Tokyo Juki Industrial Co., Ltd.

Thk Co., Ltd.

Kunio Takano

Masanori Nukushina

Tomoaki Kinoshita

Osamu Tachikawa

Yoichi Okiyama

Hiroshi Tokunaga

Minoru Wada

Toshiyuki Miyamoto

Kotaro Kawai

Masanori Yoshino

Harutaka Tsuiki

The rolling element screw device includes: a screw shaft having a rolling element raceway groove; a nut member, which has a loaded rolling element raceway groove opposed to the rolling element raceway groove and is threadingly engaged with the screw shaft through intermediation of the rolling elements; and the circulation component, which includes a pair of the first circulating portions passing through a peripheral wall of the nut member, and the second circulating portion coupling the pair of first circulating portions together, to thereby form the endless circulation path for the rolling elements. Each of the first circulating portions includes a first cylindrical portion fitted into a circulation component mounting hole of the nut member, and a second cylindrical portion which has an outer diameter larger than an outer diameter of the first cylindrical portion. The first cylindrical portion includes a rolling element introducing hole.

Rolling element screw assembly

A method and apparatus for inputting stitch patterns by way of a digitizer is effective to record stitching patterns which involve skipping and which extend beyond the digitizer board. In a method aspect, where stitch patterns involve skipping and the drawings of the patterns exceed beyond the digitizer plotting board, a method is provided including the steps of commanding scale-down input coordinate values and converting the input coordinate values to scale-up values to recover the reduced value. In an apparatus aspect, an input device is provided comprising a digitizer for drawing stitching patterns, control circuitry for performing scaling function, and command generating circuitry for commencing the scaling activity.

Sewing machine input device having scaling function

Sewing machine control apparatus

An input device for sewing machines comprising a means for making visible the sewing pattern up to the inflection point immediately followed by the inflection point to be modified to facilitate the modification of the sewing pattern, a means for inputting the coordinate data of the inflection point to be modified, a means for indicating the contents of the modification, and a means for operating the contents of the modification thus indicated under a predetermined control.

Input device for sewing machine

An input device for a sewing machine is partially provided in a portable unit connectable to a sewing machine. Efficiencies are achieved by relying on input portions present in the sewing machine. The portable input device includes control portions for inputting a stitch pattern, test running a stitch pattern, modifying a stitch pattern, writing a stitch pattern, and reading a stitch pattern. When the portable input device is coupled to the sewing machine, the stitch patterns may be executed.

A movement control apparatus for a sewing machine to automatically control movement initiating timing corresponding to various sewing machine speeds.

Movement control apparatus for sewing machine

There is provided an automatic sewing machine which comprises, a main shaft, a bed, a needle bar having a needle secured to the lower end thereof, a thread straining control device, an operation device and an alarm device.

Automatic sewing machine

An input device for sewing machines is disclosed which reads from a memory circuit an original sewing pattern which has been already stored, enlarging or reducing the coordinate data of the original sewing pattern in a desired scale, and prepare the coordinate data of sewing points between the flexing points thus obtained by enlargement or reduction in accordance with a desired stitch length data or stitch number data. The input device is adapted to convert the coordinate data of the original sewing pattern to the coordinate data calculated with the central point of a crank member of a work holder with the crank member as the origin and enlarge or reduce the coordinate data of the flexing points other than the starting point and the ending point of sewing in a desired scale, when the original sewing pattern is for a work holder with a crank member.

An input device for an electronically controlled sewing machine is effective for inputting stitch patterns which are partially prohibited from scaling up or scaling down. A control circuit is signalled that points of a stitching pattern are not to be scaled. A check bit added to the coordinate value of prohibited-scaling stitch points flags the scaling prohibition condition.

Sewing machine input device having scaling prohibit function

Thread tightening control apparatus of automatic sewing machine

A sewing machine having a work holder with a crank member in which a computing device is provided for computing coordinate values in accordance with the configuration of the work holder with the crank member and particularly, designed to convert coordinate values of a reference sewing pattern into coordinate values with the center of the crank member on the work holder with the crank member as the origin when the sewing pattern is enlarged or reduced in scale. When work holder with the crank member is returned to the sewing start point on the sewing pattern, the work holder with the crank member is returned in the direction of the X axis or Y axis depending upon the positional relationship between the existing position of the work holder with the crank member and a reference value.

Growing community of inventors

Tokyo, Japan

Kunio Takano