• Giffard injector
    Giffard injector
  • WordNet 3.6
    • n injector a contrivance for injecting (e.g., water into the boiler of a steam engine or particles into an accelerator etc.)
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Additional illustrations & photos:

Locomotive injector Locomotive injector
Injector Jet Injector Jet

Webster's Revised Unabridged Dictionary
    • Injector (Mach) A contrivance for forcing feed water into a steam boiler by the direct action of the steam upon the water. The water is driven into the boiler by the impulse of a jet of the steam which becomes condensed as soon as it strikes the stream of cold water it impels; -- also called Giffard's injector, from the inventor.
    • Injector One who, or that which, injects.
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Century Dictionary and Cyclopedia
    • n injector One who or that which injects; specifically, an apparatus for forcing water into a steam-boiler. It was first reduced to practical form by Giffard, hence often called Giffard's injector. It is essentially a jet-pump, in which a jet of steam is continuously changed by rapid condensation to a water-jet, the molecules of which are obliquely directed toward the longitudinal axis of the jet by the conical nozle through which the steam issues. There results from this a jet of water very much smaller than the steam-jet from which it is condensed, but retaining the same velocity. The entire energy of the jet is thus applied to a much smaller area than the cross-section of the steam-jet, this area being inversely as the density of the water is to that of the steam before condensation. Thus, a considerable part of the pressure upon the area of the steam-jet being concentrated upon a much smaller area by the conversion of the energy in the water-jet into work, the latter is competent to force other water into the boiler. The essential parts of the Giffard injector are shown in the diagram, in which a is the steam-pipe with conical nozle c, b the water-supply pipe, d d a combining-tube, e a water-tube leading to the interior of the boiler, and f an overflow for water and steam. A check-valve prevents back-flow. Adjustability of the steam-nozle and various modifications which increase efficiency and render the injector more convenient in use have been added by other inventors. In operation steam flows through the pipe a, and, driving the air out of d, produces a partial vacuum in b. Water rising through b to fill the partial vacuum surrounds the steam nozle and steam-jet, sudden condensation follows, and the energy of the water-jet so produced drives it and the water which has entered d past the central opening in d d and past the check-valve into the tube e, and thence into the boiler. The proportion of water to steam requires careful adjustment. In the Sellers injector the combining-tube is self-acting, and regulates the supply of water to the pressure of the steam. In other injectors a separate lever must be moved to adjust the apparatus to the pressure, to prevent waste of steam or water. In the diagram the excess of either water or steam escapes between the opposed nozles at feminine Injectors are also used to obtain a vacuum in continuous railroad-brakes, but in this instance the apparatus seems to be more properly an ejector. See ejector.
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Chambers's Twentieth Century Dictionary
    • Injector one who injects: something used for injecting, especially an apparatus by which a stream of water is forced into a steam-boiler
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Chambers's Twentieth Century Dictionary
L. injicĕre, injectumin, into, jacĕre, to throw.


In literature:

I insert the tip of the loaded injector in the hole thus made and I blow.
"The Life of the Fly" by J. Henri Fabre
The boiler, which is fed by two injectors, is of steel, 11 ft. 5 in.
"Scientific American Supplement, No. 458, October 11, 1884" by Various
The injector valve for the creosote is shown to a larger scale in Fig.
"Scientific American Supplement, No. 633, February 18, 1888" by Various
Will an injector work with a leak between the injector and tank?
"The Traveling Engineers' Association" by Anonymous
Cold weather coming on I had to stop, as I could not use the Injector in freezing weather, but I was greatly benefited.
"The People's Common Sense Medical Adviser in Plain English" by R. V. Pierce
By H. B. F. The Injector.
"Scientific American, Volume 40, No. 13, March 29, 1879" by Various
She watched Arden prepare an injector, her thoughts going to what would be happening to her shortly.
"Thakur-na" by Ann Wilson
Because of this, injectors were adopted after their introduction in 1860.
"The 'Pioneer': Light Passenger Locomotive of 1851" by John H. White
The water inside a boiler is kept at a proper level by (1) pumps or (2) injectors.
"How it Works" by Archibald Williams
He said he was at the time stooping down to adjust the injector.
"Railway Adventures and Anecdotes extending over more than fifty years" by Various

In news:

It requires only electrons , which can be created from matter inside the injector with energy that is constantly recycled.
Phihong has developed a single port power injector for Power-over-Ethernet (PoE) applications for use with Gigabit systems.
The Cajun Injector has alternative Thanksgiving dinner ideas.
FXAA Post Process Injector .
Carrie Clifford-Bennett, APRN, NP-C, MSN has been hired as a new Certified Injector at Privé Med Spa.
One of the easiest ways to marinate a turkey is by using a needle-like injector.
The best way to check injector pulse width is with an oscilloscope, and there are two ways to view that signal: current and voltage.
Bracco Diagnostics Inc is voluntarily initiating a Class I recall of nine lots of Isovue (iopamidol injection) pre-filled power injector syringes (Isovue PFS, to be used in combination with Stellant CT injection systems) due.
MCI7 8v71 stranded grey smoke increasing with accelleration (injector issue?
PharmaJet Inc has entered into a collaboration with CSL Limited to enable Afluria ® influenza vaccine to be delivered with the PharmaJet Stratis ® needle-free jet injector, as soon as the 2013-2014 flu season.
CSL to Use PharmaJet Needle -Free Injector for Flu Vaccine.
The Pro Pack 's individual pouches hold bridges, resins, injectors, drills and various other accessories securely in place.
The Pro Pack 's individual pouches hold bridges, resins, injectors, drills and various other.
Uniqair Technologies Ltd Plasma -Injector.
Then we saw that the flexplate had chewed through part of our injector harness.

In science:

The Switchyard 120 (SY120) delivers main injector beams to the Meson Detector Building. It must run in conjunction with proton delivery to the pbar source and the neutrino programs. For the purposes of program planning, the MTBF is administratively limited to no more than a 5% impact on these other programs.
Roadmap for ILC Detector R&D Test Beams
MINOS (Main Injector Neutrino Oscillation Search) experiment was also proposed in 1995, with a neutrino beam pointed from Fermilab to the Soudan mine in Minnesota, with a baseline of 735km.
Neutrino Mass
The primary cost driver for the ILC is the superconducting RF technology used for the Main Linacs, bunch compressors and injector linacs.
ILC Reference Design Report Volume 1 - Executive Summary
One of the advantages of their setup was the time structure of the PSI injector cyclotron, where bursts of width 0.7 ns, separated by 20 ns, were obtained at 72 MeV, increasing to about 1.2 ns, separated by 70 ns, at 55 MeV.
Review of quasi-elastic charge-exchange data in the nucleon-deuteron breakup reaction
The test beam originates from the resonant extraction of at least one Booster batch inside the Main Injector (MI).
Summary of the Linear Collider Testbeam Workshop 2009 - LCTW09