Abstract: The rotary vessel is structured having a function movable generally vertical relative to a plane of a wristwatch case, and divided with a plurality of stop points in a movable range in a vertical direction, i.e. a stop point for securing stop stability of rotation and a stop point for rotating the rotary vessel. Due to this, in the case that the rotary vessel is in a rotatable state, rotation torque can be minimized.

Abstract: The rotary vessel is structured having a function movable generally vertical relative to a plane of a wristwatch case, and divided with a plurality of stop points in a movable range in a vertical direction, i.e. a stop point for securing stop stability of rotation and a stop point for rotating the rotary vessel. Due to this, in the case that the rotary vessel is in a rotatable state, rotation torque can be minimized.

Abstract: A method for automatically stitching by a zigzag sewing machine a button hole, which includes two line-tack stitching parts stitched sequentially, comprises applying a predetermined amount of fabric feeding to a first group of alternate stitches in both line-tack stitching parts, and then applying no fabric feeding to a second group of alternate stitches in the line-tack stitching parts by not moving the fabric relative to the needle in any direction. Inclined stitches and non-inclined stitches which alternate with each other result in each line-tack stitching part.

Abstract: In an electronic pattern stitch sewing machine, lock stitches are produced prior to the initial and final stitch of a selected pattern without deforming the patterns. In this machine, under single setting operation conditions the setting of desired sewing parameters is made automatically for a basting operation.

Abstract: In electronic pattern stitch sewing machine lock stitches are produced prior to the initial and final stitch of a selected pattern without deforming the patterns. In this machine, under single setting operation conditions the setting of desired sewing parameters is made automatically for a basting operation.

Abstract: The needle-shifting zig-zag unit and the work feeding unit are moved to different positions, when necessary, for successive stitches, to form a stitching pattern. Each unit is powered by the main rotating drive shaft of the sewing machine. However, each unit is provided with a respective stepper motor. Each stepper motor changes the setting of an adjuster in a reciprocating-motion generator driven by the main drive shaft. When one of these adjusters is in a constant setting, its respective reciprocating-motion generator continually generates reciprocating motion of constant corresponding amplitude, for an unlimited time, so long as the drive shaft rotates. The needle-penetration coordinates for the stitching pattern are established by continually changing the amplitude of the reciprocations performed by the two reciprocating-motion generators.

Abstract: A first memory stores stitch control signals. A second memory stores these signals temporarily and reads them out to enable stitches to be formed. As a pattern is stitched, the first memory is readdressed and stitch control signals are successively written into and read out of the second memory. In one embodiment, the second memory is a RAM--in a second embodiment, the second memory is a shift register. Monostable multivibrators are used to operate the memories.

Abstract: A pulse motor rotation phase adjusting system for a sewing machine includes a pulse motor operative for positioning a needle of the sewing machine in accordance with the predetermined stitch coordinates of a selected pattern. The pulse motor is adapted to be set to one of the stepping rotation phases in dependence upon the predetermined combinations of the magnetic forces generated by the windings of the pulse motor. A light interrupting arrangement is provided in the system which is connected to the output shaft of the pulse motor and serves for detecting the respective rotation phases of the pulse motor within a range of the maximum needle swinging amplitude and to produce a signal corresponding to predetermined combination of the magnetic forces, which signal is read out by a control circuit operatively connected to the pulse motor to rotate and reset the same to its initial position in accordance with said predetermined stitch coordinates when the electric power is applied to the sewing machine.

Abstract: The electronic patterning system of a sewing machine comprises a main pattern memory consisting of a large number of individually addressable storage locations. Instead of each storage location storing only the stitch-control data for one stitch of one pattern, one section of each of at least some of the storage locations stores stitch-control data pertaining to one stitch of one pattern but with another section of the same storage location storing stitch-control data pertaining to a different stitch, e.g., a stitch of a completely different pattern. Thus, it may be that for some stored patterns one section of each storage location used for a pattern stores needle-bar position commands with the other section of each such storage location storing cloth-feed commands.

Abstract: The stitch-control-signal outputs of a first memory are connected to the inputs of stitch-forming instrumentalities via an intermediate second memory. One of the two memories is a static memory which is read out by applying to the address signal inputs thereof a series of next-address signals derived from the signals produced at the output of that memory. Both memories may be static memories whose read-out is performed in that way. Alternatively, the intermediate memory may be a sequential-access dynamic memory, such as a shift register, whose read-out is effected by a train of indistinguishable shift signals.