Vibration in Textile Testing Devices 1

Abstract

As part of a critical review of all testing and measuring equipment in the Cotton Laboratory of the Chicopee Manufacturing Corp., two testing devices, the Saco-Lowell Sliver Tester and the Belger Roving Tester, were rebuilt to run at increased speed, and the behavior of a Tensile Tester was investigated. Increasing the speed of the machines required the reduction of inertia, the substitution of springs for dead weights, and other alterations to reduce vibration. The investigation of the Tensile Tester shows that this machine has inherent characteristics which render it unsatisfactory for use on new materials of high elasticity or others with unusual properties.The speeds of both the sliver tester and the roving tester have been increased by a factor of approximately seven.The Cotton Laboratory of the Research Division of the Chicopee Mfg. Corp., at Chicopee Falls, Mass., is equipped with three conventional pieces of apparatus in the form of a Scott Pendulum Type Tensile Tester, a Saco-Lowell Sliver Tester, and a Belger Roving Tester. As part of a general program to re-equip all the laboratories of the Division for true research work rather than for routine mill testing, each of these devices was studied critically to determine its suitability for the work involved, its adaptability to other uses than that for which it was designed, and its general fitness as a physical instrument. The outstanding defect in all the machines was found to be considerable inertia and a tendency toward vibration which severely limited the operating speed. Improving the Sliver TesterThe Saco-Lowell Sliver Tester con-