Electric stop motion apparatus for a textile machine
AssigneeRieter Machine Works, Ltd.
InventorsHeinz Clement, Christina Furrer
Life of this patent
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Abstract
In textile machines fed with fibre slivers, such as e.g. drawframes, immediate stopping of the machine is required in case of a sliver breakage before or on the feed table. This requirement is fulfilled using the inventive stop motion apparatus quickly and reliably, by tilting a pan arranged beneath each normally running fibre sliver and which does not contact such fibre sliver. The reaction time of the stop motion apparatus can be shortened by providing a heavy body on, and movable with respect to, the pan, the body being e.g. in the form of a steel ball. Since the pan in its working position does not contact the normally running fibre sliver, slivers of improved quality are produced and contamination of the stop motion apparatus is avoided.
Claims8
An electric stop motion apparatus for a textile machine which is fed with traveling fiber slivers, particularly a drawframe, wherein a respective pair of feed rolls are provided for each fibre sliver for feeding the fiber sliver in a predetermined direction of travel, comprising:
- a respective tiltable pan provided for each infed fiber sliver;
- means mounting each said tiltable pan for tilting movement between a working position and a stop position;
- tilting of said tiltable pan being accomplished by depletion of the fiber sliver either upstream or downstream of the related pair of feed rolls with respect to said predetermined direction of travel of the sliver, in order to thus activate an electric stop motion contact upon depletion of the fiber sliver either upstream or downstream of said related pair of feed rolls;
- said tiltable pan being arranged beneath the normally running fiber sliver without being in contact with said fiber sliver;
- said mounting means for said tiltable pan defining a horizontal tilt axis arranged substantially perpendicular to the direction of travel of the fiber sliver;
- stop means positioned to cooperate with said tiltable pan;
- said tiltable pan possessing a mass distribution which is selected such that when the pan is in its working position it is maintained against said stop means through a self-holding action exerted by said tiltable pan;
- and
- tilting of the pan into its working position being accomplished by overcoming the self-holding action of said tiltable pan through the application of an external force while the tiltable pan passes through an unstable neutral position.
Dependencies are inferred from the claim text.