Iowa County democrat. [volume] (Mineral Point, Wis.) 1877-1938, 1883-02-23
ARGALL'S FEED-WATsR HEATERS.

Above we give cut of the Feed
Water Heater for locomotives, of
which Mr.. James Argall. Of this city,
is inventor and patentee. The good
qualities of Argall's heaters for sta
tionary engines need not he set forth
here, as they are going mo general
use, and are meeting with increased
favor every day.
We have examined tie Argall's
stationary heater erected 1T the Min
eral Point Zinc Works, aud consider
it perfect model of simplicity
standing motionless, Introducing
boiling water into the boiler, saving
a large percentage of fuel, dispensing
with all expansion and contraction
Of iron, and SO completely condens-
ing the exhaust us to avoid all
back pressure of the engine, indie
pendent of either cost or care op-
Grated by the exhaust steam alone.
The merits and utility of the loco
connective heaters are well explained
by the following answers by the
inventor to questions commonly
asked regarding them:
Question. If this heater is ap-
piled to a locomotive, what would
be the result?
Answer. 1t would utilize all the
exhaust steam and hot gasses from
the furnace, now wasted through the
smoke stack to the open air-heat-
ing the water in the heater to a very
high temperature.
If q locomotive is required to run
a speed of twenty miles per hour,
with driving wheels five feet diam
eter, cylinders sixteen inches diam
eter, by twenty-four inches stroke, it
therefore follows liz revolutions per
minute will accomplish that speed.
A cylinder of 16 in. diam. and "a
in. stroke will hold 1925! cubic in
ches. Locomotives have two cylin-
ders and each piston is swept
through twice, which measures four
cylinders full of steam to each revo-
luton of the wheels; thus 4S254 x 4
r 1902 cubic inches of steam are
used to each revolution, forcing
through the exhaust nozzels creating
a vacuum in the stack, sucking and
carrying away with it Gin addition)
the flame and hot air wasting from
the fire box through the smoke
stack.
A medium sized heater has heat
ing surface of 1880 square inches to
utilize the caloric wasted through the
smoke-stack. The average quantity
of water to be evaporated to pull a
train of 400 tons would not exceed
one pint to each revolution at the
above speed.
And now comes the whole thing
in a nutshell: This one pint of
water to each revolution, 29cubic
inches only, pumps through an ap-
paratus of 1880 square inces heating
surface, en- Ieloped 112 times per
minute with 1902 cubic inches of
caloric found in the smoke stack at
a temperature ranging from 500 to
$50 degrees Far. Each jet of water
passes II feet through the heater Gin
thin sheet and occupies three
minutes of time before entering the
boiler. The above shows the enor-
nous heating capacity of this heater.
See Experiments made on Tenn
peratures, page 396 in Catechisn of
the Locomotive by NJ. n. Foraey,
Mechanical Engineer.
Question. What is the benefit of
heating this water to SO high tem-
perature
Answer, See page 423 by NJ n.
Forney: "On a grade it was Noes
sary to convert at the rate of750
lbs of hot water into steam In nile
which required 649,725 units Of Heat.
To heat an equal amount of soid
water to that pressure of stsam
would be necessary to transmlS at
the rate of ST., 425 units of hea to
the mile"
This hot water can be continuans-
" supplied by the use of Argals
Feed Water heater, which eyPo-
rates one quarter more water in ne
boiler than can be with cold WIDER
in a given time
Question. Is this percentage of
evaporation important or not2
Answer. Yes, very Important
The evaporation of water is steam,
and steam IS power. To pull a |
train over grade 30 feet to ME
AMI 20 miles per hour, its ress |