تسجيل الدخول

تسجيل

The Condensing Pump

المؤلف:  GEORGE A. HOADLEY

المصدر:  ESSENTIALS OF PHYSICS

الجزء والصفحة:  p-161

2025-11-11

439

If the valves in the pump shown in Fig. 1 were arranged to open downward instead of upward, the pump would be a condenser. When it is necessary, however, to transfer a gas from one vessel to another, an arrangement like that shown in Fig. 2 is used. In this pump the piston head no valve. The pipe P is attached to the gas supply, and the valve in P opens toward the cylinder. The pipe P' is attached to the vessel in which the gas is to be compressed, and its valve opens away from the cylinder.

The valveless bicycle pump, Fig. 3, consists of a tube, to one end of which there is fixed a piston head carrying a concave leather collar. When the cylinder is drawn back, the air passes around the collar, but when it is pushed forward the collar fills the cylinder, the air is compressed, and passes through the tube into the tire.