is used for the soleadhesion of the footwear. A Digital model is also available. The system consistsof a spring dynamometer to indicate the load applied at the junction of thesole and the upper, a lever arrangement to transmit the load exerted on the toepiece to the spring dynamometer, a straight edge fulcrum for resting the shoeon during the test, and a set of interchangeable toe pieces having differentcurvature. The spring dynamometer indicates the load applied on the jointdirectly in kilograms, taking into account the mechanical advantage of thelever transmitting the force from the toe piece to it. The load is indicated ona circular dial. The dynamometer has two pointers, a black powder to indicatethe instantaneous load acting on the toe piece and a red dummy pointer toindicate the maximum load applied before failure of adhesion. The toe piece isfive in number and having a different curvature to enable toes and heels ofdifferent shapes and sizes to be tested. The length of the arc of each toe piece,however, is the same to ensure that the load is applied only to a fixed lengthof joint. They are made from carbon steel for giving long operational life.Any one of the toe pieces can be held in the equipment at one time. The fulcrumon which the shoe is placed during the test has an adjustable height to enablesoles of different thicknesses to be tested. The height of the fulcrum isadjusted with the help of spacer strips provided with the instrument. Theinstrument is finished in painting and bright chrome plating to give it acorrosion-resistant finish.
Â· Â· Is 11226 - 1993: specification for leather safety footwearhaving direct molded sole