Method of controlling an electronic sewing machine
AssigneeJanome Sewing Machine Co., Ltd.
InventorsHachiro Makabe, Takeshi Kongoh, Haruhiko Tanaka
Life of this patent
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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.
Claims5
A method of controlling an electronic sewing machine including a driving means for reciprocating a needle within a predetermined amplitude range, means for feeding a fabric through a middle position of the needle amplitude range and an electronic memory for storing binary stitch control data for a plurality of different patterns, comprising the steps of storing said stitch control data at random memory locations;
- combining each stitch control data with a next address code;
- sequentially reading out the stored stitch control data pertaining to a selected pattern;
- and using the next address code as a new stitch control data applied to said needle driving means to produce a specific version of the selected pattern.
An electronic sewing machine including means for reciprocating a needle within a predetermined amplitude range, means for feeding a fabric through a middle point of the needle amplitude range and means for controlling position of the needle in the amplitude range, comprising
- (a) a pulse generator operating in synchronism with said reciprocating means to generate a sequence of timing pulses;
- (b) a memory for storing at random locations thereof stitch control data for a plurality of different patterns, said stitch control data being combined with a next address code;
- (c) means for sequentially reading out the stored stitch control data from said memory locations each time a timing pulse is generated by said pulse generator;
- (d) means for receiving from the read out stitch control data a part assigned to said needle position control means;
- (e) means for receiving from the read-out stitch control data a part assigned to said fabric feeding means;
- and
- (f) means for applying a designation signal to said first and second receiving means, said designation signal causing said first receiving means to receive said next address code and to output the same as a signal for controlling said needle position control means, and further causing said second receiving means to produce a new set of output data applied to said fabric feeding means.
Dependencies are inferred from the claim text.