US 4,432,195 AGranted

Device for interrupting the feed of a roving to drawing frames

AssigneeSpindelfabrik Suessen, Schurr, Stahlecker & Grill GmbH

InventorGerd Stahlecker

Life of this patent

Estimating the term…

Loading patent…

Abstract

A device is provided for interrupting the feed of a roving to drawing frames on ring spinning machines in response to thread breakage at a respective spinning unit. The device includes a clamping segment annularly clamped about a lower drawing roll and having abuttments for selectively lifting the upper drawing roll away from the lower roll to interrupt the feed of roving in response to movement of the clamping segment to an interrupting position. To control the clamping segment, a locking detent lever is provided which is spring-loaded into a locking position engaging the clamping segment and movable to an unlocking position in response to an electrical drive mechanism which, in turn, is controlled by a thread end break detection device. In particularly preferred embodiments, a capacitor is used to energize the drive means to unlock the lever, the capacitor being charged during normal spinning operation and discharged for a preset time period during the unlocking operation.

Claims9

Dependent claims

Device for interrupting the feed of a roving to the drawing frames of a spinning machine of the type having drawing frames which each comprise a plurality of upper and lower drawing rollers disposed pairwise, said device comprising:

a clamping segment including an engagement means located on one of said drawing rollers adjacent the feed side of the roving, said clamping segment being movable from an operative position permitting the driving of said drawing rollers and feed of said roving to an interrupting position interrupting the feeding of said roving,
a locking device including a locking lever engageable with said engagement means for maintaining said clamping segment in said operative position,
a broken-end detector means for monitoring breaks in thread being spun at the spinning machine,
actuator means responsive to a brief input from a control means for controlling disengagement of said locking device from said engagement means, and
control means responsive to said broken-end detector means for controlling said actuator means, wherein movement of the clamping segment to said interrupting position is in response to detection of a broken thread by said broken-end detector means.

2 more elements

Dependencies are inferred from the claim text.