Sewing – Work manipulating – Guides
Patent
1978-04-25
1979-03-20
Nerbun, Peter
Sewing
Work manipulating
Guides
318568, D05B 302
Patent
active
041448278
ABSTRACT:
Means are disclosed for permitting entry of operator selected stitch points in a switch array which exceeds the capacity of the switch array. In a switch array for a programmable memory of a sewing machine, the columns of switches are representative of the needle position and the rows of switches are representative of fabric position determined by accumulation of feed increments. Each required feed increment is determined by the change of the present stitch position coordinate for feed over the just prior stitch position coordinate for feed. In order to provide for feed increments in the forward direction beyond the number of rows provided, an artificial signal is generated for the just prior stitch position coordinate for feed representative of the first row of switches. To provide for feed increment in the reverse direction, an artificial signal is generated for the just prior stitch position representative of the last row of switches. Feed increment is thus calculated from a new starting point permitting continued operation in a selected direction.
REFERENCES:
patent: 4014275 (1977-03-01), Herr
patent: 4074642 (1978-02-01), Herr
patent: 4085691 (1978-04-01), Coughenour et al.
patent: 4092938 (1978-06-01), Coughenour et al.
Bell Edward L.
Nerbun Peter
Schmidt Edward P.
Smith Robert E.
The Singer Company
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