THE DIAPHRAGM.
Fig. 35.
Under each vehicle of a train, as seen in [Fig. 35], a diaphragm is securely fastened which performs the combined duties of cylinder and piston. It consists of a kettle-shaped casting with a loose disk of heavy rubbered duck fastened over its mouth; the center of the disk being provided with an iron plate, through which passes an eye-bolt for forming connection with the brake-lever. The inside of the diaphragm is connected to the pipe which passes along the train, and has its front end connected with the ejector on the locomotive.