Abstract: An apparatus for measuring a thickness of a coating formed on a surface of a component member includes a white light source for emitting a light beam to be reflected by the surface of the member, one or more filters, each of the filters capable of filtering the reflected light beam in a selected wavelength range, an identical number of photo-detection sections as filters, each of the photo-detection sections being used for converting the intensity of the filtered light beam into a counting reference signal having a logic high and low states, a counter for counting the logic high states to generate a count number and a signal processor for computing the coating thickness based on the count number. Each of the photo-detection sections has a photo-detector, an ampere-to-voltage convertor, a peak voltage value detector and a comparator.

Abstract: A video cassette player includes a main base, a head drum assembly including a rotary drum, a stationary drum, a rotating shaft and a driven gear pressed on and fixed to a lower end portion of the rotating shaft, a capstan motor provided with a capstan shaft, a driving pulley fixed to a lower end portion of the capstan shaft, an idler assembly provided with a bracket, a hinge shaft, an idle gear, an intermediate gear and a first driven pulley, a driving assembly including a shaft, a driving gear and a second driven pulley, and a first and a second belts. The shaft of the driving gear assembly is rotatably fixed to the main base, and the driving gear and the second driven pulley are, in turn, fixed to a lower portion of the shaft, the driving gear being engaged with the driven gear of the head drum assembly.