Sewing – Special machines – Buttonhole
Patent
1997-01-06
1998-09-08
Izaguirre, Ismael
Sewing
Special machines
Buttonhole
D05B 306, D05B 6922
Patent
active
058029990
ABSTRACT:
A stop cam is positioned on the main drive shaft of the buttonhole sewing machine. A stop lever moves axially between an engaged and a disengaged position. A heavy compression spring absorbs machine kinetic energy when the stop lever is in contact with the stop cam. A slide bar is positioned on one side of a lower end of the stop lever to hold the stop lever away from the stop cam. A spring positioned on the stop lever, opposite the slide bar, moves the stop lever into alignment with the stop cam. The tripping of a pedal moves the slide bar away from the stop lever thereby allowing the spring to move the stop lever into an engaged position. After substantial slowing, reaching the maximum displacement and spring loading, the cam presents a low flat surface to the stop lever. The spring pulls the lever against the flat and any remaining kinetic energy is too little for the cam to continue turning and raise the stop lever. The asymmetrical shape of the stop cam and the shape of the stop lever allows the sewing machine to come to rest in a predefined needle-up position. The stop bolt and spring housing are adjustable to provide exact stopping force and position.
REFERENCES:
patent: 714284 (1902-11-01), Dahl et al.
patent: 1669912 (1928-05-01), Reece
patent: 1915910 (1933-06-01), Allen et al.
patent: 2540730 (1951-02-01), Hayes
patent: 2825296 (1958-03-01), Sweet et al.
patent: 2889793 (1959-06-01), Mueller et al.
patent: 2989013 (1961-06-01), McGill et al.
patent: 3071090 (1963-01-01), Zeier
patent: 3126851 (1964-03-01), Carter
patent: 3499404 (1970-03-01), Nicolay
patent: 3565023 (1971-02-01), Lukins et al.
patent: 3693564 (1972-09-01), Hsiao
patent: 3804038 (1974-04-01), Martin et al.
patent: 3894500 (1975-07-01), Hsiao
patent: 3908568 (1975-09-01), Fujii
patent: 4455956 (1984-06-01), Yamamoto et al.
patent: 4658743 (1987-04-01), Brauch et al.
patent: 4730565 (1988-03-01), Iizuka
Papajewski Gerd
Papajewski, deceased Rudy
AMF Reece, Inc.
Creighton Wray James
Izaguirre Ismael
Narasimhan Meera P.
LandOfFree
Stop mechanism for a buttonhole sewing machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Stop mechanism for a buttonhole sewing machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stop mechanism for a buttonhole sewing machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1272234