Twin needle memory device

Details Twin needle memory device Twin needle memory device

1978-09-11

1979-04-17

Nerbun, Peter

Sewing

Work manipulating

Guides

112163, D05B 302, D05B 108

Patent

active

041494768

ABSTRACT:
A twin needle memory device for an electronically controlled sewing machine having a variety of patterns and sewing condition capabilities selectable by means of proximity switch devices. A non-volatile external storage having a one bit capability is provided to retain information as to the last state of the sewing machine, relative to twin needle, upon power interruption; and to provide for proportionate reduced amplification of the bight analog signal in the event that the twin needle mode of operation is selected. Upon reinitiation of power, the state of the external storage is ascertained and used to determine the state of a twin needle flip flop part of the electronic control system of the sewing machine. Subsequent change in twin needle condition is implemented through the proximity switch devices and an additional one second delay count to alter the state of the twin needle flip flop. This alteration in the state of the twin needle flip flop will also alter the state of the non-volatile external storage device.

REFERENCES:
patent: 3982491 (1976-09-01), Herzer et al.
patent: 4048932 (1977-09-01), Odermann et al.
patent: 4055130 (1977-10-01), Larsen et al.

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