See also:

• INJECTOR (from Lat. injicere, to throw in)

INJECTOR (from See also:

• LAT

Lat. injicere, to throw in)  , an appliance for supplying See also:

• STEAM
• STEAM (0. Eng. steam, vapour, smoke, cf. Du. steam; the origin is unknown)

steam-boilers with See also:

• WATER

water, and especially used with See also:

• LOCOMOTIVE

locomotive boilers . It was invented by the See also:

• FRENCH
• FRENCH, DANIEL CHESTER (1850– )
• FRENCH, NICHOLAS (1604-1678)

French engineer H . V . See also:

• GIFFARD, GODFREY (c. 1235—1302)
• GIFFARD, WALTER (d. 1279)
• GIFFARD, WILLIAM (d. 1129)

Giffard in 1858, and presents the See also:

• PARADOX (Gr. treat, beyond, contrary to, Sofia, opinion)

paradox that by the pressure of the steam in the See also:

• BOILER

boiler, or even, as in the See also:

• CASE
• CASE, JOHN (d. 1600)

case of the exhaust steam See also:

• INJECTOR (from Lat. injicere, to throw in)

injector, by steam at a much See also:

• LOWER

lower pressure, water is forced into the boiler against that pressure . A diagrammatic See also:

• SECTION
• SECTION (Lat. sectio, cutting, secare, to cut)

section illustrating its construction is shown in figure . Steam enters at A and blows through the See also:

• ANNULAR, ANNULATE

annular orifice C, the See also:

• SIZE

size of which can be regulated by a See also:

• VALVE (Lat. valva, a leaf of a double or folding door, allied to volvere, to roll, as of a door on its hinges)

valve not shown in the figure . The feed water flows in at B and See also:

• MEETING (from " to meet," to come together, assemble, 0. Eng. metals ; cf. Du. moeten, Swed. mota, Goth. gamotjan, &c., derivatives of the Teut. word for a meeting, seen in O. Eng. Wit, moot, an assembly of the people; cf. witanagemot)

meeting the steam at C causes it to condense . Hence a vacuum is produced at C, and consequently the water rushes in with See also:

• GREAT

great velocity and streams down the combining See also:

• CONE (Gr. Kwvos)

cone D, its velocity being augmented by the impact of steam on the back of the See also:

• COLUMN (Lat. columna)

column . In the lower See also:

• PART

part of the nozzle E the stream expands; it therefore loses velocity and, by a well-known hydrodynamic principle, gains pressure, until at the bottom the pressure is so great that it is able to enter the boiler through a check valve which opens only in the direction of the stream . An overflow See also:

• PIPE

pipe F, by providing a channel through which steam and water may See also:

• ESCAPE (in mid. Eng. eschape or escape, from the O. Fr. eschapper, modern echapper, and escaper, low Lat. escapium, from ex, out of, and cappa, cape, cloak; cf. for the sense development the Gr. iichueoOat, literally to put off one's clothes, hence to sli

escape before the stream has acquired sufficient See also:

• ENERGY (from the Gr. ivipyela; iv, in, ipyov, work)

energy to force its way into the boiler, allows the injector to start into See also:

• ACTION

action . Means are also provided for regulating the amount of water admitted between D and C . In the exhaust-steam injector, which See also:

• WORKS

works with steam from the exhaust of non-condensing engines, the steam orifice is larger in proportion to other parts than in injectors working with boiler steam, and the steam See also:

• SUPPLY (through Fr. from Lat. supplere, to fill up)

supply more liberal .

In self-starting injectors an arrangement is provided which permits See also:

• FREE

free overflow until the injector starts into action, when the openings are automatically adjusted to suit delivery into the boiler .