Abstract: A method for attaching a stretched damper wire to a cathode ray tube including the steps of locating each end of a damper wire at a first position with respect to a pair of damper springs and welding each end of the damper wire to each of the damper springs while holding the damper wire between each of the damper springs and a welding ribbon. Next, the damper springs are moved to a frame of the cathode ray tube and welded at second positions thereof to upstanding portions of said frame so as to stretch the damper wire between the damper springs on an aperture grill.

Abstract: A method of and apparatus for measuring a tension by the steps of vibrating a measured object of a line- or belt-shaped configuration by the flow of air from an air nozzle so that the measured object is resonated, counting the number of vibrations of the measured object per second by the radiation of a laser light emitted from a very small distance measuring device, and calculating a resonance frequency of the measured object from the number of the vibrations to thereby obtain a tension of the measured object.