US 4,462,433 AGranted

Mechanical warp stop motion apparatus

AssigneeGrob & Co. Aktiengesellschaft

InventorMartin Graf

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Abstract

A warp stop motion apparatus includes individual disengageable coupling and control elements which have fork-like ends that are capable of surrounding the lateral sides of drive pins extending outwardly from the opposite sides of the end portions of the respective inner movable serrated bars which slidingly extend into a housing part that is oscillated back and forth by an individual electrical motor. Oscillation of the housing part causes the inner serrated bars to oscillate in their longitudinal direction with respect to outer stationary serrated bars in which they are positioned. Separate adjustable spring loaded locking cams act to keep each coupling and control element in position; however, if an inner serrated bar becomes blocked with respect to its movement relative to the associated outer serrated bar due to drop wire falling across the teeth thereof, the associated coupling and control element will rotate, causing a contact spring to close an electrical circuit which activates a switch to stop the weaving machine and the oscillating movement of the housing part.

Claims7

Dependent claims

A mechanical warp stop motion apparatus which includes a multiplicity of spaced apart outer serrated bars which are stationarily mounted to be parallel, side-by-side relationship;

a multiplicity of inner serrated bars, each inner serrated bar being movable in its longitudinal direction within an outer serrated bar;
and means to move each inner serrated bar with respect to its associated outer serrated bar and to detect when any of the inner serrated bars are prevented from movement with respect to its associated outer serrated bar by a drop wire falling across the serrations of the bars, said movement and detection means including a housing into which an end portion of each inner serrated bar extends, drive means connected to the housing to move it back and forth in the longitudinal direction of the inner serrated bars, and multiplicity of coupling and control elements located in the housing, a separate coupling and control element being attachable and disengagable from the end of each inner serrated bar located in the housing, and separate means in the housing in contact with each coupling and control element to determine if it has become at least partially disengaged from the end of its associated inner serrated bar due to blockage of movement of the inner serrated bar due to a drop wire falling across the associated inner and outer serrated bars.

Dependencies are inferred from the claim text.