PATENTS SUMMARIZED.
Page 22
If you've noticed an error in this article please click here to report it so we can fix it.
New American Rotary Valve.
A novel type of rotary valvo bas.been patented by an American, and is registered in tills country' by. W. J. Mel, lersMackson in. specification No.
115,701. The interior of the head of the cylinder is hollow and hemispherical. Exhaust and inlet ports open into this compartment in a suitable manner. Within the cavity, and turned to be an taccurate fit, is a valve, which also takes the form of a hemisphere. As illustrated, this valve has one pert grit in its 'wall, and as the valve revolves, this _port presents itself alternately to the exhaust and inlet passages. The valve this case, besides trevolving, also has a 'gyratory motion, the object being to prevent the formation of a groove or ridge upon the inner surface of the cylinder head. In an alternative arran,gsment, however, the ports may I.,:_,disposed so that they are uncovered ancLcovered by the valve, as a result
of the gyratory motion. It is also, however; caused to revolve so as still to prevent the formation at ridges.
Several methods of operating the Valve gear arZi illustrated and described, and it is shown also adapted ,either for is heavy-oil engine, or simply Js a patrol engine. A special form is illustrated, as being particularly suitable for aer6 plane work. The wide application of this invention is thus demonstrated. The principle of the several advantages • claimed is that the valve is continuously wearing itself 'in, stud; beds better as time goes on. Means' are provided for adjustment of the-valve on to its seating, and a very slight play is also allowed so that On the suction stroke the valve lifts slightly from its seat and allows lubricating oil tct flow between the wearing surfaces. We illustrate one of the several methods of driving this valve. A horizontal worm shaft, running the full length of the engine gears with a worm wheel, the axis of which is vertical. The bottom of the spindle to Which the worm wheel is keyed is formed with a cranked portion. On this cranked. portion, and carried by a ball journal bearing, is an internally-cut bevel gear, which is secured to the spindle . of. the valve._ Seetirod .concentrically with the worm _wheel shaft is a bevel pinion, which' meshes with this gearwheel, and the pinion is stationary. It will be realized that revolution of the worm wheel causes the valve and internal gear to gyrate owing to the 'disposition of. its cranked end. The meshing of this in ternal gear, however, with the stationary pinion has also the effect of revolving the valve about its spindle as a centre. The ratio tf the internal gear and its pinion is two to one, and this gives the necessary ratio for the 141ve operation. The port in the valve which uncovers alternately the induction and exhaust passages also discloses the sparking plug to the combustion chamber at the proper periods.
Detail Improvements.
It. E. Green, in No. 115,795, mounts an engine in a chassis on a rack and pinion at the frant .end, and trunnions at the rear end, so that, by freeing, a eouple of wing nuts at the rear, the en gine can be Moved forward on the rack until' the flywheel is clear of the .clutch and dashboard. It can then he swung right over on the_front-eral, thus rendering accessible the crankcase. .
Redderwick, in No. 115,751, doscribes a locking device for screwed nuts pressed from sheet steel, so that when fitted over the hexagon of a plain nut, it converts it to the 'equivalent of a castellated one.
A power-eperated jack, designed to be applied to.' all. the four wheels of a car, and capable of being. operated either on allIfour wheels together or independently, is the subject of No. • 115,724, the patentee being G. Bowman.
In the paraffin vaporizer covered by specification No. 115,735, by P. O. Rowlands, the fuel is caused to travel in a spiral passage round the outside ol a. chamber, which may be _heated either by a fuel-fed flame within-A, or by any other similar means. '
The principal feature of No. 115,722, by members of the firm of Lucas, Ltd., which has to do with the design of combined lighting and generating setS, is the arrange.ment of the winding and switches.' The machine may be operated as a series motor whether the charging switch is open or closed.
`Modifications, in the design of small power-driven cultivators are 6inbeidied in specification. No. 115,690 by the Beeman Tractor Co, 'The steering of this tractor is operated by handlebars similar to those of a cycle. Steering is "effected , in the usual manner by this handlebar, while revolving the bar on its own axis controls independently the position of the cultivating tools.
E. T. Westbury describes a carburet
ter improvement in No. 115,706. The _petrol inlet' to the -.carburetter is. controlled by a taper needle. A jet of the ordinary type is not present, the petrol being drawn 'through a perforated copper and cotton gauze. A feature is the inter-connection of the suction-controlled. air-inlet and this taper needle. _so that the petrol. supplieS are increased to correspond with the additional air.