Sewing – With tables or stands – For plural sewing units
Patent
1974-08-21
1976-07-06
Hunter, H. Hampton
Sewing
With tables or stands
For plural sewing units
D05B 6926
Patent
active
039675661
ABSTRACT:
A machine, for example a sewing machine, including a cyclically movable motor-driven element and comprising a motor for cyclically driving the element through a drive transmission. The motor has a drive shaft connected to a first input member of the drive transmission by a releasable coupling. Means are provided to release the coupling and to activate an auxiliary drive coupled to a second input member of the drive transmission. The auxiliary drive is operative to continue the drive to the driven element after the coupling has been released. Means are provided indicating a predetermined position in which the drive element is to be stopped. Sensing means are provided for sensing the indicating means. A brake disc is movably connected to an output member of the drive transmission. Means are provided to magnetically move the brake disc to brake the drive transmission output member in response to the sensing means and to disconnect the auxiliary drive means whereby to stop the driven element within one complete cycle of movement of the driven element and substantially at the predetermined position.
REFERENCES:
patent: 2759444 (1956-08-01), Schwab et al.
patent: 2967499 (1961-01-01), Cohen
patent: 3149593 (1964-09-01), Johnston
patent: 3174450 (1965-03-01), Becker et al.
patent: 3237579 (1966-03-01), Medynski et al.
patent: 3622854 (1971-11-01), Osaka et al.
patent: 3804043 (1974-04-01), Benson et al.
patent: 3818849 (1974-06-01), Maddox
Spiegel Mitchell
Spiegel Murray
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