Sewing – Elements – Driving mechanisms
Patent
1990-09-17
1991-04-02
Nerbun, Peter
Sewing
Elements
Driving mechanisms
112225, D05B 5516, D05B 8702
Patent
active
050038990
ABSTRACT:
In a device for disconnecting a needle bar from a needle-bar connecting stud on a sewing machine, a drive source drives a moving board. The moving board lowers a predetermined distance until a threading hook goes through an eye in a needle. A disconnecting member rotates a clutch click and disconnects the clutch click from a needle-bar connecting stud. The needle bar thus disengages from the needle-bar connecting stud. The moving board further lowers, an actuating rod lowers, the actuating rod in turn lowers a threading rod, the threading rod further rotates, and the threading hook goes through the eye. The needle is thus threaded. The disconnecting operation and the threading operation are carried out by using the drive source in common. Consequently, the device is simple in structure and compact in size. Since the needle bar only rises to disengage from the needle-bar connecting stud, no scratches are given on the fabric. The sewing machine can effectively execute pattern-sewing, basting and other operations.
REFERENCES:
patent: 4098207 (1978-07-01), Peterson
patent: 4325313 (1982-04-01), Kawai et al.
patent: 4651660 (1987-03-01), Oshima et al.
Brother Kogyo Kabushiki Kaisha
Nerbun Peter
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