Needle thread guide device
AssigneeFritz Gegauf AG Bernina-Naehmaschinenfabrik
InventorsErnst Dreier, Kurt Spring
Life of this patent
Estimating the term…
Abstract
A needle thread guide device containing an articulated thread feeder oscillating in a vertical plane on a sewing machine provided with a skip stitch mechanism working at intervals to form stitches of varying lengths, wherein a thread catcher is combined with a thread lever which can be engaged and disengaged synchronously with the skip stitch mechanism and which aligns in its operating position with a hook eye open to the top at a position of the upper area of the ascending movement part of the thread lever eye with the latter, thereby catching the thread loop which is carried along by the thread lever.
Claims8
A needle thread guide device for use with a sewing machine provided with a skip stitch mechanism operating at intervals to form stitches of varying lengths comprising:
- a thread feeder being operatively, articulated mounted to oscillate in a vertical plane;
- drive means operatively connected to said thread feeder for imparting oscillating motion thereto;
- a thread catcher operatively mounted adjacent to said thread feeder;
- lever means operatively connected to said thread catcher for engaging and disengaging said thread catcher in synchronism with the skip stitch mechanism;
- said thread feeder including a hook eye disposed at one end thereof;
- oscillating means operatively connected to said thread feeder for moving said hook eye in an ascending path having an upper reversal point and a descending path;
- said thread catcher including a hook eye being aligned in an operative position with the hook eye of said thread feeder at said upper reversal point of said ascending path for catching a thread loop being fed by said thread feeder.
The needle thread guide device according to clam 3, wherein the lever means, which simultaneously activates the thread catcher lever and the skip stitch mechanism, is coupled with a feeler lever which can be engaged and disengaged by a cam which serves as a skip stitch program carrier.
Dependencies are inferred from the claim text.