The Ellis Force Pump.

Progress, Volume III, Issue 8, 1 June 1908, Page 271

The Ellis Force Pump.

This pump is exceedingly simple and compact, presenting some novel features, which should make it a powerful competitor in the field of hydraulics. The photo herewith, is taken from one of these pumps just built to the order of the New Zealand Public Works Department. It occupies less than a cubic foot of space, and can be fixed in any position i.e., upside down, on its side, or as shown. It is driven by a belt at a speed of 80 or 100 revolutions per minute, and either a chain or ordinary belt can be used. That shown in the photo, is driven by an ordinary belt from an oil-engine. The pump consists of an outer shell or drum, which also forms the pulley to receive the belt ; within this drum is another drum, or revolver, which revolves together with the outer drum, but from

another centre^eccentric. therewith ;^the w ater is squeezed or forced through the deliverypipe by the powerful wedge-shaped action of the revolving drums, one within the other, much the same as a body is squeezed between a broad wheel and the road it runs on, or as material is squeezed between the rollers of a mangle. The suction is produced by the continuous enlargement of the space over one-half of the circumference and the pressure, or forcing, by the continuous contraction of the other half, so that a steady continuous flow through the pump is kept up, in at one axle and out at the other, no air vessel being required. Only nine pieces constitute the pump proper, and these are very simple and easily made, and there are no valves whatever. The tests of the pump shown proved highly successful. The pump was designed, and the patterns made, by P. Ellis and Son, Ebor street, and the machining by Messrs. Andrews and Manthel, Wellington. Patents are already applied for, and the invention belongs to the Ellis Motor Company, Limited, Wellington. Mr. Ellis informs us that the pumps can be made to any size and capacity, either for high or low lifts, and can be applied to almost every purpose for which pressure pumps are rcqv ircd.