Abstract: A numbering machine includes a digital data control system for varying the print data. A keyboard panel is provided for introducing a desired initial number from which the numbering operation should begin. A desired skip number is introduced through the keyboard panel to set the numerical gap between successively printed numbers so as to perform the numbering operation, for example, 2, 4, 6, 8, 10, . . . . The digital data control system can also perform a subtraction operation. Further, the number of times of the same data is printed may be preset to perform the numbering operation, for example, 1, 1, 1, 2, 2, 2, 3, 3, 3, . . . . These functions can be combined to perform a wide variety of numbering functions and sequences.

Abstract: In a sewing machine including a static memory for storing digital information related to the positional coordinates for each stitch of a predetermined stitch pattern, a dynamic memory such as a shift register is provided for temporarily storing the digital information derived from the static memory. Output signals of the dynamic memory are applied to a needle positioning mechanism and a work feed mechanism through driving means. In a preferred form, input means are provided for modifying the digital information temporarily stored in the dynamic memory, thereby modifying the stitch pattern.