Programmable stitch pattern forming control in an electronic sewing machine
AssigneeSharp Kabushiki Kaisha
InventorsAkira Tanimoto, Sanao Katoh, Yukihiro Yoshida
Life of this patent
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Abstract
Digital information related to plural kinds of stitch patterns is stored in a memory means such as an ROM disposed within an electronic sewing machine. A keyboard means is provided for selecting desired stitch patterns stored within the ROM at operator's choices. Output signals of the keyboard means are temporarily stored in a dynamic memory means such as a shift register. A digital control circuit is arranged so that the ROM develops signals related to the stitch pattern selected through the shift register, to thereby control a stitch forming mechanism.
Claims24
In an electronic sewing machine which forms a stitch pattern by a stitch forming section responding to a needle position controlling signal and a work feed controlling signal, the improvement comprising:
- a memory means for storing digital stitch information related to plural kinds of stitch patterns;
- input means for selecting a desired stitch pattern stored in said memory means;
- a program memory for storing a plurality of selection commands derived from said input means in the order of the selection operation conducted through said input means;
- control means for sequentially developing the digital stitch information related to the stitch pattern which is selected by said selection command stored in said program memory;
- and
- means for applying the digital stitch information developed by said control means to said stitch forming section as the needle position controlling signal and the work feed controlling signal.
In an electronic sewing machine which includes a stitch forming section for forming a stitch pattern in response to a needle position controlling signal and a work feed controlling signal, the improvement comprising:
- a memory means for storing digital stitch information related to plural kinds of stitch patterns;
- keyboard means for introducing selection commands for selecting a desired stitch pattern stored in said memory means;
- a dynamic program memory for storing the selection commands derived from said keyboard means;
- means for selecting the desired stitch pattern stored in said memory means in accordance with the selection commands stored in said dynamic program memory;
- a synchronization pulse signal generator for developing a synchronization pulse signal in response to stitch formation conducted by said stitch forming section;
- an address counter connected to receive said synchronization pulse signal for sequentially addressing the digital stitch information related to the selected stitch pattern stored in said memory means;
- and
- means for applying the digital stitch information derived from said memory means to said stitch forming section as the needle position controlling signal and the work feed controlling signal.
A digital control circuit for an electronic sewing machine which includes a stitch forming section for forming a stitch pattern in response to a needle position controlling signal and a work feed controlling signal, said digital control circuit comprising:
- a. a memory means for storing digital stitch information related to plural kinds of stitch patterns;
- b. input means for selecting a desired stitch pattern stored in said memory means;
- c. a program memory for storing a plurality of selection commands derived from said input means in the order of the selection operation conducted through said input means;
- d. control means for sequentially developing the digital stitch information related to the stitch pattern which is selected by said selection command stored in said program memory;
- and
- e. means for applying the digital stitch information developed by said control means to said stitch forming section as the needle position controlling signal and the work feed controlling signal.
In an electronic sewing machine which includes a stitch forming section for forming a stitch pattern in response to a needle position controlling signal and a work feed controlling signal, the improvement comprising:
- a memory means for storing digital stitch information related to plural kinds of stitch patterns;
- input means for introducing selection commands for selecting a desired stitch pattern stored in said memory means, and for introducing repetition commands for instructing the repetition number of the selected stitch pattern;
- a program memory for storing the selection commands and the repetition commands derived from said input means;
- means for selecting the desired stitch pattern stored in said memory means in accordance with the selection commands stored in said program memory;
- and means for sequentially applying the digital stitch information derived from said memory means to said stitch forming section as the needle position controlling signal and the work feed controlling signal.
In an electronic sewing machine which forms a stitch pattern by a stitch forming section responding to a needle position controlling signal and a work feed controlling signal, the improvement comprising:
- a memory for storing digital stitch information related to plural kinds of stitch patterns;
- input means for selecting a desired stitch pattern stored in said memory means;
- a program memory for storing selection commands derived from said input means;
- control means for sequentially developing the digital stitch information related to the stitch pattern which is selected by said selection command stored in said program memory;
- means for applying the digital stitch information developed by said control means to said stitch forming section as the needle position controlling signal and the work feed controlling signal;
- and
- a mode selection switch for placing the electronic sewing machine in a single stitch formation mode wherein only one type of stitch pattern is formed.
Dependencies are inferred from the claim text.