Hand-operated lock stitch sewing machine
AssigneeThe Singer Company
InventorsStanley Joseph Ketterer, Francis Ivanko
Life of this patent
Estimating the term…
Abstract
A hand-held single-thread lockstitch sewing machine or stitcher for attaching buttons, snaps, bar tacks, or the like, employs a boat-type shuttle for capturing the loop thrown by the needle. A limited length of bottom thread is stored by manually positioning a lever which directs the loop over a finger-like projection in the shuttle to trap the loop. Repositioning the lever will allow the machine to sew normally with the loop passing around the shuttle and picking up the stored thread. Bottom tension is applied by magnetically attracting the shuttle to the carrier wall and passing the bottom thread between the shuttle and the carrier wall.
Claims6
In a hand stitcher having a frame;
- a throat plate adjacent a first end of said frame;
- a needle carrier pivotally connected at one end to the second end of said main frame and supporting a thread carrying eye pointed needle at the opposite end;
- a thread cutter positioned at a predetermined distance from said eye pointed needle;
- a shuttle carrier slideably mounted within said frame and geared to move toward and away from said throat plate upon respectively depressing and raising said needle carrier;
- and a boat-type shuttle loosely confined within a cage connected to the shuttle carrier, the improvement comprising:
- holding means connected to said shuttle for trapping the leg of the thread loop thrown by the needle upon the first depression of the needle through said throat plate whereby thread, having a length determined by the distance of said thread cutter from said needle eye, is drawn beneath said throat plate to provide the bottom thread for producing lockstitches.
Dependencies are inferred from the claim text.