Without a pump or two spares, they accomplished the same thing.
If the air is just let out of your tires, do you think a bicycle pump might be enough to get you running?
The general scheme of Geisler's pump is shown in fig.
The steam is introduced into the pipes at about the pressure of the atmosphere, and is sucked through the system by means of a vacuum pump, which at the same operation frees the pipes from air and from condensation water.
She led the way to the pump-house, and there in the corner was one of the setters with five dear little pups!
At last she got up, gave me the mug, and led me out of the door to the pump-house.
In the old days there was a hand pump in the kitchen and no hot water you didn't boil yourself.
He took the opportunity to casually pump Hunter on the Byrne disappearance.
Clarissa sat her chair like a queen on a throne, the toe of a red pump and a white plaster clad foot peeping out from under her long gown.
During the summer it is a place of considerable resort for the sake of its waters - saline, chalybeate and sulphur - and it possesses the usual accessories of pump-rooms, baths and a recreation ground.
Robert Boyle, who turned his skill to account in the construction of his air-pump. On the 12th of November 1662 he was appointed curator of experiments to the Royal Society, of which he was elected a fellow in 1663, and filled the office during the remainder of his life.
The sand-pump reel is set in motion by pressing a lever, the reel being then brought into contact with the face of the band-wheel.
" The ordinary sand-pump or bailer, consists of a plain cylinder of light galvanized iron with a bail at the top and a stem-valve at the bottom.
The 'disposition of these valves divides this type of pump into suction pumps and force pumps.
The pump devised by D FIG.
Just then the nurse brought Helen's little sister into the pump-house, and Helen spelled "baby" and pointed to the nurse.
To the south and west of the city a large district is laid out as a park, where there is a statue to the memory of John Maurice of Nassau-Siegen (1604-1679), who governed Cleves from 1650 to 1679, and in the western part there are mineral wells with a pump room and bathing establishment.
The fishing tools are generally attached to the cable, and are used with portions of the ordinary string of tools, but some are fitted to pump-rods or tubing, and others to special rods.
There is usually fixed above the sucker a short iron valverod, with a device known as a rivet-catcher to prevent damage to the pump by the dropping of rivets from the pump-rods.
The pumps employed to force the oil through the pipes were at first of the single-cylinder or " donkey " type, but these were found to cause excessive wear - a defect remedied by the use of the Worthington pump now generally adopted.
Drainage channels are provided, usually along the main haulage roads, by which the water flows to a sump excavated at the pump shaft.
Tanks operated by the main hoisting engines, and of capacities up to 50o gallons or more, are applicable under several conditions: (1) When the shaft is deep, the quantity of water insufficient to keep a pump in regular operation, and the hoisting engine not constantly employed in raising mineral, the tank is worked at intervals, being attached temporarily to the hoisting rope in place of the cage.
All work simultaneously, each raising the water to a tank or sump above, whence it is taken by the next pump of the system, and finally discharged at the surface.
When mine water is acid the working parts of the pump must be lined with or made of bronze or other non-corrosive material; or the acid may be neutralized by adding lime in the sump.
The invention of the mechanical air-pump is generally attributed to Otto von Guericke, consul of Magdeburg, who exhibited his instrument in 1654; it was first described in 1657 by Gaspar Schott, professor of mathematics at Wurttemberg, in his NI echanica hydraulico-pneumatica, and afterwards (in 1672) by Guericke in his Experimenta nova Magdeburgica de vacus spatia.
The action is essentially that -of the common suction pump. The construction was subsequently improved by many experimenters, notably by Boyle, Hawksbee, Smeaton and others; and more recently two pump barrels were employed, so obtaining the same degree of exhaustion much more rapidly.
This type of pump is, however, not very efficient, for there is not only leakage about the valves and between the piston and cylinder, but at a certain degree of exhaust the air within the vessel is insufficient to raise the inlet valve; this last defect has been met in some measure by using an extension of the piston to open and close the valve.
The so-called oil air-pumps are much more efficient; the valve difficulty is avoided, and the risk of leakage minimized; whilst in addition there is no air clearance between the piston and the base of the cylinder as in the older mechanical forms. The Fleuss pump may be taken as an example.
A more complicated pump, but of much the same principle, was devised in 1784 by Joseph Baader, to be improved by C. F.
Lifting B to a sufficient level, turning the cock Geisler's Air-Pump. so as to communicate with the atmosphere and letting the mercury flow into A until it gets to the other side of the stop-cock, which is then placed in the intermediate position.
Supposing the vessel to be exhausted to have already been securely connected to the pump, we now lower the reservoir B so as to reduce the pressure in A sufficiently below the tension in the gas to be sucked in, and, by turning the cock so as to connect A with the vessels to be exhausted, cause the gas to expand into and almost fill A.
