A VALVELESS ENGINE.

Dominion, Volume 2, Issue 565, 21 July 1909, Page 5

A VALVELESS ENGINE.

MR. -W. H. IRENGROVE'S INVENTION,

. At noon yesterday a number of Wellington pressmen were invited to inspect a new valveless engine, which' has .been invented by Mr. ,W. H. Treogrove,' of - Trengrove i and Petheriok, J\Vellingtan, an invention which-has been taken up by >'syndicate, patented in fifteen countries, and is to be taken to England .forthwith, i''-'Experts, who have examined the engine state that for simplicity in maie and aotion, and economy in cost of building and space 'the invention, is revolutionary. ' Itdoes away with valves and springs of all kinds. Inside a circular water-jacket is a -round cylinder,' the top ,of which is pierced in three places, in an- arc—for 1 .the intake; the' sparking plug, and the'exhaust. . Inside that again (and separated, from the outer by a film of oil) is an inner cylinder, at the top with a cylinder-lid, having an aperture, which as it. revolves /comes directly, opposite; the apertures in the top of the outer cylinder referred to, so ; that, as'the inner , cylinder revolves .tho vaporised petrol is. admitted, the explosion takes place when the aperture, in the lid is opposite the sparking vent, and the burnt gas gets away ;whon tho aperture is opposite the exhaust.. The- piston is con.nected' in.;±he, ordinary way with- the crank shaft}' dn \vhich is fitted .the. gearing wheels ■responsible for the rotary, action of the-in-ner cylinder, which i revolves once to-every two revolutions, of the shaft. The lower side's of the inner. cylinder are' pierced ,by a num;ber of small holes, .from which,grooves run up the .sides, as conductors of the lubricant admitted through the holes. So ipuoh oil can b.e sent up in this'-manner that, special means have been adopted to decrease the amount drawn. . ' "!.'. ' ; . '■

The/engine can -bo ! fed .with gas, steam, petrol', -or. keroseriey and its claims to superiority, over the ordinary valve,engine can be summarised as Mow:—(!) . Its economy in first cost. (2) Its simplicity,, resulting from the .great reduction in- working parts. (3) Tho economy it effects in working and<space. (4) The added power it is capable of producingr (5), Base; in starting with a "full loadon; (6) Its lightness and reduction to a minimum of the-risk of accidents. Tt should be stated that-the engine, wliich is especially adapted for motor-cars and motor-boats as well as. stationary work, is so'simple that it'can be understood in a'few minutes and taken to pieces-a|most .as ..quickly.'. The engine has a 4-inch, cylinder, with a 4J-inch- stroke; / tho number, of revolutions aro 1000 per minute, and it develops nearly 7-horse power. • ' _ / W- H. : Trengrove, with Mi?. : Harry Price : (of H. Pnce and Co., .Wellirgton); leaves for .England with the invention by the ' Manuka on Friday. '