Input selector for an electronic sewing machine
AssigneeHusqvarna Aktiebolag
InventorBengt A. Bergvall
Life of this patent
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Abstract
An input selector for a fancy seam sewing machine is provided with pattern selection means and an electronic seam memory for supplying stitch data to needle positioning and feeder mechanisms has, within the pattern selection means, at least one switch controlling the adjustment to a selected series of seams, e.g. utility seams, and a group of multi-pole contacts related to these seams. The contacts apply binary signals to the electronics of the machine and, in an illustrated embodiment with six double-pole contacts, a "two of four code" is achieved. This reduces the number wires required as compared with a system using single-pole switches.
Claims7
In an input selector for an electronic sewing machine provided with addressing and activating circuits and a memory unit for production of stitch codes for carrying out pattern seams by the stitch forming instrumentalities of the machine;
- the improvement wherein the selector comprises a set of electric switches with multi-pole contacts and connected to produce binary codes on a wire group coupled to said addressing circuits and memory, there being at most the same number of wires in said wire group coupled to the poles of any of said switches as the number of poles in the respective switch.
Dependencies are inferred from the claim text.