Of mercury to balance the pressure of the atmosphere, a Geisler pump necessarily is a somewhat long-legged and unwieldy instrument; in addition, the long tube is liable to breakage.
The great advantages of Sprengel's pump lie in the simplicity of its construction and in the readiness with which it adapts itself to the collecting of the gas.
In this it passes through four sheets of water, by which it is not only freed from any dust and dirt that may have come over with it from the kiln, but is also cooled to a temperature which permits an air-pump to withdraw the gas from the kiln, through the gas-washer, and force it into the saturators, without overheating.
The "receiver" must be connected on the one side to the condenser, and on the other to the exhaust pump. A safety vessel and a manometer are generally interposed between the pump and receiver.
This vessel has two tubulures: through one the end of the condenser projects so as to be over one of the receiving tubes; the other leads to the pump. By rotating the disk the tubes may be successively brought under the end of the condenser.
Distillation in a vacuum is practised in two forms: - if the pump draws off steam as well as air it is termed a "wet" air-pump; if it only draws off air, it is a "dry" air-pump. In the glycerin industry the lyes obtained by saponifying the fats are first evaporated with "wet vacuum" and finally distilled with closed and live steam and a "dry vacuum."
We went out to the pump-house, and I made Helen hold her mug under the spout while I pumped.
If they succeeded, they'd stick your guy... or girl, in a box in McLean and pump 'em dry.
Pump gas and sign baseball cards?
Reading and assembly rooms adjoin the pump-room.
These muscles act so as to pump the blood through the respiratory organs.
As the larger part of the water in a mine comes from the surface, the cost of drainage may be reduced by intercepting this surface water, and collecting it at convenient points in the pump shaft from which it may be raised at less cost than if permitted to go to the bottom.
I shows the arrangement in a suction pump. A is the cylinder within which the piston B is moved up and down by the rod C. D is the inlet pipe (the lower extremity of which is placed beneath the surface of the liquid to be G removed), and G is the outlet pipe.
It is seen that the action is intermittent, liquid only being discharged during a down stroke, but since the driving force is that which is supplied to the piston rod, the lift is only con ditioned by the power available and by the strength of the pump. A continuous supply can be obtained by leading the delivery pipe into the base of an air chamber H, which is fitted with a discharge pipe J of such a diameter that the liquid cannot escape from it as fast as it is pumped in during a down stroke.
It can be considerably shortened, the two vessels A and B brought more closely together, and the somewhat objectionable india-rubber tube be dispensed with, if we connect the air-space in B with an ordinary air pump, and by means of it do the greater part of the sucking and the whole of the lifting work.
In the pump generally attributed to Topler, but which was previously devised by J.
Mile of Warsaw in 1828, who termed it a "hydrostatic air-pump without cylinders, taps, lids or stoppers," this is attained by using, both for the inlet and the outlet, vertical capillary glass tubes, soldered, the former to somewhere near the bottom, the latter to the top of the vessel.
High, obviously act as efficient mercury-traps; but the already considerable height of the pump is thus multiplied by two.
A pump similar to Tdpler's construction was devised by Mendeleeff, and the original device has been much improved by Wiedemann, BesselHagen and others.
The best-known pump of this type was invented in 1865 by H.
4), consists of a vertical capillary Pump. glass tube a of about 1 mm.
P. Thompson, The Development of the Mercurial Air Pump (1888).
There are in addition some pearling grounds in the Mergui Archipelago, which have a very recent history; they were practically unknown before 1890; in the early 'nineties they were worked by Australian adventurers, most of whom have since departed; and now they are leased in blocks to a syndicate of Chinamen, who grant sub-leases to individual adventurers at the rate of £25 a pump for the pearling year.
In the Greek school at Alexandria, which flourished under the auspices of the Ptolemies, the first attempts were made at the construction of hydraulic machinery, and about 120 B.C. the fountain of compression, the siphon, and the forcing-pump were invented by Ctesibius and Hero.
The siphon is a simple instrument; but the forcing-pump is a complicated invention, which could scarcely have been expected in the infancy of hydraulics.
It was probably suggested to Ctesibius by the Egyptian Wheel or Noria, which was common at that time, and which was a kind of chain pump, consisting of a number of earthen pots carried round by a wheel.
The water forced by the force-pump against the Pelton wheels returns by a waste-pipe to the tank, from which the force-pump takes it again.
Then she dropped on the ground and asked for its name and pointed to the pump and the trellis, and suddenly turning round she asked for my name.
The sand-pump descends by gravitation, and its fall is checked by pressing hack the lever, so as to throw the reel against a post which serves as a brake.
He was the first to employ mercury for the air-pump, and devised a method of determining longitude at sea by observations of the moon among the stars.
He glanced at the dirty innyard in the middle of which soldiers were watering their lean horses at the pump while carts were passing out of the gate.