Abstract: A noise detecting and recording apparatus which can be widely used for countermeasures against malfunction of electronic equipment which is caused by noises is provided. The apparatus is provided with a unit for outputting data corresponding to the level of a conduction noise, a unit for outputting the data corresponding to the level of a radiation electromagnetic field noise, a unit for outputting the data corresponding to the level of a discharge noise, a temperature and humidity detection unit for detecting temperature and humidity and outputting the data corresponding to the detected value, a microcomputer for processing the output data from each unit, a display unit for displaying the output data, and a recording device for recording data, wherein the microcomputer performs the processing of receiving the output data from each unit and supplying the data to the display unit, and the processing of receiving the output data from each unit and recording the data in the recording device.

Abstract: In the present sensor element failure or end of life judging method, the internal impedance of a gas sensor element is measured and, if the thus measured internal impedance goes beyond a previously determined threshold value, then it is judged that the gas sensor element fails or comes to the end of life.

Abstract: A corrosion preventive material contains zinc and is applied to the surface of a metal product for preventing corrosion of the product. The material consists essentially of a base material of synthetic resin and 65% or more zinc powder by weight dispersed in the base material, the zinc powder containing 25% or more zinc powder by weight having a grain diameter of or above 150 .mu.m. Alternatively, the corrosion preventive material consists essentially of a base material of synthetic resin and 45% or more zinc powder by weight dispersed in the base material, the zinc powder containing 90% or more zinc powder by weight having a grain diameter of or above 150 .mu.m.

Abstract: A connector includes a body having a pipe receiving portion and includes a clip which cooperates with a removal prevention protrusion formed on the pipe for preventing the pipe from removal from the body. The pipe receiving portion has an inner diameter to permit insertion of at least the pipe. A clip fitting portion is formed on the pipe receiving portion and has engaging holes. The clip is made of resilient material and has a ring-shaped configuration. The clip has both circumferential ends confronting each other. The clip is biased in a direction to reduce its diameter and can expand its diameter for fitting on the clip fitting portion. Engaging claws are formed on the clip and adapted to be inserted into the engaging holes so as to engage the pipe. Each of the engaging claws includes a rear surface which abuts on the pipe when the pipe is inserted and which is formed as an inclined surface for permitting insertion of the pipe.

Abstract: A cushioning device for use with a pneumatic impact tool which utilizes a part of compressed air for driving the piston of the tool as cushioning means and is self controllable.