The can has a valvein the bottom opened from below like a trapdoor in a roof.
By lifting a brass pin that projects from this valve one can fill his hands with water without the aid of a servant.
The disc portion of the valve is known as its head, while the rod forged with the valve and by which the head is raised and lowered is called the stem.
Consequently the needle valve nut should be moved but the small fraction of a turn for each adjustment.
Such a valve may be located in a projection cast on either side of the top of each cylinder, or it may be inverted from this position and placed in the cylinder head.
This, however, is not a difficult operation, as the valve and its seat are generally placed in a removable "cage" that either screws in place or is held firmly in position by means of a clamp or like device.
In the case of engines having the valves in the head, the long push rod of each valve should be so loose as to move perceptibly when shoved up and down by the thumb and finger.
Suppose, for example, it is said that the inlet valve should open ten degrees after the beginning of the suction stroke.
Therefore such surfaces as the cams or valve stem rollers will demand less oil than will the bearings revolving at higher speed and carrying heavier loads.
It is well to test the setting of the valves occasionally by means of these marks, for wear at the rocker arms, the push rods, the valve stem, or the cam travelers will result in unevenly-timed valves.
When the needle valve is tightened, the volume of the mixture passing to the cylinders is the same, for it is only the proportion of gasoline vapor in that mixture that is changed.
When the exhaust valve is opened, its head is thrust directly in the path of the hot, out-rushing gases; these same gases also swirl around the edge of the seat.
A motor which may refuse absolutely to run at one position of the needle valve may give perfect results if the nut is unscrewed but the eighth of a turn.
Capsule 1-celled, 2-valved; each valve bearing on its face one placenta or a pair.
Valves of the capsule bearing the several-seeded placentae on their middle; after opening, each valve as it dries folds together lengthwise firmly, projecting the seeds.
Even the valve supplying fresh air for the nostrils of the occupants of the boat would not work and the situation grew more desperate with the flight of every second.
As the atmosphere became oppressively heavy, Boyton wanted to knock the valve off with a hammer; but the engineer showed him if that were done, they would be drowned.
They could not understand this, as the yacht was notoriously faster, and it became evident that the engineer of the Lucca must have got his safety-valve screwed-down.
There is one safety valveleft for people in such lives, and that is the world-old prerogative of talk.
The valve in the lowest tube should be cemented about 1/2" from the lower end with the flap up, that in the horizontal tube about 3/4" from the outer end with the flap out.
He had turned the switch, stopping the motor, and next inspected the valve caps where a fracture or loosening would have caused the hissing.
It may be the exhaust valve is stuck or does not seat properly, or the gas mixture is too weak to fire in the cylinder, or the spark may be insufficient or over-retarded.
The trouble is, the hammer is not more likely to strike the first of its terrible series of blows on the valve than anywhere else.
We think we could save steam by using a longer valve, and cut-off about 5/8 stroke, and make the exhaust space in the valve shorter, so that it will shut in a portion of the exhaust and form a cushion for the piston.
Will I have to enlarge the steam chest; the valve uses the whole length of it now?
We presume you refer to the rectangular yoke that receives the back of the valve in the class of engines having balanced valves.
As the length and travel of valve must be increased, it will be necessary to lengthen the steam chest, unless you can apply an independent cut-off valve.
At the end of the recoil, the gunner has only to act upon the valve by means of a hand-wheel in order to bring the gun into battery as slowly as he desires, through the action of the springs.
Where the air is used without heating, and cut off at one-third of the stroke, as in ordinary slide-valve engines CASE 6.
They are only refuelled once in twenty-four hours, for as soon as the wood is reduced to the state of charcoal a valve is shut in the upper part of the stove.
It is more common on shells than on stones, generally attached to the old valve of some cockle or scallop.
The throttle valvemay be fully open and the spark advanced for high speed; the throttle partially closed and spark retarded for slow speed.
For this purpose, an "exhaust valve lifter" is usually fitted, by means of which the exhaust can be kept permanently open, in order to relieve the resistance to pedalling which the compression stroke would otherwise offer.
The control of the speed and power of the engine is effected by the throttle, extra air valve and spark advance, the levers for which are all placed within convenient reach of the driver.
The trees now protected us from the violence of the wind, and we cast anchor, at the same time opening wide the emergency valve for the wholesale escape of the gas.
The air valve AV was an exhaust valve similar to the two gas valves VV in the great balloon, with the one exception that it was weaker.
It was time to have recourse to effective means, to open the manoeuvrevalve and let out a portion of our gas.
With this I pulled on the valve rope, and we came down with celerity but scarcely any shock.
What air it could not hold would escape through a comparatively weak valve ("Air Valve," Fig.
Pulling on the manoeuvre valve I let out a sufficient quantity of hydrogen and came slowly down to the surface of the water, in which the air-ship sank.
I had fallen to the roof of the Trocadero hotels by the fault of the smallest and most insignificant-looking piece of mechanism of the entire system--a weakened valve that let out the balloon's hydrogen.
As I had determined to land soon in any case I pulled on the valve rope and let out more gas.
I stood up clear on deck and shut the valve behind the helmet to let the air accumulate to carry me up again--I noticed a kind of whacking from above, as though they were hitting the water with an oar, but I didn't look up.
I couldn't see much, but I saw the game was up at a glance, gave my valve a tremendous twist, and went bubbling down again after poor Always, in as awful a state of scare and astonishment as you can well imagine.
When the muscles are contracted, they compress that portion of the veins which lie beneath the swell, and thus force the blood from one valveto the other, toward the heart.
When they are a semicircular concavo-convex scale something resembling the valve of a bivalve shell.
In regular operation the safety valve and steam gauge should be checked daily.
The condensed water in the cylinder was expelled through an escapement valve by the next entry of steam.
He further added a throttle valve for the regulation of steam admission, invented the automatic governor and the steam indicator, a mercury steam gauge and a glass water column.
Where two or more boilers are on one line, in addition to the valve at the boiler, whether this be an automatic valve or a gate valve, there should be an additional gate valve on each boiler branch at the main steam header.
In small plants the steam pressure should be raised sufficiently to cause the safety valves to blow, at which time the steam gauge should indicate the pressure at which the valve is known to be set.
The suggestions as to flanges for different classes of service made on page 311 hold as well for valve flanges, except that such flanges are not scored.
Case 4--Where non-return valve is placed before a bend, condensation will collect on steam line side and water will be swept by steam velocity against nozzle and false readings result.
The steam valve was then shut and the steam condensed by a jet of cold water.
A flanged stop and check valve of heavy pattern is attached directly to each drumhead, closing automatically in case of a rupture in the feed line.
When the steam in the displacement chamber had expanded, it was exhausted to the atmosphere through a valve instead of being condensed.
The details of the valve connection and general form of the closet itself, and the means of flushing it, are various, but the general principle is the same.
The proper means of supplying this tank with water is through a ball-cock or float-cock, the float of which opens the valve when the water gets low in the tank.
In other closets there is an intermediate plunger-valve separating the hopper from the trap.
I shall place the valve of the balloon where I can get at it more easily.
Hawkins, springing to the side of his contrivance and feeling excitedly for the valve which should shut off the supply of gasolene.
The ball breaks, the valve at the bottom opens automatically--and down goes the tank, full of extinguisher.
You have only to brush against the handle or the valve or the string, or whatever it may be that connects him with the outer world, and the demon awakes.
The lower valve is flat and has the large oval opening, shown in the plate, through which the foot of the animal protrudes and holds the shell on to the rock.
The valve shown in the plate is the flat valve, which looks like a fan.
The right valve is rounded and the left valve flat.
