Importance

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Abstract

In a back rest arrangement on a weaving machine the back rest is preferably carried at each of its ends by one arm of a two-armed support frame or yoke which is pivotable about a stationary pivot axis on a machine frame. At least one of the arms of the support frame or yoke possesses a resilient portion or shank. A free end of the resilient shank is supported in a manner which is relatively rigid in relation to a pivoting motion of the support frame or yoke caused by the varying warp force acting on the back rest. The resilient shank is in operative association with a sensing probe for generating an electrical signal which is proportional to the deflection of the resilient shank. These measures render the arrangement suitable both for a so-called rigid or fixed back rest support as well as for a back rest support utilizing a rocking lever or rocker beam. Consequently a simple, functionally reliable and accurate conception of a back rest arrangement can be achieved while still avoiding complex lever constructions and compensating rollers.

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First Claim