EP 1882767 B1 20130724 - Device for monitoring the needle thread
Title (en)
Device for monitoring the needle thread
Title (de)
Vorrichtung zur Überwachung des Oberfadens
Title (fr)
Dispositif de surveillance du fil supérieur
Publication
Application
Priority
CH 12302006 A 20060728
Abstract (en)
[origin: EP1882767A1] The device for monitoring breakage of the needle thread (9) on automatic threading devices of a sewing machine, comprises a thread regulator with a regulator spring (25), a cam switch (39), which is effectively connected to the regulator spring and is inserted between a thread lever and a thread tension device, and a sensor (45) for monitoring presence or absence of the cam switch at the sensor. The cam switch comprises two detection zones (41) and the sensor has two independent switched detection areas. The cam switch is pivotal on a shaft stump and comprises an arc-segment shaped body. The device for monitoring breakage of the needle thread (9) on automatic threading devices of a sewing machine, comprises a thread regulator with a regulator spring (25), a cam switch (39), which is effectively connected to the regulator spring and is inserted between a thread lever and a thread tension device, and a sensor (45) for monitoring presence or absence of the cam switch at the sensor. The cam switch comprises two detection zones (41) and the sensor has two independent switched detection areas. The cam switch is pivotal on a shaft stump and comprises an arc-segment shaped body, with which a peripheral area of the detection zones is provided. The detection zones are light/dark areas, recesses or protrusions. The sensor comprises two parallel located light bars or proximity switches as detection means, which are arranged in a parallel or serial manner.
IPC 8 full level
D05B 51/00 (2006.01); D05B 47/04 (2006.01)
CPC (source: EP US)
D05B 51/00 (2013.01 - EP US); D05B 47/04 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE LI SE
DOCDB simple family (publication)
EP 1882767 A1 20080130; EP 1882767 B1 20130724; US 2008022908 A1 20080131; US 7536963 B2 20090526
DOCDB simple family (application)
EP 07405114 A 20070411; US 78054707 A 20070720