to the electrical signals to move the work holder. The electrical signals to the stepping motors are aperiodic in order to increase the machine cycle rate and to reduce the tendency of the stepping motors to oscillate. A closed loop actuatable homing device moves the work holder to a predetermined "home" position prior to reading any of the sequence of instructions. Thereafter the work holder is moved according to the sequence of instructions in an open loop mode. Limit circuitry prevents the work holder from being moved beyond predetermined limits.

Abstract: The disclosed invention describes an automatic sewing machine which uses a randomly addressable storage element to store a sequence of instructions. The instructions describe a pattern through which a work holder securing a work piece is moved. Electrical circuitry reads the instructions stored in the storage element in a predetermined sequence and provides electrical signals dependent upon the sequence of instructions. A pair of stepping motors respond to the electrical signals to move the work holder. The electrical signals to the stepping motors are aperiodic in order to increase the machine cycle rate and to reduce the tendency of the stepping motors to oscillate. A closed loop actuatable homing device moves the work holder to a predetermined "home" position prior to reading any of the sequence of instructions. Thereafter the work holder is moved according to the sequence of instructions in an open loop mode. Limit circuitry prevents the work holder from being moved beyond predetermined limits.