Abstract: Modern sewing machines comprise an automatic control of cloth feeding in a form of a guide mechanism or a link mechanism. This invention solves the problem of the several points of play in the guide and link mechanisms by substituting a linear driving motor (12) for these mechanisms, which motor drives the feeder directly in a linear movement without intervening mechanical transmission. The number of parts has been essentially reduced by this solution. The vertical movement of the feeder is brought about by a curve disc (22) driven by the sewing machine motor or by a separate motor for the vertical movement. The longitudinal and the vertical movements are synchronized to the other functions in other units of the sewing machine in an electrical or combined electronical/mechanical way.

Abstract: The invention makes it possible to rotate an arm shaft of a sewing machine without a mechanical clutch between the hand wheel and the arm shaft. The position of the hand wheel which previously was very dependent on the mechanical system, can now be chosen so that the best possible ergonometry is obtained. Output of an electronic sensor of the rotation of the hand wheel and another sensor of the movement of the arm shaft are compared in an electronic unit, and as long as there is a difference in the outputs of the sensors the electronic unit will cause driving of the sewing machine motor so that the difference will be zero. The movement of the hand wheel is thus repeated on the arm shaft.

Abstract: In a speed control arrangement for a sewing machine, a control is provided for setting a comfortable cloth feeding speed, and the speed control arrangement controls the speed of the sewing machine motor directly as a function of the set cloth feed and inversely as a function of the seam length.

Abstract: The feeding length in a sewing machine depends on the difference between the positions of the feeder when it rises above the stitch plate and when it sinks again. In previous devices the feeder is controlled by the angular position of a guide which is kept constant during the feeding phase. According to the invention the angular position of the guide can be re-adjusted during the feeding movement. At the moment when the feeder rises above the stitch plate the angular position determines a portion of the feeding length, while the angular position at the moment when the feeder sinks again determines the rest of the feeding length.

Abstract: A seam indicating arrangement in an electronic sewing machine displays all the seams that can be sewn. The seam illustrations are displayed on an electronic display where several groups of seam illustrations can become visible by means of electric signals. Thus, the arrangement shows the seam illustrate as well as a marker and is connected to a seam selecting arrangement by which the groups can be presented one by one and the marker moved between several illustrations.

Abstract: A thread take-up lever in a sewing machine in which the driving cam disc of the take-up lever is mounted on the crankshaft driving the needle bar up and down. The driving cam disc is supported on one side while the spacing on the other side can be optimally utilized. This enables a correct position of the thread take-up movement.

Abstract: An electronic sewing machine has an input selector for the adjustment of input data to the machine. As a complement to the pattern selecting buttons, a cloth meter is provided and positioned at or on the machine. The button and meter provide data of a specific seam selection to the electronic systems on the machine. The cloth meter is used for making a selection of a seam from a series of seams which can be selected by the buttons. When the operator pushes a button, signals are composed to a seam selection code which is fed to a start address memory.

Abstract: A signal arrangement for supplying a signal as a prewarning to the operator of a sewing machine, when the bobbin thread is about to run out. The bobbin has a reflective center, and a radiation source and detectors are mounted in the loop-taker. A friction clutch may be provided between the bobbin and the loop-taker, so that the bobbin rotates in one direction when thread is wound thereon, and the other direction when all of the thread has unwound therefrom.

Abstract: A driving control device for an electronic sewing machine has a computer and an automatic needle stop system. The needle stopping arrangement is responsive to operation of the foot control regulator, and is arranged to stop the needle in its upper position in response to a first raising of the regulator, and is responsive to a second raising of the regulator within a half cycle of the machine operation for stopping the needle at its lowermost position.

Abstract: A rotating sewing machine hook (1) with a horizontal shaft in which the axis of the under thread bobbin (15) forms an angle (a>0) to the hook shaft in a horizontal plan, whereby the width of the bobbin can be increased without the use of thread guide plates, because the inclination of the bobbin in the bobbin holder (6) facilitate the passage of the upper thread around the bobbin holder.

Abstract: The cloth feeder of a sewing machine is formed of an elongated plate having rows of teeth extending parallel to the direction of feeding movement of the cloth feeder. The cloth feeder and stitcher plate have slot-and-pin guides arranged to guide the feeder for movement in the feeding direction.

Abstract: A feeding module in the base on an electronic mechanical sewing machine is driven by an input shaft having two cam surfaces, one of which is arranged to drive a guide element in an oscillating movement. A block journalled on a shaft secured to a slide is displaceable in the guide by a mechanical or computer controlled electrical setting device. The slide is journalled in the feeder and displaceable perpendicularly to the working surface of the feeder. Upon a displacement of the slide the block will move into a corresponding position in the guide thereby effecting an adjustment of the feeding. The other cam surface is arranged to act upon a link connected to the transferring device to the feeder and is coordinated with the cam surfaces to guide the feeder in rectangular movements.

Abstract: An electronic sewing machine for performing fancy seams, such as button holes, is provided with a memory and data circuits for the control of the stitch forming instrumentalities and has a common control for an individual length adjustment of two portions similar to one another of the fancy seam. The control actuates two programmable memories for stitch lengths in such a way that during sewing a first portion the control is connected to a first one of these memories for storing of data, and during sewing the second portion to the second memory. As the storing of data remains until new data is introduced, one and the same fancy seam can be repeated in conformable performance for an unlimited number of times.

Abstract: An electronic sewing machine with a computer (10) for the sewing of a selected fancy seam has electronic circuits to bring about a breaking of a control circuit of the motor (11) of the machine, when the selected seam is completed, and further to detect the "O"-position of a motor control (16) and in this position to re-engage the control circuit and initiate starting codes in the computer for repetition of the selected fancy seam, when the motor is restarted.

Abstract: A seam pattern sewing machine has a plurality of seam pattern selecting switches, and a separate indicator associated with each of the switches. Operation of the switches causes the generation of a seam selection code or start address code, in accordance with the selected switch, for application to a selection address memory. A second selector has a plurality of positions corresponding to characteristics of the material to be sewn. An encoding device is coupled to the second selector for energizing the indicators associated with those seam pattern selector switches corresponding to seams that may be sewn on the selected material.

Abstract: An input selector for a fancy seam sewing machine is provided with pattern selection means and an electronic seam memory for supplying stitch data to needle positioning and feeder mechanisms has, within the pattern selection means, at least one switch controlling the adjustment to a selected series of seams, e.g. utility seams, and a group of multi-pole contacts related to these seams. The contacts apply binary signals to the electronics of the machine and, in an illustrated embodiment with six double-pole contacts, a "two of four code" is achieved. This reduces the number wires required as compared with a system using single-pole switches.

Abstract: A programmable sewing machine has a stitch memory connected to control the needle and/or the cloth feeder. The stitch memory is addressed by an address counter, which is stepped in response to operation of the machine. The address counter is reversible, and the direction of counting therein and the preseting of an address therein is derived from a seam instruction memory responsive to a pattern selection device.