Practice
and Theory of the Injector
Oooooh. Perpetual motion! Well.... it almost seems that way.
If you need to get water into a boiler running under a 150 pounds of steam pressure, you'll have to push the water into the boiler at a pressure greater than 150. That should be obvious. Yet, with an injector, you can actually use 150 psi steam through venturi to carry water into the boiler without any kind of pump. It's almost like magic... like pulling yourself up by your bootstraps.
Here, in the 1894 volume you get the technical details of injectors along with the basic mathematics that allows you to design or modify an injector to meet your needs. And it's good stuff.
Chapters include early history, development of the principles, definition of terms, the delivery tube, the combining tube, the steam nozzle, the action of the injector, application foreign and American designs, and determination of size through tests.
Kneass,
a member of the American Society of Mechanical Engineers, Franklin Institute,
and Engineer's Club of Philadelphia, teaches you the theory and science behind
this amazing device which quickly became an essential piece of steam power
technology.
You'll see many different designs like the Sellers, Giffard, Loftus, Hancock and others. But the real strength is being taught by an engineer of the time who really understood the injector and could explain it in detail. Great stuff!
We
offered this book a few years ago, but chose not reprint it for a while. This
resurrection includes a rare article not in the first reprinting from a French
engineering magazine reprinted Scientific American in 1882 discussing "On
Feed-Water Injectors of Various Systems." You get numerous mechanical drawings
of European injectors all decended from Giffard's original design. Now whether
they work all that well or not, well... I can't say. But you'll find more
ideas here than you're likely ever to find time to pursue. You'll have enough
material to keep you experimenting for another century.
Steam power is your thing, you say? But you don't know much about injectors? Start here. You should have this. Get one. 5-1/2 x 8-1/2 softcover 150 pages
No. 23063 ... $11.95
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