Abstract: In an electronic sewing machine, a pattern data memory has memory locations which are accessed in such a manner that address signals are prepared at random. These random address signals are used as stitch data to produce a specific version of a selected pattern.

Abstract: An electronic sewing machine has a memory storing stitch control data for a number of different patterns which may be selected by designation of pattern numbers each specific to the patterns, a second memory for temporarily storing the pattern numbers as they are selected, and a display for electrically indicating the selected pattern numbers in the order as they have been stored in the second memory, maintaining a precededly displayed pattern number until the subsequent one is selected, wherein the ten-keys may be selectively operated to select any of the patterns stored in the first memory, the ten-keys indicating at least two specific ten-keys to be operated to provide at least two different two-figure numbers for changing the function of at least two function keys originally having specific functions respectively into the function for confirming at the display the selected pattern numbers in series in the order and the reverse order as they have been selected respectively, and a signal discriminating circ

Abstract: A front-loading record player comprises a slide base carrying thereon a turntable and movable back and forth with respect to a player cabinet; a driving cam including a front slant retainer section and a rear linear section, the linear section extending in parallel with the moving direction of said slide base and the driving cam being provided on said slide base; a guide cam including a front recess portion and a rear linear portion, the linear portion extending in parallel with the moving direction of the slide base and the guide cam being provided on the player cabinet; and a front door opening/closing drive member for opening and closing a front door of the player cabinet, the drive member being held between the driving cam and the guide cam. The front door opening/closing drive member and the front door are drivingly coupled to each other.

Abstract: In an electronically controlled sewing machine having a memory storing a plurality of stitch patterns among which a desired one or combination may be selectively read out therefrom to produce the same, it is detected if a pattern designated to be followed by a lock stitch pattern and memorized accordingly in the memory is of a first type which includes the last stitch to be produced by initial data stored in the memory for producing the initial stitch of the pattern, or of a second type which includes the last stitch to be produced by the last data stored in the memory for producing the last stitch of the pattern, and according to the result of the detection, the sewing machine is operated to continuously produce the lock stitch pattern after the initial data has been issued from the memory for producing the pattern of the first type or after the last data has been issued from the memory for producing the pattern of the second type.

Abstract: A stitch pattern sewing machine utilizes a microcomputer which operates in a stitch control mode and in a malfunction diagnosing mode. Each mode is selectively rendered effective by a changeover switch. The diagnosis of malfunction includes a series of checking steps carried out in a predetermined order. Indication means are selectively illuminated to operate in either one of the two modes in dependence upon the position of the changeover switch.

Abstract: A sewing machine has a rotatable shaft for operating a stitch forming device, and includes a feed dog for feeding fabric to be sewn, and a needle for forming stitches in the fabric.

Abstract: A driving system for a pulse motor, particularly of a sewing machine, includes an electronic memory for determining the time series of drive pulses to control the speed of the pulse motor according to a number of moving steps. The system is provided with a number of calculating devices operated in accordance with calculating formulas reflecting the functions of the number of stepping pulses to control the stepping speed of the pulse motor in accordance with the number of steps needed by the pulse motor to move a given distance.

Abstract: A plurality of different stitch patterns are stored in a first static memory. A second static memory memorizes a combination of these different patterns in a predetermined sequence. A third static memory stores basic needle position signals each specific to the patterns stored in the first memory. Calculating means utilize signals derived from the second memory and the third memory to determine values for adjusting the swinging amplitude of the sewing needle with a common variation rate and for setting a common basic needle position.

Abstract: This invention relates to an electronic sewing machine with which stitch patterns can be formed according to stitch control signals stored in electronic memory means, and more particularly to stitch pattern control means for such an electronic sewing machine.

Abstract: The speed control circuit comprises a full wave rectifier having its output connected to an adjustable D.C. voltage divider. A series circuit connected to an A.C. power source includes an electric motor and an anti-parallel connection of two thyristors. The gates of the thyristors are connected to the output of the voltage divider via separate trigger circuits each providing a different trigger voltage proportional to the setting of the voltage divider. In this manner one or both thyristors may be selectively activated and the electric motor can be driven with half the waves as well as with full waves of the power source.