Patents Completed.
Page 20
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Cooling Mushroom Valves.
A Motor Digging Machine.
MA SCHINENFA BR1K A en SBERG -N trENBERG, A.g. No, 409/13, dated under International Convention 8th January, 1912.—The valves of an internal-combustion engine are cooled by causing a positive circulation of water to their close proximity. A
groove is provided in the valve-casing round about the valveseat and water is forced through the channel thus formed to absorb the heat.
This water escapes by email passages into the cylinderjacket, and owing to the small size of these passages it issues at a high velocity, so that eddies are formed, which prevents the formation of incrustations on the hottest portion of the cylinder.
If a continuous slot is used instead of small passages the valve-chamber is isolated from the cylinder-jackets and both are free to expand unequally according to their different temperatures.
J. LYON, No. 5396, dated 4th March, 1913.—In this spanner one of the jaws, the left-hand one, is hinged to the handle, and the second jaw is hinged on the first near the top. On the central pin, by which the left-hand jaw is pivoted, there is a cam provided which projects upwards and engages a tail piece on the right-hand jaw, and this cam is accommodated with a series of notches to engage a pawl pivoted on the handle.
When the handle is turned upwards towards the left, the pawl pushes on to the cam and thereby holds the right-band jaw of the spanner tightly on the nuts, so that there is little tendency to slip in tightening up.
Should the nut be situated in an awkward position the handle may he swung found so that the pawl engages one of tho other notches on the cam, and a similar action takes place as in the previous case.
The smaller jaw may be made interchangeable so that various sizes of nuts can be accommodated.
As soon as the pressure is taken off the handle, the jaws become quite free on the nut.
K. F/CKERT, No. 10276/13, dated under International Convention 28th October, 1912.—In this machine an oscillating knife is mounted at the rear, being operated by outside cranks from a large wheel driven by the engine. This knife is forced down into the ground beside the oha,nnel already formed, and, when it is fully advanced, a spoon-shaped knife beside it moves towards it and grips the strip of earth which has been cut.
The two cutters are lifted upwards and backwards together and the clod is shot into the hopper at the rear. During the upward travel of the knives the vehicle is moved forward a definite distance by a ratchet-and-pawl drive on the rear wheels.
P. BURT AND J. S. MATTHEW, No. 5683, dated 7th March, 1913.—In engines having the Argyll sleeve-valve, which moves elliptically, it is sumetimes desirable to provide auxiliary inlet ports so that a full charge of mixture can be drawn into the cylinder, at the correct time, although the engine may be running at a very high speed.
To effect this, the cylinder and sleeve-valve are each provided with one or more auxiliary ports near their lower ends, which are uncovered by the piston when at the bottom of its stroke. These ports in the sleeve are so arranged that they, and the auxiliary inlets, register at the same time as the piston head readies them on the inlet stroke.
During the compression and firing strokes the auxiliary ports are maintained closed by the sleeve-valve in the same manner as in the case of the main ports.
The additional ports are connected with the main inlet by a passage formed in the cylinder wall, or by separate outside pipe connections.
Owing to the fact that the auxiliary ports in the sleeve and cylinder are only uncovered by the piston towards the end of the stroke, they are shielded from the maximum explosion pressures and temperatures, so that there is no undue deterioration.