US4220101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic pattern generation type sewing machine
Assignee: Yaskawa Electric Corp
•
Filing: 1978-09-25
•
Granted: 1980-09-02
•
Expires: 1998-09-25
Abstract
Abstract In an automatic pattern generation type sewing machine, a function generating device generates stitch positions using a signal synchronous with the rotation of the armshaft of the sewing machine, a digital signal generating device provides digital signals corresponding to the stitch positions, and a servo driving device, using the digital signals, moves the cloth or the needle, to thereby form a variety of geometrical stitch patterns automatically.
Inventors
- 👤 Sadaaki Nanai
- 👤 Akinobu Iwako
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:51
CPC Classifications
D; D05; D05B; D05B19/00; D05B19/02; D05B19/04; D05B19/08; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/41; G05B19/4103; G05B2219/00; G05B2219/30; G05B2219/34; G05B2219/34161; G05B2219/34174; G05B2219/50; G05B2219/50103
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
In an automatic pattern generation type sewing machine, a digital signal generating device including function generation means for sequentially calculating stitch positions in accordance with an arithmetic function and selected input parameters and means for outputting digital signals corresponding to the calculated stitch positions, said function generation means being operable in accordance with signals synchronous with the rotation of the arm shaft of the sewing machine and with pulses from a clock pulse generator which have a higher frequency than said synchronous signals, and a servo driving device which employs said digital signals as feed and bight positions of the needle of said sewing machine to move a piece of cloth or the needle and thereby form a particular stitch pattern.
Claim 2
Dependent Claim
121 words
In an automatic pattern generation type sewing machine, a digital signal generating device including function generation means for sequentially calculating stitch positions in accordance with an arithmetic function and selected input parameters and means for outputting digital signals corresponding to the calculated stitch positions, said function generation means being operable in accordance with signals synchronous with the rotation of the arm shaft of the sewing machine and with pulses from a clock pulse generator which have a higher frequency than said synchronous signals, and a servo driving device which employs said digital signals as feed and bight positions of the needle of said sewing machine to move a piece of cloth or the needle and thereby form a particular stitch pattern.
Claim 3
Dependent Claim
30 words
A machine as claimed in claim 1, wherein said function generating device generates a single function and includes means for producing different pattern positions in accordance with different input parameters.
Claim 4
Dependent Claim
50 words
A machine as claimed in claim 1, wherein there are a plurality of digital signal generating devices each having a function generation means for calculating stitch positions, and calculating means for performing an arithmetic operation on the outputs from said digital signal generating devices for producing a compound stitch pattern.
Claim 5
Dependent Claim
35 words
A machine as claimed in claim 1, wherein means are provided for causing said needle to return to its initial position after the needle has reached a predetermined position in order to repeat the pattern.
Claim 6
Dependent Claim
22 words
A machine as claimed in claim 1, further comprising means to form a zigzag pattern utilizing the function as an envelope curve.
Claim 7
Dependent Claim
21 words
A machine as claimed in claim 1, wherein said function generation means is operable to cause any pattern to be retraced.
Claim 8
Dependent Claim
23 words
A machine as claimed in claim 1, wherein the input parameters for generating a desired pattern are input by means of a keyboard.
Claim 9
Dependent Claim
31 words
A machine as claimed in claim 1 wherein means are provided to modify the signals from the digital signal generating device in accordance with different input parameters to produce different patterns.
References Cited (Backward Citations)
US3742878A
Cited
US3984745A
Cited
JPS5136414A
Cited
US3977338A
Cited
US4122786A
Cited
US4142473A
Cited
DE2757735A1
Cited
DE2813220A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |