LOCKING DEVICE FOR A BOBBIN CASE FOR A BOTTOM THREAD BOBBIN
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United States of America Patent
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Issued Date -
Aug 19, 2010
app pub date -
Feb 4, 2010
filing date -
Feb 17, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A locking device having a connection element (11) that is securely connected to the hook base (1) but can rotate is provided. On the connection element (11), a coil spring (17) is supported that is compressed after setting the bobbin case (5) on or in the hook base (1). Through a slight tilting movement, the bobbin case (5) or the bobbin (7) could be pushed and guided over the connection element (11) and then held by the force of the spring (17) in the locking position.
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