Model (scale 1: 6) of McCarter's patent condenser, 1869-73

Model (scale 1: 6) of McCarter's patent 1869-73 condenser

This form of condenser was patented in 1869-73 by Mr. J. W. McCarter, the object being to dispense with the usual air pump. It consists of a vertical cylinder that acts as an ordinary jet condenser. Below the condenser is a closed vessel into which the condensed water flows through a foot valve, and from which it is discharged by a delivery valve. Steam is admitted to this closed chamber by a valve driven by tappets on a rotating shaft above, so as to give six short admissions of steam per minute. At the same time that the steam valve is opened a similar delivery valve is opened, the air and condensed water being thus blown out by the steam. The arrangement is equivalent to using Savery's engine or a pulsometer in the place of the ordinary air pump.