OCR Text |
Show Irregular Working In Machinery. A simple method has been devised by means of which, in tho midst of a busy workshop full of machinery in motion, any special noise, even though slight, can be distinguished and its origin traced. Tho apparatus consists of an ordinary India rubber gas tube about a yard in length; the length may, however, how-ever, bo varied to suit tho nature of the investigation. The tube is unprovided with earpiece or boll. One end is applied ap-plied to tho ear of the observer while the other is moved about in order to explore ex-plore the seat of tho irregularity. Since the froe orifice of tho tube is comparatively compara-tively small and is applied as closely as possible to the vibrating surface it practically prac-tically receives only those sonorous vibrations vibra-tions which are emitted by this surface. Those who have to do with machinery will find it especially useful for observing observ-ing noises due to irregularities in the working of small parts of machines, which may be either difficult or dangerous danger-ous to approach in any other way. New York Commercial Advertiser. |