EP 0324172 B1 19910807 - DEVICE FOR MONITORING THE POSSIBLE ENTANGLEMENT AROUND A CYLINDER FOR GUIDING A TEXTILE SLIVER
Title (en)
DEVICE FOR MONITORING THE POSSIBLE ENTANGLEMENT AROUND A CYLINDER FOR GUIDING A TEXTILE SLIVER
Publication
Application
Priority
CH 7488 A 19880111
Abstract (en)
[origin: EP0324172A1] A device for monitoring lap formation on a roving-or sliver-guiding pair of rollers of a drawing unit for spinning machines consists in that, when a lap is forming, for example on a pressure roller (7), a piston rod (26) of a piston (25) is displaced upwards (in the viewing direction in this Figure), until a switch element (33) touches a contact edge (38) of a switch sleeve (37). The cylinder housing otherwise separated electrically from the piston (25) and surrounding the switch sleeve is thereby short-circuited relative to the piston (25). Since the two parts are connected separately from one another to a control unit (41), this short-circuit causes the execution of a switching function in the control unit, as a result of which the drawing unit is stopped. <??>According to the invention, the switch sleeve (37) is so guided slidably on a guide rod (36) embedded in the upper part (22) that the frictional resistance is higher than the weight of the switch sleeve (37). <??>The electrical separation between the cylinder housing and piston (25) is obtained in that the sliding bush (27) and the lid-shaped closing part (24) each consist of electrically insulating material. <??>If the pressure cylinder (7) has to be ground back for any reason and therefore reduced in diameter, the switch sleeve (37) is automatically pushed forward by the lid-shaped closing part (34), so that the switch spacing H always remains the same. <IMAGE>
IPC 1-7
IPC 8 full level
D01H 5/60 (2006.01); D01H 5/38 (2006.01); D01H 5/52 (2006.01); D01H 13/14 (2006.01)
CPC (source: EP US)
D01H 5/525 (2013.01 - EP US); D01H 13/14 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE ES GB IT LI
DOCDB simple family (publication)
EP 0324172 A1 19890719; EP 0324172 B1 19910807; DE 3864137 D1 19910912; ES 2026246 T3 19920416; JP 2815375 B2 19981027; JP H01213420 A 19890828; US 4890359 A 19900102
DOCDB simple family (application)
EP 88121817 A 19881229; DE 3864137 T 19881229; ES 88121817 T 19881229; JP 295889 A 19890111; US 29471989 A 19890109